Why, you use your 8082A! I got one for a steal a couple of years ago on EBay. However, all you really need is a fast rise-time pulse generator that has external triggering and a variable trigger delay, and can generate a +1/-1 volt swing. The frequency the tests use aren't that critical, anything 1Mhz or higher should work. The only semi-critical parameter is the rise time; the faster it is, the less trigger uncertainty you'll have. 1ns is good. :) Also, unless the delay time setting is rather fine, it's extremely difficult to actually do the anti-coincidence alignment. What I'm missing is a spectrum analyzer, so I haven't done the frequency multiplier alignment on either of my 5370s. Any tricks for doing that without one? Bill Ezell ---------- They said 'Windows or better' so I used Linux.
Chuck Harris wrote: wje wrote: Freq vs time interval - simplistic answer: when you're using time-gating, you're looking at more samples than in averaged one-period mode. For 10Mhz, a gate of 0.1 secs is 1 million periods. In period mode, you're averaging a maximum of 100,000 periods. Accuracy is proportional to the square root of the number of samples. Also, the trigger point jitter when in one-period mode affects every sample, but when in gate mode it only affects the first and last cycle. The 'specifications' section of the manual gives the formulas for determining both resolution and accuracy (which are NOT the same) for the various modes. I would suggest you go through the detailed alignment procedures even though the unit passes the operational checks. These units almost always have drifted out of alignment in the analog front-end unless you were lucky enough to get a freshly-calibrated one. You can usually significantly improve channel-to-channel trigger consistency and lower the jitter by doing so. What does one do where the tests call for an HP8082A pulse generator? The silly things are so rare that they are priced in the stratosphere! -Chuck Harris _______________________________________________ time-nuts mailing list -- [EMAIL PROTECTED] To unsubscribe, go to [2]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. mailto:[email protected] 2. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ 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.
