User's Manual
Table Of Contents
- Features
- Controls and Display
- General Operation
- Radio-wide Features
- 4.1 Viewing Radio Information
- 4.2 Option Keys / Buttons
- 4.3 Feature Enable / Disable
- 4.4 Menu Mode
- 4.5 Function Recall
- 4.6 Time-Out Timer
- 4.7 Home Channel Select
- 4.8 Power Output Select
- 4.9 Alert Tone Select
- 4.10 Surveillance Mode
- 4.11 Scanning
- 4.12 Global Positioning System (GPS)
- 4.13 Radio Service
- 4.14 RSSI
- 4.15 Fire Ground Mode
- Conventional Mode Features
- 5.1 Monitoring Before Transmitting
- 5.2 Monitor Mode
- 5.3 Busy Channel Lockout
- 5.4 Call Guard Squelch
- 5.5 Penalty Timer
- 5.6 Conversation Timer
- 5.7 Repeater Talkaround
- 5.8 Displaying Transmit / Receive Frequency
- 5.9 Emergency Alarm and Call
- 5.10 Conventional Mode Scanning
- 5.11 Standard Conventional Calls
- 5.12 ANI Signaling Options
- 5.13 Project 25 Mode Features
- 5.13.1 Digital Unit ID
- 5.13.2 Talkgroup ID
- 5.13.3 Network Access Code
- 5.13.4 Out of Range (EFJohnson Conventional) Indication
- 5.13.5 Automatic (EFJohnson Conventional) Registration
- 5.13.6 P25 Group Calls
- 5.13.7 Talkgroup Scan
- 5.13.8 P25 Unit Calls
- 5.13.9 P25 Conventional Telephone Calls
- 5.13.10 Call Alert
- 5.13.11 Call History
- 5.13.12 Messaging
- 5.13.13 Status Messaging
- 5.13.14 P25 Packet Data
- 5.14 Keypad Programming
- 5.15 Text Messaging
- 5.16 Fire Ground Mode
- SmartNet / SmartZone / P25 Trunked Features
- 6.1 Analog and Digital Operation
- 6.2 Standard Group Calls
- 6.3 Unit Calls
- 6.4 Telephone Calls
- 6.5 Call Alert
- 6.6 Messaging
- 6.7 Sending Status Conditions
- 6.8 Emergency Alarm and Call
- 6.9 Failsoft Operation
- 6.10 SmartNet / SmartZone / P25 Trunked Scanning Features
- 6.11 Dynamic Regrouping
- 6.12 SmartZone and P25 Trunking Unique Features
- 6.13 Zone Password
- Messages
- Secure Communication (Encryption)
- Data Features
- Service Information
Viking™ VP600 Portable Radio Operating Manual 5-3
Conventional Mode Features
The Normal/Selective function disables Call Guard squelch and P25 group ID detect but
not scanning and P25 NAC detect (see Section 5.4.6, "Selective Squelch Code Select
(CTCSS / DCS / NAC)").
5.3 Busy Channel Lockout
The Busy Channel Lockout feature (also called Transmit Disable on Busy) automatically
disables the transmitter if the channel is busy when the PTT switch is pressed. When the
transmitter is disabled by this feature, “Busy” is displayed, a busy tone sounds, and the
transmitter is disabled.
If Busy Channel Override is permitted by programming, it is possible to transmit even
when the transmitter is disabled by this feature. Release the PTT switch and then quickly
press it again (within one second).
5.4 Call Guard Squelch
Tone or digital Call Guard squelch (also called CTCSS/DCS signaling) can be
programmed on each conventional analog transmit and receive channel in any order
desired. The reverse burst and turn-off code are always transmitted and also detected on
channels programmed with Call Guard squelch.
The Call Guard squelch feature eliminates distracting messages intended for others using
the channel. This is done by using a subaudible tone or digital code to control the squelch.
This tone or code is unique to a user or a group on that channel. This tone or code is
transmitted with the voice signal but is not heard because it is in the subaudible range and
is attenuated by a filter. Call Guard squelch must be used in both the transmitting and
receiving radio to be functional.
5.4.1 Call Guard Squelch Enable / Disable
The Normal/Selective option button (if programmed) or menu parameter can be used to
disable receive Call Guard squelch on analog channels or talkgroup ID code detection on
P25 channels. When selective squelch is disabled, “Squ Normal” is flashed in the display,
and when it is enabled, “Squ Selectiv” is flashed.