MAINTENANCE MANUAL
IFR 4000
2-2-3
Page 22
Aug 1/04
(10) VOR
TEST EQUIPMENT:
Modulation
Analyzer
VERIFICATION FAILURE:
If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to
Troubleshooting for corrective action.
STEP PROCEDURE
1. Connect the Modulation Analyzer (RF Input) to the ANT Connector.
2. Set the Modulation Analyzer to AM Measurement.
3. Press the SETUP Key to display the Setup Menu.
4. Set the PORT Field to
ANT
.
MODULATION FREQUENCY, DISTORTION AND DEPTH ACCURACY
5. Press the MODE Select Key until the VOR Mode Screen is displayed.
6. Set the Test Set as follows:
FIELD
SETTING
FREQ
108.000 MHz
RF LVL
10.0 dBm
MOD TONE
1020 Hz
M MOD
CAL
30 Hz MOD
0%
9960 Hz MOD
0%
7. Verify 1020 Hz (
±
0.02%) with <2.0% distortion and an AM Depth of 30% AM
(
±
2% AM) on the Modulation Analyzer.
8. Set the Test Set as follows:
FIELD
SETTING
MOD TONE
OFF
30 Hz MOD
30%
9. Verify 30 Hz (
±
0.02%) with <2.0% distortion and an AM Depth of 30% AM
(
±
2% AM) on the Modulation Analyzer.
10. Set the Test Set as follows:
FIELD
SETTING
30 Hz MOD
0%
9960 Hz MOD
30%
11. Verify 9960 Hz (
±
0.02%) with <2.0% distortion and an AM Depth of 30% AM
(
±
2% AM) on the Modulation Analyzer.
12. Set the 30 Hz MOD Field to
30%
.
13. Verify AM Depth of 60% AM (
±
4% AM) on the Modulation Analyzer.
FM DEVIATION ACCURACY
14. Set the Modulation Analyzer to FM Measurement.
15. Verify 480 Hz (
±
25 Hz) on the Modulation Analyzer.
Summary of Contents for IFR 4000
Page 1: ...NAV COMM Test Set Maintenance Manual 1002 5600 4P0 IFR 4000...
Page 3: ...MAINTENANCE MANUAL IFR 4000 FOR QUALIFIED SERVICE PERSONNEL ONLY...
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