
MAINTENANCE MANUAL
IFR 4000
2-2-3
Page 5
Aug 1/04
STEP PROCEDURE
16. Verify 75.0 MHz (
±
1 ppm) on the Modulation Analyzer.
17. Press the MODE Select Key until the COMM VHF AM Mode Screen is displayed.
18. Set the Test Set as follows:
FIELD
SETTING
FREQ
118.000 MHz
RF LVL
-20.0 dBm
MOD TONE
OFF
19. If the VHF AM Mode Screen is in RECEIVING Mode, press the SWITCH GEN/RX
Soft Key to switch the COMM VHF AM Mode Screen to GENERATING Mode.
20. Verify 118.0 MHz (
±
1 ppm) on the Modulation Analyzer.
21. Set the FREQ Field to
137.000 MHz
.
22. Verify 137.0 MHz (
±
1 ppm) on the Modulation Analyzer.
23. Press the MODE Select Key until the COMM UHF Mode Screen is displayed.
24. Set the Test Set as follows:
FIELD
SETTING
FREQ
225.000 MHz
RF LVL
-20.0 dBm
MOD TONE
OFF
25. If the UHF Mode Screen is in RECEIVING Mode, press the SWITCH GEN/RX
Soft Key to switch the COMM UHF Mode Screen to GENERATING Mode.
26. Verify 225.0 MHz (
±
1 ppm) on the Modulation Analyzer.
27. Set the FREQ Field to
312.000 MHz
.
28. Verify 312.0 MHz (
±
1 ppm) on the Modulation Analyzer.
29. Set the FREQ Field to
400.000 MHz
.
30. Verify 400.0 MHz (
±
1 ppm) on the Modulation Analyzer.
31. Press the SETUP Key to display the Setup Menu.
32. Set the Test Set as follows:
FIELD
SETTING
PORT
ANT
GEN FREQ
VAR
33. Press the MODE Select Key until the SELCAL Mode Screen is displayed.
34. Set the Test Set as follows:
FIELD
SETTING
FREQ
118.001 MHz
RF LVL
-20.0 dBm
35. Verify 118.001 MHz (
±
1 ppm) on the Modulation Analyzer.
36. Set the FREQ Field to
118.002 MHz
.
37. Verify 118.002 MHz (
±
1 ppm) on the Modulation Analyzer.
Содержание IFR 4000
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