Here is what I have learned about switches this week. There are very low power rated switches for usual ATE applications, power switches (circa 200W) and high power switches. For power switches, the insertion loss is in the order of 0.2 db over a very wide frequency range (DC to many GHz). The power rating is based upon the power than can be conducted through the switch - not switched. The power must be turned off before switching or be about 1-10% of the rating while switched to prevent premature failure of the contacts. A minimum power of about -20dbm must be used to overcome the losses in the switch. Options include type of connector (e.g., SMA, N, indicator contacts, latching type, and others. GPIB controllers are available for controlling switches. My particular application is to add to our radiated immunity setup. We are adding a 1-2GHz amp and directional coupler. I have to switch the signal generator between two amps, switch the antenna to the directional couplers and switch the power meter to the couplers - 3 relays. I plan to use a simple, manual two position switch to control the three relays and think about automation later.
You can find a wealth of information at www.dowkey.com. Richard Woods Sensormatic Electronics Tyco International -----Original Message----- From: Jim Eichner [mailto:jim.eich...@xantrex.com] Sent: Wednesday, May 22, 2002 3:55 PM To: emc-p...@majordomo.ieee.org Subject: RE: Coaxial Switches - use with spectrum analyzer and gear? In our pre-compliance lab, we've got a pair of LISN's, a LISN-mate type thing that I'll call a DMRN (DM rejection network), a transient limiter, some clamp-on RF current probes, an amplifier, the front end of the analyzer, and a 50 ohm terminator. All this gear is connected and unconnected a hundred times a day when we're deep into trouble-shooting, and I'm sick of doing up and undoing coax connectors. I don't trust push-on coax connectors. What I envision is a system with a few of these coax switches in it. The analyzer input would go to a switch that selected either the amp (used only with the clamp-on probes) or the transient limiter (used with the LISN's). The limiter input would go to a switch that selected between the output of the DMRN or the Line LISN or the Neutral LISN. Etc. You get the idea. Is there anything to stop me from using coax switches with suitable CW power, insertion loss, and frequency spec's? Am I headed for trouble if I have 2 or 3 of these switches in the signal path, due to cumulative insertion loss? Thanks for your feedback, Regards, Jim Eichner, P.Eng. Manager, Engineering Services Xantrex Technology Inc. Mobile Power web: www.xantrex.com <http://www.xantrex.com> Any opinions expressed are those of my invisible friend, who really exists. Honest. Confidentiality Notice: This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. -----Original Message----- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Tuesday, May 21, 2002 7:45 AM To: emc-p...@majordomo.ieee.org Subject: Coaxial Switches Other than Adilent, what are some other sources for low power (<1W) and high power (>100W) coaxial switches for frequencies up to 2 GHz? Richard Woods Sensormatic Electronics Tyco International ------------------------------------------- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
