User Manual

STTRS DOCUMENTATION
Document Number 80-330501HBKM – Issue A - Draft Page 337 of 500
7 8 96
1 2 3 4 5
9-Way Pin-Out Graphical Representation
Low Noise Amplifier (11-006702) ‘D’ Connector Pin-out details
Connector pin Signal
1 +Ve input (10-24V)
2 GND
3 Alarm RelayO/P bad
4 Alarm Relay common
5 Alarm Relay good
6 No connection
7 TTL voltage set
8 TTL alarm/0V (good)
9 O/C good/0V bad
18.3.4.7. Low Power Amplifier (12-021901)
The low power amplifier used is a triple stage solid-state low-noise amplifier. Class A circuitry is used
in the unit to ensure excellent linearity over a very wide dynamic range. The three active devices are
very moderately rated to provide a long trouble-free working life.
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.
There are no adjustments on this amplifier, and in the unlikely event of failure then the entire amplifier
should be replaced.
Low Power Amplifier (12-021901) Specification
PARAMETER SPECIFICATION
Frequency range 800-960MHz*
Bandwidth 20MHz *
Maximum RF output >1.0 Watt
Gain 15dB
1dB compression point +30.5dBm
3
rd
order intercept point +43dBm
Noise Figure <6dB
VSWR better than 1.5:1
Connectors SMA female
Supply 500mA @ 10-15V DC
operational
-10°C to +60°C
Temperature
range
storage
-20°C to +70°C
Weight 0.5 kg
Size 167x52x25mm
* Tuned to Customer’s specification