Icom IC-T70A HD Instruction Manual - Page 31

Repeater And Duplex Operations

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5 REPEATER AND DUPLEX OPERATIONS ■ Repeater operation When using a repeater, the transmit frequency is shifted from the receive frequency by the frequency offset (p. 54). This is called duplex operation. It is convenient to program repeater information into memory channels (p. 29). 144.700 MHz Repeater 144.700 MHz Uplink (transmit frequency) 145.300 MHz 145.300 MHz Downlink (receive frequency) Station A Station B q S et the receive frequency (repeater output frequency). w S et the shift direction of the transmit frequency. (DUP- or DUP; see p. 26 for details.) • When the auto repeater function is in use (U.S.A. and Korean versions only), this selection and step e are not necessary. (p. 27) "DUP-"or "DUP" appears 1 Appears e P ush and hold [TONE](0) for 1 sec. 2 to activate the subaudible tone en- 3 coder, according to the repeater re- quirements. 4 • "T" appears. 5 Refer to p. 53 for tone frequency set- tings. r Push and hold [PTT] to transmit. • The displayed frequency automati- [PTT] 6 7 cally changes to the transmit fre- 8 quency (repeater input frequency). • If "OFF" appears, check the frequency 9 offset or shift direction. (p. 26) 10 While receiving While transmitting 11 12 13 14 t Release [PTT] to receive. 15 y P ush and hold [MONI](BAND) to check whether the other station's transmit signal can be directly received or not. 16 U.S.A. and Korean versions: 17 The auto repeater function uses standard values of the 18 repeater tone frequency and frequency offset. 19 24

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5
REPEATER AND DUPLEX OPERATIONS
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■
Repeater operation
When using a repeater, the transmit frequency is shifted from
the receive frequency by the frequency offset
(p. 54)
.
This is
called duplex operation. It is convenient to program repeater
information into memory channels
(p. 29)
.
Station A
Station B
Repeater
145.300 MHz
144.700 MHz
144.700 MHz
145.300 MHz
Uplink
Downlink
(transmit frequency)
(receive frequency)
q
Set the receive frequency
(repeater output frequency)
.
w
Set the shift direction of the transmit frequency.
(DUP– or
DUP; see p. 26 for details.)
• When the auto repeater function is in use (U.S.A. and Korean
versions only), this selection and step
e
are not necessary.
(p. 27)
“DUP–”or “DUP” appears
[PTT]
Appears
e
Push and hold
[TONE]
(0) for 1 sec.
to activate the subaudible tone en-
coder, according to the repeater re-
quirements.
• “T” appears.
Refer to p. 53 for tone frequency set-
tings.
r
Push and hold
[PTT]
to transmit.
• The displayed frequency automati-
cally changes to the transmit fre-
quency (repeater input frequency).
• If “OFF” appears, check the frequency
offset or shift direction. (p. 26)
While receiving
While transmitting
t
Release
[PTT]
to receive.
y
Push and hold
[MONI]
(BAND) to check whether the other
station’s transmit signal can be directly received or not.
U.S.A. and Korean versions:
The auto repeater function uses standard values of the
repeater tone frequency and frequency offset.