Yaesu FTdx5000MP, Руководство по эксплуатации

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Page 92 FT
DX
5000 O
PERATING
M
ANUAL
U
SING
CW R
EVERSE
If you experience a difficult interference situation, where an interfering station cannot readily be eliminated, you may wish
to try receiving using the opposite sideband. This may move the interfering station’s frequency in a direction that may lend
itself more readily to rejection.
1. To start, let’s use a typical example where you have set
the CW mode (using the default “USB” injection) on
the VFO-A receiver.
2. Now be sure your mode selection is still set for the
VFO-A register, and press the [ CW
] mode button once
more. The “ ” and “ ” icons will appear in the
display, indicating that the “LSB” injection side has
now been selected.
3. When using Dual Receive, press the [ B
] button, which
is located to the upper left of the Main Tuning Dial
knob. Then press the [
CW
] button to engage CW Re-
verse on the VFO-B receiver, in exactly the same way
as for the VFO-A receiver.
4. Press the [
CW
] mode button once more to return to
the normal (USB) injection side and cancel CW Re-
verse operation (the “
” and “ ” icons will
appear in the display).
N
OTES
:
When CW Reverse is engaged, the Tuning Offset In-
dicator action will concurrently be reversed.
When the incoming signal pitch tone is properly
aligned, the central red marker lights up whether or
not CW Reverse is engaged.
CW C
ONVENIENCE
F
EATURES
In the illustration, Figure “
A
” demonstrates the nor-
mal CW injection setup, using the USB side. In
Figure “
B ”, CW Reverse has been engaged. LSB-
side injection is being used to eliminate interfer-
ence.
The beneficial effect of switching sidebands can
be clearly seen in this example.
RX Passband
RX Passband
Carrier
Carrier
QRM
QRM
Normal CW
( )
CW Reverse
( )
USB
LSB
A
B
[CW] Button
[PICTH] Knob
[A], [B] Button
A
UDIO
P
EAK
F
ILTER
1. Where you have set the CW mode on the VFO-A re-
ceiver, press the (
VFO-A )[ CONT/APF ] button briefly,
to activate the APF (Audio Peak Filter) which provides
a very narrow audio bandwidth. The peak position of
the APF will appear in the
SUB DISPLAY- II win-
dow, and the ( VFO-A
)[
SELECT
] knob will now func-
tion as the APF knob.
2. Rotate the (
VFO-A )[ SELECT ] knob to the left or right
to reduce any interference.
3. To disable the APF, press the ( VFO-A
)[
CONT/APF
]
button briefly, again.
4. To activate the APF (Audio Peak Filter) on VFO-B,
press the ( VFO-B
)[
CONT/APF
] button briefly, and
adjust the (
VFO-B )[ SELECT ] knob to reduce any in-
terference. The peak position of the APF will be indi-
cated in the
SUB DISPLAY- III window.
(VFO-B)[SELECT] Knob
(VFO-A)[CONT/APF] Button
(VFO-B)[CONT/APF] Button
(VFO-A)[SELECT] Knob
Retune :
Shift to Lower Frequency
Zero-In
Retune :
Shift to Higher Frequency