Other Parts Discussed in Thread: USB2ANY, LMX2820
I am testing the Evaluation Module LMX2820EVM at 6 GHz and I have not been able to confirm the phase noise specification ( page 7 of the User Guide).
The phase noise is higher by 4 to 5dB from 1khz to 100Khz.
At 1Mhz it is only 1db higher and in spec at higher offsets.
I am using a low noise 100MHz "RF Plate" from Wenzel Associates. The 100MHz reference power I used is 12dBm The phase noise data measurement has been validated on 2 different set-ups.
The phase noise has not improved by using the input Doubler and Fpd 200MHz.