Icom IC-775DSP Instruction Manual page 22

19
2 INSTALLATION AND CONNECTIONS
Wi FSK and AFSK (SSTV) connections
To connect a terminal unit, TNC or scan converter,
refer the diagram below.
Y, For RTTY operation
Y The optional 250 Hz CW narrow filters may not
p pass RTTY signals. Be sure to select the appro-
g priate IF filters corresponding to the signal width.
FSK (RTTY) connection
Use RTTY mode for
operation
[ACC(1)] socket
(Rear panel view)
AFSK and SSTV connections
Use SSB or FM mode
for operation
[ACC(1)] socket
(Rear panel view)
Y For (DSP) equipped type
When operating AFSK or SSTV in SSB mode, the
transmit 2.5 kHz low-pass filter is activated at its
default setting. (p. 42) `
According to the AFSK system, modulation may
become shallow or not occur at all. Turn the PSN
modulation OFF (p. 41) to cancel the transmit filter
: in this case.
AMA A DM MVM
Terminal unit (TU) or
Terminal Node Controller (TNC)
Ground (GND)
PTT
SQUELCH input*
RTTY keying
* Connect the SQUELCH line when required.
Terminal Node Controller (TNC)
or Scan converter
AFSK output
Ground (GND)
PTT
SQUELCH input*
* Connect the SQUELCH line when required.
AFSK and SSTV connections via microphone connector
Use SSB or FM mode
_ for operation
[MIC] connector
(Front panel view)
Terminal Node Controller (TNC)
or Scan converter
AFSK output
Ground (GND)
PTT
SQUELCH input*
* Connect the SQUELCH line when required.
e When connected to the [MIC] connector, [MIC] and
% [AF] control adjustment is required. When connected
Y to the [MIC] connector in a DATA mode, turn the front
St anel data input, in H-set mode, ON. (p. 47)