HYT TC-610P Service Manual page 22

TC-610P Service Manual
(5 selectable levels) gets to the preset value, transmission is initiated, and the voice signal enters the
bansband processor (AN29160) via the processing path.
2）If it is a non-VOX earpiece (namely an earpiece with PTT), Q201 is cut off, and MIC_EN switches
from low level to high level. However, Q202 does not form a loop circuit (maintaining the cut-off
status) and EXT-PTT is still at low level. In this case, a non-VOX earpiece is determined by MCU.
The radio will return to normal mode, and will transmit if the PTT key on the earpiece is held down.
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