12
DB-750X
SwiTch BETwEEn MAin BAnD AnD SUB BAnD
SElEcTinG ThE FREqUEncY BAnD
If there is any empty channel, the adjustment will ignore it and jump to
next channel.
This transceiver can be set to RX/TX on 2 UHF bands or 2 VHF bands.
inpUT chAnnEl ThRoUGh MicRophonE nUMBER kEY
In channel mode, you can switch to desired channel by pressing three
of the microphone numeric keys (001-758). For example, input 001 for
channel 1; input 030 for channel 30; input 512 for channel 512. If the
input channel is not programmed with frequency, the transceiver will emit
a warning beep and return to last channel.
This transceiver by default shows dual
receive. A "MAIN" icon will display in the top
right of the working frequency. Transmitting is
only available on the main band. When the left
band is main band, pressing the right selector
knob will switch the right band to main band. Pressing the left selector
knob will switch the left band to main band.
1. Left band VFO: press the bottom key to switch it to VFO mode,
press the left selector knob over one second, then repeat above
operation to switch the left band between 108~180 MHz (RX:
108-174 MHz, TX: 136-174 MHz), 220~260 MHz (RX only),
350~399.995 MHz (RX only) or 400~490 MHz.
2. Right band VFO: press the top
key to switch it to VFO mode; press
the right selector knob over one second, then repeat above operation
to switch the right band between 136-174MHz, 400~490MHz.
5
Basic Operations
REcEiVinG
If the transceiver has been set at a higher squelch level, it may fail to
hear the weaker stations. If the
“BUSY”
and signal strength icon display
in left band or right band, but no station is heard, read just the squelch
level to above threshold.
In standby, both left band and right band are
able to receive. When they receive any signal,
the
“BUSY”
icon and signal strength icon will appear in the corresponding
area of the LCD, and you will hear the audio.
SqUElch oFF/SqUElch oFF MoMEnTARY
Long press of
key can be programmed as Squelch Off or Squelch
Off Momentary to monitor the weak signal.
1. Squelch Off: Hold
key until you hear a beep; the squelch is off.
Repeat the above operation to resume squelch.
2. Squelch Off Momentary: Hold
key to disable squelch; release the
key to resume squelch.
TRAnSMiTTinG
Hold
“PTT”
key; the transceiver will transmit. Hold the microphone
approximately 2~5 inches from your mouth, and then speak into the
microphone in your normal voice to get best results.
Transmitting is only available on the main band, the
“TX”
icon will display
in the top right corner of the main band frequency
.
In standby, press the microphone
to cancel squelch; press it again to
turn on the squelch.
corresponding selector knob. The channel number flashes in this
situation; the channel number will increase 10 channels by each click
of selector knob. Press microphone [
UP/dOWN
] key also to adjust the
channel.
NOTE
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NOTE
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