BFW
Installation Guide
AN-30e & AN-50e Systems
3.3 IF
Cabling
The IF cable connecting the IDU to the ODU is one of the most important
components in the installation process. The cable quality and loss profile has a
critical bearing on the performance of the wireless link. If the customer selects to
purchase the cable separately, the cable must be of a recommended type and be
assembled using the recommended connectors. See the following sections for
approved cables and connectors.
3.3.1 IF Cable Routing
Before routing the IF cable, check the following:
- Check drilling requirements, through a wall or ceiling for routing the cable.
- Look for a building plan for any existing cable routing.
- Avoid excessive force or stress on the connectors that may damage the cable.
The minimum bend radius is 1" (2.5 cm) for RG-6 and 4" (10 cm) for RG-11.
- Secure the cable along its complete indoor and outdoor length with tie-wraps.
- Do not use connectors as cable-grips to pull cable through raceway or conduit.
3.3.2 IF Cable Selection
The IF cable carries the following signals between the IDU and ODU:
- OFDM IF signal at 815 MHz
- Local Oscillator (LO) signal at 2.5 GHz
- 24 Volt DC voltage for the T-58/T54 Electronics
- Control signal between IDU and ODU
F-type connectors are used for the IF cables. Crimpable F-connectors using the
center conductor of the cable as the connector pin must not be used for the RG-11
cable. The diameter of the RG-11 cable center conductor is >1 mm, and will
damage the mating F-connector on the ODU/IDU if used as the connector pin. In
addition, the RG-6 and RG-11 connector pin must not be longer than 0.13" (1 cm).
If incorrect F-connectors are used the ODU/IDU is not covered under warranty. To
avoid damage, use only Redline approved F-connectors for RG-6 or RG-11 cable.
Refer to the following list of recommend IF cables and manufacturers.
RG-11 Cable Option
- Belden, P/N: 7731A
- F-connector for cable: Thomas & Betts #LRC-SNS-11AS
- Stripping tool: Thomas & Betts part number CST596711
- Compression tool: Thomas & Betts part number L3011B
- Maximum cable length: 122 m (400 ft) with two IF lightning arrestors.
- Maximum cable attenuation displayed on GUI: 12 dB
- 815 MHz attenuation: 14 dB, 2.5 GHz attenuation: 28 dB
70-00042-01-02
Proprietary Redline Communications © 2005
August
2005
Page 19 of 34
