Table 4-5. Receiver Performance Checks; Table 4-4. Test Frequencies - Motorola Commercial Series Basic Service Manual

4-4
Channel Selector
Test Channel
Switch Position
1 Low Power TX#1 or #8
8 High Power RX#1 or #8
2 Low Power TX#2 or #9
9 High Power RX#2 or #9
3 Low Power TX#3 or #10
10 High Power RX#3 or #10
4 Low Power TX#4 or #11
11 High Power RX#4 or #11
5 Low Power TX#5 or #12
12 High Power RX#5 or #12
6 Low Power TX#6 or #13
13 High Power RX#6 or #13
7 Low Power TX#7 or #14
14 High Power RX#7 or #14
Test Name Communications Analyzer
Reference Mode: PWR MON
Frequency
4th channel test frequency
Monitor: Frequency error
Input at RF In/Out
Rated Audio Mode: GEN
Output level: 1.0m V RF
4th channel test frequency
Mod: 1 kHz tone at
3 kHz deviation
Monitor: DVM: AC Volts
Distortion As above, except to distortion As above
Sensitivity As above, except SINAD,
(SINAD) lower the RF level for 12 dB
SINAD.
Noise RF level set to 1 mV RF
Squelch
Threshold
(only radios
with conven-
tional system
As above, except change
need to be
frequency to a conventional
tested)
system. Raise RF level from
zero until radio unsquelches.
October, 2009

Table 4-4. Test Frequencies

VHF 1 VHF 2
(136-162 (146-174
MHz) MHz)
136.625 146.625
140.325 150.775
144.525 155.275
148.875 160.125
153.325 164.475
157.875 169.475
161.975 173.875

Table 4-5. Receiver Performance Checks

Radio
TEST MODE,
Test Channel 4
*
carrier squelch
output at
antenna
TEST MODE
Test Channel 4
carrier squelch
*
As above
As above
out of TEST
MODE; select
a conventional
system
Performance Checks: RF Test Mode
UHF 1 UHF 2
(403-440 (438-470
MHz) MHz)
403.625 438.625
409.775 443.775
415.275 448.275
421.125 454.125
427.475 459.475
433.475 464.475
439.875 469.875
Test Set
PTT to continu- Frequency error to be
ous (during the ±186 Hz VHF1
performance ±200 Hz VHF2
check) ±525 Hz UHF1
±568 Hz UHF2
±600 Hz UHF3
PTT to OFF Set volume control to
(center), meter 3.46 Vrms
selector to Audio
PA
As above Distortion <3.0%
PTT to OFF RF input to be <0.30
μV (0.25 μV typical).
(center)
PTT to OFF Set volume control to
(center), meter 3.46 Vrms
selection to
Audio PA, spkr/
load to speaker
As above Unsquelch to occur at
<0.25 μV.
Preferred SINAD =
6-9 dB
UHF 3
(465-495
MHz)
465.625
470.775
475.275
480.125
485.475
490.475
494.875
Comments
68009328001-A