page 3 RITRON, INC. 1-800-USA-1-USA (1-800-872-1872)
Have questions? Call
800-USA-1-USA
(800-872-1872) or visit our website at
www.ritron.com
OPERATION
CHANNEL SCAN OPERATION
Channel scanning allows you to listen to broadcasts
on your radio channels. The JMX "D-Series" will scan
all channels programmed into the radio except the
NOAA Weather Channel.
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 communica-
tions 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.
Temporary 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, JMX-446D and JMX-444D 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.
page
5
To attach the belt clip to the radio:
Place the clip on the back of the radio case,
aligning the screw hole in the clip with the hole
in the case. Tighten the screw. See FIG-3
below.
FIG-3: BELT CLIP INSTALLATION
CAUTION:
Use only the
included
Phillips
head screw
,
because a longer
screw could
damage radio
electronics.
See "How to Turn Channel Scan On / Off" on
page 10.
CH
PHILLIPS
HEAD
SCREW
BELT
CLIP
