Sun Nov 26 19:16:22 EST 2006
in/out 16 GHz prescalers (based on the HMMC-31xx /2 /4
and /8 12/16GHz prescalers):
Nothing indicates a minimum working frequency, if it
can go down to the sub-GHz, that could be an
On another site, i saw that the HMMC-3102 3104 and
3108 prescalers cover from 500 MHz up to 16 GHz.
73 de Normand VE2UM
Montreal, Qc. Canada
--- David Forbes <dforbes at dakotacom.net> wrote:
> At 5:11 PM +0000 12/18/06, stork3264 at comcast.net
> >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.
> 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
> time-nuts mailing list
> time-nuts at febo.com
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