Re: LF: LF EbNaut test from JN80 on 137370

[Andy Talbot <andy.g4jnt@gmail.com>]

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 <dl4yhf@freenet.de> 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
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