Motorola Solutions DBR M12 MultiCarrier Site User Guide

Disconnecting Components:
- Disconnect the DC cables:
  - Expose DC cable lugs by pushing terminal boots back.
  - Unscrew the cable lugs of DC cables and remove them from the chassis.
  - Disconnect the alarm cable from the frame.
  - Disconnect the grounding cable by unscrewing the nuts on the double lug and pulling out the grounding cable connector.
- Disconnect the PSU chassis from the bracket:
  - Remove four screws in the chassis corners.
  - Slide the chassis out of the bracket on the rack.

FAQs

Q: Can I hot swap the DSC 8500 site controller module?
- A: Yes, you can hot swap the DSC 8500 site controller module without losing functionality. The standby site controller automatically becomes the active site controller and takes over for the replaced site controller.

Q: What precautions should I take before replacing the Power Supply Unit?
- A: Before replacing the Power Supply Unit, make sure to obtain a PH1 screwdriver and an Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that must be worn throughout the procedure. Its cable must be connected to a verified good ground.

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Figure 91: Power Cord Connectors

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2. Disconnect the DC cables: a. Expose DC cable lugs by pushing terminal boots back. b. Unscrew the cable lugs of DC cables and remove them from the chassis. Figure 92: DC Cables
RAFT 3. Disconnect the alarm cable from the frame. D Figure 93: Alarm Cable
4. Disconnect the grounding cable by unscrewing the nuts on the double lug and pulling out the grounding cable connector.
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Figure 94: PSU Chassis Grounding Cable
5. Disconnect the PSU chassis from the bracket: a. Remove four screws in the chassis corners. b. Slide the chassis out of the bracket on the rack.
DRAFT Figure 95: PSU Chassis Screws Location
6. Retrieve PSUs: a. With a Phillips PH1 screwdriver, loose the screw on the front of the Power Supply Unit (PSU). b. Push the prong to the left with one hand. c. With the other hand, use the PSU handle to draw it out of the chassis. d. Repeat step 6a to step 6c for the other PSU.
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Figure 96: Power Supply Units

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7. Retrieve the PSU dummy panel by unscrewing four screws on top and bottom of the chassis and drawing it out of the chassis.
DRAFT Figure 97: Retrieving the PSU Dummy Panel
8. With four short M3 screws provided with the panel, install the dummy panel on the unused slot of the new PSU chassis. The unused slot is the first one from the left. See Figure 96: Power Supply Units on page 189.
9. With four TORX screw, install the new PSU chassis into the bracket on the rack, and drive the screws to 55 in-lbs. See Figure 95: PSU Chassis Screws Location on page 188.
10. Install the PSUs in the chassis: a. Ensure that the lock screw is open. b. Slide each PSU into the chassis and ensure that each module clicks into place.
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c. With a Philips screwdriver tighten the lock screws. See Figure 96: Power Supply Units on page 189. 11. Connect DC cables to the new chassis: a. With the screws provided with the PSU chassis, screw the cable end with a log ring terminal to the
PSU chassis. b. Draw the terminal boots up to cover the long ring terminals. See Figure 92: DC Cables on page 187. 12. Connect the grounding cable to the new PSU chassis by screwing the end with a double lug to the location in the bottom left corner of the chassis. See Figure 94: PSU Chassis Grounding Cable on page 188.
WARNING: Do not disconnect the AC PSU alarm cable during operation. This cable must be connected to the PSU tray for the DC power to be provided to the DSC 8500. Removal of this cable from the AC Power Supply tray results in loss of power to the DSC 8500. AVERTISSEMENT: Ne débranchez pas le câble d’alarme du bloc d’alimentation CA pendant le fonctionnement. Ce câble doit être connecté au plateau d’alimentation CA pour que l’alimentation CC soit fournie au DSC 8500. Le retrait de ce câble du plateau d’alimentation CA entraîne une perte d’alimentation du DSC 8500.
13. Connect the PSU alarm cable to the back side of the PSU chassis.
T See Figure 93: Alarm Cable on page 187.
14. Plug in the power cords to the PSU chassis. See Figure 91: Power Cord Connectors on page 187.
F 10.4 Replacing the Power SupplAy Unit Prerequisites:
Obtain:
R PH1 screwdriver
Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that
D must be worn throughout this procedure. Its cable must be connected to a verified good ground
Procedure: 1. Remove the faulty power supply unit from the rack: a. With a Phillips PH1 screwdriver, loose the screw on the front of the Power Supply Unit (PSU). b. Push the prong to the left with one hand. c. With the other hand, use the PSU handle to draw it out of the chassis. See Figure 6. 2. Install the new PSU in the rack: a. Ensure that the lock screw is open. b. Slide the PSU into the chassis and ensure that it clicks into place. c. With a Philips screwdriver tighten the lock screws. 3. To monitor the power supply status, connect the power supply presence output to the Aux In on the DSC 8500 or to other monitoring device (for example MC Edge). See Configuring the Auxiliary Inputs on page 146.
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10.5
Replacing the DSC 8500 Site Processor
IMPORTANT: You can hot swap the DSC 8500 site controller module without losing functionality. The standby site controller automatically becomes the active site controller and takes over for the replaced site controller. Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action. The software upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed Software Upgrade on page 179.
Prerequisites: Ensure that you pulled the configuration and hardware information from the DSC 8500 to the Unified Network Configurator (UNC). See “Scheduling the Pull of Device Configurations” in the Unified Network Configurator User Guide.
NOTE: It may be impossible to pull the configuration and hardware information from the DSC 8500 to the UNC if the communication between the site controller and the UNC is severed. Obtain: Replacement DSC 8500 with known a MAC address T30 Torx screwdriver with torque setting 6.2 Nm (55 in/lb) 3/8″ socket and torque wrench set to 55 in-lbs
T Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that must be worn during the removal and installation of the DSC 8500 in the rack.
Procedure:
F 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground. CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. A ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les composants soient endommagés par les décharges électrostatiques. 2. Perform one of the following actions:
R If the DSC 8500 is non-operational, go to step 4.
If the DSC 8500 is operational, go to step 3. 3. Wipe the software and sensitive data from the failed DSC 8500. See Wiping the Software and
D Sensitive Data on page 156. NOTE: In case of serious hardware failure it might be impossible to wipe the software and sensitive data from the failed DSC 8500. 4. Label and disconnect all cables from the front of the failed DSC 8500. If only one site router is present and connected to port DSCn_Port2_Router port on the failed DSC 8500, communication with the site is lost after the cable is unplugged. 5. Perform one of the following actions: If you remove the DSC 8500 from an open rack, remove the four screws that hold the DSC 8500
in brackets to the rails by using a 3/8″ socket. If you remove the DSC 8500 from a cabinet, remove the four screws that hold the DSC 8500 in
brackets to the rails by using a T30 Torx screwdriver. 6. Partially remove the DSC 8500 and at the rear, remove the screw fastening the grounding cable to the
module by using a T30 Torx screwdriver. 7. Fully remove the DSC 8500 module.
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8. Partially insert the replacement DSC 8500 into position and at the rear, fasten the grounding cable to the DSC 85000 to 17 in-lbs by using a T30 Torx screwdriver.
9. Perform one of the following actions: If you insert the replacement DSC 8500 to an open rack, fasten the four screws that hold the DSC 8500 in brackets to the rails to 55 in-lbs by using a 3/8″ socket. If you insert the replacement DSC 8500 to a cabinet, fasten the four screws that hold the DSC 8500 in brackets to the rails to 55 in-lbs by using a T30 Torx screwdriver.
10. Reconnect all the cabling to the correct replacement DSC 8500 ports, as labeled in step 4.
10.5.1
Deploying the DSC 8500 Software After the DSC 8500 Replacement
IMPORTANT: Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action. The software upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed Software Upgrade on page 179. To avoid connectivity issues related to cabling the replacement DSC 8500 differently than the original, use the remaining DSC 8500 to disable MAC Port Lockdown on all ports of all DSC 8500s prior to connecting the replacement DSC 8500. After connecting the replacement DSC 8500, configure MAC Port lockdown for the
T desired ports. See Enabling/Disabling MAC Port Lockdown on the DSC 8500 on page 140.
Prerequisites: Obtain:
F Service laptop with On-Premises Software Hub installed. Ensure that service laptop is connected to any enabled DSC 8500 service port. If not, enable service port on one of the working DSC 8500s. See Configuring the DSC 8500 Switch on page 138.
A DSC 8500 installation media
IDs of the failed DSC 8500s MAC addresses of all replaced DSC 8500s
R Ensure that:
The latest version of On-Premises Software Hub is used.
D The software bundle deployed on the other DSC 8500s in the site is imported to On-Premises Software Hub. The replacement DSC 8500 was wiped. See Wiping the Software and Sensitive Data on page 156.
Procedure: 1. From the desktop, launch the On-Premises Software Hub application. 2. Import the DSC 8500 software bundle. See Importing the DSC 8500 Software Bundle on page 100. After the software bundle is imported, a success message appears in the right bottom corner.
3. Discover the site. See Discovering the Site on page 100. 4. Connect to the site. See Connecting to the Site on page 101. 5. Go to Device Management screen in the On-Premises Software Hub. 6. For the site where the DSC 8500 is replaced or wiped, from the Action drop-down list, select FRU
Replacement-DSC <DSC_ID>.
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7. In the FRU Replacement window, verify that software bundle version and site parameters are set correctly.
8. Set the DSC 8500 instance ID for the found MAC address of the new DSC 8500. IMPORTANT: It is required that the new DSC 8500 has the same ID as the replaced, failed DSC 8500.
9. Click Continue to start the installation process. Until the installation process for one site is complete, it is not possible to start the installation process for another site.
10. Wait for successful completion of Initial Deployment action on the replaced DSC 8500. 11. Verify security configuration. See Verifying the DBR M12 MultiCarrier Site Security Configuration on
page 143.
10.5.2
CInosntafilglautrioinng DSC 8500 After Disaster Recovery Software IMPORTANT: Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action.
The software upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed Software Upgrade on page 179.
T This procedure configures DSC 8500 after successful hardware replacement and software deployment.
If disaster recovery is required for more than one DSC 8500s in the site, this procedure should be done when
F all DSC 8500s are replaced and the software on them is deployed.
Prerequisites: Obtain:
A Service laptop or the Network Management (NM) Client
IP address or the host name of the DSC 8500. See Logon Information on page 106. Credentials for the System Infrastructure Administrator account
R Process: 1. Verify the DSC 8500 Trunking RF Site Security Configuration for each replaced DSC 8500. See D Verifying the DBR M12 MultiCarrier Site Security Configuration on page 143. 2. In Provisioning and Configuration Agent, discover the DSC 8500s. See Discovering the Hardware on page 140.
10.6
Replacing the Transceiver Module
IMPORTANT: Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action. The software upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed Software Upgrade on page 179.
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DRAFT Figure 99: Transceiver Card Cage
Prerequisites: Obtain: The replacement transceiver module T20 bit Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that
must be worn during the removal and installation of the DSC 8500 in the rack.
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Procedure: 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground. CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les composants soient endommagés par les décharges électrostatiques. 2. Locate the transceiver module that you want to replace. 3. In Provisioning and Configuration Agent (PCA), disable the XCVR by performing the following actions: a. Navigate to Services Requested States. b. In the Requested States view, expand the Transceiver node. c. Expand the node for the rack where the XCVR is installed. d. From the drop-down list next to the XCVR, select Disable. 4. Label and disconnect all cables from the ports on the transceiver. 5. To disengage the two captive screws on the front of the transceiver module, loosen them by using a T20 bit. 6. Grab the handle on the transceiver module and gently pull the transceiver module straight out along the guides on which it sits.
T 7. Slide in the replacement transceiver module along the guiding rails until it is engaged. A slight push may be necessary to securely engage the module in place. When the transceiver module is correctly engaged, the LEDs on the transceiver turn on. F IMPORTANT: If the transceiver module stops before it is engaged, it is in an incorrect position. It is either in the wrong slot or is rotated 180°. The module has a keying feature that prevents it from going all the way into an incorrect slot, or going into the correct slot but rotated 180°. Do not try to force the module.
A 8. To secure the transceiver module to the card cage, insert the two captive screws on the front of the transceiver and tighten them to 17 in-lbs by using a T20 bit. 9. Reconnect all cables to the appropriate ports on the transceiver.
R 10. In PCA, discover the new XCVR. See Discovering the Hardware on page 140.
11. In PCA, check the records of the XCVR by performing the following actions:
D a. Navigate to Services Event Monitoring.
b. In the Event Monitoring view, expand the Transceiver node.
10.7
Replacing the Power Amplifier
IMPORTANT: Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action. The software upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed Software Upgrade on page 179.
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Figure 100: Power Amplifier I/O Connections
FT Prerequisites:
Obtain:
A Replacement power amplifier (PA) module
T20 bit screwdriver Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that
must be worn throughout this procedure.
R Procedure: D 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground.
CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les composants soient endommagés par les décharges électrostatiques. 2. Perform one of the following actions: If the PA is non-operational, go to step 4. If the PA is operational, go to step 3. 3. In Provisioning and Configuration Agent (PCA), disable the PA by performing the following actions: a. Navigate to Services Requested States. b. In the Requested States view, expand the Power Amplifier node. c. Expand the node for the rack where the PA is installed. d. From the drop-down list next to the PA, select Disable. 4. Remove the 4 screws that secure the PA module in place by using a T20 bit screwdriver.
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5. Disconnect Ethernet cables. 6. Disconnect the power and the fan cable. 7. To allow for better reach to the RF connectors, partially remove the PA. 8. Remove Tx IN and Tx Out cables.
NOTE: Do not disconnect any of the cables from the N-Way splitter or combiners. WARNING: Wait for the PA module to cool down before attempting to remove it. AVERTISSEMENT: Attendez que le module de l’amplificateur de puissance (AP) refroidisse avant de tenter de le retirer. 9. Fully remove the PA module from the card cage. 10. Partially insert the replacement PA module so that the retainer lines are aligned with the guides in the card cage, leaving room to access the RF connectors. 11. Reconnect the Ethernet cables, the power cable and the fan cable to the replacement PA module. 12. Fully insert the replacement PA module into the card cage. 13. Secure the PA module to the chassis by fastening the four screws to 17 in-lbs with a T20 bit screwdriver. 14. In PCA, discover the new PA module. See Discovering the Hardware on page 140. 15. In PCA, check the records of the XCVR by performing the following actions:
T a. Navigate to Services Event Monitoring.
b. In the Event Monitoring view, expand the Power Amplifier node.
F 10.8 Replacing the SDite PrReseleActor You can replace the site preselector without shutting the power down.
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Figure 101: Site Preselector Filter (700/800)
FT Prerequisites:
Obtain: Replacement site preselector
A T20 bit screwdriver
3/8″ nut driver Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that
must be worn during the removal and installation of the site preselector.
R Procedure: D 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground.
CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les composants soient endommagés par les décharges électrostatiques. 2. Remove the site preselector from the rack by performing the following actions: a. Remove all cables from the site preselector. b. Remove the grounding cable from the site preselector by using the 3/8″ nut driver. c. Remove the two screws that secure the site preselector tray to the Radio System Distribution System (RFDS) card cage by using the T20 bit screwdriver. d. Remove the four screws on the bottom of the site preselector tray by using the T20 bit screwdriver. 3. Install the replacement site preselector by performing the following actions: a. Secure the replacement site preselector to the tray by using the 4 screws tightened with the T20 bit screwdriver.
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b. Insert the replacement site preselector tray so that the retainer lines are aligned with the notch in the card cage and tighten the two screws by using the T20 bit screwdriver.
c. Reconnect the grounding cable to the site preselector by using the 3/8″ nut driver. d. Reconnect all cables to the site preselector. 4. Ensure that the system is operating properly by checking the receiver sensitivity.
10.9
Replacing the Transmit Filter
WARNING: Shock hazard. The DBR M12 MultiCarrier Site contains dangerous voltages which can cause severe electrical shock or damage to equipment. You must disable power to the system before servicing the transmit filter. AVERTISSEMENT: Risque d’électrocution. Le site DBR M12 MultiCarrier contient des tensions dangereuses qui peuvent provoquer une décharge électrique grave ou des dommages à l’équipement. Vous devez couper l’alimentation du système avant l’entretien de cette pièce. IMPORTANT: Before you replace or remove the transmit filter, you must turn off the power to the site if the entire site is connected to the transmit filter that you want to replace or remove. Turning off the power to the site, causes any affiliated subscribers to relocate to another channel at an adjacent site. You must disable the site before powering down so the system does not attribute the loss of channel to a failure.
T Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action. The software
upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed Software Upgrade on page 179.
DRAF Figure 102: Site Transmit Filter
Prerequisites: Obtain: Replacement site transmit filter
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T20 bit screwdriver 3/8″ nut driver Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that
must be worn during the removal and installation of the transmit filter.
Procedure: 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground. CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. AVERTISSEMENT: Risque d’électrocution. Le site DBR M12 MultiCarrier contient des tensions dangereuses qui peuvent provoquer une décharge électrique grave ou des dommages à l’équipement. Vous devez couper l’alimentation du système avant l’entretien de cette pièce. 2. In Provisioning and Configuration Agent (PCA), disable all of the power amplifiers (PAs) associated with the PMU/Tx post filter by performing the following actions: a. Navigate to Services Requested States. b. In the Requested States view, expand the Power Amplifier node. c. Expand the node for the rack where the PA is installed. d. From the drop-down list next to the PA, select Disable.
T e. Repeat step 2d to be diabled.
3. Remove the site transmit filter from the rack, by performing the following actions: a. Remove all cables from the site transmit filter.
F b. Remove the grounding cable from the site transmit filter by using the 3/8″ nut driver.
c. Remove the two screws that secure the site transmit filter tray to the Radio System Distribution System (RFDS) card cage by using the T20 bit screwdriver.
A d. Remove the four screws on the bottom of the site transmit filter tray by using the T20 bit screwdriver. 4. Install the replacement site transmit filter by performing the following actions:
R a. Secure the replacement site transmit filter to the tray by using the four screws tightened with the T20 bit screwdriver. b. Insert the replacement site transmit filter tray so that the retainer lines are aligned with the notch in
D the card cage and tighten the two screws by using the T20 bit screwdriver.
c. Reconnect the grounding cable to the site transmit filter by using the 3/8″ nut driver. d. Reconnect all cables to the site transmit filter. 5. In PCA, discover the new PMU/Tx post filter. See Discovering the Hardware on page 140. 6. In PCA, check the Tx Bank records by performing the following actions: a. Navigate to Services Event Monitoring. b. In the Event Monitoring view, expand the Transmit Bank node. 7. In Provisioning and Configuration Agent (PCA), enable all of the power amplifiers (PAs) associated with the PMU/Tx post filter by performing the following actions: a. Navigate to Services Requested States. b. In the Requested States view, expand the Power Amplifier node. c. Expand the node for the rack where the PA is installed. d. From the drop-down list next to the PA, select Enable.
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e. Repeat step 7d to be enabled. 8. In PCA, validate the associated Tx Bank, Tx power capability by performing the following actions:
a. Navigate to Services RFDS Configuration. b. In the Transmit Path view, click Test.
10.10
Replacing the Phasing Harness (for Diplexer Function)
WARNING: Shock hazard. The DBR M12 MultiCarrier Site contains dangerous voltages which can cause severe electrical shock or damage to equipment. You must disable power to the system before servicing this part. AVERTISSEMENT: Risque d’électrocution. Le site DBR M12 MultiCarrier contient des tensions dangereuses qui peuvent provoquer une décharge électrique grave ou des dommages à l’équipement. Vous devez couper l’alimentation du système avant l’entretien de cette pièce.
IMPORTANT: Before you replace or remove the phasing harness, you must turn off the power to the site if the entire site is connected to the phasing harness that you want to replace or remove. Turning off the power to the site, causes any affiliated subscribers to relocate to another channel at an adjacent site. You must disable the site before powering down so the system does not attribute the loss of
T channel to a failure.
Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action. The software upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed Software Upgrade on page 179.
DRAF Figure 103: Phasing Harness
Prerequisites: Obtain:
Replacement phasing harness
Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that must be worn during the removal and installation of the phasing harness.
Procedure: 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground. CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les composants soient endommagés par les décharges électrostatiques.
2. In the Provisioning and Configuration Agent (PCA), disable all of the power amplifiers (PAs) by performing the following actions:
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a. Navigate to Services Requested States. b. In the Requested States view, expand the Power Amplifier node. c. Expand the node for the rack where the PA is installed. d. From the drop-down list next to the PA, select Disable. e. Repeat step 5d to be disabled. 3. Remove the phasing harness from the rack, by performing the following actions: a. Remove antenna cable. b. On the phasing harness, disconnect the connectors that connect to each post filter. 4. Install the replacement phasing harness by performing the following actions: a. On the phasing harness, connect the connectors that connect to each post filter
NOTE: You must install the replacement phasing harness in a way that the connectors labeled with a particular frequency band are connected to the appropriate post filters. b. Connect the antenna cable to the phasing harness. 5. In the Provisioning and Configuration Agent (PCA), enable all of the power amplifiers (PAs) by performing the following actions: a. Navigate to Services Requested States. b. In the Requested States view, expand the Power Amplifier node.
T c. Expand the node for the rack where the PA is installed.
d. From the drop-down list next to the PA, select Enable.
F e. Repeat step 5d for all PAs to be enabled.
6. In PCA, validate the associated Tx Bank, Tx power capability by performing the following actions: a. Navigate to Services RFDS Configuration.
DRA b. In the Transmit Path view, click Test.
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10.11
Replacing the N-Way Combiner
You can perform this procedure to replace the 2-3 N-Way combiner and the 4-6 N-Way combiner. The number of cables that you must disconnect and reconnect, varies between the 2-3 N-Way combiner and the 4-6 N-Way combiner.
WARNING: Shock hazard. The DBR M12 MultiCarrier Site contains dangerous voltages which can cause severe electrical shock or damage to equipment. You must disable power to the system before servicing this part. AVERTISSEMENT: Risque d’électrocution. Le site DBR M12 MultiCarrier contient des tensions dangereuses qui peuvent provoquer une décharge électrique grave ou des dommages à l’équipement. Vous devez couper l’alimentation du système avant l’entretien de cette pièce. IMPORTANT: Before you replace or remove the N-Way combiner, you must turn off the power to the site if the entire site is connected to the N-Way combiner that you want to replace or remove. Turning off the power to the site, causes any affiliated subscribers to relocate to another channel at an adjacent site. You must disable the site before powering down so the system does not attribute the loss of channel to a failure. If the DBR M12 MultiCarrier Site has more than one N-Way combiner, you do not need to power off the remaining N-Way Combiner and its associated power amplifiers (PAs). If the DBR M12 MultiCarrier Site has only one N-Way combiner, replacing it shuts down the entire rack. Do not perform this procedure if a DSC 8500 failed during the Software Upgrade action. The software
T upgrade must be recovered before starting this procedure. See Recovering the DSC 8500 Failed
Software Upgrade on page 179.
DRAF Figure 104: 2-3 N-Way Combiner
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Figure 105: 4-6 N-Way Combiner
Prerequisites: Obtain: Replacement N-Way combiner T20 bit screwdriver Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that
T must be worn during the removal and installation of the N-Way combiner.
Procedure: 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground.
F CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any
components. ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les
A composants soient endommagés par les décharges électrostatiques.
2. In the Provisioning and Configuration Agent (PCA), disable all of the power amplifiers (PAs) associated with the N-Way combiner that you want to replace by performing the following actions:
R a. Navigate to Services Requested States.
b. In the Requested States view, expand the Power Amplifier node. c. Expand the node for the rack where the PA is installed.
D d. From the drop-down list next to the PA, select Disable.
e. Repeat step 2d for all PAs to be disabled. 3. Remove the N-Way combiner from the rack by performing the following actions:
a. Label and disconnect all cables from the N-Way Combiner. You do not have to disconnect the other end of the cables from the power amplifier or the post filter.
b. In the corner of the N-Way combiner, remove the four screws by using a T20 bit srewdriver. 4. Install the replacement N-Way combiner by performing the following actions:
a. Secure the replacement N-Way combiner to the mounting bracket bu using the four screws tightened with a T20 bit screwdriver.
b. Reconnect all cables to the N-Way combiner. 5. In PCA, enable all of the PAs associated with the PMU/Tx post filter Bank by performing the following
actions:
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Procedure:
1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground.
CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les composants soient endommagés par les décharges électrostatiques.
2. Remove N-Way splitter from the power amplifier (PA) card cage by performing one of the following actions:

If…

Then…

If you want to remove the 2-3 NWay splitter,

perform the following actions:
a. Label and disconnect all cables attached to the 2-3 N-Way splitter to be replaced.

b. Note down the location of the shrouded header.

FT If you want to remove the 4-6 NDRA Way splitter,

c. Remove the RF jumper cable and the jumper in the shrouded header.
d. Remove the screw that secures the board to the card cage by using a T20 bit screwdriver.
e. Remove the 2-3 N-Way splitter board from the snap-in standoffs. Removing the splitter board may require some manual force to unseat.
perform the following actions:
a. Label and disconnect all cables attached to the 4-6 N-Way splitter to be replaced.
b. Remove the screw that secures the board to the card cage by using a T20 bit screwdriver.
c. Remove the 4-6 N-Way splitter board from the snap-in standoffs. Removing the splitter board may require some manual force to unseat.

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3. Install the N-Way combiner in the power amplifier (PA) card cage by performing one of the following actions:

If…

Then…

If you want to install the 2-3 N-Way splitter,

perform the following actions:
a. Place the replacement 2-3 N-Way splitter into the location of the removed one, and snap it into place.

b. Secure the screw that secures the board to the card cage by using a T20 bit screwdriver.

c. Reconnect the RF jumper cable and the jumper in the shrouded header.

d. Reconnect the remaining cables to the 2-3 N-Way splitter.

e. Configure the 2-pin jumper, see N-Way Splitter Physi-

If you want to install the 4-6 N-Way
T splitter,

cal Description on page 36.
perform the following actions:
a. Place the replacement 4-6 N-Way splitter into the location of the removed one, and snap it into place.
b. Secure the screw that secures the board to the card cage by using a T20 bit screwdriver.
c. Reconnect all the cables to the 4-6 N-Way splitter.

F 10.13

Replacing the RMC ModulAes You can perform this procedure to replace the individual Site Receive Multi-Coupler (RMC) or Cabinet RMC. DR Figure 108: RMC Cage for Site RMC and Cabinet RMC Fully Populated

For each preselector in the rack, there is one Site RMC. For each Site RMC there is one Cabinet RMC per six or fewer transceiver modules. In case seven or more transceiver modules in the rack, there are two Cabinet RMCs. Each Site RMC and its Cabinet RMCs are an independent receive branch. If service is required on a particular RMC in one branch, the other branch does not have to be disturbed. For more information on how to disable one branch for servicing purposes, see Replacing the Site Preselector on page 197. Prerequisites:
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Obtain:
Replacement RMC module
T20 bit screwdriver
Electrostatic discharge (ESD) wrist strap (Motorola Solutions part number RSX4015A, or equivalent) that must be worn during the removal and installation of the RMC Modules.
Procedure: 1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground. CAUTION: Wear the ESD strap throughout the whole procedure to prevent ESD damage to any components. ATTENTION: Portez la dragonne ESD tout au long de la procédure pour éviter que les composants soient endommagés par les décharges électrostatiques.
2. Perform one of the following actions:

If… If you want to replace the Site RMC,
RAFT If you want to replace the Cabinet D RMC,

Then…
perform the following actions:
a. Note down how the RF cables are connected to the RMC module.
b. Note down the position of the DIP switch gain setting.
c. Disconnect the RF cables from the RMC module. d. Remove the two screws that secure the RMC mod-
ule by using the T20 bit screwdriver
e. Slide the RMC module out of the rack. f. Install the replacement RMC module by tightening
the two screws that secure the RMC module to 17 in-lbs with the T20 bit screwdriver.
g. Reconnect all the cables to the RMC module. h. Ensure that the DIP switch settings are correct.
perform the following actions:
a. Note down how the RF cables are connected to the

RMC module.

b. Disconnect the RF cables from the RMC module.

c. Remove the two screws that secure the RMC module by using the T20 bit screwdriver

d. Slide the RMC module out of the rack.

e. Install the replacement RMC module by tightening the 2 screws that secure the RMC module to 17
in-lbs with the T20 bit screwdriver.

f. Reconnect all the cables to the RMC module.

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DBR M12 MultiCarrier Site Installation

This chapter details installation procedures relating to the DBR M12 MultiCarrier Site.
3.1
Pre-Installation Tasks
Before installing the DBR M12 MultiCarrier Site, you must obtain the following:
● Appropriate cables
● On-Premises Software Hub (OPSH)
● Provisioning and Configuration Agent (PCA)
● Unified Network Configurator (UNC)
● IP and Domain Name Service (DNS) information
● Appropriate credentials
3.1.1
Preparing the Equipment for Installation
Process:
1. Prepare the site to comply with the Motorola Solutions requirements and specifications for the
equipment, as listed in the Motorola Solutions Standards and Guidelines for Communication Sites
manual. The base radio may be installed in a suitable, restricted access, indoor enclosure in any
location suitable for electronic communications equipment. Other codes and guidelines that may apply
to the location must also be met. See General Safety Precautions on page 65.
2. Inspect and inventory all racks, cabinets, cables, and other equipment with a Motorola Solutions
representative to ensure that the order is complete. See General Installation Standards and
Guidelines on page 72.
3. Various tools are used to install and service the equipment. If information is needed regarding where
to obtain any of the equipment and tools listed, contact the Centralized Managed Support Operations
(CMSO). For a list of general recommended tools for installing and servicing the hardware, see
Installation/Troubleshooting Tools on page 78.
4. Install all equipment by using the site drawings and other documents provided by the Field Engineer.
Use the installation standards and guidelines for placing and installing equipment.
5. Properly ground all the racks and cabinets to protect against ground faults, electrical surges, and
lightning.
6. Connect all necessary cables within a rack and between the racks for system interconnection.
7. Run a preliminary check of a site before applying power.
8. For a list of items you need access to before installing the software, see Installation/Troubleshooting
Tools on page 78.

General Safety Precautions

FCC/ISED Compliance Guidelines
WARNING: Compliance with FCC/ISED guidelines for human exposure to Electromagnetic Energy
(EME) at Transmitter Antenna sites generally requires that personnel working at a site must be aware of
the potential for exposure to EME, and can exercise control of exposure by appropriate means, such as
adhering to warning sign instructions, using standard operating procedures (work practices), wearing
personal protective equipment, or limiting the duration of exposure. For more details and specific
guidelines, see “Appendix A: Electromagnetic Energy Information” of the Motorola Solutions Standards
and Guidelines for Communication Sites manual.
AVERTISSEMENT: Les directives de la FCC/ISDÉ en matière d’exposition humaine à l’énergie
électromagnétique à proximité des antennes émettrices exigent en général que les personnes qui
travaillent sur de tels sites soient conscientes du risque d’être exposées à l’énergie électromagnétique
et de la possibilité de contrôler les risques d’exposition en respectant strictement les instructions
figurant sur les panneaux d’avertissement, en se reportant aux procédures opérationnelles standard
(pratiques de travail), en portant un équipement de protection individuelle ou en limitant le temps
d’exposition. Pour plus de détails et des lignes directrices précises, consultez l’« Annexe A :
Renseignements sur l’énergie électromagnétique » du manuel des normes et lignes directives relatives
aux sites de communications de Motorola Solutions Standards and Guidelines for Communication
Sites.
Notice to Users (Innovation, Science and Economic Development Canada Canada)
The operation of your Motorola Solutions radio is subject to the Radiocommunications Act and must comply
with rules and regulations of the Federal Government’s department of Industry Canada. Industry Canada
requires that all operators using Private Land Mobile frequencies obtain a radio license before operating their
equipment.
Installation guidelines for compliance with RF exposure regulations
This equipment must be installed and operated at a fixed location, in compliance with all applicable code
requirements. The antenna installation must comply with all applicable building and safety codes. In order
to ensure optimal communication performance and compliance with applicable RF exposure limits, it is
recommended that the antenna is installed outside the building hosting this equipment, on the roof or on a
tower if at all possible.
It is the licensee or site owner responsibility to establish an RF exposure safety program meeting the
applicable regulatory requirements concerning RF exposure of working personnel and the general public,
implementing actions such as site survey measurements and computational analysis, signage and barriers,
site access restrictions, as needed.
Declaration of Compliance for the Use of Distress and Safety Frequencies
The radio equipment does not employ a modulation other than the internationally adopted modulation for
maritime use when it operates on the distress and safety frequencies specified in RSS-182 Section 7.3.
General safety precautions during all phases of operation, service, and repair
Observe the following general safety precautions during all phases of operation, service, and repair of the
equipment described in this manual. Follow the safety precautions listed and all other warnings and cautions
necessary for the safe operation of all equipment.

Due to the danger of introducing additional hazards, do not install substitute parts or perform any
unauthorized modifications of equipment.
NOTE: The installation process requires preparation and knowledge of the site before installation
begins. Review installation procedures and precautions in the Motorola Solutions Standards and
Guidelines for Communication Sites manual before performing any site or component installation.
Always follow all applicable safety procedures, such as Occupational Safety and Health Administration
(OSHA) requirements, National Electrical Code (NEC) requirements, local code requirements, and safe
working practices. Also, all personnel must practice good judgment. General safety precautions include the
following:
● Read and follow all warning notices and instructions marked on the product or included in this manual
before installing, servicing, or operating the equipment. Retain these safety instructions for future
reference.
● If troubleshooting the equipment while power is on, be aware of the live circuits.
● Do not operate the radio transmitters unless all RF connectors are secure and all connectors are properly
terminated.
● Ground all equipment properly in accordance with the Motorola Solutions Standards and Guidelines for
Communication Sites manual and specified installation instructions for safe operation.
● Slots and openings in the cabinet are provided for ventilation. Do not block or cover openings that protect
the devices from overheating.
● Only a qualified technician familiar with similar electronic equipment should service equipment.
● Some equipment components can become hot during operation. Turn off all power to the equipment and
wait until sufficiently cool before touching.
● Maintain emergency first aid kits at the site.
● Direct personnel to call in with their travel routes to help ensure their safety while traveling between
remote sites.
● Institute a communications routine during certain higher risk procedures where the on-site technician
continually updates management or safety personnel of the progress so that help can be dispatched if
needed.
● Never store combustible materials in or near equipment racks. The combination of combustible material,
heat, and electrical energy increases the risk of a fire safety hazard.
● Equipment installed at the site meeting the requirements of a “restricted access location,” per UL
62368-1, is defined as follows: “Access can only be gained by service persons. Access to the equipment
is by using a tool or lock and key, or other means of security, and is controlled by the authority
responsible for the location.”
BURN HAZARD: The metal housing of the product may become extremely hot. Use caution when
working around the equipment.

Figure 41: Warning Label on Hot Modules
WARNING: DC input voltage must be no higher than 60 VDC. This maximum voltage includes
consideration of the battery charging “float voltage” associated with the intended supply system,
regardless of the marked power rating of the equipment. Failure to follow this guideline may result in
electric shock.
AVERTISSEMENT: La tension d’entrée CC ne doit pas être supérieure à 60 V CC. Cette tension
maximale tient compte de la « tension flottante » de charge de la batterie associée au système
d’alimentation prévu, quelle que soit la puissance nominale indiquée sur l’équipement. Le non-respect
de cette directive peut entraîner une décharge électrique.
BURN HAZARD: Disconnect power in the cabinet to prevent injury while disconnecting and connecting
antennas.
CAUTION:
All Tx and Rx RF cables outer shields must be grounded per Motorola Solutions Standards and
Guidelines for Communication Sites manual requirements.
All Tx and Rx RF cables must be connected to a surge protection device according to the Motorola
Solutions Standards and Guidelines for Communication Sites manual. Do not connect Tx and Rx RF
cables directly to an outside antenna.
AVERTISSEMENT: Tous les blindages extérieurs des câbles RF d’émission et de réception doivent être
mis à la terre conformément au manuel des normes et lignes directives relatives aux sites de
communications de Motorola Solutions. Tous les câbles RF d’émission et de réception doivent être
connectés à un dispositif de protection contre les surtensions conformément au manuel des normes et
lignes directives relatives aux sites de communications de Motorola Solutions (Standards and
Guidelines for Communication Sites). Ne connectez pas les câbles RF d’émission et de réception
directement sur une antenne extérieure.
IMPORTANT: All equipment must be serviced by Motorola Solutions-trained personnel.
3.2.1
RF Site Devices Supplemental Safety Installation
Requirements
The Supplemental Safety and Installation Requirements include the following:
● The RF site device must be installed in a suitable, in-building enclosure. A restricted access location is
required when installing this equipment into the end system.
● The device can be outfitted with a Class 1 power supply component. This component is equipped with an
appliance inlet for connecting to an AC input.
● This device contains a distributed DC power system with DC input terminals that meet SELV DC circuit
requirements.
● When installing the equipment, all requirements of relevant standards and local electrical codes must be
fulfilled.
● The maximum operating ambient temperature of this equipment is 60 °C. The maximum operating
altitude is 5000 meters above sea level.
The maximum altitude for full performance of the optionally installed router is 3000 meters above sea
level.

For more information, see Specifications for DBR M12 MultiCarrier Site for Integrated Voice and Data
(700/800 MHz) on page 48.
● The 48 VDC system output to the Multi-Carrier Power Amplifier (MCPA) and DSC 8500 is at an energy
hazard level (exceeds 240 VA). When installing into the end system, care must be taken so as not to
touch the output wires.
● When the device is used in a DC system, the DC power supply must be located in the same building as
the device, and it must meet the requirements of a SELV circuit.
3.2.2
DC Mains Grounding Connections
CAUTION: This equipment is designed to permit the connection of the grounded conductor of the DC
supply circuit to the grounding conductor at the equipment. If this connection is made, you must meet all
following conditions:
● Connect this equipment directly to the DC supply system grounding electrode conductor or to a
bonding jumper from a grounding terminal bar or bus in which the DC supply system grounding
electrode conductor is connected.
● Locate this equipment in the same immediate area (such as adjacent cabinets) as any other
equipment that has a connection between the grounded conductor of the same DC supply circuit
and the grounding conductor (and also the point of grounding of the DC system). Do not ground the
DC system elsewhere.
● Locate the DC supply source within the same premises as the equipment.
● Do not install switching or disconnecting devices in the grounded circuit conductor between the DC
source and the point of connection of the grounding electrode conductor.
AVERTISSEMENT: Cet équipement est conçu pour permettre la connexion du conducteur de terre du
circuit d’alimentation CC au conducteur de terre de l’équipement. Si cette connexion est établie, vous
devez respecter toutes les conditions suivantes :
● Connectez cet équipement directement au conducteur de l’électrode de terre du système
d’alimentation CC ou à un cavalier de liaison à partir d’un bornier ou d’un bus de terre auquel le
conducteur d’électrode de terre du système d’alimentation CC est connecté.
● Placez cet équipement dans la même zone immédiate (comme dans des armoires adjacentes) que
tout autre équipement doté d’une connexion entre le conducteur de terre du même circuit
d’alimentation CC et le conducteur de terre (et également le point de mise à la terre du système
CC). Ne mettez le circuit CC à la terre à aucun autre endroit.
● Localisez la source d’alimentation CC dans les mêmes locaux que l’équipement.
● N’installez pas de dispositifs de commutation ou de déconnexion dans le conducteur de terre entre
la source d’alimentation CC et le point de connexion du conducteur d’électrode de terre.
3.2.2.1
Disconnect Device Permanently Connected
Incorporate a readily accessible disconnect device (circuit breaker or switch) in the building installation wiring.

3.2.2.2
Multiple Power Sources
WARNING: Disconnect all Power before servicing. Multiple power sources may be present. Failure to
do so may cause property damage, personal injury or death.
AVERTISSEMENT: Débranchez toute alimentation avant l’entretien. Plusieurs sources d’alimentation
peuvent être présentes. Ne pas le faire peut entraîner des dommages matériels, des blessures ou la
mort.
3.2.2.3
Connection to Primary Power
For supply connections, use wires suitable for at least 75 °C.
3.2.2.4
Replaceable Batteries
WARNING: Risk of Explosion if you replace the battery with an incorrect type. Dispose of used batteries
according to the instructions.
3.2.3
Rack Transportation Strap Bar
Figure 42: Rack Transportation Strap Location

If you transport the rack on a hand truck or dolly, you should use the rack strap bar as the location for securing the straps.

You must remove the rack strap bar after the rack is transported to the site. There are six M6 screws that
attach the bar to the rack brackets. The six M6 screws can be removed with a driver with a T30 bit. You
cannot remove the brackets that the rack strap bar is attached to, they are used for cable management.
WARNING: When securing the rack by using the strap bar do not tilt the rack forward or side to side
more than 15 degrees.
AVERTISSEMENT: Lorsque vous fixez un bâti à l’aide de la barre de sangle, n’inclinez pas le bâti vers
l’avant ou d’un côté à l’autre à plus de 15 degrés d’inclinaison.
3.2.4
Maintenance Requiring Two People
Identify maintenance actions that require two people to perform the repair. Two people are required when:
● A repair has the risk of injury that would require one person to perform first aid or call for emergency
support. An example is work around high-voltage sources. If an accident occurs to one person, another
person may be required to remove power and call for emergency aid.
● Heavy lifting is involved. Use the National Institute of Occupational Safety and Health (NIOSH) lifting
equation to determine whether one or two persons are required to lift a system component when it must
be removed and replaced in its rack.
3.2.5
Equipment Racks
Lift equipment racks without the use of lifting equipment only when sufficient personnel are available
to ensure that regulations covering health and safety are not breached. Use an appropriately powered
mechanical lifting apparatus for moving and lifting the equipment racks. In addition to these points, comply
with any local regulations that govern the use of lifting equipment.
WARNING: Crush Hazard could result in death, personal injury, or equipment damage. Equipment
racks can weigh up to 360 kg (800 lb).
AVERTISSEMENT: Le risque d’écrasement peut entraîner la mort, des blessures ou des dommages
matériels. Les bâtis d’équipement peuvent peser jusqu’à 360 kg (800 lb).
3.2.5.1
Lifting Equipment Racks Horizontally
In some cases, equipment racks are shipped in the horizontal position. Use the appropriate lifting apparatus
to lift the racks upright. Comply with all applicable health and safety regulations, and any other regulations
applicable to lifting heavy equipment.
WARNING: Crush Hazard could result in death, personal injury, or equipment damage.
Do not use the eyenuts mounted on the top of the rack to lift the rack upright from a horizontal position.
The eyenuts are not designed to lift horizontally and could fail resulting in damage to the equipment or
injury to personnel.
AVERTISSEMENT: Le risque d’écrasement peut entraîner la mort, des blessures ou des dommages
matériels. N’utilisez pas les écrous à œil montés sur le dessus du bâti pour soulever le bâti à la
verticale depuis une position horizontale. Les écrous à œil ne sont pas conçus pour lever un objet
horizontalement et pourraient se briser, entraînant des dommages à l’équipement ou des blessures au
personnel.

3.2.5.2
Lifting Equipment Racks Vertically
Some equipment racks have four M10 eyenuts mounted in the top of the rack. Use these eyenuts to lift the
equipment rack vertically. Before using these eyenuts, visually check them and the rack hardware for any
damage that may have occurred during shipping.
WARNING: Do not use the eyenuts if damage is apparent. Contact the Centralized Managed Support
Operations (CMSO) for replacements.
AVERTISSEMENT: N’utilisez pas les écrous à œil si des dommages sont apparents. Communiquez
avec le Centre des opérations de soutien centralisé Centralized Managed Support Operations (CMSO)
pour les remplacements.
Use all four eyenuts when lifting the equipment rack. The minimum distance from each eyenut to the lifting
point is 1.2 meters (47.2 in). Using a shorter length than specified could cause the eyenuts to fail. The figure
below shows the minimum lengths and proper lifting angles using the eyenuts.
Figure 43: Lengths and Angles for Lifting Using the Eyenuts

If eyenuts are removed or become loose, install them properly before lifting the equipment rack. Tighten the
eyenuts and bolt assembly by hand. Correct eyenut tightness and alignment are crucial to ensure that the
eyenut assembly performs to its intended lifting capacity. Align the eyenuts to point towards the center lifting
point of the cabinet and tightened to between 90 to 120 in-lb torque.
The figure below shows the proper alignment of the eyenuts.

Figure 44: Proper Alignment of the Eyenuts

General Installation Standards and Guidelines

This section provides several guidelines to ensure a quality install. Review these guidelines before unpacking
and installing the system. Additionally, review the installation information in the Motorola Solutions Standards
and Guidelines for Communication Sites manual for more details, including:
● Equipment installation
● Antenna installation
Review the installation information specific for the DBR M12 MultiCarrier Site. See DBR M12 MultiCarrier Site
Installation on page 64.
3.3.1
Site Preparation Overview
Perform the activities listed in this table to ensure proper site preparation. The table references specific
chapters in the Motorola Solutions Standards and Guidelines for Communication Sites manual for more
information.
Table 17: Activities for Site Preparation
Activity Description of Activity Chapter Reference
Review the site plan. ● Prevents potential on-site
and off-site interference by
local trunked systems.
● Minimizes cable lengths.
● Determines the location of
telecom equipment.
● “Site Design and Development”

3.3.2
Equipment Inspection and Inventory Recommendations
Ensure to fulfill the following general equipment inspection and inventory recommendations:
● Take an inventory of all equipment with a Motorola Solutions representative to ensure that the order is
complete.
● Carefully inspect all equipment and accessories to verify that they are in good condition.
● Promptly report any damaged or missing items to a Motorola Solutions representative.
CAUTION: Do not tamper with factory configuration settings for these devices. These settings include
software configuration, firmware release, password, and physical connections. Motorola Solutions has
configured and connected these devices to meet specific performance requirements. Tampering with
these devices may result in unpredictable system performance or catastrophic failure.
3.3.3
Placement and Spacing Recommendations
Proper spacing of equipment is essential for ease of maintenance and safety of personnel. Spacing
requirements have been established to meet the National Fire Protection Associations (NFPA) code, and the
American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) standards. Adhere to any local regulations that apply to the installation.
RISK OF FIRE: Install only on concrete or other non-combustible surface.
RISQUE D’INCENDIE: Installer uniquement sur du béton ou toute autre surface non combustible.
Placing Equipment Recommendations
● Place each rack on a firm, level, and stable surface, and bolt the racks together.
● Use the proper mounting hardware and shims to prevent rack movement. See the Standards and
Guidelines for Communication Sites manual.
● Use strain relief when installing and positioning cables and cords to help ensure that no interruption of
service occurs.
● Provide an appropriate amount of space around all components to allow for proper air flow, cooling, and
safe access to equipment.
● Locate the site racks and other equipment with enough spacing to allow access for service.
● Locate the system in an area free of dust, smoke, and electrostatic discharge (ESD).
● Equipment that is not part of the defined product configurations should not be added to the rack.
Extraneous hardware may compromise thermal performance by raising the temperature or impeding
airflow.
● External cables coming into the racks must not significantly reduce airflow.
● For grounding racks information, see the Standards and Guidelines for Communication Sites manual.
Detailed Spacing Recommendations
Cabinets and racks allow equipment to be added to a site. Always consider room for expansion when setting
up a site. Cabinets or racks may be installed next to each other or to other equipment. However, provide all
cabinets and racks with sufficient floor space to permit access for installation and service.
Front access:
● At least 2 ft floor access in front of the cabinet or rack.
Side and rear access:
● At least 2 ft floor access at the rear of the cabinet or rack.
● At least 2 ft access on at least one side of the cabinet or rack, plus 6 inches at the rear of the cabinet or
rack.
For details on space requirements, see the Standards and Guidelines for Communication Sites manual.
3.3.4
Cabinet Bracing Recommendations
Use all supplied bracing hardware when installing a rack or cabinet, and secure all equipment within a rack or
cabinet.
If additional equipment is installed, see the system design document the field engineer provided, or consult
the Motorola Solutions Field Representative.
Subsystem cabinets are self-supporting structures. In areas subject to seismic activity, additional bracing
of the cabinet may be required to prevent it from tipping. However, the bracing hardware must be locally
procured. No specific procedures are provided within this manual for bracing cabinets in active seismic areas.
See the Motorola Solutions Standards and Guidelines for Communication Sites manual for details on seismic
conditions.

Mounting Cabinets or Racks to a Floor

Perform the following steps to properly install a cabinet or open rack within a site building. Secure the
cabinets and racks to the floor for optimum stability. This procedure is written so that the cabinet or rack is
moved only once.
Procedure:
1. Carefully mark the mounting holes with a pencil, as indicated on the appropriate cabinet or rack
footprint.
2. Drill the marked mounting holes to the appropriate depth of the mounting hardware with a hammer drill
and bit.
3. Insert an anchor into the drilled hole. If necessary, tap the anchor into place using a hammer.
4. For cabinets, adjust leveling feet until the mounting plate solidly touches the floor.
5. Carefully move the cabinet or rack into the position indicated by the holes in the floor.
WARNING: Equipment cabinets and racks are heavy and may tip. Use extreme caution when
moving. Lift from top eyenuts with the appropriate apparatus, or secure the cabinet or rack from
tipping if lifting from the bottom. Failure to do so could result in death or serious injury or
equipment damage.
AVERTISSEMENT: Les armoires et les bâtis d’équipement sont lourds et peuvent basculer.
Soyez extrêmement prudent lorsque vous les déplacez. Soulevez-les à partir des écrous à œil
supérieurs avec l’appareil approprié ou prévenez le basculement de l’armoire ou du bâti si vous
le soulevez par le bas. Ne pas le faire pourrait entraîner la mort, des blessures graves ou des
dommages matériels.
6. Adjust and level the cabinet or rack as necessary to position the cabinet mounting holes with the
pre-drilled holes.
7. Secure the cabinet or rack to the site floor with the locally procured mounting hardware.
IMPORTANT: If securing a rack to a concrete floor, use 1/2-inch grade 8 bolts with anchors, for
a cabinet use 5/16-inch grade 8 bolts with anchors.
8. For cabinets, adjust leveling feet until they touch the mounting surface.
3.3.6
Bonding and Grounding Requirements
Cabinets and racks include a Rack Grounding Bar (RGB) with the capacity to terminate numerous ground
wires, which are associated with internal metallic or fiber optic cables and external grounding to power
company equipment.
Attach equipment added to the cabinet or rack to the ground bar using solid or stranded 6 AWG copper wire.
The RGB uses dual-hole lugs to terminate ground wires. The minimum number of dual-hole attachments
is system-dependent and specified by your organization. This bar provides electrical continuity between all
bonds and ground wire with a current-carrying capacity equal to or exceeding that of a 6 AWG copper wire.
See the Motorola Solutions Standards and Guidelines for Communication Sites manual for more information
on proper bonding and ground at a site.

Cabling Requirements
Diagrams for cabling are typically included in the system-specific configuration documentation Motorola
Solutions provides.
Also see the Motorola Solutions Standards and Guidelines for Communication Sites manual for cabling
standards.
IMPORTANT: System certification was completed using shielded cables. To prevent emission
problems, use only shielded cables. Do not substitute other cable types.
● Position the equipment to avoid excessive tension on cables and connectors. Cables must be loose with
absolutely no stress on the connectors. Careful cable routing and securing the cables with tie wraps (or
other devices) is one way to provide this protection. Set up preventive maintenance loops.
● Dress the cables neatly using cable ties. Do not tighten the cable ties until you are sure that the required
service length and bend radius requirements are met. Leave cable ties loose enough to allow adjustment.
● Verify that all cables are properly labeled to match system-specific configuration documentation Motorola
Solutions provided.
● Ensure that cables do not exceed the minimum bend radius as outlined in the Motorola Solutions manual
for cabling standards.
CAUTION: Use only Category 5e Shielded Twisted Pair (or higher) for cabling Ethernet connections.
Motorola Solutions has engineered this system to meet specific performance requirements. Using other
cabling and connectors may result in unpredictable system performance or catastrophic failure.
AVERTISSEMENT: Utilisez uniquement une paire torsadée blindée de catégorie 5e (ou supérieure)
pour le câblage des connexions Ethernet. Motorola Solutions a conçu ce système pour répondre à des
exigences de rendement particulières. Utiliser d’autres câblages et connecteurs peut entraîner une
performance imprévisible du système ou une panne catastrophique.
For more information on cabling guidelines, see the documentation supplied with components from each
equipment manufacturer.
3.3.8
Power Guidelines and Requirements
For information on providing electrical service, power budgeting, selecting batteries, and other topics for
supplying power at the site, see the Motorola Solutions Standards and Guidelines for Communication Sites
manual.
Perform electrical installation work in accordance with the current edition of the NFPA 70 and local building
codes. Where required, use a qualified and licensed electrician for all electrical installations.
NOTE: In the event of a power supply failure, the AUX BUS connection configuration prevents
transceivers in the chassis with the failed power supply from going offline. When the failed Power
Supply is replaced, the lower transceiver card in the chassis resets automatically. The reset is needed
for the transceiver to recognize the new Power Supply. Similarly, if the AC and/or DC input to the Power
Supply is removed and then reconnected, the same reset scenario occurs.
3.3.8.1
AC Power Guidelines and Requirements
The Motorola Solutions Standards and Guidelines for Communication Sites manual defines the guidelines
and requirements for cabinets and racks which house equipment that requires AC power input.
Some of the guidelines and requirements are as follows:

● The cabinet or rack is designed to accept 120/240 V, single-phase power with an amperage service size
as required by the electronic equipment.
● Cabinets and racks powered by commercial power must be equipped with a Nationally Recognized Test
Laboratory (NRTL) certified power distribution module that contains a main circuit breaker, or individual
circuit breakers of the correct size as required for the electronic equipment, or as specified by your
organization.
● A decal showing an electrical schematic of the power wiring is affixed to the inside surface of the cabinet.
● All AC power equipment and electrical components must conform to National Electrical Manufacturers
Association (NEMA) and National Electrical Code (NEC). The AC power equipment must also be listed by
an NRTL.
● A surge arrestor, designed to protect equipment systems from a 120/240 V service and load center, is
placed on the power feed ahead of all individual load center circuit breakers. This gapless arrestor must
be listed by an NRTL for the purpose intended.
● Selection of a surge arrestor is based on the susceptibility of the equipment powered by the electrical
service, with margin provided for locally generated disturbances. See ANSI/IEEE C62.41 (21) for more
details.
● At least one 120 VAC, 15 A duplex convenience outlet equipped with Ground Fault Interrupter (GFI)
protection must be provided in the electronic equipment compartment.
CAUTION: Do not use surge/transient suppressors without careful and expert power system analysis.
AVERTISSEMENT: N’utilisez pas de suppresseurs de surtensions/surtensions transitoires sans faire
faire une analyse minutieuse du système d’alimentation par un expert.
TIP: Redundant devices could be terminated on different AC main phases so that a single phase failure
does not result in a power loss for both devices.
3.3.9
Electrostatic Discharge Recommendations
Electronic components, such as circuit boards and memory modules, can be sensitive to Electrostatic
Discharge (ESD).
Use an antistatic wrist strap and a conductive foam pad when installing or upgrading the system.
If an ESD station is not available, wear an antistatic wrist strap. Wrap the strap around the wrist and attach
the ground end (usually a piece of copper foil or an alligator clip) to an electrical ground. An electrical ground
can be a piece of metal that literally runs into the ground (such as an unpainted metal pipe), or the metal part
of a grounded electrical appliance. An appliance is grounded if it has a three-prong plug and is plugged into a
three-prong grounded outlet.
NOTE: Do not use a computer as a ground, because it is not plugged in during installation.
3.3.10
FCC Requirements
Radio frequency (RF) transmitters installed at sites within the US must be in compliance with the following
FCC regulations:
● The station licensee is responsible for the proper operation of the station at all times and is expected
to provide observations, servicing, and maintenance as often as may be necessary to ensure proper
operation.
● The transmitter ERP must not exceed the maximum power specified on the current station authorization.

Junction Panel Connections

The junction panel for the DBR M12 MultiCarrier Site cabinet/rack provides locations for all the non-RF
connections to external devices. Cables provided by Motorola Solutions include the specific connectors for
the junction panel on one end and the subsystem equipment on the other end.
NOTE: All RF connections to the DBR M12 MultiCarrier Site cabinet/rack are facilitated directly at the
RF connectors of the Tx post filter(s), Preselctor(s) and RMC.

Figure 47: Cabinet Junction Panel

Figure 48: Rack Junction Panel Network Connections

Documents / Resources

Motorola Solutions DBR M12 MultiCarrier Site [pdf] User Guide
89FT5911, ABZ89FT5911, DBR M12 MultiCarrier Site, DBR M12, MultiCarrier Site, Site

References

User Manual

Motorola Solutions DBR M12 MultiCarrier Site

Specifications

Product Usage Instructions

FAQs

DBR M12 MultiCarrier Site Installation

General Safety Precautions

General Installation Standards and Guidelines

Mounting Cabinets or Racks to a Floor

Junction Panel Connections

Documents / Resources

References

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