MAINTENANCE MANUAL
IFR 6000
2-2-3
Page 12
Aug 1/06
(8) DME Echo Reply Position and Amplitude
TEST EQUIPMENT: Oscilloscope
ATC-1400A
6dB Splitter
Pulse Detector
Spectrum Analyzer
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 7.1 in previous test.
2. Set up the ATC-1400 as follows.
FREQ/Function Select: 1041 MHz X
MAN/AUTO/MAN STEP: MAN
DME Reply Efficiency: 100%
SYNC: T
D
RF LEVEL: −2dBm
CW/NORM/OFF: NORM
PRF/SQTR: 100
DME P2 Toggle Switch: CAL
Self-Interrogation: ON
Remaining toggle switches OFF/CAL position
3. Press the SETUP key twice to display the SETUP-DME screen.
4. Verify the RF PORT shows ANTENNA. If necessary, change it to ANTENNA.
5. Press the DME Key to display the DME screen
6. Set up the UUT as follows:
RVLVL: -38.2dBm (-2dBm)
CHAN: 17X
PRF: 100
RATE: STOP
RANGE: 0.0nm
SQTR: OFF
IDENT: OFF
ECHO: ON
REPLY: 100%
7. Press the RUN TEST Soft Key and verify the echo position is 370.77µS
±12.359µS) after P1 of the UUT Reply.
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