User Manual

Axell Wireless Limited
Technical Literature
L.A. M.T.A. Remote Sites
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 13 of 148
3.2. In-Line BDA Wall Mount 80-301401 List of Major Components
Section Component
Part
Component Part Description Qty Per
Assembly
3.3. 80-301402 Combiner 1
3.4. 80-301403 VHF/UHF BDA Unit 1
3.5. 80-301404 UHF BDA Unit 1
3.6. 80-301405 800MHz BDA Unit 1
3.3. Combiner 80-301402
Splitter/Combiner 80-301402 is the main Splitter/Combiner unit. Signals are received from the leaky
feeder and are then split into their various separate paths before being amplified by external band
specific amplifiers and then the signals are re-combined for onward transmission via the leaky feeder
The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx)
Downlink signals are received at the port labelled “DOWNLINK INPUT” (Annotated AA in the picture
in section 3.3.4.2.) and there is a 30dB test port labelled “DOWNLINK INPUT TEST PORT” (Z in
section 3.3.4.2.).
Ports labelled 1 to 5 (P to T in section 3.3.4.2.) are the Downlink outputs to the amplification stages
and ports labelled A to E (A to E in section 3.3.4.2.) are the Downlink inputs from the amplification
stages. These outputs and inputs are further described below.
The Downlink signal leaves the Splitter/Combiner for the leaky feeder via the port labelled
“DOWNLINK OUTPUT” (L in section 3.3.4.2.) and there is a 30dB test port labelled “DOWNLINK
OUTPUT TEST PORT” (K in section 3.3.4.2.).
Uplink signals are received at the port labelled “UPLINK INPUT” (N in section 3.3.4.2.) and there is a
30dB test port labelled “UPLINK INPUT TEST PORT” (M in section 3.3.4.2.).
Ports labelled F to J (F to J in section 3.3.4.2.) are the Uplink outputs to the amplification stages and
ports labelled 6 to 10 (U to Y in section 3.3.4.2.) are the Uplink inputs from the amplification stages.
These outputs and inputs are further described below.
The Uplink signal leaves the Splitter/Combiner for the leaky feeder via the port labelled “UPLINK
OUTPUT” (CC in section 3.3.4.2.) and there is a 30dB test port labelled “UPLINK OUTPUT TEST
PORT” (BB in section 3.3.4.2.).
Splitter/Combiner 80-301402 also incorporates bandpass filtering for the three UHF bands, the filters
are placed in the RF path before the outputs to and after the inputs from the external amplification
stages