MAINTENANCE MANUAL
IFR 6000
2-2-3
Page 17
Aug 1/06
(11) DME Measurement - Interrogation Pulse Timing
TEST EQUIPMENT: ATC-1400A
Oscilloscope
Detector
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. Set up the ATC-1400A as follows:
FREQ/Function Select: 1041 MHz X
RF LEVEL Control: −2 dBm
CW/NORM/OFF: NORM
PRF: 200
DME P2 Switch: CAL
SYNC: T
D
Self Interrogation: ON
Set other toggle switches to OFF/CAL position.
2. Make the connection as shown in Figure 8.
DME Measurement - Interrogation Pulse Timing
Test Connection 1
Figure 8
3. Set Scope to trigger off CH2 at 2V and CH1 to 50-ohm impedance, invert on.
4. Measures and record the following values from the scope:
Pulse widths of P1 and P2
Pulse Spacing of X channel P1 to P2
5. Change the ATC-1400A settings as follows:
FREQ/Function Select: 1041 MHz X
DME P2 DEV: 6.0
DME P2 Switch: +∆
To Next Page
Loading...
Need help?
General
