In message <3b0b-5b6dce00-7-74cd9280@7251666>, "Henk Peek" writes:
> The noise bandwidth of a HP3458 166ms measurement is 6Hz. >> 2) If I look at the documentation of the HP3458, they reach 28bits at 166ms >> integration time. Sorry but that does not mean what you guys think it means. The clue that something interesting is going on, is the subtle differences between Fig 9 on page 13 and Fig 7 on page 44 in the HPJ issue. The latter one says more about the raw ADC performance, but the Y-axis: "ADC Aperture time", probably does not mean what you think either. The hint to that is in the first column on page 11: "The HP 3458A resolves the first 4½ digits during runup and the final 4 digits during rundown to achieve an 8½ digit reading... The software really is very very clever, I can highly recommend a close study of it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com and follow the instructions there.
