Using Cw Reverse; Audio Peak Filter - Yaesu FTDX5000 Series Operating Manual

CW C
ONVENIENCE
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 "
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 "
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.
Retune:
Shift to Lower Frequency
Zero-In
Retune:
Shift to Higher Frequency
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-
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-
Page 92
F
EATURES
U CW R
SING
" icons will appear in the
" and " " icons will
A P
UDIO
II win-
III window.
EVERSE
[ PICTH ] Knob
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.
Normal CW
A
( )
USB
RX Passband
CW Reverse
B
( )
LSB
RX Passband
F
EAK ILTER
FT
DX
[ A ] , [ B ] Button [ CW ] Button
Carrier
QRM
Carrier
QRM
( VFO-B )[ CONT/APF ] Button
( VFO-A )[ CONT/APF ] Button
( VFO-A )[ SELECT ] Knob
( VFO-B )[ SELECT ] Knob
5000 O M
PERATING ANUAL