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4hv.org :: Forums :: General Chatting
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RF/HV booty :)

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Conundrum
Wed Nov 04 2009, 09:42PM Print
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi all.

I just rescued this lot from being dumped. Is any of it any use?

mainly RF 2G modules, power supplies, FPGA backplanes, etc


1257370954 96 FT0 Pb041878

1257370954 96 FT0 Pb041880

1257370954 96 FT0 Pb041882

1257370954 96 FT0 Pb041883

1257370954 96 FT0 Pb041884
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Dalus
Wed Nov 04 2009, 10:15PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
Lots of fast hardware smile
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Hazmatt_(The Underdog)
Thu Nov 05 2009, 04:57AM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
And even if it doesn't work, you have hundreds of dollars in SMT components!

The high power SMT stuff is really expensive!
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Steve Conner
Thu Nov 05 2009, 12:06PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
What is it Conundrum, a cell phone base station?
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GeordieBoy
Thu Nov 05 2009, 12:44PM
GeordieBoy Registered Member #1232 Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
I think it is. I suspect those gold things in the first picture are Tx/Rx Microwave diplexers for the antennas.

Not sure if the RF power amplifiers are there, although the black things in the last picture seem to have VSWR warning lights on them.

I guess all the Sharcs are for the baseband processing.

-Richie,
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Dalus
Thu Nov 05 2009, 02:09PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
too bad sharc + JTAG = expensive :(
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Steve Conner
Thu Nov 05 2009, 04:13PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Yes, to develop on your own SHARC board (as opposed to an ADI eval board) you need the full version of VisualDSP, which won't leave you much change out of $10k. Those are TigerSharcs, so they probably charge even more.

We have the full development environment and JTAG box for TI's C67xx 32-bit floating point DSPs. It cost a couple of grand too. frown

I think I spotted one of Xilinx's high-end Virtex FPGAs on there too (the big silver chip) so this board obviously isn't short of power.
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Dave47
Thu Nov 05 2009, 05:37PM
Dave47 Registered Member #84 Joined: Thu Feb 09 2006, 01:06PM
Location: Dallas, TX
Posts: 47
The Vectron oscillator is probably pretty cool, too. I can't see the part number, but it looks like one of the super low phase noise types.

David
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Dr. Slack
Thu Nov 05 2009, 07:05PM
Dr. Slack Registered Member #72 Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
It depends what you mean by low phase noise for the Vectron oscillator.

It's an OCXO (oven controlled XO), so it's likely to be the timing reference for the base-station. This will be super high stability, it's got to maintain +/- a gnat's if the external reference goes down, look up Stratum III for a typical holdover specification. However, it will not necessarily be supa dupa (just fairly good) at 20kHz or 10MHz offsets which would be needed for a quiet signal generator reference.

Anyhow, not to be sneezed at.
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Conundrum
Fri Nov 06 2009, 12:06AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
cool. anyone interested in the boards?

i took one of the receivers apart, 140 screws later and i have some MMICs, random logic etc and what appear to be microwave mixer diodes.

have three more of these fpga boards and another TCXO board.
-A
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