Aeroflex IFR 4000, Maintenance Manual, Page: 56 / 211

MAINTENANCE MANUAL
IFR 4000
2-2-3
Page 14
Aug 1/04
(6) RF Level Flatness (RF I/O Connector)
TEST EQUIPMENT: Power Meter
Power Sensor
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 Power Sensor to the Power Meter (POWER REF Connector) and
zero Power Meter.
2. Disconnect the Power Sensor from the Power Meter (POWER REF Connector)
and connect the Power Sensor to the RF I/O Connector.
3. Press the SETUP Key to display the Setup Menu.
4. Set the PORT Field to RF I/O .
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 -20.0 dBm
MOD TONE OFF
M MOD 0%
7. Set the Power Meter to 108.000 MHz.
8. Record -20 dBm level on the Power Meter.
9. Set the RF LVL Field to -40 dBm .
10. Record -40 dBm level on the Power Meter.
11. Set the FREQ Field to 110.150 MHz .
12. Set the Power Meter to 110.150 MHz.
13. Set the RF LVL Field to -20 dBm .
14. Record -20 dBm level on the Power Meter.
15. Set the RF LVL Field to -40 dBm .
16. Record -40 dBm level on the Power Meter.
17. Press the MODE Select Key until the MARKER BEACON Mode Screen is
displayed.
18. Set the Test Set as follows:
FIELD SETTING
FREQ 75.000 MHz
RF LVL -20.0 dBm
MOD TONE OFF
M MOD 0%
19. Set the Power Meter to 75.000 MHz.
20. Record -20 dBm level on the Power Meter.