FTDX1200 Operating Manual Page 57

INTERFERENCE REJECTION Cont'd
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DIGITAL NOTCH FILTER (DNF) OPERATION
The Digital NOTCH Filter (DNF) is an effective beat-canceling filer that can null out a number of interfereing beat notes inside the receiver passband. Because this is an Auto-Notch feature, there is no adjustment knob associated with this filter.

ADVICE:
If a very strong intertering carrier is encountered, we recommend you first us the IF NOTCH filter, as it is the most effective notching tool in the receiver section.

  1. Press the [◄/►/▲/▼] button to select the [DNF].
  2. Press the [SELECT] button to choose "ON". The "DNF" will appear in the display.

To disable the Digital NOTCH Filter, just repeat the above procedure, pressing the [SELECT] button to choose "OFF" in Step 2 above. The "DNF" will turn off, confirming that the Digital NOTCH Filter is not active.



End of "Digital Notch Filter (DNF) Operation"

DIGITAL NOISE REDUCTION (DNR) OPERATION
The Digital Noise Reduction (DNR) system is designed to reduce the level of noise found on the HF and 50 MHz bands, and it is especially effective during SSB operation. By setting the Menu item "110 DNR LEVEL", any of 15 different noise-reduction algarithms can be selected; eash of these algorithms was created for dealing with a different noise profile. You will want to experiment with the DNR system to find the best setting corresponding to the noise currently being experienced.

  1. Press the [◄/►/▲/▼] button to select the [DNR].
  2. Press the [SELECT] button to choose "ON". The "DNR" will appear in the display.

To disable the DNR system, just repeat the above procedure, pressing the [SELECT] button to choose "OFF" in Step 2 above. The "DNR" will turn off, confirming that the DNR system is not active.





End of "Digital Noise Reduction (DNR) Operation"

End of "Interference Rejection"
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FTDX1200 Operating Manual Page 57