One of the inputs on the 3596B is a 75ohm, another is a 10k ohm//50pf.
?I can understand with a Voltage across a 75 ohm resistor how? to get
a power reading. What happens when you switch the unit to 10k ohms.
Does it start measuring Voltage across a 10k, and do that calculation.
?The question arose when as? practice for OpenOffice I thought I'd calculate how the power reading
misbehaves, if I terminate the input with 50 ohms and measure a fixed voltage from 1MHz to 32MHz.
?The 50pf throws a changing impedance in the mix.
In OpenOffice I combined 50ohms, 10k ohms and the 50pf cap impedance to get a total impedance over the frequency span.
Then when I went to calculate power, I didn't know where the machine would be referenced.
?Please note, my concern is not really to do the measurement this way is is just an exercise to practice OpenOffice and draw a graph of the error.
