Yaesu FT DX 9000MP CONTEST - DATA MANAGEMENT OPERATION, Руководство по эксплуатации

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Page 95 FT
DX
9000MP O
PERATION
M
ANUAL
SSB/AM M SSB/AM M
SSB/AM M SSB/AM M
SSB/AM M
ODE ODE
ODE ODE ODE
TTTTT
RANSMISSION RANSMISSION
RANSMISSION RANSMISSION RANSMISSION
(E(E(E(E(E
NHANCING NHANCING
NHANCING NHANCING
NHANCING
TTTTT
RANSMIT RANSMIT
RANSMIT RANSMIT
RANSMIT
S S S S S
IGN IGN
IGN IGN
IGNAL AL
AL AL
AL
Q Q Q Q Q
UUUUUALITY ALITY
ALITY ALITY
ALITY
)))))
A
DJUSTING THE
SSB T
RANSMITTED
B
ANDWIDTH
For transmission on SSB, a default bandwidth of 2.4 kHz is provided. This bandwidth provides reasonable fidelity along
with good talk power, and is typical of the bandwidth used for decades during SSB transmission. However, the bandwidth
may be varied by the operator, so as to provide different levels of fidelity or talk power, according to your preferences.
Here's how to adjust the transmitted bandwidth on SSB:
1. Press the [
MNU ] key to engage the Menu.
2. Rotate the [ MAIN Tuning Dial
] knob so as to select
Menu Item “ MODE SSB 078 SSB-TX-BPF ”.
3. Rotate the [ CLAR/VFO-B
] knob to select the desired
bandwidth. The available selections are:
3000WB/50-3000/100-2900/200-2800/
300-2700/400-2600,
and the default is 300-2700 Hz.
4. Press and hold in the [ MNU
] key for two seconds to
save the new setting and exit to normal operation.
A A A A A
D D D D DVICE VICE VICE VICE VICE
If you have an after-market monitor connected
to the DISPLAY jack, you can verify the effect
of your adjustments of the transmitted bandwidth
by observing the Audio Scope on the “Oscillo-
scope” page on the external monitor.
The Transmit Monitor is another helpful way of
verifying the effects on fidelity of changing the
bandwidth. Press the [
MONI
] switch, then ad-
justing the [ MONI
] control for a comfortable
listening level while you are transmitting, you
will be able to hear the difference in sound qual-
ity as you make changes.
Q Q
Q Q Q
UICK UICK UICK UICK UICK
P P
P P P
OINT OINT OINT OINT OINT
The higher fidelity associated with wide band-
width will be particularly enjoyable on the low
bands, during local rag-chew QSOs.
The “3000WB” setting is a special hi-fidelity
setting, whereby the transmitted bandwidth is in
excess of 3 kHz. This selection, in conjunction
with judicious adjustment of the Parametric Mi-
crophone Equalizer (see next chapter) can pro-
vide truly outstanding fidelity and very natural-
sounding audio.
When using the wider bandwidth selections (es-
pecially “3000WB”), the apparent power out-
put from the transmitter may seem lower. This
is because the available power from the trans-
mitter is being distributed over a wider band-
width, and the power detection circuitry does
not compensate for the effect of the bandwidth
selection (it is calibrated in the default 2.4 kHz
bandwidth).
[CLAR/VFO-B] Knob
[MNU] Switch
[MAIN Tuning Dial] knob
VDD TEMP SWR BIAS