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
