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
0.25
µ
V
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
<0.25
µ
V.
Preferred SINAD =
9-10dB
