Operation Manual

[CALL]
Main CALL button is used for adjusting the frequency of operation, voice level, menu
choices and other settings. In order to switch this CALL button on, pull the button to
unlock the mechanical call lock and then push the CALL button.
[PTT]
Push this button to send and receive signals, thus the transmission will be realized.
[VOL]
Hold down the VOL button to deactivate the voice blocking feature. This procedure
ensures that you hear very weak signals close to the background sound level. In order
to make the adjustments, push VOL button and push CALL button.
[ON/OFF]
In order to switch the radio on or o, hold down the SWITCH ON-OFF button for two
seconds.
[F/ALERT]
In order to activate alternative button function in settings such as scan and memory
writing mode, push the button. Hold down the button to activate the alarm function.
[MENU]
Push MENU button to enter the MENU. You will see dierent function settings under
the MENU section when you push CALL button. Hold down the button to activate or
deactivate the key lock. Warning! [F/ ALERT], [UV], [LIGHT/FM] functions will be invalid
when the key lock is activated.
[LIGHT/FM]
Hold down the light button to activate the torchlight feature. Hold down the FM button
to use FM radio feature.
F+[MENU]
Push [F/ALERT] button and then [MENU] button to activate Scanning Function.
[VOL]+[CALL]
Push [VOL] button and then switch on [CALL] button to adjust voice level.
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English
EXPLANATIONS OF THE CONTROL BUTTONS
HEIDER PRO5 PMR 446