Rev E TR-220 90 008 088-1
2-42
8. At any point during the test, the operator may reverse the direction of the
simulation by toggling the TO/START-FROM/STOP switch “DOWN” to the
FROM/STOP position. The scenarios will then, stop and reverse direction. The
TO display will change to FROM indicating FROM the AUT. The distance will
track from the distance selected to zero nmi and back, repeatedly. The AUT DME
indicator should be monitored to ensure correct distance and velocity
measurements where applicable.
9. To halt the scenario at a selected distance, toggle the TO/START-
FROM/STOP to the FROM/STOP position two times in succession. The
simulation will stop at that distance and remain there until the TO/START-
FROM/STOP switch is toggled to the TO/START position.
DME audio can be tested by listening to the AUT DME audio. The Test set will
transmit appropriate Morse code station IDENT signal approximately every 40
seconds. The IDENT Tone can be switched OFF or ON by toggling the IDENT
switch up.
To measure DME power and frequency, toggle the AUTO/TEST/MANUAL
switch to the AUTO position. The test set listens for the DME transmissions.
12. The DME power and frequency will be displayed.
END OF DME TESTS
108.00MHz 350K 18Hz
48.0nmi Ident FromΤ
Power Frequency
Listening . . .
Power Frequency
55dbm 1041.0Mhz
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