CONTROLS AND INDICATORS. - TM-11-6625-2975-120026

TM 11-6625-2975-12

2.1. GENERAL. (CONT)

There are three groups of seven-segment displays, RDL/DDM/MOD, FREQUENCY, and RF LEVEL, as

well as a number of LED indicators. Displays and indicators provide a readout of test set output para-

meters and characteristics.

A POWER switch and a SELF TEST switch, both pushbutton types, are also located on the front panel.

POWER switch is used to turn test set on and off. SELF TEST switch initiates lamp test and program

check functions.

2-2. CONTROLS AND INDICATORS.

TONE SELECT KEYS

Audio tones required for testing are selected by TONE SELECT keys. Table 2-1 shows individual tone

select key functions.

TABLE 2-1. TONE SELECT KEY FUNCTIONS

FUNCTION

KEY

Selects 30 Hz variable VOR signal.

30 Hz VAR

Selects 9960 Hz FM (30 Hz reference) VOR signal.

9960 FM

Selects 9960 Hz only signal.

9960 Hz

Selects 1020 Hz audio tone (ident) signal.

1020 Hz

Selects 90 Hz ILS signal.

90 Hz

Selects 150 Hz ILS signal.

150 Hz

Selects 400 Hz (outer marker) marker beacon signal.

400 Hz

Selects 1300 Hz (middle marker) marker beacon signal.

1300 Hz

Selects 3000 Hz (inner marker) marker beacon signal.

3000 Hz

2-2