Yaesu FTDX-9000MP, Руководство по эксплуатации

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Page 72 FT
DX
9000MP O
PERATION
M
ANUAL
B
C
A
IIIII
NTERFERENCE NTERFERENCE
NTERFERENCE NTERFERENCE
NTERFERENCE
R R R R R
EJECTION EJECTION
EJECTION EJECTION
EJECTION
(S(S(S(S(S
IGN IGN IGN IGN IGNALS ALS ALS ALS ALS WITHIN WITHIN WITHIN WITHIN WITHIN
3 3
3 3 3
KHZ KHZ KHZ KHZ KHZ
)))))
IF SHIFT O
PERATION
(
SSB/CW/RTTY/PKT/AM M
ODES
)
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.
M
AIN
B
AND
(VFO-A) IF S
HIFT
O
PERATION
Rotate the Main (VFO-A) band’s [ SHIFT
] control to the
left or right to reduce the interference.
S
UB
B
AND
(VFO-B) IF S
HIFT
O
PERATION
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.
A A
A A
A
D D D D DVICE VICE VICE VICE VICE
The position of the IF Shift system may be observed
on the LCD display.
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.
IF BANDWIDTH
Desired Signal Desired Signal
QRM
QRM
IF BANDWIDTH IF BANDWIDTH
SUB(VFO-B) [SHIFT] Knob
IF Shift system may be
observed on the LCD
VDD TEMP SWR BIAS
MAIN(VFO-A) [SHIFT] Knob
IF Shift system may be observed on the LCD