E F Johnson Company 2425M80 Benutzerhandbuch

Draft 02 - Sep 1 2015

3-2

The relative volume setting can be determined using a reference tone as follows:

• If the key press tones are enabled (see Section 4.6) and if so programmed, a short tone 

sounds when an option switch is pressed or the Select switch is pressed or rotated.

• If a conventional channel is selected, take the microphone off-hook and if someone is 

talking, voice may be heard. If the MON (Monitor) option switch is programmed (see 
Section 5.2), pressing it unsquelches the radio and either voice or background noise is 
heard. If a SMARTNET/SmartZone or P25 trunked channel is selected, the radio cannot 
be manually unsquelched.

The minimum volume level that the volume control can select can be programmed. This 
can be used to prevent missed messages caused by unintentionally turning the volume 
down too far. Relative levels of 0-255 can be set in steps of 1 (“0” sets the lowest 
minimum volume).

This setting is applicable to Viking mobile radios with Viking Remote Control Heads. 

The Viking mobile radio can be programmed so that it will not play a tone in the following 
cases:

• Unprogrammed button pressed.

• Unprogrammed toggle switch activated.

• Switched to an unprogrammed channel.

To turn power off, press the ON-OFF/Volume knob.

A Soft Power Down feature can be programmed to prevent radio power from being turned 
off by accidentally pressing the on-off/volume knob. The display message portion of the 
display stops updating. The user is able to receive, transmit, and use function buttons, but 
the display message will not change. If the channel is changed the Zone/Channel 
indication will update.

The user can power the radio completely down by pressing the option button programmed 
for this purpose (F2, F6, or Select button).