External Antenna Tuner Connections; Transverter Jack Information; Microphone Connector Information - Icom IC-756PROIII Instruction Manual

■ External antenna tuner connection
CONNECTING THE AH-4/AH-3
The AH-4 or AH-3 must be connected to [ANT1].
Coaxial cable (from the AH-4 or AH-3)
ANT1
Transceiver

■ Transverter jack information

When 2 to 13.8 V is applied to pin 6 of [ACC(2)], the
[XVERT] jack is activated for transverter operation
and the antenna connectors do not receive or trans-
mit any signals. (p. 20)
While receiving, the [XVERT] jack can be activated
as an input terminal from an external transverter.
While transmitting, the [XVERT] jack outputs signals
of the displayed frequency at –20 dBm (22 mV) as
signals for the external transverter.

■ Microphone connector information

(Front panel view)
i Main readout AF output
(varies with [AF]/[BAL])
q Microphone input
w +8 V DC output
e Frequency up/down
r Main readout squelch switch
Control cable
AH-4 or AH-3
Ground
u GND
(Microphone ground)
y GND (PTT ground)
t PTT
INSTALLATION AND CONNECTIONS
Long wire or optional AH-2b
Transverter jack
[MIC]
FUNCTION
Pin No.
w
+8 V DC output
Frequency up
e
Frequency down
Squelch open
r
Squelch closed
CAUTION:
DO NOT short pin 2 to ground as this
can damage the internal 8 V regulator.
NOTE: DC voltage is applied to pin 1 for micro-
phone operation. Take care when using a non-Icom
microphone.
2
DESCRIPTION
Max. 10 mA
Ground
Ground through 470 Ω
"Low" level
"High" level
18
2