Icom IC-M804 - D Connecting an FSK Terminal Unit; FSK Operation

11
4
BASIC OPERATION
■ FSK operation
The transceiver has F1B (FSK) and J2B (AFSK)
modes for FSK operation. Select “F1B” when using
the built-in oscillator, and select “J2B” when using an
AFSK terminal unit.
D Connecting an FSK terminal unit
1. Connect an FSK terminal unit to the [AF/MOD]
socket, as shown to the right.
2. Select the channel to operate in the FSK mode.
L ITU FSK channel group, Ch 4001 to Ch 22026, are
usable only when the “ITU FSK CH” setting is set to
“ON.” (p. 59)
3. 
Mode
is displayed in the
Software Key area.
4. Push
Mode
several times to select “F1B” or
“J2B.”
5. Operate using the FSK terminal unit.
NOTE:
• The FSK mark frequency, shift frequency, and
polarity can be selected in the FSK Settings.
(p. 59)
• Some transceivers may operate 1.7 kHz higher
than the IC-M804’s J2B mode, even when the
same displayed frequencies are in use.
15
6
9
Ground
TX/RX control
FSK keying
AF ground
AF input
FSK terminal unit
To pin 6
To pin 5
To pin 3 and 4
To pin 9
FSK terminal unit connection