Motorola PR400 User Manual
Page 32
August, 2004
6881096C24-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 fre-
quency to a conventional sys-
tem. 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