[amsat-bb] Re: 38k4 packet operations on AO-51 Nov 14-18, 2010

[Angelo Glorioso]

Hi Mark,
 
 Do we know what the BBS power output will be increased too???  With my busy schedule I will be unable to upload pictures before hand.  Hopefully there
are some on the bbs before Sunday to download at 38.4k.
 
 
Angelo Glorioso III
  

 
 
 
--------------------------------------------------------- 
If you don't ask, you will never know!!



 
> Date: Fri, 12 Nov 2010 09:29:51 -0500
> From: marklhammond at gmail.com
> To: amsat-bb at amsat.org
> CC: oz6bl at amsat.dk
> Subject: [amsat-bb] 38k4 packet operations on AO-51 Nov 14-18, 2010
> 
> Hello All,
> 
> Just a reminder that we'll be running a few days of 38k4 packet
> beginning Sunday afternoon/evening until Thursday afternoon/evening,
> as per the schedule below. Note the voice repeater will be OFF.
> 
> Please keep in mind that receiving packet at 38k4 requires more than
> your "stock" FM receiver and TNC. Generally speaking, folks are using
> a Symek board installed in their satellite radio to tap the IF which
> is then fed to a high speed TNC. Other options for a receiver include
> a PCR-1000/1500/2500 in FM mode with filters set to 50 kHz (NOT
> Wide-FM) (I think that's the right filter width).
> 
> Please remember Douglas Quagliana's KA2UPW soundcard decoder (as
> presented in the AMSAT Journal a few issues back) that can be
> downloaded here: http://www.quagliana.com/ Look for Willow and
> Sabins. I suggest you get the software and test it out at 9600
> before you attempt 38,400, so to become familiar with how it works
> with your receiver. It does work at 38k4--but remember you must have
> an appropriate receiver!
> 
> It is possible to use some of the SDR stuff I'm sure, if you record
> with your SDR software and play back through KA2UPW's Willow program.
> 
> I have a few options in my shack, as I've been running 38k4 since the
> good old UoSat days:
> 
> Receivers capable of 38k4 (up to 76k, actually):
> TS-2000x with Symek IF board
> TS-790A with Symek IF board
> Icom PCR-1500
> 
> For decoding:
> Paccomm Spirit/Sprint-2 Satellite TNC models with 38k4 filters installed
> Willow
> 
> My preferred combination is the TS-2000x with Symek IF board feeding a
> Pacomm Sprint-2 satellite model. I seem to get the best performance
> out of this combo.
> 
> Here's a reminder of the schedule:
> 
> November 14 (late UTC)
> 38k4 Baud PBBS Operations, L/U
> Uplink: 1268.705 MHz FM at 9600 baud
> Downlink: 435.150 MHz FM at 38,400 baud
> 
> November 18 (late UTC)
> FM Repeater, L/SU
> Uplink: 1268.705 MHz FM (no PL tone)
> Downlinks: 2401.200 MHz FM *and* 435.300 MHz FM (at low power!)
> 
> 73!
> -- 
> Mark L. Hammond [N8MH]
> _______________________________________________
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