Chapter 4
PERFORMANCE TESTING
1.0 Introduction
The receiver and transmitter performance tests are contained in Tables 4-1 and 4-2 respectively.
Refer to Chapter 5 for the test equipment set up. Note that all test measurements are taken at 25°C.
2.0 Receiver Performance Tests
The receiver performance tests are described in Table 4-1 below.
Table 4-1 Receiver Performance Checks
Test Name
Communications
Analyzer
Radio Test Set Comments
Reference
Frequency
Mode: PWR MON
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
Test Channel
4 carrier
squelch
output at
antenna
PTT to
continuous
(during the
performance
check)
Frequency error to be
±200Hz VHF
±600Hz UHF
Rated Audio Mode: GEN
Output level: 1.0mV RF
Mod: 1kHz tone at
3kHz deviation
Monitor: DVM: AC Volts
TEST MODE
Test Channel
4 carrier
squelch
PTT to OFF
(centre), meter
selector to
Audio PA
Set volume control to
3.16Vrms
Distortion As above, except to
distortion
As above As above Distortion 3.0%
Typical
Sensitivity
(SINAD)
As above, except SINAD,
lower the RF level for 12dB
SINAD.
As above PTT to OFF
(center)
RF input to be
0.25µV
Noise
Squelch
Threshold
(only radios
with
conventional
system need
to be tested)
RF level set to 1mV RF As above PTT to OFF
(center), meter
selection to
Audio PA, spkr/
load to speaker
Set volume control to
3.16Vrms
As above, except change
frequency to a conventional
system. Raise RF level from
zero until radio unsquelches.
Out of TEST
MODE;
select a
conventional
system
As above Unsquelch to occur at
<0.25µV.
Preferred SINAD =
9-10dB
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