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RE: G3RUH Hardware Demod Mk II vs AO40RCV test



http://www.qsl.net/ae4jy/ao40rcv.htm

-----Original Message-----
From: David Kent [mailto:dak@ioa.com]
Sent: Monday, January 22, 2001 10:58 AM
To: paul.willmott@omsl.bm
Subject: Re: [amsat-bb] G3RUH Hardware Demod Mk II vs AO40RCV test


Paul,

sorry for the intrusion, but I'd be curious to know if the software
demodulator referred to as AO40RCV is the "French demodulator" or another
one ? If another where can it be obtained ?

Regards,

David Kent / k4uja
dak@ioa.com


----- Original Message -----
From: <paul.willmott@omsl.bm>
To: <amsat-bb@AMSAT.Org>
Sent: January 22, 2001 8:40 AM
Subject: [amsat-bb] G3RUH Hardware Demod Mk II vs AO40RCV test


> Hi All,
>
> This morning I ran both the AO40RCV software demodulator and my G3RUH
> Hardware demodulator at the same time from the same audio source, .... the
> hardware won by only 3 CRCC OK blocks!
>
> Total scores:
> AO40RCV: 45 CRCC OK out of 115 received
> G3RUH: 48 CRCC OK out of 121 received
>
> The usual post-perigee pass is good at start, then 2 MAs of spin mod, the
> good again
>
> Both were neck and neck until the 2MAs pf spin mod, ... when the good
> signals started again the G3RUH was back with CRCC OK, but AO40RCV didn't
> get any, ... then I went to work so didn't get the end of the pass, ... so
> this is not a totally conclusive test, ... I would expect DSP to work best
> under noise conditions, ... like MA20 onwards! That test to come.
>
> I was unable to listen passed MA13 because I had to go to work, ... but
> shows there is very little difference between top end hardware and Moe's
> AO40RCV software solution.
>
> I will continue to test both side by side for a while to see if either one
> can be optimized either by audio level, audio tone, method of staying on
> frequency etc.
>
> If your software decoder doesn't write log files in the AMSAT Archive
> format, then try out Moe's program as it is 100% compatible with archive,
> and works great! You can find the download link on the telemetry page on
> www.amsat.org
>
> Cheers
> Paul, VP9MU
>
>
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