Phase measurement RFSG RFSA

[Kalash]

Hello,

Currently, I work with RFSA and RFSG to analyse signal wich is generated by the RFSG. I would like to measure phase in my RFSG module to do the AM/PM characteristics. For now, i didn't find any functions to measure this phase. Moreover, i found a function for phase measurement for RFSA but it did not work. This function is Get Frequency where we can have phase too.

So i would like help to measure phase in RFSG and RFSA .

Thanks for your help

[cochenob]

You should be able to measure phase directly from the IQ samples returned fro the RFSG ( arctan(Q/I) ).  However, there is a simple polymorphic VI that you feed in IQ samples....and out comes magnitude or phase.  I can't remember the exact name of the VI, but it's easy to find.

Note...if you don't lock the RFSG and RFSA together via the 10MHz reference....the phase you measure may be corrupted due to clock drift.  Locking the two via the 10MHz reference will eliminate the frequency drift between the clocks....though you may end up with some constant phase offset that you could then subtract off.  However...this constant offset would likely be different every time you turned the devices on and off.

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Brandon