Product Overview
The WISI OH 50 A COMPACTHEADEND is a basic unit designed for analogue and digital TV signals. It features slots for up to 14 modules, supports 19" rack mounting and wall mounting, includes an integrated FM amplifier, and offers easy programming via the OH 41 handset. Updates can be performed via USB memory stick, and the unit can be connected via Ethernet LAN for HTTP web browser access. Alarms and warnings can be received via e-mail.
Note: Disconnect the OH 50 A mains power before installing modules!
Included in scope of delivery: Wall mounting bracket, 19" installation kit.
Safety and Installation Notes
- ⚠️ Caution: The mains voltage must match the rated input voltage of the unit (230 VAC).
- ⚠️ CAUTION GROUNDING!! Chassis must be grounded and disconnected from line power before any RF connections are made. Improper grounding may result in irreversible damage of the equipment.
- Connecting cable: Lay cables to prevent tripping hazards and ensure water condensation drips away from the unit.
- Installation location: Avoid excessive temperatures, radiators, or heating systems.
- Moisture: Protect the unit from water dripping or splashing. Wait for condensation to evaporate before powering on.
- ⚠️ Caution - danger!: Satellite antenna systems must comply with EN 60728-1 safety requirements regarding grounding and potential equalization.
- Service work: Only qualified personnel should perform service work, always disconnecting the supply voltage first.
- Ambient temperature: Not greater than 50 °C.
- ⚠️ Thunderstorms: Avoid service work during thunderstorms.
- ⚠️ Caution - danger!: Fuses may only be replaced by qualified personnel with fuses of the same type and rating.
- Batteries: Do not throw exhausted batteries in the garbage. They must be disposed of separately.
- All packing materials (cardboard boxes, packing notes, plastic films and plastic bags) can be recycled.
Connectors
| Connector | Description |
|---|---|
| RF out | RF output; sum signal from the modules for injection into the distribution system. |
| TP -20 | Test output -20 dB. |
| FM in | Input FM amplifier, 25 dB. |
| LED "Status" | Global alarm status display showing alarm level of all OH modules. Blinks during communication. Color indicates module status (green: ok, red: alarm, yellow: first scan). Flashes red in bootloader mode. |
| LED "Power" | Status depends on OH50A temperature and power input of all modules (green: ok, yellow: warning, red: alarm). |
| LAN | Interface to connect the unit to an Ethernet network for remote control. |
| Backside: AC 230V | Mains connection. |
| Potential equalization terminal | Potential equalization terminal. |
| USB update interface | USB update interface. |
Mounting Options
Wall Mounting
For wall mounting of the OH50 chassis, use the supplied angle brackets and screws (M4x6). Fix brackets on both sides.
Wall Mounting Versions:
- If cables are fed from above, use the specific wall mounting version.
- If cables are fed from below, use the alternative wall mounting version to maintain the minimum bending radius of coaxial cables. Ensure at least 20 cm clearance.
19"-Rack Mounting
For 19"- rack mounting, use the supplied angle brackets and screws (M4x6). Fix brackets on both sides.
Mounting 19" angle brackets:
- Standard mounting uses the front holes of the brackets.
- Mounting for a bigger bending radius of connection cables uses the rear holes of the brackets.
Dust protection cover: To protect the basic unit during mounting, leave the carton as a cover at the front of the housing.
Recommendation and Short Circuit Behavior
- For operation, all slots must be equipped with a module or a blanking plate. Modules with a CI-slot require supplied covers even without a CA-module to ensure proper air flow for cooling.
- In case of a short circuit or power supply overload, the system will reboot permanently (hiccup mode). Front LEDs and the handset display will flash. After the malfunction is eliminated, the power supply returns to normal mode.
Handset OH 41 (Accessory)
The OH 41 handset is used for programming and system menu access.
Standby: After mains connection and module initialization, plug the handset into the basic unit socket. Press the [Enter Key] to enter the module menu and system menu.
Modul menu: Navigate through modules (1-14) and parameters using the navigation keys (⬆️, ⬇️, ⬅️, ➡️).
Parameter menu: Select and adjust parameters.
Parameter sub-menu: Select and change digits within a parameter value.
Saving data: Data are saved automatically after leaving the parameter menu or 60 seconds after the last entry.
Initializing the modules:
- Connect OH 50 A to mains power.
- Connect the handset OH 41.
- Modules are scanned in the background (can take up to 1 minute).
Detailed menu structures are found in the related module manual.
System Menu of the Basic Unit
The "System settings" menu allows parameter setup of the basic unit. Accessing "System settings" provides the following parameters:
- Update OH50A MultiUpdate Mod: Insert USB memory stick, select OH50A-File (Image). Modules will be updated with the latest software.
- UID License Code: For remote access. License: 8C061251 (example). Web-UI is locked by default. UID License Code is needed for a license key, entered via Web-UI or USB.
- LIC Load OH50A / LIC Load Module: Insert USB memory stick, search for Unlock code and activate it. Search for License-File and transfer to selected module (e.g., LIC to: 2 OH77).
- NIT Load Module: Import external NIT (e.g., NIT to: 2 OH77) via USB memory stick.
- CfgLoad: Upload configuration file (.cfg) from USB memory stick. Modules are configured accordingly. Module types and slot order must match the config file.
- CfgSave: Uploads the current configuration of modules to the USB memory stick (e.g., Config.OH50A_2014_05_01_14_15).
- StatSave: Saves module status (e.g., PLL-lock) to a status file on USB memory stick.
- IP-Addr: IP address setting (e.g., 192.168.000.100).
- ETH-NetMask: Subnet Mask (e.g., 255.255.255.000).
- ETH-Gateway: Gateway address (e.g., 192.168.000.001).
- Port: Standard HTTP port is 80.
- FM-Att: FM Attenuation (0-30 dB at FM input).
- Out-Att: Output Attenuation (0-15 dB at FM output).
- I-Supply: Current consumption of installed modules (< 8750 mA).
- SW-Version: Displays current software version.
- HW-Version: Displays current hardware version.
- BL-Version: Displays current boot loader version.
- Factory Reset: Resets OH 50 A to delivery status (activation key remains).
- Restart OH50A: Software-Reset OH50A.
- Restart System: Reset OH50 Headend (all modules).
- Restore Web SW: Restores factory default settings of the web interface.
Navigating back from "System settings" to the module selection menu and pressing the [Enter Key] button immediately moves the device to standby.
Saving changes: Changes are saved by leaving the "System settings" menu. If no user setting is made, the standby display appears after 60 seconds, and settings are not stored.
Update Functions (Basic Unit and Modules)
System Recovery
Press the [Up Key] and [Down Key] buttons simultaneously when power is applied. Then press the [Enter Key] button and choose Backup SW "yes" to start emergency application.
Update Functions in the OH 50A menu "system settings"
Required steps for software update:
- Connect handset to the base unit (must display standby message).
- Plug a USB memory stick into the USB port.
- Select one of the following options:
- Multiupdate Mod: Automatically updates all modules with newer software from the USB stick.
- Update OH 50A: Updates only the base unit. Ensure the file name "OH50A_HW_Vx_xx_SW_Vx_xx.bin" is unique on the USB stick.
- Cfgload: Uploads configuration settings from a file on the USB memory stick to the modules. Module types and slot order must match the configuration file.
- Cfgsave: Uploads the current module configuration to the USB memory stick (e.g., Config.OH50A_2014_05_01_14_15).
If a module update fails, it remains in bootloader mode, indicated on the web interface and handset. The module can be reprogrammed via the web interface or by selecting "Multiupdate Mod." in the "System Settings" menu via handset.
Update Precautions
- Latest firmware available at: http://wisi.de/en/business/products/compact-headend/
- Do not interrupt power supply during update.
- USB memory stick must be FAT32 formatted and must not be removed during the update.
- Do not change names of update or config files.
- Update or config files must be in the root directory of the USB memory stick.
Activation of the OH51A remote monitoring function
The UID (Unique ID) of the device is required to activate the OH51A remote monitoring function. The UID can be found on the type and packaging label.
System Configurations Example
The WISI COMPACT HEADEND processes analogue and digital TV programmes in networks.
Adjusting the system levels: The output level must always be set to the permissible system output level. The output level for each module can be adjusted via the "Out-Att" parameter menu.
Default Factory IP Parameter Values and SNMP Community Strings
| Parameter | Value |
|---|---|
| IP address | 192.168.0.20 |
| Netmask | 255.255.255.0 |
| Gateway | 192.168.0.1 |
| DHCP | disabled (DHCP functionality is disabled) |
| disabled | |
| HTTP Port | 80 (standard) |
| SNTP | disabled (time synchronisation server disabled) |
| Sync Install Time | 24 (time synchronisation all 24 hours) |
OH-Setup Windows Tool
The WISI tool "WISI OH-Setup" (filename 'OHSetup.exe') requires Windows XP/7 and an Ethernet connection to the OH50A unit. Start the program and complete the fields with the correct Ethernet MAC Address (from OH rack label) and desired IP parameters (IP-Address, Network mask, Gateway).
Press "Assign" to set parameters. The tool verifies IP validity and availability before storing them. Check the status line for success.
OH 41 Handset Priority
While the handset is in use (Modul Menü), the web interface is disabled ("Handset in use"). After 60 seconds, the handset returns to standby, and the web interface is re-enabled. The handset has higher priority.
Activation of the Web Interface
The Web UI of the OH 50 A is locked by default. After logging in as "user", a message prompts to contact a WISI distributor for a license key using the device's UID. WISI converts the UID into an unlock code for a fee. Entering this code permanently unlocks the device.
Web Interface
An Ethernet connection between a PC (with a web browser) and the OH50A unit is required.
Recommended Web Browsers:
- Internet Explorer from v8, v9
- Firefox from version 15
- Safari from version 5.1.7
- Opera from version 12.15
- Google Chrome from version 27.0.1453.116
Setup via Web Interface:
- Know the current IP address of the OH50A module. Setting the address is possible with the handset.
- Read/Write Access: Log in as "user" with password "wisi" (factory setting).
- Read Only Access: Log in as "read" (no password needed).
- Select the "Network settings" tab under "OH50A".
- If IP parameter changes are needed, press "save". The browser redirects to the new address.
Web Interface Tabs:
- General: Host configuration, DHCP configuration, Timer server configuration.
- Network setup: Configures IP address, Netmask, Gateway, DNS servers, HTTP Port.
- E-Mail setup: Allows configuring up to 3 addresses for fault reports. Supports server-side authentication. Data is not encrypted.
- Update: Updates module software, extended updates (e.g., .zli, .nit), website programming, and activation codes (.onl). Allows saving and loading module configurations.
- Booster: (Details not provided in this section, but implied tab exists)
- Logfile: (Details not provided in this section, but implied tab exists)
Specifications
Booster amplifier
| Parameter | Value |
|---|---|
| Frequency range TV | 47–862 MHz |
| Frequency range FM | 87.5–108 MHz |
| Output impedance | 75 Ω |
| Output return loss | > 14 dB |
| Output level | 110 dBμV |
| Output attenuator | 0-15 dB / 1 dB steps |
| Input level (FM) | 70–100 dBμV |
| FM attenuator | 0-30 dB / 1dB steps |
| CTB | > 60 dB |
| CSO | > 60 dB |
| Test output | -20 dB |
Power supply
| Parameter | Value |
|---|---|
| Input voltage | 180... 265 VAC (47... 63 Hz) |
| Max. power consumption | < 185 W |
| Efficiency | ≤ 89% |
| Output voltage | 12.5 V |
| Output current | 12 A |
| LNB power | 12.5 V, 1.2 A |
| PFC | EN 61000-3-2 |
Ethernet ("LAN")
| Parameter | Value |
|---|---|
| Interface | 10/100 Base-T, RJ-45 female jack |
| 2 Leds | green for link/activity, yellow for speed |
| Protocol | Data Link Layer: Ethernet Network Layer: IP, ICMP Transport Layer: UDP, TCP Application Layer: DHCP (for automatic IP address assignments), (UDP Port 123, for time and date synchronisation), SNTP, RFC 4330 HTTP (web server access) |
| Speed | 10/100 Mbps |
| Duplex | half-duplex/full-duplex, autosensing |
| IP Version | 4 |
Remote Bus (OH backplane, communicates with all connected OH modules)
| Parameter | Value |
|---|---|
| Interface | board connector, 20 pins, RS-485 |
| Protocol | Module ASCII |
| Speed | 115 kbaud |
| Duplex | half-duplex |
General Specifications
| Parameter | Value |
|---|---|
| Dimensions | 443 (19") x 132 (3HU) x 351 mm |
| Connectors | FM-input: 1 x F-connector RF-output: 1 x F-connector Test-output: 1 x F-connector Handset control: RJ 11 Software update: USB-A Remote connection: RJ 45 |
| Operating temperature range | -20 °C to + 50 °C |
| Nominal temperature range | +5 °C to +50 °C |
