Owner`s manual

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
page 3
ON-OFF / VOLUME ADJUST
To turn on the radio - press the On/Volume Up button.
The radio will sound the Channel Beep. If the radio turns
on to the Scan Channel it will emit the Scan Beep. The
radio will turn on to the channel that was selected when
it was last turned off.
To adjust the volume - press the volume up or the volume
down button until you reach the desired level. The
display will show the volume level on a 0-9 scale as long
as the volume button is pressed, and you will hear any
received broadcasts on the channel.
To turn off the radio - press and hold the Off/Volume
Down button until a two tone "turn-off" beep is heard.
For instant turn-off, press the PTT button while holding
the Off/Volume Down button.
CHANNEL SELECTION
To change channels - press and release the Channel
Selector button. The radio will increment the channel, and
the Channel Display will show the new operating
channel. If the highest channel number is selected and
you press the Channel Selector button, the radio resets
to channel 1 and the Channel Beep is heard on the
speaker.
If the Scan Channel is selected - the radio will sound the
Scan Beep and the Channel Display will rapidly flash the
channel numbers as they are scanned. If a signal is
received the channel display will indicate the channel
number, and when the received signal is removed the
radio will wait briefly, sound the Scan Beep, then
scanning will resume as normal.
If the Weather Channel is selected - on a VHF radio the
display will light a single segment of the display that
indicates which of the seven NOAA frequencies is
monitored. See the "NOAA Weather Radio" section on
page 7 for details.
RECEIVE
To hear calls from other users - adjust the volume as
desired. The radio can receive broadcasts as long as
the Push-To-Talk button is not pressed. Whether or
not you hear these broadcasts depends upon the
squelch settings.
There are four squelch modes that can be used in the
"Display Series" base radio.
 Carrier squelch lets you hear all broadcasts on
your channel strong enough for the radio to detect,
and silences noise.
 Tone squelch uses one of the QC or DQC tone
squelch formats available on the "Display Series"
base radio. This allows you to screen out
on-channel broadcasts that do not carry the
correct code programmed for the radio.
 2-tone paging can be used in conjunction with
either carrier or tone squelch to block out all calls
except those sent specifically to your radio. When
the unique 2-tone sequence programmed into the
radio is decoded, the radio will emit a series of ring
tones similar to a telephone.
 No squelch disables all squelch operation and
noise will be heard on the speaker. This allows
you to hear even the weakest broadcasts on your
channel.
Once a squelch type has been selected by the user,
all channels will operate in that mode. The "Display
Series" radio will operate in tone squelch mode when
it is 1st turned on.
QC AND DQC TONE CODES
Tone codes filter out static, noise and reduce
unwanted "chatter" on radio channels. When you
operate on a frequency with a tone code, you
screen out most interference. This allows you to
communicate with less interference and to hear
only those users in your radio group.
IMPORTANT! All radios in the talk group must
operate on the same frequency and tone code.
To activate carrier squelch - simultaneously press
both of the volume buttons and hold briefly before
releasing. When carrier squelch is on, the radio emits
a double beep. The radio will now let you hear all
broadcasts on your channel.
To activate tone squelch - simultaneously press both
volume buttons and hold briefly before releasing.
When tone squelch is turned on, the radio sounds one
beep. You will only hear broadcasts that carry the
same QC or DQC code programmed into your radio.
To activate no squelch - simultaneously press both of
the volume buttons and continue to hold them down.
About 3 seconds after the beep (or double beep), the
radio will start beeping repeatedly. This means that
squelch is turned off. Release the buttons. To restore
squelch, press and hold both of the volume buttons
until the radio sounds a beep or double beep.
FIG-2: VOLUME LEVEL INDICATOR
As long as the Volume Up button is held
down the volume will increase and the
display will indicate the volume level as a
number between 0 and 9.
When the Volume Down button is held down the
volume will decrease and the display will indicate the
volume level as a number between 9 and 0.