Operation Manual

ManualsBrandsIcom ManualsAudioIC-7800 (upgrade version)

4-23

Functions for the PSK decoder indication

q Push a band key to select the desired band.

w Push [RTTY/PSK] to select PSK.

• After PSK mode is selected, push [RTTY/PSK] for 1 sec.

to toggle between PSK and PSK-R modes.

•“PSK” or “PSK-R” appears.

e Push [F-3•DECODE] to display the decoder screen.

• When tuned into a PSK signal, decoded characters are

displayed in the RX contents screen.

r Push [F-2•HOLD/CLR] to freeze the current screen.

•“ ” appears while the function is in use.

• Push [F-2•HOLD/CLR] again to release the function.

t Push [F-2•HOLD/CLR] for 1 sec. to clear the dis-

played characters.

• “” indicator disappears at the same time when the

hold function is in use.

y Push [F-3•AFC/NET] to turn the AFC function ON.

•“ ” appears.

• If a PSK signal is received within the AFC tuning range,

the decoder automatically tunes into the signal and the

offset frequency is displayed.

• The AFC tuning range is set to ±15 Hz as the default.

Optional ±8 Hz setting is available in PSK decode set

mode. (p. 2)

u Push [F-3•AFC/NET] again to turn the NET function

ON.

•“ ” appears additionally.

i Push [F-3•AFC/NET] for 1 sec. to add the offset fre-

quency to the displayed frequency.

o Push [F-7•WIDE] to toggle the PSK decode screen

size from normal and wide.

• S/RF meter type during wide screen indication can be

selected in display set mode. (pgs. 3-11, 12-11)

!0 Push [F-6•MAIN/SUB] to toggle the MAIN and SUB

band for decode operation.

• Dualwatch function (p. 5-16) should be ON when SUB

band is selected for decode operation.

!1 Push [EXIT/SET] to close the PSK decode screen.

Setting the decoder threshold level

Adjust the PSK decoder threshold level if some char-

acters are displayed when no signal is received.

q Call up the PSK decoder screen as described

above.

w Push [F-5•ADJ] to select the threshold level setting

condition.

e Rotate the main dial to adjust the PSK decoder

threshold level.

• Push [F-6•DEF] for 1 sec. to select the default setting.

r Push [F-5•ADJ] to exit from the threshold level set-

ting condition.

NOTE: The AFC function may not tune the signal

properly when a weak PSK signal is received.

• AFC/NET indications

“AFC” and “NET” indicators Offset frequency

HOLD

[F-3•AFC/NET] [F-6•MAIN/SUB] [F-7•WIDE]

[F-2•HOLD/CLR]

[RTTY/PSK] [EXIT/SET]

RECEIVE AND TRANSMIT