I had forgotten about that fact. In what I wrote, the assumption was that an IF was being fed back to the rest of the receiver, and that it was at a lower frequency than the rf, and hence the claimed lower cable loss.
But fiber is better if the entire down-conversion and detection is done at the antenna, and basically detected video is being fed back. In fact, that eliminates a lot of expense in low-loss coax. That alone could be worth several thousand $$ or pounds or whatever... Ken Javor Phone: (256) 650-5261 > From: John Woodgate <j...@jmwa.demon.co.uk> > Date: Wed, 31 Aug 2011 19:22:36 +0100 > To: <EMC-PSTC@LISTSERV.IEEE.ORG> > Subject: Re: EMI Receiver - Recommendations? > > In message <ca83e27d.bf05f%ken.ja...@emccompliance.com>, dated Wed, 31 > Aug 2011, Ken Javor <ken.ja...@emccompliance.com> writes: > >> Then the rest of the connection all the way back to the receiver should >> be well-matched 50 Ohm sections. >> > I believe the product in question has a fibre-optic link. I wonder what > the impedance of that is. (Half serious.) > -- > OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk > John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK > When I point to a star, please look at the star, not my finger. The star will > be more interesting. > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://product-compliance.oc.ieee.org/ > Graphics (in well-used formats), large files, etc. can be posted to that URL. > > Website: http://www.ieee-pses.org/ > Instructions: http://listserv.ieee.org/request/user-guide.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <emcp...@radiusnorth.net> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
