E F Johnson Company 2425795 사용자 설명서
5-2
Viking™ VP600 Portable Radio Operating Manual
Conventional Mode Features
5.1.2 Manual Channel Monitoring
The automatic monitoring 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:
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.
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)").
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:
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.)
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.
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.
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.