[Mep-dev] MEP

[Bennett, Bill]

Hi Paul and Michelle
What is this box? Balun

As far as the diagram why the balanced design, in the old days they would have used single ended using off the shelf coaxial devices. IE: mixers mixers, splitters, 90 degree splitters or 90 degree of coax. This is how the modems were made for NASA's Pioneer space program at BPSK, I think the old OM73 QPSK modem also used descrete mixers.
Also I would prefer some non balanced input A/D like the old TMC1175 http://www.cadeka.com/uploaded_files/TMC1175.pdf 40 Msps device. Driving the FPGA.  I have found that keeping the digital noise away from the A/D makes bread boarding a little easier.
Seems to me the IF section could be ordered from Mini circuits and hooked up with coax.

What are you using for a modulator? D/A's driven by a prom



Bill Bennett
Systems Integration & Test Engineer
Curtiss-Wright Controls Embedded Computing
10201 Wateridge Circle, San Diego, CA 92121
Email:  bill.bennett at curtisswright.com<mailto:bill.bennett at curtisswright.com>
office: (858) 452-0020


_______________________________________________________________________
This e-mail and any files transmitted with it are proprietary and intended solely for the use of the individual or entity to whom they are addressed. If you have reason to believe that you have received this e-mail in error, please notify the sender and destroy this email and any attached files. Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of the Curtiss-Wright Corporation or any of its subsidiaries.  Documents attached hereto may contain technology subject to government export regulations. Recipient is solely responsible for ensuring that any re-export, transfer or disclosure of this information is in accordance with applicable government export regulations.  The recipient should check this e-mail and any attachments for the presence of viruses. Curtiss-Wright Corporation and its subsidiaries accept no liability for any damage caused by any virus transmitted by this e-mail.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://uppermeadow.com/pipermail/mep-dev/attachments/20100604/81c8c2ef/attachment.html