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 33 of 148
3.4.5.4. Low Noise Amplifier (11-005401)
The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise amplifier.
Class A circuitry is used throughout the units to ensure excellent linearity over a very wide dynamic
range. The active devices are very moderately rated to provide a long trouble-free working life. There
are no adjustments on these amplifiers, and in the unlikely event of a failure, the complete amplifier
should be replaced. The amplifier is housed in an aluminium case (Iridite NCP finish) with SMA
connectors for the RF input/output and a 9way D-type for DC and alarm outputs.
11-005401 Specification
PARAMETER SPECIFICATION
Frequency range 380 - 500MHz
Bandwidth <100MHz (as required, tuneable)
1dB compression point >+20dBm
3rd order intercept >+33dBm
Gain >15.5dB (typical)
VSWR better than 1.5:1
Input return loss >14dB
Noise figure <2.0dB (typical)
Connectors SMA female
Supply 115mA at 12V DC
operational -10°C to +60°C Temperature
range
storage -40°C to +70°C
Size 88 x 50 x 34mm (ex. connectors)
Weight 0.26kg
LNA ‘D’ Connector Pin-out details
Connector pin Signal
1 +ve input (10-24V)
2 GND
3 Alarm relay O/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
9-Way Pin-Out Graphical Representation