Golden Spring GS-7700USB User Manual - page 6
Manual is about: VHF/UHF dual band amateur radio
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[SIDE] Key Middle (Orange color Monitor key) :
Press Monitor key to activate monitor signal。
.
[SIDE] Key Bottom (Orange color A/B VFO key) :
Press A/B VFO key to activate the change of F1 and F2
VFO operation。
.
D) Combination Key Feature :
1、Burst Tone Calling:
Press PTT Key then press Monitor Key will activate 1750Hz burst
tone calling when you release monitor key, 1750KHz burst will be off.
2、Factory Default Setting
Press
key continue to turn on, LCD will display [RESET→
VFO→ALL], then press [F] Key to confirm setting.