Main Function Test Chart (Sheet 2) - Motorola MTM800 User Manual

TROUBLESHOOTING CHARTS: 450-470MHz

Main Function Test Chart (Sheet 2)

Tetra Com Script for RX Test
MODE IDLE
FREQ RX 405.025
L1TIMER ON
AVE 10
MODE RSSI
GO
Use STOP to terminate RSSI reading
Tetra Com Script for RX Audio Test
MODE IDLE
DSP_LOOP OFF
GEN_TONE 1000
DSP_VOL -5
VOL_M 27
SPKR INT
Tetra Com Script for TX Audio Test
MODE IDLE
GEN_TONE OFF
DSP_LOOP ON
DSP_VOL 0
VOL _M 24
MICGA_M 27
MIC PHF
SPKR INT
From Sheet 1
A
Setup IFR to:
No System,
RX Test,
Generator Frequency 460.025MHz
Generator Level -85dBm
Run Tetra Com script for RX test
RSSI
reading within -90
and -80dBm
?
Yes
Connect the speaker output on the radio's accessory connector via
testbox RLN4460B to the audio input on the IFR.
Setup IFR to:
No System,
AF Test,
AF IN/OUT,
Gen 1,2,3 Off,
Distortion On
Run Tetra Com script for RX Audio Test
Audio level >5V
and distortion < 5%
?
Yes
Connect the microphone input on the radio's accessory connector via
testbox RLN4460B to the audio output on the IFR.
Setup IFR to:
No System,
AF Test,
AF IN/OUT,
Gen 1 On,
AF 1 Frequency 1kHz
AF 1 Level 80mV
Distortion On
Run Tetra Com script for TX Audio Test
Audio level >5V
and distortion < 2%
?
Yes
Tune and test the Radio using
PATS station.
No
Receiver failure!
Go to Receiver Chart
No
Receiver audio failure!
Go to Receiver Audio Chart
No
Transmitter audio failure!
Go to Transmitter Audio Chart
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