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 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 Private (Unit-To-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
5-2 Viking Portable 600 Radio Operating Manual
Conventional Mode Features
5.1.2 Manual Channel Monitoring
The automatic monitoring just described may occasionally disable the transmitter when
the channel is not in use, such as if the repeater has extended hang time. In this case, you
may not want to use automatic monitoring, but monitor the channel manually as follows:
Busy Indicator - With scanning disabled, note if the multi-function indicator on the
front panel is steady green. If it is steady green, a carrier is being detected, so the
channel may be busy (see Monitor Mode, following). If it is not, the channel is not
being used and a call can be transmitted.
Monitor Mode - There may be times when a busy condition is indicated even though
no one is using the channel. Monitoring should then be performed by disabling Call
Guard squelch (or talkgroup ID detect on Project 25 channels). This is usually done by
selecting the Monitor Mode (see following) or by the Normal/Selective option button or
menu parameter (see Section 5.4.6, "Selective Squelch Code Select (CTCSS / DCS /
NAC)").
5.2 Monitor Mode
The monitor mode unsquelches the receiver and monitors the channel even if a carrier is
not detected. Other features of this mode are as follows:
• Call Guard (CTCSS/DCS) squelch is disabled on analog channels and NAC and
talkgroup ID detect are disabled on P25 (conventional) channels.
• Signaling-dependent Busy Channel Lockout options for Tone/NAC and P25 status are
overridden (see next section). (Noise option is not overridden: Monitor mode disables
the protocol-signaling events that the Busy Channel Lockout option Tone/NAC/Status
depend on, but not carrier events.)
• Scanning temporarily halts.
The Monitor Mode operates as follows:
1 To monitor the transmit frequency for activity before transmitting, briefly press the
Monitor option button or select the Monitor menu “Tx Channel” parameter. The
icon is then displayed to indicate the monitor mode. The receiver unsquelches and noise
is heard even if carrier not present.
2 To monitor the receive frequency instead, press and hold the Monitor option button
until a tone sounds (based on programming). This can be used, for example, to improve
reception if intermittent squelching is making a weak message difficult to understand.
3 To disable the monitor mode and return to normal operation, press the Monitor option
button again or select the Monitor menu “Off” parameter.
Preliminary Draft 3/9/12