Icom IC-i7410 - Microphone Connector Information; Installation and Connections; Microphones; D Hm-36

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INSTALLATION AND CONNECTIONS
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■ Microphone connector information
(Front panel view)
y GND (PTT ground)
t PTT
r Squelch switch
q Microphone input
w +8 V DC output
e Frequency up/down
i 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. A DC volt-
age is applied to pin 1 for microphone operation.
Use caution when using a non-Icom microphone.
■ Microphones
D HM-36
q
w
q
w
r
e
D SM-50 (option)
q
w
q
w
r
e
q UP/DOWN SWITCHES [UP]/[DN]
Push to change the frequency or memory channel.
 •Whileholdingdown,thefrequencyormemorychannel
number continuously increases or decreases.
 •Whileinthesplitfrequencymode,andholdingdown
[XFC], push to change the transmit frequency.
 •The[UP]/[DN]switchcanbeusedasakeypaddleif
the “MIC Up/Down Keyer” item is set to “ON” in the
Keyer Set mode. In such case, the frequency and mem-
ory channel cannot be changed using the [UP]/[DN]
switches. (p. 43)
 •Youcansett
he dot-dash polarity of the [UP]/[DN]
switch in the “Paddle Polarity” item in the Keyer Set
mode. When “Normal” is selected, [UP] sends a dash,
and [DN] sends a dot.
w PTT SWITCH
Hold down to transmit; release to receive.
e PTT LOCK SWITCH (available on only the SM-50)
Push to toggle between transmit and receive.
r LOW CUT SWITCH (available on only the SM-50)
Push to cut out the low frequency components of
input voice signals.