Hello Joe,
I haver not gotten overly concerned with measuring power levels.
I do have a pair of HP-432 power meters on the bench and I periodically
do a comparison.
With their sensors they are spec'd for about 1% accuracy.
With a Bird 43 I believe the accuracy is 10% of full scale, a bit coarser.
So, with 10 KW of RF and a 10 KW slug the accuracy is 10KW +/- 1,000 watts.
With directional couplers or power attenuating pads I can go up to about
500W.
The HP-435A/B also have the internal reference source at 50 MHz.
The only reason I have considered upgrading from the HP-432 is to get
a 2 channel power meter and readings available on the HPIB.
Stan, W1LE Cape Cod FN41sr
Joseph Gray wrote:
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
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