User Manual

STTRS DOCUMENTATION
Document Number 80-330501HBKM – Issue A - Draft Page 108 of 500
8.4. Beacon Hill Station Cross Passage A (80-330591-1) Major Sub Components
8.4.1. Wideband Asymmetric Coupler (07-015102)
The purpose of Wideband Asymmetric Coupler (07-015102) is to tap off a known portion (in this case
10dB) of RF signal from transmission lines and to combine them, for example through splitter units for
different purposes (alarms/monitoring etc.), whilst maintaining an accurate 50Ω load to all
ports/interfaces throughout the specified frequency range. They are known formally as directional
couplers as they couple power from the RF mainline in one direction only.
07-015102 Specification
PARAMETER SPECIFICATION
Frequency Range 800 - 2500 MHz
Coupling Value 10 dB ± 1.0 dB
Main Line Insertion Loss <1.6 dB
VSWR 1.4:1
Directivity >18 dB
Power Rating 200 Watts
RF Connectors ‘N’ female
operation
-20°C to +60°C
Temperature
range
storage
-40°C to +70°C
8.4.2. Power Amplifier (12-018002)
This amplifier is a Class A 20W power amplifier from 800-960MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
12-018002 Specification
PARAMETER SPECIFICATION
Frequency range 800-960MHz
Small signal gain 30dB
Gain flatness ±1.2dB
I/O Return loss >18dB
1dB compression point 42.8dBm
OIP3 56dBm
Supply voltage 24V DC
Supply current 5.0Amps (Typical)
operational -10°C to +60°C Temperature
range
storage -20°C to +70°C
Weight <2kg (no heatsink)