E F Johnson Company 2425720 사용자 설명서

2-10 

Viking™ VP600 Portable Radio Operating Manual

In conventional mode only if programmed, the user can see the signal strength of the last 
call displayed as a signal strength indicator icon. At the start of every call, the radio will 
take an RSSI measurement and set a corresponding signal strength indicator icon. The call 
must be long enough for a full measurement (40 ms) or the measurement will be ignored. 
The signal strength indicator icon from the last call will stay displayed until a new call is 
received. The icon signifies the strength of the last received call not the current signal 
strength. If the radio goes out of range because it did not receive a beacon within the 
Inactivity Duration, it will automatically set the signal strength indicator to Out Of Range.

Information is communicated to users of the Viking Portable radio using signal tones and 
alerts and by LED signaling. Table 2.5 shows the information and signaling tones 
supported by the Viking Portable radio. If you are viewing a PDF of this manual on a 
computer equipped with a sound card, click on the Message Name to hear the tone.

Table 2.4 RSSI Threshold Indicators

No Measurement Taken

< Out of Range

Out of Range > Fair

Fair > Good

Good > Excellent

> Excellent 

Table 2.5 Tones for the Viking Portable Radios

Action Performed

Indicates that an action has been 

performed.

1500Hz for 50ms, 0Hz for 50ms, 

1000Hz for 50ms, 0Hz for 50ms, 

1500Hz for 50ms

Alert

Used for transmit time-out warnings 

and for failsoft alert.

1500Hz for 50ms

Alert Site Trunking

Used to notify the user that they have 

entered site trunking.

1500Hz for 50ms

Alert Tone Keypress

Used to indicate the tone volume 

during tone volume adjustment.

1000Hz for 100ms

Bad

Used to indicate a problem with the 

user’s input.

300Hz for 100ms

Bad Condition

Indicates loss of sync in roaming 

diagnostic mode.

300Hz for 150ms, 0Hz for 50ms 

(played 3 times)