MAINTENANCE MANUAL
IFR 4000
2-2-3
Page 30
Aug 1/04
(13) ILS
TEST EQUIPMENT:
Modulation
Analyzer
10 dB Pad (Inline)
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) and 10 dB Pad 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
.
MARKER BEACON
5. Press the MODE Select Key until the ILS Mode Screen is displayed.
6. Set the Test Set as follows:
FIELD
SETTING
FREQ
108.100 MHz
RF LVL
-30.0 dBm
MOD TONE
400 Hz (Marker ON)
M MOD
CAL
7. Verify 75 MHz (
±
1 ppm) and tone frequency of 400 Hz (
±
0.02%) with
<5% distortion and an AM Depth of 95% AM (
±
5% AM) on the Modulation
Analyzer.
8. Set the MOD TONE Field to
1300 Hz
.
9. Verify 1300 Hz (
±
0.02%) with <3.75% distortion and an AM Depth of 95% AM
(
±
3.75% AM) on the Modulation Analyzer.
10. Set the MOD TONE Field to
3000 Hz
.
11. Verify 3000 Hz (
±
0.02%) with <3.75% distortion and an AM Depth of 95% AM
(
±
3.75% AM) on the Modulation Analyzer.
LOCALIZER
12. Set the Test Set as follows:
FIELD
SETTING
MOD TONE
1020 Hz
TONE DEL
90 & 150
13. Verify 108.100 MHz (
±
1 ppm) and tone frequency of 1020 Hz (
±
0.02%) at -10
dBm (
±
2.5 dB) with <2.5% distortion and an AM Depth of 30% AM (
±
2% AM) on
the Modulation Analyzer.
14. Set the Test Set as follows:
FIELD
SETTING
MOD TONE
OFF
TONE DEL
150
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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