FCDevelopment at Yahoo! Groups

Re: Gain spectrum measurements

eagle@... — Mon, 15 Apr 2013 10:54:33 GMT

... I wish... Howard

Re: [Fcdproplus] Gain spectrum measurements

Jim Lesurf — Mon, 15 Apr 2013 08:56:24 GMT

As usual, I got no email back from the FCDevelopment, but have now read it using a web browser. Maybe I should unsubscribe, wait a few days, and subscribe

Re: Gain spectrum measurements

willis.mj@... — Sun, 14 Apr 2013 15:56:48 GMT

Very versatile, we need an FCD TX. Howard? How did you do the 50-75 ohm transformation? Maybe that explains the filter ripple, though possibly not the

Gain spectrum measurements

Jim Lesurf — Sun, 14 Apr 2013 15:43:01 GMT

I'm copying this to the development group as it may of interest to both lists, but I'll probably not get an email back from the development list! ... Sending

Re: [Fcdproplus] dev group mail

Jim Lesurf — Mon, 25 Feb 2013 09:44:29 GMT

In article , Alan Melia ... Weird, but not un-typical of my past experience with yahoogroups. ... I'd guess that yahoo

dev group mail

Alan Melia — Mon, 25 Feb 2013 01:14:50 GMT

Hi Jim You are not getting mail because according to the logs you applied for membership and have been accepted but you you do not appear in the members list

IQ imbalance

Jim Lesurf — Sun, 24 Feb 2013 13:37:08 GMT

Afraid I'm still not getting postings via email from the FCDev group. So I only noticed Robin's email (#833) this morning. Yes, I understand the reasons for

Re: Comments on IQ imbalance

Robin Gape (FCD) — Fri, 22 Feb 2013 18:54:38 GMT

Jim, what you're seeing is the result of real-world imperfections, most probably in the SDR ASIC. For digital radio applications where strong signals may be

Re: Comments on IQ imbalance

Simon G4ELI/HB9DRV — Fri, 22 Feb 2013 16:02:18 GMT

Jim, Alex who writes SDR Rocky http://www.dxatlas.com/Rocky/ has made his algorithm available for free use. See http://www.dxatlas.com/Dev/ the file you want

Comments on IQ imbalance

Jim Lesurf — Fri, 22 Feb 2013 15:44:37 GMT

Having now put up the calibration measurements I've spent some time working on a Scope/FFT display and analyser to go with FUN_Scanner. Experiments popped up

Re: [Fcdproplus] Calibration results on FUNCube pro plus

Jim Lesurf — Fri, 22 Feb 2013 14:24:18 GMT

... Now done. (I've also corrected a typo on the page.) So there is now a zip of the raw measured data linked from

Re: [Fcdproplus] Calibration results on FUNCube pro plus

Jim Lesurf — Fri, 22 Feb 2013 09:42:17 GMT

Not sure yet, but it looks like this may have come back from the FDev list.. In article <7810C586F3254E3A8EBC00AC9BAE5332@Alta>, David J Taylor ... Yes. An

Re: [Fcdproplus] Calibration results on FUNCube pro plus

David J Taylor — Fri, 22 Feb 2013 07:58:56 GMT

From: Jim Lesurf ... Yes. As yet I've not measured the noise floor. Although I should now be able to do so given the calibration. The measurement will be easy

Re: [Fcdproplus] Calibration results on FUNCube pro plus

Jim Lesurf — Thu, 21 Feb 2013 14:47:57 GMT

In article <5321810512jcgl@...>, Jim Lesurf ... Occurs to me to add: If you or others would like a copy I can put a csv file up on the web showing

Re: [Fcdproplus] Calibration results on FUNCube pro plus

Jim Lesurf — Thu, 21 Feb 2013 14:33:53 GMT

In article , David J Taylor ... [snip] ... Yes. As yet I've not measured the noise floor. Although I should now be able