Some time ago, i've found documentation on microwave prescalers, (from Hewlett-Packard/Agilent) that could count up to 18 GHz.
Tonight, i've found those SiGe prescalers from NEC: µPB1510GV .5-3 GHz div. by 4 prescaler: http://www.ncsd.necel.com/microwave/english/pdf/PU10311EJ01V0DS.pdf µPB1512TU 5-13 GHz div. by 8 prescaler: http://www.ncsd.necel.com/microwave/english/pdf/PU10537EJ02V0DS.pdf µPB1514TU 8-16 GHz div. by 8 prescaler: http://www.ncsd.necel.com/microwave/english/pdf/PU10541EJ02V0DS.pdf Bizarre that no prescalers have been developed to work on the 3-5 GHz band... >From Agilent, i've found the following differential in/out 16 GHz prescalers (based on the HMMC-31xx /2 /4 and /8 12/16GHz prescalers): www.avagotech.com/assets/downloadDocument.do?id=528 Nothing indicates a minimum working frequency, if it can go down to the sub-GHz, that could be an interesting product. On another site, i saw that the HMMC-3102 3104 and 3108 prescalers cover from 500 MHz up to 16 GHz. Link: http://www.datasheetcatalog.com/catalog/p382200.shtml 73 de Normand VE2UM Montreal, Qc. Canada --- David Forbes <[EMAIL PROTECTED]> wrote: > At 5:11 PM +0000 12/18/06, [EMAIL PROTECTED] > wrote: > >12-18-06 > > > >Is it possible to lock a 10ghz gunn diode > transceiver (supply > >voltage 10.00 vdc) to a 10 mhz standard? Signal > applied to either > >gunn diode or varactor supply voltages. > > > >Rick > > Rick, > > Sure it's possible. I work on radiotelescopes that > use 100 GHz gunn > diode oscillators, phase-locked using a box called > the STS XL-800. > Unfotunately, those boxes cost several thousand > dollars and aren't > readily available on ebay. > > The basic method is the same as any > voltage-controlled oscilator, but > you have to supply a good bit of current to the > diode and you need to > have a well-controlled driver so that you don't burn > it out. > > The usual method of sampling the Gunn frequency is > to mix it down > using a harmonic mixer to produce an IF frequency > that's usable in a > generic PLL, some tens of megahertz. > > All of the above is a rather complicated piece of > hardware by the > time you're done. It's not a task for the timid. > > -- > > --David Forbes, Tucson, AZ > http://www.cathodecorner.com/ > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
