If Shift Operation (Ssb/Cw/Rtty/Pkt/Am Modes) - Yaesu FTDX9000D - DATA MANAGEMENT Operation Manual

I R
EJECTION ( S
NTERFERENCE
IF SHIFT O
IF Shift allows you to vary the DSP filter passband higher or lower, without changing the pitch of the incoming signal, so
as to reduce or eliminate interference. Because the carrier tuning frequency is not varied, there is no need to re-tune the
operating frequency when eliminating the interference. The total passband tuning range for the IF Shift system is ± 1 kHz.
SUB (VFO-B) [ SHIFT ] knob
Main (VFO-A) Band IF Shift Operation
Rotate the Main (VFO-A) band's [ SHIFT ] control to the
left or right to reduce the interference.
A A A A A
D D D D D VICE VICE VICE VICE VICE
The position of the IF Shift system may be ob-
served on the TFT.
Referring to Figure (A), note the depic-
tion of the IF DSP filter as the thick line,
with the [ SHIFT ] control in the 12 o'clock
position. In Figure (B), an interfering sig-
nal has appeared inside the original pass-
band. In Figure (C), you can see the effect
of rotating the [ SHIFT ] control so as to
reduce the interference level by moving
the filter passband so that the interference
is outside of the passband.
Page 72
IGNALS WITHIN
( SSB/CW/RTTY/PKT/AM M
PERATION
MAIN (VFO-A)
IF Shift system may be
observed on the TFT
A
IF BANDWIDTH
)
3
KHZ
SUB (VFO-B)
IF Shift system may be
observed on the TFT
MAIN (VFO-A) [ SHIFT ] knob
Sub (VFO-B) Band IF Shift Operation
1. Press the Sub (VFO-B) band's [ RX ] switch to engage
Dual Receive operation.
2. Rotate the Sub (VFO-B) band's [ SHIFT ] control to
the left or right to reduce the interference.
Desired Signal B Desired Signal
QRM
IF BANDWIDTH
FT 9000D O
DX
)
ODES
SUB (VFO-B) [ RX ] switch
C
QRM
IF BANDWIDTH
M
PERATION ANUAL