Setting the squelch threshold – Garmin VHF 720 User Manual

Page 23

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17

GETTING

STARTED

Setting the

Squelch

Threshold

NOTE: You will notice an “A” indicator adjacent to

some channel numbers in the USA and Canadian

bands. These are simplex channels (transmitting and

receiving on the same frequency) while the Interna

tional counterpart is a duplex channel (transmitting

on one frequency while receiving on another.)

Setting the Squelch Threshold

Setting the Squelch is important for reception
of signals you want to hear. There are ten
threshold levels, from 0, which allows all signals
to be received, to 9, which allows only the
strongest signal to be heard through the speaker.
The diagram in Figure 5 demonstrates how setting
the threshold level allows you to hear only the
signals you desire, while weaker, unintelligible
signals are not heard.

To set the Squelch threshold:

1. Adjust the Squelch to the lowest setting by

pressing and holding the Squelch (SQ) key, then

pressing the DOWN arrow key repeatedly until the

display indicates “L0”. You should hear static. If you

hear a voice transmission, change to another

channel and repeat this step. (Figure 5)

2. While holding the Squelch (SQ) key down, use the

UP arrow key to increase the squelch level to “L1”.

If no static is heard, you have set an acceptable

squelch threshold level. If you hear static, then

increase to the next threshold level, repeating the

process until unwanted static is eliminated.

Release the SQ key to return to your selected

channel. The squelch setting is universal for all

channels, but it may require resetting from time to

time

NOTE: During squelch adjustment, Tri-Watch,

Scan, and Weather Alert are suspended.

1

2

3

4

5

FIGURE 5

EXAMPLE of THRESHOLD

SET AT LEVEL 5

Selected Squelch Level

Up/Down Keys

Only Signals
Stronger Than
Level 5
Will Be Heard

Signal At Level 5

Squelch (SQ) Key

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