AutoTune for Motorola APX Series Radios User Guide
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6.6. Tx Deviation Balance
RF
Control
Port
Frequency
Modulation Attenuation
Monitor
RF IN/OUT Test Frequency FM
20 dB
Table 6-13. Analyzer Configuration for Tx Deviation Balance alignment
6.6.1. Alignment
The radio is placed into Test Mode at the highest TX Test Frequency and commanded
to transmit. The radio generates a 100 Hz modulation tone and the deviation of this tone
is measured with the analyzer. The radio then generates a 3 kHz modulation tone and
the deviation of this tone is measured with the analyzer. The radio softpot is adjusted
until the deviation difference between the first and second tones is within range. This
adjustment is performed for each TX Test Frequency and the percent difference is
compared against test limits. The results for each TX Test Frequency are written to the
log file.
Name
Description
Result
Pass or Fail. Percent difference between low and high tone
deviation less than or equal to Variance.
Frequency
Test Frequency
Low Tone
Deviation measured at 100 Hz tone
High Tone
Deviation measured at 3 kHz tone
Variance
Measured difference between Low and High Tone deviation
Max Limit
Maximum passable percent difference (inclusive) between Low and
High Tone deviation
Old Softpot Original radio softpot setting
New Softpot Radio softpot setting after alignment
Table 6-14. Tx Deviation Balance alignment results
