Handbook

Axell Wireless Limited
Technical Literature
MWAA Primary F/O Head End Documentation
Primary Head End BDA 60-174303
Document Number 60-214802HBK Issue No. 1 Date 23/07/2009 Page 6 of 24
3. Primary Head End BDA 60-174303
There are four Primary Head End BDAs 60-174303 in Primary F/O Head End CAB 2 - 60-174301, all
housed in rack 2.
Each 60-174303 BDA is built into an 8U, 19” rack mount tray and houses RF filtering and
amplification modules; the BDAs are arranged in two pairs, Main 1 and Main 2, Standby 1 and
Standby 2
Downlink signals are received from Primary Headend Interface 60-174304 via the port labelled “A”
filtered and amplified and then fed back into Primary Headend Interface 60-174304 via the port
labelled “C”
Uplink signals are received from Primary Headend Interface 60-174304 via the port labelled “C”
filtered and amplified and then fed back into Primary Headend Interface 60-174304 via the port
labelled “B”
(see table of interconnections in section 3.4.1.).
3.1. 60-174303 List of Major Sub-Components
Component
Part
Component Part Description Qty Per
Assembly
02-005801 Bandpass Filter 1
02-005805 Bandpass Filter 1
10-000701 Variable Switched Attenuator 0-30dB 2
11-006702 Low Noise Amplifier 2
12-018601 5W Power Amplifier 2
16-096601 Duplexer Module 1
17-001117 AGC Detector Module 2
17-001201 AGC Attenuator Module 2
80-008901 12V Relay Assembly 1