BridgeComSystems BCM-220, User Manual

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CHAPTER 5: Basic Operation
TX
1. Press PTT and face the microphone before talking. The LED should turn RED
indicating TX. To ensure good voice quality, the distance between your
mouth and the microphone should be between 2.5 and 5 cm.
2. Release PTT to put radio back in receive (RX).
RX
1. Upon power up, the radio defaults to a pre-programmed or default RX
Frequency.
2. When radio is receiving a valid call, the speaker un-mutes and the green
LED lights.
3. Certain conditions may be required for the radio to un-mute and receive.
For example, proper CTCSS/DCS signal decode might be required in order
for the radio to un-mute. In addition, the receiving signal must be strong
enough to break the squelch (SQL) setting.
4.
CTCSS/DCS signaling is a special squelch protocol and can help to ignore
unwanted calls on the channel. CTCSS/DCS is programmed on a per
channel basis. To communicate using CTCSS/DCS, other radios must have
the same signaling in their radios.
Working Modes
• Frequency Mode (VFO)
To change to VFO mode press the SELECT knob button or press the “A”
button on the DTMF microphone. In this mode you can use the DTMF mic
keypad to enter the desired RX Frequency on which you would like to
communicate. You can also step up/down in frequency by pressing the ‘B’
and ‘C’ buttons on the DTMF mic or simply rotating the SELECT knob. The
step size up and down is determined by FREQ STEP SIZE programming.
• Memory Mode
To change to MEMORY mode press the SELECT knob button or press the “A”
button on the DTMF microphone. In this mode you rotate the SELECT knob
to step through the pre-programmed channels. The names of the channels
will be displayed. You can also step through the pre-programmed channels
by using the “B” and “C” on the DTMF microphone.
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