OPERATION
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4
As long as the Volume Up button is held down the
volume will increase and the display will indicate the
volume level as 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.
FIG-2: VOLUME LEVEL INDICATOR
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.
NOTE:
JBS-146M-A turns on automatically any time power is
applied to the radio.
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
butt
on 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 - 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
Feature
” section on page 10 for details.
RECEIVE
To hear calls from other users - adjust the volume as desired.
The radio can only receive broadcasts while the Push-To-Talk
button is not being pressed. Whether or not you hear these
broadcasts depends upon the squelch settings.
There are three standard squelch modes that can be used in the
JBS MURS base station.
Carrier Squelch
lets you hear all broadcasts on your channel
strong enough for the radio to detect, and silences noise.
Tone Squelch
uses t
he QC or DQC “tone squelch” format
available on the JBS-146M. 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.
