Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: LF EbNaut test from JN80 on 137370

To: [email protected]
Subject: Re: LF: LF EbNaut test from JN80 on 137370
From: Andy Talbot <[email protected]>
Date: Thu, 10 Dec 2015 17:57:28 +0000
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=cNukznEnnXt41JPjKZLIJWOE0aRG4+6NA5xCCXz0Yjk=; b=LSijnb9aBBSvcuGLubGCeueIkRZUSu6Tmvwq2fRTRbJfsEkG+KgXlMgytSyzg6+eOv O8/ioj1iMhil1ryzMmQZWJw0DeeCbtVkDjr17suFKzRZUtmb+ZX3BdEc22gw0kjE/PtQ DwG5MHdG4H66NJytPcunwqRZ1Swti24V463+n62PgYqB8oxwmfbWgvs6s+7G+loGAk11 PfpAS7k86NwFX8CucNsg51K7QcVFzuaUe1aSYQIiKcmAQcsFf2nFIuyBzzv+XmD/pLOI gpoi5XV78DbserKKFYHlgH/JLhb5lR0n6zBdyx+HMSW2oTKvdD34p2raGgfPAvhbrJh/ 6uMw==
In-reply-to: <[email protected]>
References: <[email protected]> <CAA8k23RQGU=hgYNB0fQOh-HnU9B-ZCW6_Oki0RcWKBHDxksV7w@mail.gmail.com> <[email protected]> <CAA8k23TqCUokxj9GoN0oPq9rbJWsS2w+-e8e0gCTReNNwzBmGg@mail.gmail.com> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
The frequency in that file goes from negative to zero to positive.  So I would have thought it would show leading moving to lagging , or vice versa

But yes, there seems to be no standard for I/Q wave files

'jnt



On 10 December 2015 at 17:35, Wolfgang Büscher <[email protected]> wrote:
Hmm... the old problem with "I leading Q" or "Q leading I" if the signal frequency in the complex stream is positive.

When loading Andy's file in a curve editor, I see the 2nd channel leads the 1st by 90 degrees.
"positive or negative frequency" per definition ?

Cheers,
  Wolf .

Am 10.12.2015 um 13:00 schrieb Paul Nicholson:

Andy wrote:

> I'll check my generated .WAV files via the waterfall plot
> in Spec Lab to make sure the I/Q is the right way
> round.

Yes, here I will check vlfrx-tools, I think it's the right
polarity but maybe not?   I notice when I rx I/Q from an
RTL2832 SDR I have to invert Q to get the sidebands the
right way round which is suspicious.

--
Paul Nicholson
--




<Prev in Thread] Current Thread [Next in Thread>