8
SQ (Squelch) Level
Six SQ levels are set in the radio and can be selected by PC software.
The audio signal will continuously transmit. Levels are shown as below:
Level 0 is for fully open mute.
Level 1
：
0.15uV
Level 2
：
0.25uV
Level 3
：
0.35uV
Level 4
：
0.45uV
Level 5
：
0.55uV
CTCSS/DCS
To help block out unwanted calls to your radio, the SD-270 can be programmed to
set CTCSS/DCS code. When enabled, receiver can only receive RF signal with the
same CTCSS/DCS code of the transmitter to avoid interference from unwanted
signals. For fast lock times, the CTCSS/DCS is not recommended for high speed data
transmission.
Channel Scan
The radio enables to detect the channels by initiate scanning mode. Scanning mode
is optional and programmable. Four scan modes are provided as shown below:
0 ---------normal scan with carry only
1 ---------normal scan, Carry with tone
2 ---------priority scan, Carry only
Summary of Contents for SD-274
Page 1: ...SD 270 Series Data Radio User Manual January 2017...
Page 14: ...13...
