Yaesu FT-847, Руководство по эксплуатации

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50
FT-847 O
PERATING
M
ANUAL
FM T
RANSMISSION
OPERATION
FM operation is permitted on the bands above 29 MHz,
and the FT-847 provides a wealth of features for AM
simplex and repeater operation. Several of these fea-
tures may be customized for each band via the Menu
system.
Use the “N
ARROW
” mode for operation on 29 MHz, as
the permitted deviation below 30 MHz is one-half of
that permitted on VHF or UHF. To do this, press the
[
NAR
] key while operating in the FM mode.
Please be certain to respect other amateurs by observ-
ing the operating bandplans in your country, and do
not use the FM mode in the sub-bands recognized as
being reserved for SSB/CW “weak-signal” work.
These sub-bands typically may include the frequency
ranges 50.0 ~ 50.5 or 51.0 ~ 51.125 MHz, 144.0 ~
144.5 MHz, and 432.0 ~ 432.6 MHz, but may be
slightly different in your country. Satellite sub-bands
to avoid are 29.3 ~ 29.5 MHz, 145.8 ~ 146.0 MHz,
and 435.0 ~ 438.0 MHz. The communications effec-
tiveness of the amateur service requires the coopera-
tion of all licensees, and operating bandplans have
evolved so as to minimize interference among opera-
tors using incompatible emission modes such as FM
and SSB.
“C
HANNELIZED
” F
REQUENCY
N
AVIGATION
You may find that the
MAIN VFO
Tuning Dial is some-
what inconvenient for FM operation, since most all
stations operating in the FM mode use a “channelized”
frequency, which is generally a multiple of either 5
kHz or 6.25 kHz. Therefore, we recommend the use
of the
MEM/VFO CH
knob for FM frequency tuning.
The steps utilized by the
MEM/VFO CH
knob in the
FM mode may be set independently for HF and for
each VHF and UHF band. Therefore, if you live in an
area where 10 kHz steps are used on 29 MHz and 50
MHz FM, and 5 kHz steps are used on 144 MHz, and
25 kHz steps are used on 430 MHz, you may wish to
set these (or steps appropriate for your area) using
Menu #5:
l
Set the operating frequency to anywhere in the
HF range (160 ~ 10m).
l
Press the [ MENU ] button to activate the Menu
mode of operation.
l
Rotate the SUB-TUNE knob to select Menu #05
(“
FM-CH
”).
l
Rotate the
MEM/VFO CH
knob to select a new
frequency step. The available steps are 5/6.25/
10/12.5/15/20/25 kHz.
l
Press the [
MENU
] key to exit the Menu mode.
l
Now set a frequency anywhere in the 50 MHz
band.
Press the [
MENU
] button to activate the Menu
mode, and repeat the above process to select
the desired steps on 6 meters. Most likely, you
will want to choose either 5 kHz or 10 kHz steps,
depending on where you live.
l
Repeat this procedure for the other bands by set-
ting a frequency on 144 MHz, then selecting
the desired step. Press [
MENU
] to exit the Menu
mode, move to 430 MHz, then re-enter the Menu
and set the desired step on the 70 cm band.