Yaesu FT-847, Руководство по эксплуатации

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45
FT-847 O
PERATING
M
ANUAL
RF S
PEECH
P
ROCESSOR
O
PERATION
The RF S
PEECH
P
ROCESSOR
provides a
s i g n i f i c a n t i n c r e a s e i n y o u r
transmitter’s
average power output.
To activate the RF S
PEECH
P
ROCESSOR
,
press the [ PROC/KEYER ] switch.
The “
PROC
” icon will appear on the
display.
To deactivate the RF S
PEECH
P
ROCES
-
SOR
, press the [
PROC/KEYER
] switch again.
Note : The R
F
S
PEECH
P
ROCESSOR
is disabled during Sat-
ellite operation.
V
OICE
M
ONITOR
For monitoring your own voice during SSB transmis-
sion, the V
OICE
M
ONITOR
feature may be used.
To activate the V
OICE
M
ONITOR
, press
the [ MONI ] switch. The “
MONI
” icon
will appear on the display. Press the
[
MONI
] key once more to disable the
V
OICE
M
ONITOR
.
The monitoring level may be adjusted
via Menu #20 if the monitoring level is too loud
or too soft for your operating needs. To do this,
use the following procedure:
•
Press the [
MENU
] button to activate the Menu
mode.
‚
Rotate the
SUB-TUNE
knob to select Menu #20
(“
MONI-VOL
”).
ƒ
Rotate the MEM/VFO CH knob to set a higher or
lower M
ONITOR
volume level; you cannot transmit
while in the Menu mode, so you will need to pick
an arbitrary value at first.
„
Press the [
MENU
] button to exit the Menu mode.
…
Now transmit to check the M
ONITOR
volume level.
If it still is not set to the correct level, repeat the
above procedure.
Note : The M
ONITOR
feature is disabled on SSB during
Satellite operation, as it would make reception
of your own downlink signal difficult. The M
ONI
-
TOR
is, however, available during CW Satellite
operation, to eliminate coordination problems
in sending caused by the propagation delay to
and from the satellite.
SSB T
RANSMISSION
OPERATION
SSB TX F
REQUENCY
R
ESPONSE
(“C
ARRIER
P
OINT
”) A
DJUSTMENT
Although your FT-847 is carefully aligned at the fac-
tory for the best average frequency response for most
human voices, it is possible that your voice (or your
microphone) may have particular characteristics (ex-
cessive treble or bass) which may warrant minor ad-
justments to the TX C
ARRIER
P
OINT
. This feature, pro-
vided via Menu #92 (USB) and #93 (LSB), is analo-
gous to the receiver’s IF S
HIFT
feature, but it is applied
to your own voice in the transmit mode.
Utilization of Menu items #92 and 93 requires that
you first activate the “Extended Menu” function via
Menu #42. Press the [
MENU ] key to enter the Menu
mode. Next, rotate the
SUB-TUNE
control until Menu
#42 (“
EXTEND
”) appears. Rotate the
MEM/VFO CH
control until the display changes from “
OFF
” to “
ON
.”
The Extended Menu is now active; press [
MENU
]
again to return to normal operation.
To adjust the USB C
ARRIER
P
OINT
:
•
First select the USB mode, then connect a dummy
load to the current antenna jack.
‚
Switch on the V
OICE
Monitor, and press the
microphone’s PTT switch.
ƒ
Listen to your voice, making careful observations
as to the treble and bass characteristics.
„
Now enter the Menu mode by pressing the [
MENU
]
key. Rotate the
SUB-TUNE
control until Menu #92
(“
USB-CAR
”) is selected.
…
Rotate the
MEM/VFO CH
control to change the
transmit passband characteristics: rotating in the
positive direction increases the treble response,
while selecting a negative number will increase the
bass response.
†
The C
ARRIER
P
OINT
scale is in increments of 10 Hz,
so a setting of “
3
” represents a passband shift of
+30 Hz.
‡
Exit the Menu mode by pressing the [ MENU ] key.
ˆ
Now transmit again, listening to your voice char-
acteristics. If the response is acceptable, the proce-
dure is complete. If further adjustments must be
made, repeat the above process.
This adjustment may also be performed for LSB via
Menu #93. The two settings need not be identical; for
example, if you use 75 and 40 meters (bands where
LSB is used) primarily for local work, you may desire
a slightly lower frequency response for a more “mel-
low” sound, while setting a slightly higher frequency
response for DX work on 20 meters and higher fre-
quency bands on the USB mode.