23
FT-847 O
PERATING
M
ANUAL
(19) FAST
Switch
Pressing this switch toggles the transceiver between
“high speed” and “slow speed” tuning rates for the
MAIN VFO
Tuning Dial, the
SUB-TUNE
knob, the
MEM/VFO CH
knob, and the
UP/DOWN
switches.
The “
FAST
” icon will appear on the display panel when
the fast-tuning mode has been selected.
(20) MAIN VFO
Tuning Dial
This large knob is the main tuning dial for the trans-
ceiver, controlling the frequency of the Main VFO.
Clockwise rotation of the dial increases the frequency,
while counter-clockwise rotation of the dial decreases
the frequency.
The tuning steps may be changed via the Menu sys-
tem. The default tuning steps are shown below:
(21) SHUTTLE JOG
™
Control
The outer “
SHUTTLE JOG
™
” control is concentric
to and slightly behind the
MAIN VFO
Tuning Dial.
The
SHUTTLE JOG
™
allows fine or rapid frequency
excursions with just a slight turn of your hand. Rotat-
ing this control slightly to the left or right initiates slow
tuning in a downward or upward direction, respec-
tively. The more you rotate this spring-loaded control,
the faster the Main VFO frequency will be changed.
(22) LOCK
Switch
This switch locks the settings of the
MAIN VFO
Tun-
ing Dial,
SHUTTLE JOG
™
ring, and the
SUB-
TUNE
knob. Other front panel switches may also be
locked out, using Menu #27 (see page 87).
(23) SATELLITE Mode
Indicators
These indicators provide satellite operating mode in-
formation, and they become illuminated based on mode
selections made via the switches immediately below
the indicators (see sections
(24)
~
(27)
below for de-
tails).
[
RX
] (
HOME
)
In this mode, the
MAIN VFO
Tuning Dial is
used to control the
downlink
(receive) frequency
during satellite operation.
[
TX
] (
VFO/M
)
In this mode, the
MAIN VFO
Tuning Dial is
used to control the
uplink
(transmit) frequency
during satellite operation.
[
TRACK
] (
A
u
B
)
In this mode, the Main and Sub VFOs are
“slaved” so that they change frequency
together
when the
MAIN VFO
Tuning Dial is rotated. In
the “T
RACK
” mode, either “normal” or “inverted”
transponders may be utilized, depending on the
selection made by the [
N/R
] switch (see below).
[
N/R
] (
SPLIT
)
This switch selects the transponder operating
mode during satellite operation. In the “
N
” (Nor-
mal) mode, increasing the Main VFO frequency
also causes an identical increase in the Sub VFO
frequency.
In the “
R
” (Reverse) mode, increasing the Main
VFO frequency causes an identical
decrease
in
the Sub VFO frequency.
(24) HOME
[
RX
]
Switch
This switch is used to recall the “H
OME
” memory chan-
nel on each band.
In the S
ATELLITE
mode, pressing this switch causes the
Main VFO to be designated as the
Receive
(downlink)
VFO; in this case, the Transmit (uplink) frequency will
be controlled by the
SUB-TUNE
knob.
(25) VFO/M
[
TX
]
Switch
Pressing this switch changes frequency control be-
tween the Main VFO and the Memory systems. Re-
peatedly pressing this switch causes frequency con-
trol to toggle between these two systems.
In the S
ATELLITE
mode, pressing this switch causes the
Main VFO to be designated as the
Transmit
(uplink)
VFO; in this case, the Receive (downlink) frequency
will be controlled by the
SUB-TUNE
knob.
(26) A
u
B
[
TRACK
]
Switch
Pressing and holding in this switch for ½ second causes
the contents of the Main VFO to be copied into the
Sub VFO, so that the two VFOs’ contents will be iden-
tical.
In the S
ATELLITE
mode, pressing this switch activates
the “VFO Tracking” mode, whereby the Main VFO
and Sub VFO are “slaved” under control by the
MAIN
VFO
Tuning Dial.
Front Panel Controls & Switches
Mode
Available Steps
Default
N
ORMAL
F
A S T
Step
SSB/CW
0.1, 1, 10 Hz
1, 10, 100 Hz
1 Hz/10 Hz
AM/FM
10 Hz
100 Hz
10 Hz/100 Hz