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AD8302 Phase error measurement

Question asked by moto on Mar 24, 2014
Latest reply on Apr 1, 2014 by moto


I saw "AD8302 360 degree phase measurement" disscussion.

Are there tricks and traps when we measure the phase error?
I expect a few degree error feature for AD8302.


A large input, ex -10dBm, might degrade phase error feature?
Unbalanced level inputs does not influence.
A 90 degrees phase shifter of #3286 will degrade the phase error even fixed frequency ?

It usually measure by vector network analyzer, I think.
AD8302 datasheet TPC26 is measured by such VNA?

Using the passive phase shifter is possible to measure a few degree error?