RF POWER SWITCH POSITIONS AND USES

TM 11-5820-890-10-8

RF PWR (RF POWER)

This control allows the operator to

adjust the level of radio frequency

(RF) power and related range of

operation. Basic rule is to use the

least amount of RF power needed

communicate

with

other

stations.

Figure 5-5. RF PWR Switch

RF POWER SWITCH POSITIONS AND USES

POSITION

PURPOSE

Provides voice operational range of approximately 200-400 meters. This

(Low Power)

positron IS used extensively by units in closely deployed situations. Actual

range iS dependent upon weather, position, line of sight, Interference, and

various other factors.

Provides voice operational range of approximately 400 meters to 5 kilometers.

(Medium Power)

Manpack radio operators can conserve battery life by selecting lowest effective

RF power setting.

Provides voice operational range of approximately 5 to 10 kilometers and data

(High Power)

transmission range of 1 to 5 kilometers, the latter depending upon data rate

(BPS) as well as the other factors cited under LO above.

This setting applies only to vehicular long range radios using a power amplifier.

(Power Amplifier)

Approximate voice range provided is 10 to 40 kilometers; data range of about 5

to 25 kilometers, dependent upon the data rate being used and various other

factors.

DIM CONTROL

This control enables the operator

to adjust the level of brightness of

the RT display. Turning the knob

clockwise increases the level of

light; turning it counterclockwise

dims the display light. When using

night vision goggles, DIM is to be

set fully counterclockwise.

Figure 5-6. DIM Control

VOL/WHSP

The

Volume/Whisper

control

enables the operator to adjust the

audio level.

Turning knob

clockwise increases level and

counterclockwise decreases it.

The whisper feature is activated by

pulling out on the VOL knob. In the

WHSP position, the operator can

speak softly (whisper) and the

message will be heard at a normal

Figure 5-7. VOL/WHSP

audio level.

5-8