ATCOM AT800 Series Manual do Utilizador descarregar pdf (Página 27)

AutoTune™ User Guide

6.3. Deviation Balance

RF Control

Port

Frequency

Modulation

Attenuation

Monitor

RF IN/OUT

Test Frequency

30 dB

Table 6-7. 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.

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 6-8. 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.

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

Softpot

Radio softpot setting

Table 6-9. Deviation Balance test results

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 45 46

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