Aeroflex IFR 4000, Maintenance Manual, Page: 50 / 211

MAINTENANCE MANUAL
IFR 4000
2-2-3
Page 8
Aug 1/04
STEP PROCEDURE
16. Press the MODE Select Key until the COMM UHF Mode Screen is displayed.
17. Set the Test Set as follows:
FIELD SETTING
FREQ 400.000 MHz
RF LVL -30.0 dBm
MOD TONE OFF
M MOD 0%
18. 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.
19. Verify -30 dBm (
±
3 dB) on the Power Meter.
20. Press the MODE Select Key until the COMM VHF AM Mode Screen is displayed.
21. Set the Test Set as follows:
FIELD SETTING
FREQ 137.000 MHz
RF LVL -30.0 dBm
MOD TONE OFF
M MOD 0%
22. 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.
23. Verify -30 dBm (
±
3 dB) on the Power Meter.
24. Set the FREQ Field to 118.000 MHz .
25. Set the RF LVL Field to the following settings and verify levels on the Power
Meter:
RF LVL LEVEL
-57 dBm
-57 dBm (
±
3 dB)
-47 dBm -47 dBm (
±
3 dB)
-37 dBm -37 dBm (
±
3 dB)
-27 dBm -27 dBm (
±
3 dB)
-17 dBm -17 dBm (
±
3 dB)
-7 dBm
-7 dBm (
±
3 dB)
+3 dBm +3 dBm (
±
3 dB)
+13 dBm +13 dBm (
±
3 dB)
26. Set the RF LVL Field to -67 dBm .
27. Disconnect the Power Sensor from the ANT Connector and connect the
Measuring Receiver to the ANT Connector.
28. Load Calibration Factors for 118.000 MHz on the Measuring Receiver.
29. Verify -67 dBm (
±
3 dB) on the Measuring Receiver.
30. Disconnect the Measuring Receiver from the ANT Connector.