Page 72 FTDX9000D OPERATION MANUAL
SUB(VFO-B)
DNR switch
MAIN(VFO-A)
DNR knob
MAIN(VFO-A)
DNR switch
SUB(VFO-B)
DNR knob
MAIN (VFO-A) SUB (VFO-B)
SUB(VFO-B)
RX switch
DIGITAL NOISE REDUCTION (DNR) OPERATION
The Digital Noise Reduction (DNR) system is designed to reduce the level of random nose found on the HF and 50 MHz
band, and it is especially effective during SSB operation. By rotating the DNR knob, any of sixteen different noise-
reduction algorithms can be selected; each of these algorithms was create for dealing with a different noise profile, and you
will want to experiment with the DNR system to find the best setting according to the noise currently being experienced.
Main (VFO-A) Band DNR Operation
1. Press the Main (VFO-A) band’s DNR switch (# ).
The LED imbedded in the switch will glow Red, con-
firming that the DNR system is engaged.
2. Rotate the Main (VFO-A) band’s DNR knob (# )
to select the setting that most effectively reduces the
noise level.
To disable the DNR system, press the Main (VFO-A) band's
DNR switch once more. The imbedded LED will turn
off, confirming that the DNR system is not active.
Sub (VFO-B) Band DNR Operation
1. Press the Sub (VFO-B) band’s RX switch to engage
Dual Receive operation.
2. Press the Sub (VFO-B) band’s DNR switch (# ).
The LED imbedded in the switch will glow Orange,
confirming that the DNR system is engaged.
3. Rotate the Sub (VFO-B) band’s DNR knob (# ) to
select the setting that most effectively reduces the noise
level.
To disable the DNR system, press the Sub (VFO-B) band's
DNR switch once more. The imbedded LED will turn
off, confirming that the DNR system is not active.
Interference Rejection (Signals within 3 kHz)
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