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AutoTune for Motorola APX Series Radios User Guide
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6.7. Rx Front End Filter
RF Control Port Frequency Modulation
Generate RF IN/OUT, RF GEN OUT Test Frequency FM
Table 6-15. Analyzer Configuration for Rx Front End Filter alignment
6.7.1. Alignment
Note: This alignment is only performed for UHF R1 and UHF R2 band models.
The Rx Front End Filter adjusts the radio’s RF front end for optimal selectivity and
sensitivity.
The radio is placed into Test Mode at the first Rx Test Frequency. Depending on the
radio model under test, the analyzer generates a CW signal at -90 dBm or a 1 kHz
modulation tone at 60% rated channel deviation at -80 dBm. The radio softpot is then
auto-aligned. This adjustment is performed for each Rx Test Frequency. The results for
each Rx Test Frequency are written to the test log file.
Name Description
Result Pass or Fail. Pass unless radio reports an error.
Frequency Test Frequency
Old Softpot Original radio softpot setting
New Softpot Radio softpot setting after alignment
Table 6-16. Rx Front End Filter alignment results
6.8. Rx Distortion
This is a test only; there is no alignment.
RF Control Port Frequency Modulation Level
Generate RF IN/OUT Test Freq FM, 60% rated deviation -50 dBm
Table 6-20. Analyzer Configuration for Rx Distortion Test
6.8.1. Test
The analyzer is setup as specified in this section’s Analyzer Configuration table. The
radio is placed into Test Mode at the lowest Rx Test Frequency. The radio audio output
level is tested and if insufficient to measure distortion the volume is increased until
sufficient to measure distortion. The audio signal’s distortion level is then measured and
compared to test limits. The final results are written to the log file.