Yaesu FT DX 9000 CONTEST - 2, Руководство по эксплуатации

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Page 88 FT
DX
9000 C
ONTEST
O
PERATION
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 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
VFO-A.
Now be sure your mode selection is still set for the
VFO-A register, and press the CW mode key (#
)
once more. The “LSB” LED will blink for three sec-
onds, indicating that the “LSB” injection side has now
been selected.
When using Dual Receive, just press the B Mode
key (#
), then press the CW key to engage CW
Reverse on the VFO-B, in exactly the same was as for
the VFO-A.
Press the CW mode key (# ) once more to re-
turn to the normal (USB) injection side and cancel
CW Reverse operation.
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.
CW C
ONVENIENCE
F
EATURES
MODE 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.
RX Passband
RX Passband
Carrier
Carrier
QRM
QRM
Signal
Signal
Normal CW
( )
CW Reverse
( )
USB
LSB
B
A
Retune (Shift to Frequency) Lower
Retune (Shift to Frequency) Higher
Zero-In