I Fsk Operation; I Cw Operation - Icom IC-M802 Instruction Manual

4
RECEIVE AND TRANSMIT
I Functions for receive (continued)
D D Clarity control
Voice signals received from other stations may be dif-
ficult to receive. This may sometimes happen if a sta-
tion is transmitting slightly off frequency. In such
cases, you can compensate by using the clarity con-
trol.
When receiving weak signals with adjacent strong
signals or noise, the AGC function may reduce the
sensitivity. In this situation, the AGC function should
be deactivated.
q Push [F] then [RX
and OFF.
• "CLAR" and shifting value appear

I CW operation

The transceiver has the following CW keying features
selectable in set mode as described on p. 00.
➥ Full break-in
(receiving is possible while transmitting)
➥ Semi break-in
(automatic transmission with keying)
➥ OFF
(manual transmission is necessary before keying)
q Connect a CW keyer or an external electronic
keyer to the [ACC] socket as shown at right.
w Select the desired channel to operate CW mode.
e When the selected channel is not in A1A mode,
push [MODE
DIM
r Operate the CW keyer to transmit a CW signal.
NOTE: CW mode is not available in some versions
and CW narrow can be selected in set mode (p. 00)
when an optional filter is installed (already built-in
to the GMDSS version).

I FSK operation

The transceiver has FSK and J2B modes for FSK op-
eration— use F1B when using the built-in oscillator;
use J2B when using an AFSK terminal unit.
q Connect an FSK terminal unit to the [ACC] socket
as shown at right.
w Select the desired channel to operate FSK mode.
• FSK ITU channel group, Ch 4001 to Ch 2540, are avail-
able depending on version.
e Push [MODE
] several times to select F1B or J2B.
DIM
r Operate the FSK terminal unit.
NOTE:
➥ FSK shift frequency and FSK polarity can be ad-
justed in set mode (p. 00)
➥ Some transceivers may operate 1.7 kHz higher
than the IC-M802's J2B mode even when the same
displayed frequencies are in use.
12
] to switch the function ON
CLAR
] several times to select "A1A."
[CH]
w Rotate [CH] to improve the audio readability.
• Adjustable between ±150 Hz in 10 Hz steps.
CW key connection
To pin 1
6
7
8
3 1
4
5
2
To pin 2
FSK terminal unit connection
To pin 3
To pin 1
7 6
8
3 1
5 4
To pins 2, 5
2
[RX ] [F]
CLAR
Ground
Tx/Rx control
FSK keying
AF ground
AF input
FSK terminal unit