There is a question about the phase noise measurement method of HMC509.
In the data sheet, Phase noise is specified as -115 dBc / Hz@typ when 5V.
When the Vtune is 5V, I wonder if it is possible to construct the circuit as shown below to measure the phase noise of the HMC509.
1. Connect + 5V to VCC using a DC power supply.
2. Connect + 5V to the Vtune using a DC power supply.
If I have the above configuration and the phase noise is not -115dBc, is it due to the noise of Vcc and Vtune voltage?
Do you need a separate power circuit to test the HMC509 evaluation board?