Hi Tom, Ulrich, can't seem to get 12 digits/s out of my 53132A in frequency mode when doing measurement offset of -10MHz. I only get 11 digits/s for some reason. Have to go to 10s + gate time to get better resolution. But I think I discussed this before on this forum, the highest resolution time interval counter available at hobby price points on Ebay is the Wavecrest DTS series, and several members of this forum use these quite successfully. They have a nice Windows based user interface via GPIB, or front-panel operation. DTS-2075 for example has 0.8ps(!) hardware resolution, 10ps typical noise rms (I see more like <3ps rms noise on my units), and +/-30ps single shot accuracy. They are self-calibrating using front panel buttons and some SMA cables. Lastly they can do cable-length measurements to below 1ps resolution! That combined with 40K samples/s gives a lot of bang (for the buck). You can measure period jitter against the internal oven with a typ. noise floor of 3ps, or frequency stability against an external reference. Low end units will measure DC to above 1GHz. I have bought working units on Ebay for less than $500 in the past. But they won't please everyone, they are clunky/noisy, and consume a lot of power. bye, Said In a message dated 10/9/2008 00:30:04 Pacific Daylight Time, [EMAIL PROTECTED] writes:
Ulrich, Check out a Pendulum Instruments CNT-91 time stamping counter. You'll find much better resolution. This counter doesn't work the way other direct/reciprocal counters do. It has 50 ps resolution time resolution and 12 digits per second display. Tom Tom Duckworth 510-886-1396 **************New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & more. Try it out! (http://local.mapquest.com/?ncid=emlcntnew00000001) _______________________________________________ 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.
