MAINTENANCE MANUAL
IFR 6000
2-2-3
Page 21
Aug 1/06
(13) DME Measurement - Interrogation Frequency
TEST EQUIPMENT: ATC-1400A
Frequency Counter
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. Make the connection as shown in Figure 10:
DME Measurement - Interrogation Frequency Test Connection
Figure 10
2. On the ATC-1400A, set RF output to ā10 dBm and CW/NORM/OFF switch to CW.
3. Set frequency (in MHz) to 1025, 1064, 1110, and 1150 respectively.
4. At each setting, record the frequency displayed on the Frequency Counter.
5. Set up the ATC-1400A:
FREQ/Function Select: 1025 MHZ X
RF LEVEL Control: ā10 dBm
CW/NORM/OFF: NORM
DME P2 Switch: CAL
Self Interrogation: ON
Set other toggle Switches to OFF/CAL position
6. Move cable from the frequency counter to the ANT port.
7. Press the SETUP key twice to display the SETUP-DME screen.
8. Verify the RF PORT shows ANTENNA. If necessary, change it to ANTENNA.
9. Press the DME Key to display the DME screen
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