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海上ラジオ Garmin VHF 720のPDF オーナーズマニュアル＆リファレンスをオンラインで閲覧またはダウンロードできます。Garmin VHF 720 43 ページ。 Waterproof marine radios
Garmin VHF 720 にも：仕様 (2 ページ)

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:

Setting the

Squelch

Threshold

Signal At Level 5

Only Signals

Stronger Than

Level 5

Will Be Heard

EXAMPLE of THRESHOLD

SET AT LEVEL 5

Selected Squelch Level

Up/Down Keys

Squelch (SQ) Key