[hpsdr] SDX Design, HORTON, CASMIR, and GIBRALTAR

[hughes3hns at aol.com]

If you aren't far from Germantown,MD then I would like to volunteer to 
do any soldering on the prototypes you might need....Since I do have 
one of those $$$ microscopes...at work and at home along with the 
requisite soldering irons....

Peter Hughes
N7BMG/3
Germantown/Hagerstown, MD

-----Original Message-----
From: Robert McGwier <rwmcgwier at comcast.net>
To: High Performance Software Defined Radio Discussion List 
<hpsdr at hpsdr.org>
Sent: Mon, 15 May 2006 12:05:51 -0400
Subject: Re: [hpsdr] SDX Design, HORTON, CASMIR, and GIBRALTAR

  ***** High Performance Software Defined Radio Discussion List *****

Alex:

Eaglepedia will be open soon.  The 70cm is in prototype stage and we
have a well known designer doing this KD6OZH who did the an earlier 
FPGA
SDR design using Xilinx parts.  It is my experience with that project
that lets me know we are going to have to have someone put on these
small pitch parts.  So far as I know of a couple of  people (including
me) succeeded in getting the thing together.  It pays to have a $500
microscope.  John will do the 23cm receiver next.

The phasing is for several different projects.  For our digital
transponder experiment (N8VB, AB2KT, KK7P, N2MJI, K7GNU, W2GPS, K3IO,
KD6OZH,   [SDR, GnuRadio, etc. users all], others participating), we 
are
attempting a phased array on C band.  I am just .  Expect to see lots 
of
HPSDR fall out in orbit ;-).

Bob



Alex wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Lyle,
> Looking some more at the P3E SDX block diagram. Are flight test L & U 
band
receivers are existing and are being exhibited at Dayton? Or is the 
hardware
still at prototyping stage? Is the design for the receivers available? 
It might
give HORTON design a boost.
>
> The reason behind my asing is this quote fromm the AMSAT-NA website 
...
> "A working Software Defined Transponder(SDX) on 2M and 70cm, like the 
one to
be used on our EAGLE satellite will be on display."
>
>
> What if GIBRALTAR placed a 10MHz signal onto ATLAS, and then MERCURY, 
HORTON,
and CASMIR could use it as a reference signal as a basis for whatever 
local osc
frequency was required. For Bob's phasing idea, there could be a 
separate LO bus
shared between multiple CASMIRs. I worry that we might be introducing 
too much
noise into the system if we try to ship a VHF/UHF LO onto ATLAS.
>
> Alex, N3NP
>
>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at hpsdr.org
> Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> HPSDR web page: http://hpsdr.org
> Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
>
>


--
AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,
NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman
Laziness is the number one inspiration for ingenuity.  Guilty as 
charged!

_______________________________________________
HPSDR Discussion List
To post msg: hpsdr at hpsdr.org
Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
HPSDR web page: http://hpsdr.org
Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/

   

 1147711294.0