Comba COMFLEX NG MRU Medium Power Remote Unit
The information contained herein is confidential and the property of Comba and is supplied without liability for errors or omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.
Document History
| Page No. | Version | Revised By | Details of Change |
| n/a | 1-0-0 | HaiLong Deng | First Release |
List of Abbreviations
| Abbreviation | Meaning |
| AC | Alternating Current |
| DC | Direct Current |
| ANT | Antenna |
| CLI | Command-Line Interface |
| GUI | Graphical User Interface |
| LED | Light-Emitting Diode |
| LMT | Local Maintenance Terminal |
| LTE | Long Term Evolution |
| NR | New Radio |
| PSU | Power Supply Unit |
| RF | Radio Frequency |
| Rx | Receive |
| Tx | Transmit |
| UL | Uplink |
| DL | Downlink |
OVERVIEW
The ComFlex NG DAS system is an analog digital combination system that supports both wireless and direct access methods, and supports 4G and 5G standards. The wireless access method amplifies the RF signal by selecting the corresponding frequency band of the operator through digital signal processing, while the direct access method attenuates the RF signal through POI modules to ensure compatibility between the wireless and wired access sources. MU also converts radio frequency signals into optical signals, which are pulled far to the remote RU through optical fibers. RU amplifies the signal again and covers the network through Passive DAS.
APPEARANCE
The following figures shows the appearance of the Medium Power Remote.
NETWORK ARCHITECTURE
Following is the typical network architecture of ComFlex NG series Distributed Antenna System, Medium Power Remote is connected with the MU by optical fiber cable. The RF output of the RU is connected to antenna by RF cables. The MU and RU are powered by PSU in the equipment room or outdoor PSU.
PHYSICAL PORTS AND INDICATION
Table 1 Ports at bottom side
| Port | Connecter | Description |
| EXT filter | SMA | Connected ext 700/850MHz filter |
| OP | SC-APC | Connected optical fiber form MU |
| GND | M6 bolt | Connected GND wire |
| ANT test | SMA | Use for ANT port signal test |
| ANT | DIN4.3-10 | Connected antenna |
| FAN | 8pin-circle | Connected FAN unit |
| Debug | RJ45 | Ethernet interface for LMT |
| Power supply | 4pin-circle | Connected power supply |
| LED Lable | Status | Description |
|
PWR |
Solid Green | Unit is powered ON and Operational |
| Flashing Green | Unit is powered on and NOT Operational | |
| Off | Unit is not powered | |
|
ALM |
Green | RU is NOT in alarm |
| Red | RU is in alarm | |
|
OP |
Green | Optical Link is established and operational |
| Red | Optical Link is NOT established and operational | |
| SYNC2600 | Green | 2600 TDD Sync established |
| Off | 2600 TDD Sync not established | |
|
SYNC3500 |
Green | 3500 TDD Sync established |
| Off | 3500 TDD Sync not established | |
|
SYNC3700 |
Green | 3700 TDD Sync established |
| Off | 3700 TDD Sync not established |
TECHNICAL SPECIFICATION
FREQUENCY BANDS
Table 3 Medium Power Remote frequency bands
| Band | TX Frequency (MHz) | RX Frequency (MHz) | IBW (MHz) |
| B12 | 728-746 | 698-716 | 18 |
| B13 | 746-758 | 776-788 | 12 |
| B14 | 758-768 | 788-798 | 10 |
| B5 | 862-894 | 817-849 | 32 |
| B66 | 2110-2200 | 1695-1780 | 90/85 |
| B25 | 1930-2000 | 1850-1915 | 70/65 |
| B41 | 2496-2690 | 2496-2690 | 194 |
| N77 | 3450-3550 | 3450-3550 | 100 |
| N77 | 3700-3980 | 3700-3980 | 280 |
RU GAIN
Table 4 Typical output power allocation
| Band | TX Gain (dB) | RX Gain (dB) |
| B12 | 40 | 35 |
| B13 | 40 | 35 |
| B14 | 40 | 35 |
| B5 | 40 | 35 |
| B66 | 43 | 35 |
| B25 | 43 | 35 |
| B41 | 47 | 35 |
| N77 | 47 | 35 |
| N77 | 47 | 35 |
OUTPUT POWER
Table 5 Typical output power allocation
| Band | TX Frequency (MHz) | Output power(dBm) |
| B12 | 728-746 |
30 |
| B13 | 746-758 | |
| B14 | 758-768 | |
| B5 | 862-894 | 30 |
| B66 | 2110-2200 | 33 |
| B25 | 1930-2000 | 33 |
| B41 | 2496-2690 | 37 |
| N77 | 3450-3550 | 37 |
| N77 | 3700-3980 | 37 |
ELECTRICAL SPECIFICATION
INPUT POWER VOLTAGE
Table 6 Input power voltage
| Unit | Operation Voltage Range |
| MRU-78517192537-AC | 100V to 240V AC |
| MRU-78517192537-DC | 48V DC |
POWER CONSUMPTION
Table 7 Power consumption
|
Mode |
Output Power (W) | Typical Power Consumption (W) | Maximum Power Consumption (W) |
| Normal | 21 | 160 | 190 |
MECHANICAL AND ENVIRONMENTAL
EQUIPMENT SIZE AND WEIGHT
Table 8 Equipment size and weight
| Dimension (H x W x H) | Weight |
| 480mm x 250mm x 130mm | 15 kg (without mounting bracket) |
ENVIRONMENTAL
Table 9 Equipment environment specification
| Item | Specifications |
| Operation Temperature(°C) | -20 – +55 |
| Operation Humidity | 5 – 95%, non-condensing |
| Storage Temperature(°C) | -40 – +55 |
| Environmental Protection | IP 30 |
| Cooling | Convection (fans optional) |
TRANSMISSION INTERFACE SPECIFICATION
Table 10 Fronthaul interface specification
| Item | Specifications |
| Port Type | SC-APC |
| No. of Ports | 1 |
| Wave length（nm） | TX 1310+ RX 1550+WDM |
| Topology | Star |
| Maximum optical loss | 8dBo |
INSTALLATION INSTRUCTIONS
PACKING LIST
Table 11 Package list
| NO | Description | Model | Quantity | Remarks |
|
1 |
MRU |
MRU-78517192537-AC / MRU-78517192537-DC |
1 Pcs |
ACCESSORIES INCLUDED
| NO | Description | Item code | Quantity | Remarks |
| 1 | GND Cable | 6AWG,2m | 1 Pcs | |
| 3 | Expansion bolt | M10×110 | 4 Pcs | |
| 4 | Mounting bracket 1 | ADAS-S5100-5812 | 1 Pcs | |
| 7 | Screw | M6×16 | 4Pcs | |
| FAN | MPRU-S5100 | 1 Pcs |
TOOLS REQUIREMENT
The requirement for the installation tools as follows:
INSTALLATIONS
MRU INSTALLATION STEP
The Installation method of MRU is divided into wall-mount.
Step 1:Remove the mounting rack from the MRU, use percussion drill to drill 4 pole of Φ14 with 65-75 mm depth, as shown in Figure 4.
Step 2: use hammer push 4 M10 expansion bolt into the hole of the wall, fix the mounting bracket (ADAS-S5100-5812) to the wall according the Figure 5.
Step 3: Lift the device, align the four mounting screws with the slot of the mounting tray, and tighten the four M8 screws on the left and right sides to secure the device, as shown in Figure 6.
If need the Splitter, please use RF Cable to connect the TX port of MRU to the COM port of splitter, as shown in Figure 7.
If need the FAN, please insert the fan into the guide rail of the bracket and lock it with two M5 screws, and then connect the plug of the fan to the fan socket of the MRU, as shown in Figure 8.
GROUNDING
The Grounding cable is provided with the screw which will be installed at the chassis as shown in Figure 9.
Part 20 and part 90 signal booster, this is a 90.219 class B device.
WARNING! This is NOT a CONSUMER device. It is designed for installation by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST have an FCC LICENSE or express consent of an FCC Licensee to operate this device. You must register part 90 Class B signal boosters (as defined in 47 CFR 90.219) online at www.fcc.gov/signal-boosters/registration. Unauthorized use may result in significant forfeiture penalties, including penalties in excess of $100,000 for each continuing violation.
Note: The grantee is not responsible for any changes or modifications not expressly approved by the party responsible for compliance. Such modifications could void the user’s authority to operate the equipment.
WARNING!
Use only authorized and approved antennas, cables and/or coupling devices! The use of unapproved antennas, cables or coupling devices could cause damage and may be of violation of FCC regulations. The use of unapproved antennas, cables and/or coupling devices is illegal under FCC regulations and may subject the user to fines.
Any installation, adjustment, maintenance and repair of the equipment must only be carried out by trained, authorized personnel. At all times, personnel must comply with any safety notices and instructions.
The design of the antenna installation needs to be implemented in such a way so as to ensure RF radiation safety levels and non-environmental pollution during operation.
Note: Antennas, feeders and couplers are not included in the packing list; solution provider should consider these accessories according to site conditions.
WARNING! Antenna gain should not exceed 5dBi
To comply with FCC RF exposure compliance requirements, each individual antenna used for this transmitter must be installed to provide a separation distance greater than 3.2m or more from all persons during normal operation and must not be co-located with any other antenna for meeting RF exposure requirements.
Contact information, i.e., licensee for Class B devices at (https://signalboosters.fcc.gov/signal-boosters/).
Documents / Resources
 |
Comba COMFLEX NG MRU Medium Power Remote Unit [pdf] User Manual CFNG-MRU, PX8CFNG-MRU, PX8CFNGMRU, COMFLEX NG MRU Medium Power Remote Unit, COMFLEX NG MRU, Medium Power Remote Unit, Power Remote Unit, Remote Unit, Unit |