2-11
■
Microphone connector information
(Front panel view)
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.
2
INSTALLATION AND CONNECTIONS
[MIC]
FUNCTION
DESCRIPTION
Pin No.
w
+8 V DC output
Max. 10 mA
e
Frequency up
Ground
Frequency down
Ground through 470
Ω
r
Squelch open
“Low” level
Squelch closed
“High” level
y
GND (PTT ground)
t
PTT
r
Squelch switch
q
Microphone input
w
+8 V DC output
e
Frequency up/down
u
GND
(Microphone ground)
i
AF output (varies with [AF])
D
HM-36
w
q
q
PTT SWITCH
Hold down to transmit; release to receive.
w
UP/DOWN SWITCHES [UP]/[DN]
Change the selected readout frequency or memory
channel.
• Holding down continuously changes the frequency or
memory channel number.
• While holding down [XFC], the transmit readout frequen
-
cy can be controlled while in the split frequency mode.
• The [UP]/[DN] switch can simulate a key paddle. Preset
in the keyer set mode. (p. 4-12)
Содержание IC-7700
Страница 1: ...HF 50 MHz TRANSCEIVER i7700 Instruction Manual A 6937H 1EX y Printed in Japan 2011 2015 Icom Inc ...
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