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TX2720 INSTRUCTION MANUAL PAGE 5

OPERATION – GENERAL FUNCTIONS

VOLUME ON/OFF

Rotate the volume control clockwise past the

‘click’ to turn the TX2720 ON. Continue to

advance the control clockwise to increase the

volume. Rotate the control counter-clockwise to

turn the radio OFF.

SQUELCH CONTROL

The Squelch control is used to eliminate the

background noise when there are no signals

present. To adjust the Squelch, ﬁrst rotate it fully

counter-clockwise until the background noise is

heard, then slowly rotate it clockwise until the

noise just disappears. If there are signals on the

channel, you should wait until the channel is

clear before adjusting the Squelch (or select a

quiet channel).

Once adjusted, the receiver will remain quiet

as long as there are no signals present, but an

incoming signal will override the Squelch and be

heard in the speaker. As the control is advanced

further clockwise the Squelch threshold is

progressively increased and stronger incoming

signals are needed to override it. To receive very

weak signals or to disable the Squelch, simply

turn the control fully counter-clockwise.

CHANNEL SELECTION

Select the required channel using the rotary the

channel switch or by brieﬂy pressing the or

keys on the microphone. The selected channel is

displayed on the LCD.

DISPLAY BRIGHTNESS

The LCD has two brightness levels to provide

suitable lighting for day or night use. The default

setting is bright.

The desired brightness level can be selected via

the ‘Dim’ switch located on the front panel.

TRANSMITTING

To transmit, press the PTT button on the

microphone. Hold the microphone 2-6 cm from

your mouth and slightly to one side so your voice

does not project directly into the microphone.

Speak at a normal voice level. Your TX2720 has

a built-in speech processor which automatically

controls the level of your transmitted voice. It is

not necessary to raise your voice or shout into

the microphone.

NOISE LIMITER

The NLkeyactivatesanextremelyeffectivenoise

limiter circuit which helps to eliminate most

electrical impulse interference caused by engine

ignition systems etc. This allows clearer reception

of weak signals even under noisy electrical

conditions.

When the NL key is selected, ‘N/L’ is displayed

on the LCD.

SCANNING

The TX2720 is ﬁtted with a Scan function that

allows a group of user selected channels to be

scanned for activity. Your TX2720 has a Scan

memory which remembers which channels you

would like to Scan. By default your TX2720 is

supplied with all channels in the Scan memory.

To See Which Channels are Presently in the

Scan Memory

Select each channel one by one using the rotary

channel switch or by pressing the

or keys

on the microphone and check to see if

is displayed to the lower right of the channel

number.

is displayed, the channel is in the Scan

memory, otherwise the channel is not in the

Scan memory.

To Add or Remove a Channel from the

Scan Memory

Select the required channel, then press and

hold the SCAN key until a beep is heard. If

appears to the lower right of the channel

number, the channel has been added to the

Scan memory, otherwise it has been removed.

DISPLAY FUNCTION

Channel Number

Transmit Indicator

Busy Indicator

RX Signal Strength

Scan

D/W

Dual Watch

PRI

Priority Channel

Scan Memory

N/L

Noise Limiter

1 2 3 4 5 6 7 8 9 10 11 12

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Gme TX2720 Manuale Utente Pagina 5

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