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TX filter settings for RTTY
W5AP
Member
All posts for this thread are 6 years old. So was wondering what others set the TX filter settings for RTTY that are tight and work?
0
Answers
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400hz typically down to 250hz in a crowded contest band. Rock solid filter skirts on all of the 6K series radios. Using N1MM+ and MMTTY decodes quite well. de Clay N9IO0
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For transmit I have set the TX bandwidth same as SSB. This seems reasonable because the RTTY tones are generated digitally and will have no noise or other artifacts that need filtering, round off error notwithstanding.
Instead of using the old school tone pairs at 2250 cycles (from the 88mH torroid days) I use 1000 cycles to ease the math with spots etc.
Comments?
k3Tim // Tim0 -
If you happened to watch W0YK at contest U, he recommends a 500hz filter for the best RTTY decode. I usually use 400hz (I have won several rtty contests) Filters set at the tightest setting can result in additional latency.. so experiment with that and find your tolerance vs rejection level0
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So by pushing the TX button (mic/cw speed,etc) In the filter skirts, you'd set 1000 plus or minus say 750 (the shift is 700 in afsk)
Tnx, Jim0 -
Tnx Chris
I did watch his Ed's excellent presentation. But I'm not interested in the RX filter settings, but what to set the filters (using a 1275 Mark ) by pushing the TX (mic/cw) button which brings up the TX window on the 6600M
I wasn't clear on that I guess
Jim0
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