AUDIO TONE SELECTION

TM 11-6625-2975-12

2-4. OPERATING PROCEDURES. (CONT)

AUDIO TONE SELECTION

EL9LX046

Enter a Iocalizer rf carrier frequency into test set (FREQUENCY/MODE SELEC-

TION, steps 1 through 6, page 2-16).

NOTE

The next step adds 1020 Hz audio identification tone to Iocalizer signal. (The audio tone

cannot be added to glide slope signal.)

2. Press and hold 1020 Hz key until it lights.

NOTE

The next step removes 1020 Hz audio tone.

3. Press and hold 1020 Hz key until its lamp goes off.

NOTE

The next step removes 90 Hz audio modulation signal for a flag check (Iocalizer or glide

slope modes).

Press and hold 90 Hz key until its lamp goes off.

NOTE

The next step returns 90 Hz audio modulation signal.

5. Press and hold 90 Hz key until it lights.

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