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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