To all interested in this matter. There is an excellent application note on power measurement available on Agilents web site. http://cp.literature.agilent.com/litweb/pdf/5989-6255EN.pdf Fundamentals of RF and Microwave Power Measurements Another outstanding application note can be found on Rohde and Schwarz web page. http://www2.rohde-schwarz.com/file_2212/SLMESS_E.PDF voltage and power measurements. For sure this list is not complete, think of Tegam as well, but a good point to start with.
To verify the output of a 30 / 50 MHz to less than might be 2 % the easiest way is to use a HP 432 powermeter with a 478A powersensor (thermistor mount)and follow the procedures given in the 436A manual. Just take a calibration factor of 99 % if not known more exactly. If you want to be more precise in test get a sensor calibrated at a higher level, and at the highest level (national institutes) you will achieve less than 0.2% fort he calibration factor. There is no easy way to have the highest precission in RF and Microwave power measurement. If you have detailed questions on this matter contact me offline and I will try to answer your question. Good luck in calibrating powersensors! Hubert DB7ME -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von Adrian Gesendet: Dienstag, 1. Dezember 2009 14:25 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts] OT: Power level reference Joe, the HP 434A calorimetric power meter does the trick as it works from DC to 12.4 GHz. And, it measures 10 mW to 10 W full scale. http://www.hpmemory.org/wa_pages/wall_a_page_10.htm Just scroll 2/3 down. Adrian Joseph Gray schrieb: > We all have our various highly accurate frequency and perhaps time > references. Is there a relatively simple and inexpensive method of > making an accurate RF power level reference? If so, then what do we > calibrate it with, not already having such an accurate reference? > > One possibility that comes to mind is an HP 436A power meter. These > are abundant and usually have no sensor probes (which are expensive). > They also have a built in 50MHz, 0dBm reference. However, without more > fancy test equipment, I have no way to calibrate the reference, or > even verify that it is accurate. > > Joe Gray > KA5ZEC > > _______________________________________________ > 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. _______________________________________________ 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.
