98
FT-847 O
PERATING
M
ANUAL
The suggestions below may help you recover from commonly-encountered operational difficulties.
In Case of Trouble . . .
C
ANNOT
T
RANSMIT
:
¦
Check to ensure that coaxial cable is connected to
correct
ANTENNA
jack.
¦
On 50 MHz, ensure that coaxial cable is connected
to the same jack as set by Menu #28 (“
SEP
” = “50
MHz A
NT
” jack; “
HF
” = “HF A
NT
” jack).
¦
Check operating mode, especially during “Split”
or Satellite operation. Be sure that the “TX” VFO’s
operating mode is properly set.
¦
Check to ensure that the operating frequency is
within an amateur band (if you see an “
E
RROR
”
message).
¦
Check to ensure that any FM repeater shift is not
causing transceiver to attempt to transmit outside
an amateur band (if you see an “
E
RROR
” message).
G
ENERAL
T
RANSMITTER
D
IFFICULTIES
:
SSB/AM Modes
¦
Check setting of
MIC
(G
AIN
)
control, to be sure it
is not fully counter-clockwise.
¦
Check position of
RF PWR
control, to be sure it is
not fully counter-clockwise.
¦
Check operation of
MOX
or
PTT
switch to ensure
that the “
TX
” icon is appearing. See previous sug-
gestions, if not.
¦
Check settings of Menu #92 (USB) and/or Menu
#93 (LSB) if you receive reports of excessively high
or low tonal pitch on your voice. Reset to “0” to
test.
¦
If using an external computer-generated “Voice
Keyer” device, ensure that both “TX Audio”
and
“PTT” cables are connected (because the FT-847
does not have “VOX” circuitry).
¦
If using
MD-100
A8X
or
MD-1
C8
Desk Microphone,
ensure that the
coiled
cord is connected to the
transceiver’s front panel
MIC
jack, and that the
(short)
straight
cable is connected to the micro-
phone tube.
CW Mode
¦
Check setting of
RF PWR
control, to ensure that
it is not fully counter-clockwise.
¦
If using external electronic keyer, ensure that key-
ing cable is connected to “Positive” (“+”) jack on
external device (not “Negative” or “Grid Block”).
¦
If continuous “Key-down” tone is present, check
to ensure that K
EY
plug in use is 3-conductor (“Ste-
reo”) type, not 2-conductor.
¦
If using computer-driven keying interface, ensure
that proper computer port (COM or LPT) and any
required “TSR” programs are enabled.
¦
If using a computer-driven keying interface, ensure
that keying cable is connected to correct port (COM
or LPT).
T
RANSCEIVER
W
ILL
N
OT
T
URN
O
N
:
¦
Be sure your power supply is turned on.
¦
If power supply does not turn on, check power sup-
ply fuse(s).
¦
Check connections from DC power supply to en-
sure both ends of cable are securely connected.
¦
Check condition of fuses in DC cable.
¦
Check for poor mechanical connection at fuse hold-
ers in DC cable.
N
O
A
UDIO
O
UTPUT
I
S
B
EING
H
EARD
:
¦
Check position of
AF
(G
AIN
) control to be sure it is
not fully counter-clockwise.
¦
Rotate
SQL
(S
QUELCH
) control fully counter-clock-
wise to ensure that audio is not being muted by
normal S
QUELCH
operation.
¦
If on FM mode, check to see if the “
DEC
” or “
DCS
”
icons are visible on the LCD, indicating that the
CTCSS Decoder or DCS are On (thus muting au-
dio). Press [
3
(
TONE
)] repeatedly until these icons
disappear.
¦
Check to see if an improper cable is connected to
the
PHONE
or
EXT SP
jack.
¦
Check to see if the [
MOX
], microphone [
PTT
], or
desk microphone [
TX/STBY
] switch is closed (the
“
TX
” icon will be visible on the LCD if this is the
case).
S
IGNALS
A
PPEAR
O
N
S-
METER
,
B
UT
P
OOR
/L
OW
A
UDIO
:
¦
Check to see if the DSP
LOW CUT
or
HIGH CUT
controls are improperly positioned. Switch DSP Off
to confirm.
¦
Check IF Shift control to be sure it is not fully clock-
wise or counter-clockwise.
¦
Check operating mode, especially during Satellite
operation. SSB, CW, and/or FM modes can easily
become reversed.
¦
IF FM signals sound distorted, be certain you are
not accidentally receiving in the AM mode.
¦
If
YF-115C
CW filter is installed, but bandwidth
is too wide, check Menu #33 to ensure that the CW
filter’s Menu setting is “On.”
¦
If operating on CW, be certain that the DSP’s Notch
filter is Off ([
D. NOTCH
] key).
[N
AR
] K
EY
D
OES
N
OT
R
ESPOND
(CW M
ODE
):
¦
Set Menu #33 to the “On” position.
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