Motorola PM1200, Basic Service Manual

Page: 49 / 138

6880309U09-A October 26, 2007
Radio Alignment and Programming Procedures : PM1200 Radio Alignment Software 5-7
6. Repeat the same procedure to fine tune the Rx Tune Alignment on each operating frequency
programmed for the radio, using the Frequency offset slide bars associated with the various
channels.
Figure 5-5. RX Tune Alignment Screen
5.5.4 SQL Alignment
5.5.4.1 SQL Threshold Alignment
1. Left-click the Squelch tab to align the Squelch Circuit.
2. Left-click SQL Threshold to align the Squelch Threshold Level.
3. Toggle the Programmable SQL Function Button and rotate the Channel Knob to SQL 1.
4. Inject an on channel signal to the radio at -47 dBm with ±3.0 kHz deviation of a 1 kHz audio
tone to verify the radio is receiving the desired frequency.
5. Adjust to the rated audio by rotating the Volume Knob to 6.32 V.
6. Set the RF Signal Generator output to the Center frequency of the operating band, at a level
of -123 dBm signal with ±3.0 kHz deviation of a 1 kHz audio tone.
7. Adjust the RF signal until the radio is totally muted.