>-----Original Message----- >From: djumbdenst...@tycoint.com [mailto:djumbdenst...@tycoint.com] >Sent: Monday, April 21, 2003 10:28 AM >To: emc-p...@majordomo.ieee.org >Subject: Low signal switching > > > >Hello Friends, > >I have an application in which I would like to switch system >signals on coax >cables. One system is 80 to 1000 MHz, the other is 1-2 GHz. I >have found >coax switches by Narda, DB Products and Dow Key. Dow Key >indicates that the >signals should be above -20 dBm to ensure that contact >resistance doesn't >cause a problem. The others do not spec or address low signal >issues. My >branches operate at -35 dBm, 0 dBm and 50 dBm. The 2 higher >values are not >a problem, just the -35 dBm. Are there other companies that >you are aware >of that make 50 ohm coax switches that are specified to operate at low >signal levels? Other ideas? > >Best regards, > >Don Umbdenstock >Sensormatic
Don: The only ones I trust are the HP (now Agilent) coax relays. As for low-level reliability, this is what is used in my HP automated data acquisition system, and I have also seen them used in Watkins Johnson receivers. Both applications are small-signal (-110 dBm), low-loss, high isolation, high reliability applications. Did I mention that they're expensive? Ed Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military & Avionics EMC Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
