I use this for my qs1r (125MHz) and to discipline a sound card (24.576MHz).
http://www.valontechnology.com/5007%20synthesizer.html http://www.valontechnology.com/3008%20divider.html I actually have one 5007 sandwiched between two 3008's within a Hammond enclosure I built. Has voltage in, 10MHz in and two frequency outputs. I don't have the setup to measure phase noise but seems to do a decent job for my purposes. Bill Sent from my iPad > On Sep 28, 2014, at 5:24 AM, Dr. David Kirkby (Kirkby Microwave Ltd) > <[email protected]> wrote: > > I am looking for a quick & simple way to create a frequency of 200 MHz from > 10 MHz. Actually 100, 200, 300 or 400 MHz would all work, but 200 MHz > would be my preference. > > The input will be around 0 to +10 dBm and the output needs to be about +13 > dBm. > > I did think of a x5 & x4 frequency multipliers and amplifiers from > Minicircuits, but I don't know if the increase in phase noise might be a > problem. The truth is I don't know how good it needs to be! > > I am trying to find a way of building something that will allow my HP 8720D > VNA (50 MHz-20 GHz) to work below 50 MHz. My idea was to generate a 200 MHz > local oscillator to feed a mixer. > I was thinking of making it so as the VNA sweeps from 200.01-250 MHz, itthi > possible to analyse a DUT over the frequency range 0.01-50 MHz. > > Having the an integer multiple of 100 MHz is good, as it makes reading the > VNA easier. It is simpler to use if the VNA display shows the frequency 200 > MHz off than if its 212.5564 MHz wrong. > > I would rather not have to program anything to do it, but maybe a VCO and > PLL is the only sensible approach. > > I can't seem to find an off the shelf solution which I can lock to a 10 MHz > reference. There are plenty of 200 MHz oscillators around based on a TCXO, > but I can't lock them to the 10 MHz oscillator the VNA uses. Maybe someone > knows of a device I don't know of. > > Dave. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
