If you look at the E4419B's power meter data sheet there is a declared absolute accuracy of +/-0.02dB. The spec also states that you need to add in the linearity deviation if you exceed a certain power level to the sensor. Based on many readings I have done, it seems that if you stay below that power level then you can assume that sensor linearity deviation is fairly negligible. Perhaps this is a wrong conclusion. When I use Agilent's uncertainty calculator I am somewhat confused in how to interpret the results. After I factor in the sensor choice, and provided I stay within the best linearity range, I end up seeing uncertainty levels as follows:
ULU: +0.075dB
LLU: -0.076dB
It seems that one would never be able to hit the +/-0.02dB spec if the uncertainty is so much greater. What am I missing here?
ULU: +0.075dB
LLU: -0.076dB
It seems that one would never be able to hit the +/-0.02dB spec if the uncertainty is so much greater. What am I missing here?
if I'm wrong there, hopefully someone can correct me and educate us both.