Hi Said, The J06-59992A Time interval calibrator is quite a simple unit. It's basically a pair of RF power dividers, one 0 deg the other 90 deg and a couple of relays to swap the signals around. One selects in phase or 90 out of phase, the other swaps the start and stop signals. The first is a simple relay, the second an Omron 50R RF model with carefully laid out tracks. There is also a DC block and a circuit to apply a DC offset if your signals have one. The manual is on the HP archive, thanks to Jack Hudler. The dividers are current Mini-Circuits models but I guess that they are not critical. It's on my list to build one. I was going to use a 4 port "transfer" type coaxial relay to do the start-stop swap, this should have even better balance than the Omron and PCB tracks, and has direct SMA output connectors. The HP unit also has an HPIB control for automatic use but this is optional. It's discrete logic so even that could be copied.
HTH, Robert G8RPI. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 11 June 2007 07:13 To: time-nuts@febo.com Subject: Re: [time-nuts] another Ebay mixup, 5370 In a message dated 6/10/2007 19:04:25 Pacific Daylight Time, [EMAIL PROTECTED] writes: >However there are some capacitively (critically?) tuned resonant >circuits which will need some care to adjust correctly. >Bruce I'll give it a try, after taking close up pictures of all the trim-caps settings, and hoping they don't have any hysteresis... Still worried that I don't have the required equipment though. bye, Said ************************************** See what's free at http://www.aol.com. _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -------------------------------------------------------- Genetix Limited - Queensway, New Milton, Hampshire, BH25 5NN Registered in England No. 2660050 www.genetix.com Any opinions expressed in this email are those of the individual and not necessarily Genetix Ltd (Genetix) or any company associated with it. This email and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this email in error and that any use is strictly prohibited. If you have received this email in error please notify Genetix by telephone on +44 (0)1425 624600. The unauthorised use, disclosure, copying or alteration of this message is strictly forbidden. This mail and any attachments have been scanned for viruses prior to leaving Genetix network. Genetix will not be liable for direct, special, indirect or consequential damages as a result of any virus being passed on, or arising from alteration of the contents of this message by a third party. -------------------------------------------------------- _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts