Hi there Terry. Thank you very much for jumping in on this topic. So far I am with you in every way. I have been given several different opinions on values to use and will try them out soon. ref the external DSP unit, I was kind of hoping that the Flex would be able to perform any kind of DSP needed to accomplish the required NR. But, in all fairness, even my ole FT-1000 MP NR really stinks. I have yet to find one time where I thought it made the signal easier to copy, IMO. TU agn es 73.
Oh, CU on 2m SSB hi-hi Gedas, W8BYA Gallery at http://gedas.cc Light travels faster than sound... This is why some people appear bright until you hear them speak. ----- Original Message ----- From: Terry Maurice To: W8BYA Cc: flexradio@flex-radio.biz Sent: Sunday, April 21, 2013 10:27 AM Subject: Re: [Flexradio] NR Settings Hi Gedas I have tried just about every combination of the NR parameters and have only succeeded in creating a more distorted and basically unlistenable sound. Reducing AGC-T is much more effective in reducing noise, but you also lose some sensitivity. With all the other sophisticated capabilities of the PowerSDR software, the NR is surely one of the more disappointing features. With the signal in the digital domain the software should be capable of much better noise reduction than is presently available. I have had much better luck with post rig processing, using a BHI Neim1031 Mark II processor. These units are made in the UK. http://www.bhi-ltd.com/index.php/products/noise-cancellation-products/noise-cancelling-in-line-modules/neim1031-mkii.html?view=item&layout=item This unit connects to the audio output of the Flex and is very successful in reducing background noise. It has 8 stepwise levels of noise reduction and a built in amplifier that is very effective. This same unit is available in the US through GAP Antennas and known as "Hear It" http://www.gapantenna.com/hearit_inline.htm This is the same unit as the BHI but with the controls oriented horizontally rather than vertically. It is a very effective unit especially for weak signal work. Terry On 20/04/2013 10:43, W8BYA wrote: I was playing around with the NR function on my 5000A (V2.5.3) for the first time trying different settings of Taps, Gain, Delay, & Leak. I was not having much luck blindly running numbers up and down. I was wondering if anyone had a source of information that they could point to that talked about what those various parameters were and how they might affect the overall NR function etc? Or possibly if someone has found a set of numbers that worked well for them in certain noisy instances that would be interesting to discuss....TU es 73 Gedas, W8BYA Gallery at http://gedas.cc Light travels faster than sound... This is why some people appear bright until you hear them speak. _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ -- VE3XTM EN93un "May the propagation be with you." _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
