MAINTENANCE MANUAL
IFR 6000
2-2-3
Page 23
Aug 1/06
(14) XPDR Pulse Characteristics - ATCRBS
TEST EQUIPMENT: Oscilloscope
Pulse 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. Connect the Detector directly to the ANT port.
2. Connect the other end of the Detector to Scope CH1.
3. Connect the UUT SYNC port to Scope CH2.
4. Set Scope to trigger off CH2 at 2V and CH1 to 50-ohm impedance, invert on.
5. Press the SETUP key to display the SETUP-XPDR screen.
6. Verify the RF PORT shows ANTENNA. If necessary, change it to ANTENNA.
7. Press the DIAG Key to display the XPDR DIAGNOSTICS screen.
8. Use the key to highlight the ATCRBS MODE A line.
9. Press the SELECT Soft Key to display the XPDR DIAG-ATCRBS MODE A screen.
10. Set up the UUT as follows:
RFLVL: -3dBm
PRF: 100
SLS: 0dB
11. Press the RUN TEST Soft Key.
12. Use the Scope to verify the following:
Pulse spacing P1-P2 equals 2.0µS ± 25nS
Pulse spacing P1-P3 equals 8.0µS ± 25nS
Pulse width of P1 equals 0.8µS ± 50nS
Rise time of P1 is between 50nS and 100nS
Fall time of P1 is between 50nS and 200nS
13. Press the STOP TEST Soft Key.
14. Set SLS to OFF
15. Press the NEXT TEST Soft Key to display the XPDR DIAG-ATCRBS MODE C
screen.
16. Press the RUN TEST Soft Key.
17. Use the Scope to verify the following:
Pulse spacing P1-P3 equals 21.0µS ± 25nS
18. Press the STOP TEST Soft Key.
19. Press the NEXT TEST Soft Key to display the XPDR DIAG-ITM MODE A screen.
20. Press the RUN TEST Soft Key.
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