Icom IC-756 - Manual (Page 22)

To connect a terminal unit, TNC or scan converter,
refer to the diagram below.
For RTTY operation
The optional 250 Hz CW narrow filters may not pass
RTTY signals. Be sure to select the appropriate IF
filters corresponding to the signal width. (p. 28)
AF input
Ground (GND)
PTT
SQUELCH input*
RTTY keying
* Connect the SQUELCH line when required.
Terminal unit (TU) or
Terminal Node Controller (TNC)
[ACC(1)] socket
(Rear panel view)
1
2
3
4 5
6 7
8
AFSK output
AF input
Ground (GND)
Ground (GND)
PTT
SQUELCH input*
* Connect the SQUELCH line when required.
Terminal Node Controller (TNC)
or Scan converter
[ACC(1)] socket
(Rear panel view)
1
2
3
4 5
6 7
8
AF input
Ground (GND)
AFSK output
PTT
SQUELCH input*
* Connect the SQUELCH line when required.
Terminal Node Controller (TNC)
or Scan converter
[MIC] connector
(Front panel view)
1
2
3
4
5
6
7
8
When connected to the [MIC] connector, [MIC
GAIN] and [AF] control adjustment is required.
19
2
INSTALLATION AND CONNECTIONS
■ FSK and AFSK (SSTV) connections
FSK (RTTY) connection
Use RTTY mode for
operation
AFSK and SSTV connections
Use SSB or FM mode
for operation
AFSK and SSTV connections via microphone connector
Use SSB or FM mode
for operation