D Sm-50 (Option) - Icom IC-7410 Instruction Manual

(Front panel view)
i AF output (varies with [AF])
q Microphone input
w +8 V DC output
e Frequency up/down
r Squelch switch
D HM-36
q
w

D SM-50 (option)

q
r
w
u
GND
(Microphone ground)
y GND (PTT ground)
t PTT
e
INSTALLATION AND CONNECTIONS
[MIC]
FUNCTION
Pin No.
w
+8 V DC output
Frequency up
e
Frequency down
Squelch open
r
Squelch closed
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.
q UP/DOWN SWITCHES [UP]/[DN]
Push to change the frequency or memory channel.
number continuously increases or decreases.
[XFC], push to change the transmit frequency.
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)
he dot-dash polarity of the
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.
DESCRIPTION
Max. 10 mA
Ground
Ground through 470 ˘
"Low" level
"High" level
short pin 2 to ground as this
[UP]/[DN]
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22