E F Johnson Company 2425M70 Benutzerhandbuch

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Pressing the TX PWR switch toggles the power setting. The new level is flashed in the 
display when this switch is pressed as “HI POWER” or “LOW POWER”. If selectable 
power is not permitted on the current channel or system, the fixed power level is flashed 
and no power change occurs. The selected power level is permanent until it is manually 
changed again. The power levels are set at the factory or when the radio is tuned using the 
PCTune™ software.

The various alert tones that sound are described in Section 10.1. These tones can be 
enabled and disabled if the TONE option switch is programmed. To turn all tones OFF, 
press this switch and “TONE OFF” is displayed. Then to turn all tones on again, press it 
and “TONE ON” is displayed. If this switch is not programmed, tones are fixed in the ON 
or OFF condition by programming. Alert tones can be disabled depending on 
programming.

The Alert Tone volume can be adjusted relative to the volume control setting. This is done 
by programming and also by the user if the TN VOL option switch is programmed. 
Relative levels of –170 to +170 can be set with “0” the default setting. A minus value 
decreases the tone volume and a plus value increases it. The user adjusted level 
permanently overrides the programmed level if applicable.

The radio can be installed so that the vehicle ignition switch as well as the front panel 
power switch of the radio control power. This is done by connecting the accessory cable 
ignition switch input to the vehicle ignition switch. Refer to the Viking VM600 
Installation Manual for more information. A power-off delay of up to 510 minutes can 
then be programmed, or this feature can be disabled by programming “Infinite” delay so 
that there is no automatic power-off.

Both the ignition switch and the power switch must then be on for radio power to turn on. 
The delay can be overridden at any time by turning power OFF using the front panel 
power switch or turning the ignition switch back ON.

This turn-off delay can allow calls to be received or the horn alert to be active for a time 
after the ignition switch is turned OFF. At the same time, advantages of ignition switch 
control are used such as preventing the battery discharge that may occur if the radio is left 
ON for an extended period.