[amsat-bb] uo-36 performance - Updated for another pass

["Alan K. Adamson" <ne1h@xxxxxxxxxxxxxxx>]

Continuing with the update progress.

Here are my numbers for the evening pass here in ATL tonight.
Pass date 06 Jul 2000, Start time 00:14:34, End time 00:26:42, Total
1832688, BPS 2517, %eff 91

Again, pretty amazing.  Strange thing was, the noon pass, I left the PC
running and tried to work it.  But it was pretty dismal, 351193 - Total, 29%
eff.  Might be the eclipse issue and pointing towards the sun, etc.  Stuff
Chris was talking about???

But, again, with the PCR-1000 and wispdde 3.0 doing the tuning, I cranked in
1.5khz of freq correction and had 97-100% nailed almost the entire time.
Only on the pass towards LOS, do I wish I had switchable antennas :-)..

Hope this helps everyone.

Alan

-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
Behalf Of Alan K. Adamson
Sent: Tuesday, July 04, 2000 10:36 PM
To: amsat-bb@AMSAT.Org
Subject: [amsat-bb] uo-36 performance


All,

I've been waiting for uo-36 to come back around and be functional, and I've
been waiting to get my tower, ants, etc up.  Well both happened tonight so I
thought I'd share my results.

I'm pretty happy, actually pretty impressed.

Eq on this end.

72' tower with
M2 (short) yagis in + config on an M2 cross boom
SSB preamps
170' of coax - don't ask!  I have trees ok!
847 for tx
Icom pcr-1000 for rx
TAPR 56002EVM/RI for modem

I've hacked together the .17 release of the g38kruh code with the new leonid
bios, etc.

Bottom line, on a 58 degree pass tonight I got all but the last min of the
pass and there are the numbers.

I copied from 1:27:39 to 1:39:58 (utc) total bytes of 1827245, 2472 BPS and
93% eff!!!!!  Awesome!!!  I'm stoked

I can't wait for a 60+ pass and I'm going to set up the flags to determine
if the modem is running out of horsepower.

I read that this setup worked only marginally and that the code didn't work
very well.  I'm not sure what that is in reference to?  Anyone enlighten me.
I do have a new evm that clocks just fine at 68khz.  The 50khz wide output
of the WFM (FM in widest mode, not WFM) on the pcr-1000 seems to work pretty
well to...

If anyone is interested in the code, I've put together a little zip file
with instructions, etc for setting it up on the evm.

Fun stuff!!!
Alan

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