Icom IC-77 Instruction Manual page 7

E Microphone (HM-36)
oda he
@ UP/DOWN SWITCHES [UP]/[DN] (p. 6)
— Change channels.
— Continuous pushing to step through the channels.
— Cancel the scan function.
Microphone information
e Microphone connector
© Microphone input
© +8 V DC output
(3) Frequency up/down
j; | Function > |
Frequency up Ground
O Squelch open "LOW" level
=>> Description —
~ +8V DC output | Max. 10 mA
Frequency down Ground through 470 Q>
Squelch closed "HIGH" level
PANEL DESCRIPTION 1
@® PTT SWITCH [PTT] (p. 10)
Push and hold to transmit. Release to receive.
Front panel view
AF output
@ GND (microphone ground)
© GND (PTT ground)
(©) PTT
(4) Squelch switch
CAUTION: DO NOT short pin 2 to
ground, since this can damage the internal
Circuit.
Microphone plug