Re: [Elecraft] NR Revisited (trying again in plain text mode)

2009-12-30 Thread Wayne Burdick
We're going to make NR per-mode in the next firmware release, too. This should eliminate the need to hunt for the ideal setting each time you change modes. 73, Wayne N6KR On Dec 29, 2009, at 5:17 PM, Chuck Guenther wrote: I've been pleasantly surprised at how well NR works even with very

Re: [Elecraft] NR Revisited (trying again in plain text mode)

2009-12-30 Thread Hector Padron
wrote: From: Wayne Burdick n...@elecraft.com Subject: Re: [Elecraft] NR Revisited (trying again in plain text mode) To: Chuck Guenther charles9...@att.net Cc: elecraft@mailman.qth.net Date: Wednesday, December 30, 2009, 5:54 PM We're going to make NR per-mode in the next firmware release, too

Re: [Elecraft] NR Revisited (trying again in plain text mode)

2009-12-30 Thread Philippe Trottet
Dear Wayne, Its great ! Many thanks for your efforts. Bst 73's Philippe A65BI K3#3616 Wayne Burdick n...@elecraft.com 30-12-2009 21:54 We're going to make NR per-mode in the next firmware release, too. This should eliminate the need to hunt for the ideal setting each time you change modes.

[Elecraft] NR Revisited (trying again in plain text mode)

2009-12-29 Thread John Lawrence
Over the past two months I've been enjoying weak signal low band DXing on good antennas with my K3 using roofing filters for CW (500Hz) and SSB (2.1 KHz) . My K3 has the latest DSP board and the firmware is up to date with the thirty-two(?) NR choices. What I'm finding is that the NR Firmware

Re: [Elecraft] NR Revisited (trying again in plain text mode)

2009-12-29 Thread Guy Olinger K2AV
The DSP is behind the roofing filters. I set my 400 Hz filter to cut in at 450 Hz width. If I set width to 500, the K3 uses the 1.8 kHz roofing filter. The information diversity of the noise vs CW signal as a ratio is much larger there and the algorithm seems to take advantage of that. To my

Re: [Elecraft] NR Revisited (trying again in plain text mode)

2009-12-29 Thread Joe Planisky
Hi John, Exactly so. Lyle Johnson explained how NR works in the K3 a while ago and he said exactly what you've observed: NR works best with wider bandwidths. You can see his explanation at http://www.zerobeat.net/mediawiki/index.php/K3_DSP 73 -- Joe KB8AP On Dec 29, 2009, at 9:53 AM,

[Elecraft] NR Revisited (trying again in plain text mode)

2009-12-29 Thread Chuck Guenther
I've been pleasantly surprised at how well NR works even with very narrow CW bandwidths. I routinely use a 250 Hz roofing filter followed by 250, 200, or 150 Hz DSP filters for Top Band. The NR set around F1-2 or F1-3 quite often makes a difference for me. It wasn't always this way. Thanks to