Have you looked at a Dickie (?sp) Switch? -John
=========== > In message <[email protected]>, Bob Camp writes: > >>The accuracy / flatness of the detector is only one part of the problem. >> >>In an RF system, the match to the detector can be a significant >>part of the error. If some of the power is reflected it messes up >>the reading .... > > No disagreement from here on that. > > What I played with, was a 50 Ohm termination a rotating mechanical > shutter and a IR sensor to see if it would be possible to level > three different frequencies to the same power-level, for calibration > of a HP3458A. > > For this particular _relative_ power measurement, I think > the method has merits, it it may be possible to use it > to calibrate relative to DC as well, thus making the > calibration absolute, but I need to work on the mechanical > setup some more. > > -- > 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. > > _______________________________________________ > 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. > > _______________________________________________ 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.
