Digital Noise Reduction (Dnr) Operation - Yaesu FTDX9000D - DATA MANAGEMENT Operation Manual

D
IGITAL
The Digital Noise Reduction (DNR) system is designed to reduce the level of random noise found on the HF and 50 MHz
bands, 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) [ DNR ] knob
SUB (VFO-B) [ DNR ] knob
Main (VFO-A) Band DNR Operation
1. Press the Main band's (VFO-A) [ DNR ] switch. The
LED imbedded in the switch will glow Red, confirm-
ing that the DNR system is engaged.
2. Rotate the Main band's (VFO-A) [ DNR ] knob to se-
lect the setting that most effectively reduces the noise
level.
To disable the DNR system, press the Main band's (VFO-
A) [ DNR ] switch once more. The imbedded LED will turn
off, confirming that the DNR system is not active.
The Sub band (VFO-B) frequency display will show the current noise reduction parameter for 3 seconds whenever
the [ DNR ] knob is turned.
You may disable this feature (displaying the current noise reduction parameter) via Menu item "DISPLAY 022
LEVEL INDICATOR." See page 144 for details.
FT 9000D O
DX PERATION
I
NTERFERENCE
N R
OISE EDUCTION
MAIN (VFO-A) [ DNR ] switch
SUB (VFO-B) [ DNR ] switch
A A A A A
D D D D D VICE VICE VICE VICE
VICE
M
ANUAL
R
EJECTION ( S
( DNR ) O
PERATION
SUB (VFO-B) [ RX ] switch
Sub (VFO-B) Band DNR Operation
1. Press the Sub band's (VFO-B) [ RX ] switch to en-
gage Dual Receive operation.
2. Press the Sub band's (VFO-B) [ DNR ] switch. The
LED imbedded in the switch will glow Orange, con-
firming that the DNR system is engaged.
3. Rotate the Sub band's (VFO-B) [ DNR ] knob to se-
lect the setting that most effectively reduces the noise
level.
To disable the DNR system, press the Sub band's (VFO-
B) [ DNR ] switch once more. The imbedded LED will
turn off, confirming that the DNR system is not active.
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IGNALS WITHIN KHZ
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