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 64 of 148
3.6.5.4. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
10-000701 Specification
PARAMETER SPECIFICATION
Attenuation Values 0-30dB
Attenuation Steps 2, 4, 8 and 16dB
Power Handling 0.25 Watt
Attenuation Accuracy ± 1.0 dB
Frequency Range DC to 1GHz
Impedance 50ȍ
Connectors SMA
VSWR 1.3:1
Weight 0.2kg
operation -20°C to +60°C Temperature
range
storage -40°C to +70°C
3.6.5.5. Low Noise Amplifier (11-005902)
The Gallium-Arsenide 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 and extremely low
noise 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, then the complete amplifier should be replaced.
This amplifier features its own in-built alarm system which gives a volt-free relay contact type alarm
that is easily integrated into any alarm system. There is a Current Fault Alarm Function, which
indicates failure of each one or both RF transistors by a various alarm output options. 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.
11-005902 Specification
PARAMETER SPECIFICATION
Frequency range 800 – 960MHz
Bandwidth <170MHz
Gain 19.5dB (typical)
1dB compression point +21dBm
OIP3 +33dBm
Input/output return loss >20dB
Noise figure 1dB (typical)
Power consumption 190mA @ 24V DC
Supply voltage 10-24V DC
Connectors SMA female
operational -10°C to +60°C Temperature
range
storage -40°C to +70°C
Size 90 x 55 x 30.2mm
Weight 0.28kg