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Page 63FT-950 OPERATING MANUAL
[
CLAR/VFO-B
]
Knob
[
MENU
]
Button
[
SELECT
]
Knob
ADJUSTING THE SSB TRANSMITTED BANDWIDTH (SSB MODE)
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 for SSB transmission. The bandwidth may be
varied by the operator, to provide different levels of fidelity or talk power, according to your preferences.
Here are the steps to adjust the SSB transmit bandwidth:
1. Press the
[
MENU
]
button momentarily to engage the
Menu.
2. Rotate the
[
SELECT
]
knob to select Menu item “064
J3E TX BPF”.
ADVICE:
Press the
[
SELECT
]
knob to toggle the Menu item
display between “064 J3E” and “TX BPF”.
3. Rotate the
[
CLAR/VFO-B
]
knob to select the desired
bandwidth. The available selections are 1-30 (100-
3000 Hz), 1-29 (100-2900 Hz), 2-28 (200-2800 Hz),
3-27 (300-2700 Hz), and 4-26 (400-2600 Hz). The
default is 3-27 (300-2700 Hz). A wider bandwidth will
provide greater fidelity. A narrow bandwidth will com-
press the available transmitter power into less spec-
trum, resulting in more “talk power” for DX pile-ups.
4. Press and hold in the
[
MENU
]
button for one second
to save the new setting and exit to normal operation.
ADVICE:
The Transmit Monitor function is a very helpful way
to confirm the effect changing the bandwidth will have
on fidelity. By Pressing the
[
MONI
]
button and then
adjusting the
[
MONI
]
knob for a comfortable listening
level while you are transmitting, you will be able to
hear the difference in sound quality as you make
changes.
When the optional DMU-2000 Data Management Unit
is connected, you may verify the effect of your adjust-
ments of the transmitted bandwidth by observing the
Audio Scope on the “Oscilloscope” page.
QUICK POINTS:
The higher fidelity associated with wide bandwidth will
be particularly enjoyable on the low bands during local
rag-chew QSOs.
ENHANCING TRANSMIT SIGNAL QUALITY
65


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