Ian, I built a switch system using relays from Teledyne. <http://www.teledynerelays.com/pdf/coaxialswitches/CCR-38.pdf> <http://www.teledynerelays.com/rfswitch s/SwitchPdf/CCS-18_SP3T_SP6T_OpenFinal.pdf> The first is for the input (low power) and the last is for the output (high power). We've had very good luck with these. We manually switch, using a serial 9 pin switchbox to switch amps (we have three). I have wired the fourth position of the switchbox for external control if we ever need it. The coax switches are mounted in a small 19" rack mount cabinet, and include directional couplers for each amp. The forward ports of the couplers also have a low power coax switch going to the power meter. For serial or GPIB remote control, I would recommend either an HP3488 or 3499 with suitable switch cards. Both are GPIB, the 3499 I think also has serial. You can even get built-in coax switch cards for these, but only for low power. The controllers and cards can be found on ebay, I have bought a couple from there. A more high-end solution would be an HP34970 which can also do data acq. Information for all of these can be found on the Agilent site by doing a search for 3488, 3499, 34970, etc Hope this helps. Bob Richards, NCT
"Gordon,Ian" <[email protected]> wrote: All We have two amplifiers: one which goes from 80MHz to 1GHz and a new one which goes from 0.8 to 3GHz. Can anyone suggest where I might find a suitable switch that would ideally be controlled by RS232/USB/IEEE 488 which would allow me to change between amplifiers at, for example 1GHz during the test? A manual switch would be acceptable but not ideal. Ian Gordon *********************************************************************** The information contained in this email and any attachments may be confidential and is provided solely for the use of the intended recipient(s). If you are not the intended recipient, you are hereby notified that any disclosure, distribution, or use of this e-mail, its attachments or any information contained therein is unauthorised and prohibited. If you have received this in error, please contact the sender immediately and delete this e-mail and any attachments. No responsibility is accepted for any virus or defect that might arise from opening this e-mail or attachments, whether or not it has been checked by anti-virus software. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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 [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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 [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
