The vertical axis is time, about 30 seconds per division. You see
approximately two complete playbacks of the 1 minute mp3.
73 Martin AA6E
Ron Castro wrote:
The EQ settings were flat on both radios. Actually, there is no receive EQ
setting in the TS-870, and the receive EQ on the O2 V.2.037j does not work
on AM. Each receiver was fed to a Behringer UB1202 mixer (settings flat)
feeding a Sound Blaster Audigy 2 card in my laptop, also flat.
On your graph Martin, is the vertical axis time? If so, how much time is
being displayed? I'm not quite sure how to read that.
Ron N6IE
www.N6IE.com
(Formerly N6AHA)
----- Original Message -----
From: "Martin AA6E" <aa6e@ewing.homedns.org>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, January 23, 2007 5:53 PM
Subject: Re: [TenTec] AM Receiver distortion in Orion II
The second half is clear far better than the first, in my opinion. It's
not a question of low-frequency response, but of distortion in the highs
- almost like a little clipping, or maybe some other digital artifact.
Ron should tell us what the Audio Eq. setting was, by the way.
I ran a spectrum on the file with Spectrum Lab. The results (for
several playbacks) are at http://aa6e.net/aa6e/images/capt0701232044.jpg
. Carl was right that the "good" playback is much wider than Orion's.
Orion's spectrum has a very sharp cutoff, but I don't think that's what
I am hearing.
It would be neat to try this on the Orion I comparing v1 and v2
firmware, but I've got a few other things to do right now...
73 Martin AA6E
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