Thanks Rick. My main reason for buying this is to be able to better measure the phase noise of my 100 MHz oscillator. I figured this would give a truer measure than a brick since there is no PLL involved. But then I thought there might be too much filtering going on. If the filters are at least several MHz wide, then it should be fine, but if there is a 100 MHz crystal filter in there, then it won't really give me a true measure.
What do you think? Thanks, Matt On Mon, Apr 28, 2008 at 4:15 PM, Rick Karlquist <[EMAIL PROTECTED]> wrote: > I worked for Zeta Labs many years ago. This multiplier > undoubtedly has a step recovery diode that is being driven > at a level of a good watt or two. In most cases there was > a hefty transistor to make this power. You probably need > +10 dBm or so to drive it, maybe as much as +20 dBm. Take > the cover off and look at the input section and it should > be apparent if there is any additional gain. You can always > start at 0 dBm and work up, looking at the power out as you > go along. The adjustment of these can be very tricky, so > proceed with extreme caution. Especially the SRD assembly. > There were rows and rows of technicians with sweepers who > tuned these up. The sweepers would sweep typically 80 to > 120 MHz. Some of the techs liked to listen to the radio > as they worked, and since this frequency range encompased > the FM band, the radio would make a woodpecker like sound > all day long. > > The Zeta multipliers were fairly similar to the multiplier > in the well known "brick" frequency sources (California > Microwave, etc). Many people worked at both companies at > various times. > > Rick Karlquist N6RK > > > > > Matt Ettus wrote: > > Just bought a > > > > Zeta Labs X76 Multiplier 7600 MHz Output Model 5856-01 > > > > on ebay. Anybody have any info on these? What kind of drive should I > > give it? > > > > Thanks, > > Matt > > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
