Table 3-1. Controls and Indicators (cont)

TM 11-5820-918-13

Table 3-1.

Controls and Indicators - Continued

Figure

Function

reference

Control

with a receiver, this test should be made with AC

line power on. In this case for the rechargeable

battery supply, the green BAT lamp should always

light unless the supply is fully discharged or de-

fective in which case the red/green or red lamps

will light. (Refer to paragraphs 5-26 and 5-27

for test description). For the non-rechargeable

supply, the following indications apply:

Green ON only = Batteries good (voltage

greater than 23V).

Red and green ON together = Batteries weak

but still operational - will need replacing soon.

(Voltage between 18 and 23 volts).

Red ON only = Battery condition unacceptable

(voltage less than 18 volts); indicates very

weak or dead batteries, or battery switch (13)

is off.

Red and green both OFF = This condition oc-

curs only when the AC line power is off and

the battery voltage is less than 14 volts indi-

cating that the battery switch is off or the

batteries are totally dead.

BLANKER

FREQ

A four-segment thumbwheel switch for setting fre-

quencies between 02.00 MHz and 29.99 MHz in mem-

Switches

ory to be used for blanking transmitter output. In

conjunction with CHANNEL and STORE switches,

up to 16 discrete frequencies can be placed in mem-

ory. During transmitter operation, memory is

automatically interrogated and the RF output trans-

mission is disabled for an interval of 30 kHz about

the stored blanking center frequencies.

NOTE

For transmitter prior to serial number 400100, the blanking interval

A single thumbwheel switch with digits 0 through

CHANNEL

10.

15 is used to select memory channel for storage of

Switch

blanking frequencies or readout of stored frequen-

cies. Channel selection is enabled only with PROG/

RUN switch (item 14) in PROG position.

3-10