From: Henk ten Pierick <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Fast frequency counting question Date: Sun, 4 May 2008 22:08:49 +0200 Message-ID: <[EMAIL PROTECTED]>
> Hi, > > My first choice would be the HP533130A. The HP533130A is a > interpolating counter with a scope-like display. It has the > resolution you need. The resolution is determined by the time/div > setting and the vertical scale. It divides the horizontal display > time in 250 or 450 time slots, depending on time or frequency > measurements. In a slot, the first sampled edge is timed, the rest > counted. edge timing is done as 5370 and 53131/2. Sampling can be set > manual or automatic. If you understand the working principle, it is a > fantastic instrument. If time/div is to long you are losing > bandwidth, if it is to short noise increases. Read the manual. The > reference is very clean. Also available is the HP53305 software via > gpib. The HP53310A (which I think you are really refering to) has a single shot resolution of 200 ps which is not sufficient for this. For this application single-shot resolution and jitter is really THE limiting factor. I will see if my Wavecrest can handle it. I can test-fire against HP 5372A and CNT-90 too. I have never thought of the first ms or so as being critical, so I have never bothered to measure it. Interesting problem. :) Cheers, Magnus _______________________________________________ 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.
