Power on-off switcha^olume control, Squelch control, Rotary channel selector – ADI Systems AT-201 User Manual

Page 8: 0 external speaker jack: s, External microphone jack: m, Antenna jack: ant, Transmission/battery indicator, Function button, Ptt button

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© Power On-OFF SwitchA^olume Control

This is to turn the power on and off and to control the
volume. Rotate the control clockwise to turn the power

on,and rotate it clockwise further to increase the volume.

The Squelch Off button should be held depressed or the

Squelch Control rotated fully counterclockwise while
controlling the volume.

© Squelch Control

This is to control white noise. Rotate it clockwise slowly

and set the control where the noise stops.

NOTE:

(1) DO not rotate the control clockwise too far.

(2) The control should be placed where the white noise is not

heard during following operations; Scanning, Dual-Watch,

Battery-Save, Paging and Code Squelch.

(3) Adjust the control with the channel which is not receiving

the signal.

© Rotary Channel Selector

This is to select the transmit/receive frequency. It is also

used to change the tone frequency, channel step and

memory address number. Rotate the selector clockwise

to increase the frequency and counterclockwise to lower

it. The interval by which the frequency changes is referred

to as "Channel Step". The Channel Step which is

initially set to 10kHz can be changed to 5, 12.5, 20, 25 or

50kHz. (Refer to Changing the Channel Step, contents 14).

0 External Speaker Jack: S

This is to connect Microphone/Speaker or Head Set with

PTT. Any other external speaker with 8 ohm load or an

earphone can be connected. A built-in speaker is disabled
when an external speaker is connected to this jack.

© External Microphone Jack: M

This is to connect Microphone Speaker Head Set with PTT.

This is a BNC connector to connect the attached helical

antenna.

This indicator lights up in red when the transmitter is

keyed. When weakened batteries, it becomes darker
recommending battery replacement.

Special functions are available by pressing each button

on the front panel with the function button held depressed.

® PTT Button

For transmission, press this button and speak into the

m i c r o p h o n e . Release the PTT button to receive.

When operated with Head Set with PTT, press the PTT

button on Head Set to transmit.