24
2
INSTALLATION AND CONNECTIONS
2
■ Microphone connector information
(Front panel view)
y GND (PTT ground)
t PTT
r Main readout squelch switch
q Microphone input
w +8 V DC output
e Frequency up/down
i Main readout AF output
(varies with [AF])
GND
(Microphone ground)
u
[MIC]
Pin No.
FUNCTION DESCRIPTION
w
+8 V DC output Max. 10 mA
e
Frequency up Ground
Frequency down Ground through 470 ˘
r
Squelch open “Low” level
Squelch closed “High” level
CAUTION: DO NOT short pin 2 to ground as this
can damage the internal 8 V regulator. DC voltage
is applied to pin 1 for microphone operation. Use
caution when using a non-Icom microphone.
■ Microphones
D HM-36
q UP AND DOWN SWITCHES [UP]/[DN]
Change the selected readout frequency or memory
channel.
• Holding down continuously changes the frequency or
memory channel.
• While holding down [XFC], the transmit readout
frequency can be controlled while in the split frequency
mode.
• The [UP] and [DN] switches can simulate a key paddle.
Preset in the keyer set mode. (p. 49)
w PTT SWITCH
Hold down to transmit, release to receive.
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