MARKER BEACON INTERFERENCE CHECK

TM 11-6625-2975-12

OPERATING PROCEDURES. (CONT)

24.

NOTE

The following step produces middle marker beacon tone (1300 Hz). (See view A

above.)

2. Press and hold 1300 Hz key until it lights.

NOTE

400 Hz key lamp automatically goes off when another marker beacon tone is selected.

The following step produces outer marker beacon tone (3000 Hz). (See view B above.)

3. Press and hold 3000 Hz key until it lights.

NOTE

1300 Hz key lamp automatically goes off as outer marker beacon signal is selected.

All marker beacon tones maybe removed if desired.

MARKER BEACON INTERFERENCE CHECK

NOTE

Standard marker beacon ground station frequency is 75.000 MHz. Test set is capable of

producing rf frequencies from 74.6 to 75.4 MHz to provide generation of interference -

type signals.

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