Don, you mention digital attenuators. What parts do you have experience with? I am in the midst of a signal generator design for a club build project. Looking at digital attenuator parts now, but many are spec'd in the GHz range. Looking to get down to -140 dBm from +20, or as close to this range as possible. TIA
Russ On Wed, Dec 12, 2018 at 11:00 AM <[email protected]> wrote: > > Rick: I've spent some time with the dds blocks. We found them to > generate lots of low level spurs, making lots of "birdies" when used as > local oscillators in receivers. > We had better results using: > https://www.silabs.com/products/timing/oscillators. > > These may be used with GPSDO clocks for accuracy, and generate less > noise. Cost is about the same; there are two or three sources for > breakout units. The clock sources do have to be 25/27 MHz, those from > Leo Bodnar, or use an OCXO. Digital attenuators are also available; all > this can be run from an Arduino with oled or other readouts, libraries > abound. And for quick and fancy GUI, on a pc, use MakerPlot. > Just $.02 > Don > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
