Table 4-5. Receiver Performance Checks; Table 4-4. Test Frequencies - Motorola PR400 Basic Service Manual

4-4
Channel Selector
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 fre-
need to be
quency to a conventional sys-
tested)
tem. Raise RF level from zero
until radio unsquelches.
July, 2004

Table 4-4. Test Frequencies

VHF1
Test Channel (136-162
MHz)

Table 4-5. Receiver Performance Checks

*
*
VHF2 UHF1
(146-174 (403-440
MHz) MHz)
146.625 403.625
150.775 409.775
155.275 415.275
160.125 421.125
164.475 427.475
169.475 433.475
173.875 439.875
Radio Test Set
TEST MODE, PTT to continu-
Test Channel 4 ous (during the
carrier squelch performance
output at check)
antenna
TEST MODE PTT to OFF
Test Channel 4 (center), meter
carrier squelch selector to Audio
PA
As above
As above PTT to OFF
(center)
As above PTT to OFF
(center), meter
selection to
Audio PA, spkr/
load to speaker
out of TEST As above
MODE; select
a conventional
system
Performance Checks: RF Test Mode
UHF 2
(438-470 (465-495
MHz)
438.625 465.625
443.775 470.775
448.275 475.275
454.125 480.125
459.475 485.475
464.475 490.475
469.875 494.875
Comments
Frequency error to be
???? Hz VHF1
±200 Hz VHF2
±525 Hz UHF1
±568 Hz UHF2
±600 Hz UHF3
Set volume control to
3.46 Vrms
Distortion <3.0%
RF input to be <0.30
µV (0.25 µV typical).
Set volume control to
3.46 Vrms
Unsquelch to occur at
<0.25 µV.
Preferred SINAD =
6-9 dB
6881096C24-A
UHF3
MHz)