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21
CHAPTER 4 FRONT PANEL
4-1
EXPLANATION OF KEY, KNOB AND LAMP OF THE
MAIN UNIT
< SRG-150DN/250DN front panel of the main unit>
①
KEY PANEL
②
Front display (LCD) - indicates mode / frequency / channel / use of other functions
and etc.
③
Internal speaker
④
Microphone connection jack - connects the supplied microphone.
⑤
DISTRESS
–
is used for DISTRESS transmission.
⑥
Sensitivity - is used to adjust the GAIN of the amplifying stage of receiver.
⑦
Volume
–
is used to adjust the speaker
’
s volume.
⑧
Channel
–
is used to adjust the channel and frequency up / down.
Turn on / off the main unit.
Press for 5 seconds to send a digital distress alert signal.
Turn on / off the 1.4KHz test signal.