Motorola CP150 Basic Service Manual page 33

RF Test Mode
Test Name Communications Analyzer
Noise RF level set to 1mV RF
Squelch
Threshold
(only radios
with conven-
tional sys-
As above, except change fre-
tem need to
quency to a conventional
be tested)
system. Raise RF level from
zero until radio unsquelches.
See Table 3-4
Test Name
Reference Mode: PWR MON
Frequency 4th channel test frequency
Monitor: Frequency error
Input at RF In/Out
Power RF As above
Voice Mode: PWR MON
Modulation 4th channel test frequency
atten to -70, input to RF In/
Out
Monitor: DVM, AC Volts
Set 1 kHz Mod Out level for
0.025Vrms at test set,
80mVrms at AC/DC test set
jack
Voice Mode: PWR MON
Modulation 4th channel test frequency
(internal) atten to -70, input to RF In/
Out
DTMF As above,
Modulation 4th channel test frequency
Table 3-5 Receiver Performance Checks (Continued)
Table 3-6 Transmitter Performance Checks
Communications
Analyzer
*
*
*
*
Radio Test Set
As above PTT to OFF
(center), meter
selection to
Audio PA, spkr/
load to speaker
out of TEST As above
MODE; select
a conven-
tional system
Radio Test Set
TEST MODE, PTT to continu-
Test Channel 4 ous (during the
carrier squelch performance
Output at check)
antenna
As above As above
As above As above, meter
selector to mic
TEST MODE, Remove modu-
Test Channel 4 lation input
carrier squelch
Output at
antenna
TEST MODE, As above
Test Channel 4
DTMF
Output at
antenna
3-5
Comments
Set volume control to
3.2Vrms
Unsquelch to occur at
<0.25µV.
Preferred SINAD =
6-9 dB
Comments
Frequency error to be
±186 Hz VHF1
±200 Hz VHF2
±525 Hz UHF1
±568 Hz UHF2
±600 Hz UHF3
Refer to Mainte-
nance Specifications
Deviation:
VHF, UHF
≥ ≤
4.0 kHz but 5.0
kHz (25 kHz Ch Sp).
Press PTT switch on
radio. Say "four"
loudly into the radio
mic. Measure devia-
tion: VHF, UHF
≥ ≤
4.0 kHz but 5.0
kHz (25 kHz Ch Sp)
Deviation:
≥
VHF, UHF 3.05 kHz
≤
but 3.45 kHz
(25 kHz Ch Sp)