Rf Attenuator And Preamplifier Settings; Mute Volume And Squelch - AOR SR2000A Instruction Manual

Squelch level control:

6-1-5 RF attenuator and preamplifier settings

The ATT key selects the antenna attenuation level (by reverse contrast). Using the dial
Knob, you can choose between 0dB, 10dB, 20dB. Validate your choice by pushing the
MHz key.
The RF preamplifier can be toggled on and off by pressing the ATT key for one second.
The change is reflected on the screen by RF:ON and RF:OFF.
Change the RF attenuator settings:
Press the ATT key.
Rotate the dial knob to select the desired setting.
Press the MHz key to validate the entry.
Depending on the attenuator setting, general noise floor level on the display may increase.
To toggle the RF amplifier on and off, press and hold the ATT key for one second.

6-1-6 Mute volume and squelch

Muting the AF level can be done in two ways. Either by pressing the FUNC key followed by
the VOL key, or pressing the VOL key for one second. In both cases, the volume level display
turns red to indicate that the sound is muted. To undo the mute, repeat the same steps.
The squelch can also be muted by pressing the FUNC key followed by the SQUELCH key,
or pressing the SQUELCH key for one second.
When muted, the squelch display turns red. To undo the mute, repeat the same steps.
Press the SQUELCH key.
Rotate the dial knob to select the desired volume level.
The squelch level can be set from level 00 to 72.
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