OPERATION
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(800-872-1872) or visit our website at www.ritron.com 7
SCAN CHANNEL OPERATION
Channel scanning allows you to listen to broadcasts on your
radio channels. The JMX “D-Series” (except JMX-111D) will
scan all channels programmed into the radio with the exception
of the NOAA Weather Channel, refer to page 9.
How Scanning Works
Using the Channel Selector button, select the Scan Channel.
The radio sounds the Scan Beep, and then repeatedly checks
each channel in the scan list. The channel display will show the
channel numbers as they are scanned.
When receiving a call on a channel being scanned, the radio
will stop scanning to let you hear communications on that
channel. After the transmission has ended the radio will pause
before it resumes scanning to allow you time to respond.
When transmitting from the Scan Channel, the handheld will go
to the last channel on which a signal was received, then
transmit. After you release the PTT the radio will pause to
allow time for a response, and then resume scanning.
Busy Channel Blocking
If one of the channels in the scan list is so busy that you want
to temporarily block it out, press the Channel Selector button
while the radio is stopped on the channel to be blocked and
hold it until scanning resumes. The blocked channel will now
be skipped in the scan list. The blocked channel will be
returned to the scan list if the radio is turned off, or when the
radio channel is changed using the Channel Selector button.
Channel 1 cannot be blocked.
Last Channel Scanned Alert Tone
When changing channels with the Channel Selector button, an
alert tone will sound to indicate the last channel that received a
message when the radio was scanning. This will identify the
channel on which the last message was received, and allow
uninterrupted transmission on that channel without the
constraints of scanning. You can then press the Channel
Selector button to return to the Scan Channel.
Priority Scanning (Optional)
The JMX-144D / 444D / 446D radios can be optionally
programmed for priority scanning. Priority Scan allows
you to periodically monitor a Priority Channel, even if the
radio has stopped on another channel. This will prevent
missed calls on the primary operating channel when in
scan mode.
With Priority Scan enabled:
• The first channel in the scan list is the Priority Channel.
• The radio checks the Priority Channel every two
seconds to check for activity. This time is
programmable and can be set for 1 - 8 seconds.
• The radio can be programmed to transmit only on the
Priority Channel when scanning, if desired.
• The radio can be programmed to sound a Priority
Channel Beep whenever the radio receives on the
Priority Channel when scanning.
See your Ritron dealer or contact Ritron directly for PC
programming of this option.
(15 paginas)
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