DDM BALANCE CHECK ADJUSTMENTS

TM 11-6625-2975-12

2-4.

OPERATING PROCEDURES. (CONT)

Release

key.

13.

14.

Press STD key once.

15.

Repeat steps 1 through 12 for other rf carrier frequencies.

DDM BALANCE CHECK ADJUSTMENTS

EL9LX043

NOTE

The following procedure is typical for discussion of test set operation and can be varied

as required during actual receiver testing.

The following procedure applies to Iocalizer and glide slope modes only.

1. Using STEP D RDL D DDM key, enter standard DDM of .046.

NOTE

If RDL/DDM/MOD display flashes on and off, press and hold CLEAR key until display

stops flashing. Then, repeat step 1 and enter correct DDM.

If DDM step has been entered correctly, RDL/DDM/MOD display will show .046.

U/L (150 Hz) indicator is lit to indicate direction DDM will go when DDM is changed using

STEP D RDL D DDM key, slewing keys, on DATA ENTRY keys.

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