ICOM 287900 Manuale Utente

17

4

BASIC OPERATION

Duplex communication uses two different frequencies for
transmitting and receiving. Generally, duplex is used in com-
munication through a repeater, some utility communications,
etc.

During duplex operation, the transmit station frequency is
shifted from the receive station frequency by the offset fre-
quency. Repeater information (offset frequency and shift di-
rection) can be programmed into memory channels. ((p. 16))

D

D

[

q

Push [SET•SKIP] to enter set mode.

w

Push [SET•SKIP] or [ATT•PRIO] several times until the
duplex direction setting item “OFF 

dP

,” “DUP– 

dP

” or “DUP+

dP

” appears.

e

Rotate [DIAL] to select the duplex direction, “DUP– 

dP

” or

“DUP+ 

dP

.”

r

Push [SET•SKIP] once to select the offset frequency set-
ting item.

t

Rotate [DIAL] to set the desired offset frequency within
0.000–1000.000 MHz range.

• The tuning step, selected in VFO mode, is used for setting.
• Push [MHz• TS] then rotate [DIAL] to change the frequency in

10 MHz steps, or push again then rotate [DIAL] to change the
frequency in 1 MHz steps. (Each push toggles 1 MHz, 10 MHz
or selected tuning steps.)

y

Push any switch for main band to exit set mode.

[SET•SKIP]

[DIAL] 

[ATT•PRIO]

■