15
4
BASIC OPERATION
Duplex communication uses two different frequencies for trans-
mitting and receiving. Generally, duplex is used in communi-
cation 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
Setting
[
q
Push [SET•LOCK] to enter set mode.
w
Push [SET•LOCK] or [S.MW•MW] 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•LOCK] 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 [V/MHz• SCAN] then rotate [DIAL] to change the fre-
quency 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 [TS•MODE] or any switch below the display to exit
set mode.
D
D
Operation
q
Set the receive station frequency
(repeater output frequency)
.
w
Push [MONI•T/T-SCAN] to monitor the transmit station fre-
quency
(repeater input frequency)
directly.
[MONI•T/T-SCAN]
Frequency shifts
the offset frequency
[DIAL]
[S.MW•MW]
[SET•LOCK]
■
Duplex operation
Содержание IC-R1500
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