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CHAPTER 5: Basic Operation
TX
1.
Using the monitor button on the left side of the radio, monitor the radio to ensure there is no
one transmitting on the chosen channel.
2.
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.
3.
Release PTT to put radio back in receive (RX).
4.
When using the earphone and VOX active, users can enjoy hands-free talking.
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
1
）
Frequency Mode (VFO) / MEMORY MODE
To toggle between VFO mode and memory mode, press the V/M key. To indicate the radio
is in memory mode for the respective band, there will be a channel number to the left of the
frequency. Pressing the A/B button switches between each band. While in VFO mode, you
can press the V/M key and this will convert to a quasi VFO/MEMORY mode where you can
step up/down through the memory channels and the channel frequencies are displayed. In
VFO mode, you can then step up/down in frequency by pressing the UP/DOWN keys. The
up/down step size is determined by the STEP size programming.
2
）
Memory Mode
To change to exclusive MEMORY mode where the ALPHA channel names are displayed, hold
down the V/M key and cycle radio power. In this mode you can press the UP/DOWN keys to
step through the pre-programmed channels. The names of the channels will be displayed.
To go back to VFO / MEMORY mode, turn the radio off and then power up the radio holding
the V/M key.
3
）
FM Mode
The BCH-270 supports an FM radio. To change to FM Radio mode press the F key followed
by the 8 key. While in this mode, you can press the UP/DOWN keys to change the FM radio
frequency.
4
）
Menu Mode
To enter Menu mode, press the
F key. Press the UP/DOWN arrow keys to choose desired
item. For more details please refer to “Menu Operations”.
