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ATCOM AT800 Series Bedienungsanleitung Seite 29

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AutoTune™ User Guide
22
6.3. Deviation Balance
RF Control
Port
Frequency
Modulation
Attenuation
Monitor
RF IN/OUT
Test Frequency
FM
30 dB
Table 6-8. Analyzer Configuration for Deviation Balance test, alignment
6.3.1. Alignment
The radio is placed into Test Mode at the highest TX Test Frequency and commanded
to transmit. The radio generates an 80 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 test limits. 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.
Dual-Band: This alignment is performed consecutively for all test frequencies in both
bands.
Name
Description
Result
Pass or Fail. Percent difference between low and high tone
deviation less than or equal to Variance.
Frequency
Test Frequency
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 6-9. Deviation Balance alignment results
6.3.2. Test
The radio is placed into Test Mode at the highest TX Test Frequency and commanded
to transmit. The radio generates an 80 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 percent difference is
compared against test limits and written to the log file. This test is performed for each
remaining TX Test Frequency.
Dual-Band: This test is performed consecutively for all test frequencies in both bands.
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