Motorola Commercial Series, Basic Service Manual

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October, 2009 68009328001-A
4-4 Performance Checks: RF Test Mode
Table 4-4. Test Frequencies
Channel Selector
Switch Position
Test Channel
VHF 1
(136-162
MHz)
VHF 2
(146-174
MHz)
UHF 1
(403-440
MHz)
UHF 2
(438-470
MHz)
UHF 3
(465-495
MHz)
1 Low Power
8 High Power TX#1 or #8
RX#1 or #8
136.625 146.625 403.625 438.625 465.625
2 Low Power
9 High Power TX#2 or #9
RX#2 or #9
140.325 150.775 409.775 443.775 470.775
3 Low Power
10 High Power TX#3 or #10
RX#3 or #10
144.525 155.275 415.275 448.275 475.275
4 Low Power
11 High Power TX#4 or #11
RX#4 or #11
148.875 160.125 421.125 454.125 480.125
5 Low Power
12 High Power TX#5 or #12
RX#5 or #12
153.325 164.475 427.475 459.475 485.475
6 Low Power
13 High Power TX#6 or #13
RX#6 or #13
157.875 169.475 433.475 464.475 490.475
7 Low Power
14 High Power TX#7 or #14
RX#7 or #14
161.975 173.875 439.875 469.875 494.875
Table 4-5. Receiver Performance Checks
Test Name Communications Analyzer Radio Test Set Comments
Reference
Frequency Mode: PWR MON
4th channel test frequency
*
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
Test Channel 4
carrier squelch
output at
antenna PTT to continu-
ous (during the
performance
check) Frequency error to be
±186 Hz VHF1
±200 Hz VHF2
±525 Hz UHF1
±568 Hz UHF2
±600 Hz UHF3
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
TEST MODE
Test Channel 4
carrier squelch PTT to OFF
(center), meter
selector to Audio
PA Set volume control to
3.46 Vrms
Distortion As above, except to distortion As above As above Distortion <3.0%
Sensitivity
(SINAD) As above, except SINAD,
lower the RF level for 12 dB
SINAD. As above PTT to OFF
(center) RF input to be <0.30
μ
V (0.25
μ
V typical).
Noise
Squelch
Threshold
(only radios
with conven-
tional system
need to be
tested) RF level set to 1 mV RF As above PTT to OFF
(center), meter
selection to
Audio PA, spkr/
load to speaker Set volume control to
3.46 Vrms
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 =
6-9 dB