E F Johnson Company 2425795 Benutzerhandbuch

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Viking™ VP600 Portable Radio Operating Manual

When the volume control buttons or soft buttons are used, the number of steps (ticks) 
required to change the volume from the minimum level to maximum level is 
programmable for 10 to 50. For example, if “20” is programmed, there are 20 adjustment 
steps from minimum to maximum volume. 

The radio can also be programmed so that volume control is also be disabled by the 
Keypad Lock feature.

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 Portable radios. 

The relative volume level can be determined by the position of the index on the volume 
knob or by a reference signal as follows:

• If a key press tone is enabled, a short tone sounds when a key is pressed. Tones and 

audio can differ depending on how it is programmed.

• If a conventional channel is selected and the Monitor option button or menu parameter 

is programmed, pressing that button unsquelches the receiver and either voice or 
background noise is heard (see Section 5.2). If a SmartNet/SmartZone or P25 Trunking 
channel is selected, the receiver cannot be manually unsquelched.

The Viking Portable Clock feature allows the user to display and set the date and time in 
the desired format on the radio screen. This feature uses the hardware clock so that updates 
do not impact radio timing.

On the radio, you can activate the “Set Time” feature, allowing you to do the following:

• Set time format (AM, PM, 24HR)

• Set time (hour, minute)

• Set date format (YMD, MDY, DMY)

• Set date (year, month, day)

 (Menu) saves changes made in the set time feature.