Yaesu FT-847, Руководство по эксплуатации

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52
FT-847 O
PERATING
M
ANUAL
R
EPEATER
O
PERATION
FM “repeater” stations are usually located on top of tall mountains or hills, allowing mobile, portable, and other-
wise low-power stations to extend their communication range significantly. The flexible operating features of the
FT-847 make repeater work simple and enjoyable.
OPERATION
FM T
RANSMISSION
Automatic Repeater Shift
The ARS (Automatic Repeater Shift) feature, active
on the 144 and 430 MHz bands, automatically acti-
vates and sets the direction (upward or downward) of
the repeater shift function.
The ARS feature may be activated or de-activated in-
dependently on the 144 MHz and 430 MHz bands,
using Menu items #14 (144 MHz) and #15 (430 MHz).
The default condition for the ARS is “O
N
” for both
bands. See page 85 for details on disabling the ARS,
if desired.
Note : With the ARS turned On, the repeater shift icon
will not initially appear when you enter a fre-
quency directly from the keypad. However, if you
move the Main tuning Dial or
MEM/VFO CH
knob, or initiate scanning in either direction,
the ARS feature will be activated, and the ap-
propriate repeater shift will be applied.
Manual Repeater Shift
For repeater operation on 29 or 50 MHz, or on the
144/430 MHz bands when ARS is disabled, it is easy
to activate or change the repeater shift manually.
•
While operating in the FM mode (see
previous section), press the keypad’s
[
1
(
RPT
)] key. The “
–
” icon will
appear on the display, indicating a
downward repeater shift.
‚
Press the [ 1 ( RPT )] key once more
to change the direction of the re-
peater shift to the
upward direction.
The “
–
” icon will change to “
+
” on
the display.
ƒ
Press the [ 1 ( RPT )] key once more
to disable the shift and CTCSS en-
coder, and return to
simplex opera-
tion. The “
+
” icon will disappear
from the display.
„
During operation, you may wish to
check the input frequency to the re-
peater, to see if the other station is
strong enough to be worked on sim-
plex. To do this, press the [
2 ( REV )]
key on the keypad; the uplink and downlink fre-
quencies will be reversed.
Setting the Repeater Shift
The repeater shift has been set, at the Yaesu factory, to
the value most likely to be correct for your location.
However, you may have the need to change the re-
peater shift especially on a band like 50 MHz, where
several shifts may be popular even within the same
country (e.g. 500 kHz, 1 MHz, and 1.7 MHz in the
United States). Check with your local repeater coordi-
nator or a repeater guide for confirmation of the ap-
propriate shift in your area.
The default repeater shift may be changed indepen-
dently on each of the four FT-847 bands on which re-
peater operation is authorized. The setting of the re-
peater shift is accomplished using Menu items #16
through #19 for the 29 MHz through 430 MHz bands,
respectively. Here is an example of how to change the
repeater shift to 1.70 MHz on the 50 MHz band:
l
Press the [ MENU ] button to activate the Menu
mode of operation.
l
Rotate the
SUB-TUNE
knob to select Menu #17
(“
50M-RPT
”).
l
Rotate the MEM/VFO CH knob to set the value to
1.70 MHz. The available range of repeater shifts is
0 ~ 99.99 MHz.
l
Press the [
MENU
] key to exit the Menu mode.
An identical procedure is used to set the shifts on the
other repeater bands. Remember that this procedure
only sets the
amount of the repeater offset; the direc-
tion of the repeater shift (“
+
” or “
–
”) is set using the
[ 1 ( RPT )] key.
Note : If you wish to access a single repeater which
uses a shift different from the default shift, it is
not necessary to follow the above procedure
(which will make operation on other repeaters
inconvenient). For the one repeater using a non-
standard split, use the “Split Memory” capa-
bility of the
m e m o r y
system. See
page 72 for
details.