Using Cw Reverse - Yaesu FTDX-9000D Operation Manual

CW C
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 throw the interfering station's frequency in a direc-
tion that may lend itself more readily to rejection.
To start, let's use a typical example where you have set the
CW mode (using the default "USB" injection) onto the
Main (VFO-A) receiver.
H Now be sure your mode selection is still set for the
Main (VFO-A) register, and press the CW mode
key (# ) once more. The "LSB" LED will blink for
three seconds, indicating that the "LSB" injection side
has now been selected.
H When using Dual Receive, just press the B Mode
key (# ), then press the CW key to engage CW
Reverse on the Sub (VFO-B) receiver, in exactly the
same was as for the Main receiver.
Press the CW mode key once more to return to the nor-
mal (USB) injection side and cancel CW Reverse opera-
tion.
In the illustration, Figure A demonstrates the normal
CW injection setup, using the USB side. In Figure
B, CW Reverse has been engaged, so as to receive
using LSB-side injection to eliminate interference.
The beneficial effect of switching sidebands can
clearly be seen in this example.
A
Carrier
Normal CW
( )
USB
RX Passband
B
CW Reverse
( )
LSB
RX Passband
Page 104
F
U CW R
Signal
QRM
Carrier
Signal
QRM
CW switch
Note
When CW Reverse is engaged, the Tuning Meter action
will concurrently be reversed as to its indication.
When the incoming signal pitch tone is properly aligned,
the central LED lights up whether or not CW Reverse is
engaged.
Retune (Shift to Lower Frequency)
Zero-In
Retune (Shift to Higher Frequency)
FT 9000D O M