Yaesu FT DX 1200 Operation Manual

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Page 57FT DX 1200 O PERATING M ANUALD IGITAL NOTCH FILTER (DNF) OPERATIONThe 'igital 12TCH Filter '1F) is an effective beat-canceling ¿lter that can null out a number of interfering beat notesinside the receiver passband. Because this is an $uto-1otch feature, there is no adjustment knob associated with this ¿l-ter.A DVICE :If a very strong interfering carrier is encountered, we recommend you ¿rst use the IF 12TCH ¿lter, as it is the most ef-fective notching tool in the receiver section.1. 3ress the [S/T/W/X] button to select the “DNF”.. 3ress the [SELECT] button to choose “ON”. The“DNF” will appear in the display.To disable the 'igital 12TCH Filter, just repeat theabove procedure, pressing the [SELECT] button tochoose “OFF” in step above. The “DNF” will turn off,con¿rming that the 'igital 12TCH Filter is not active.D IGITAL NOISE REDUCTION (DNR) OPERATIONThe 'igital 1oise 5eduction '15) system is designed to reduce the level of random noise found on the HF and 00H] bands, and it is especially effective during SSB operation. By setting the 0enu item “110 DNR LEVEL”, any of 1different noise-reduction algorithms can be selected each of these algorithms was created for dealing with a differentnoise pro¿le. You will want to experiment with the '15 system to ¿nd the best setting corresponding to the noise cur-rently being experienced.1. 3ress the [S/T/W/X] button to select the “DNR”.. 3ress the [SELECT] button to choose “ON”. The“DNR” will appear in the display.To disable the '15 system, just repeat the above proce-dure, pressing the [SELECT] button to choose “OFF” instep above. The “DNR” will turn off, con¿rming thatthe '15 system is not active.[SELECT] button[SELECT] buttonI NTERFERENCE R EJECTIONDNF IndicatorDNR Indicator[S/T/W/X] button[S/T/W/X] button