pablohoney
Junior Member level 1
i have designed a 4.5-5.8 LC VCO. My problem is measuring(on wafer, probe station) phase noise of the oscillator. Since the VCO is free-running, the phase noise option of my spectrum analyser cant catch the exact carrier so i cant make a healthy measurement.
Another way i tried was reading directly from the spectrum analyser output (1 MHz offset from the carrier). but since the resolution bandwidth can not go down to 1 Hz, i still doubt whether my measurement is right.
What do you think the best way of measuring phase noise of a "free-running" oscillator. I need some advice about phase noise measurement.
Thanks.
Another way i tried was reading directly from the spectrum analyser output (1 MHz offset from the carrier). but since the resolution bandwidth can not go down to 1 Hz, i still doubt whether my measurement is right.
What do you think the best way of measuring phase noise of a "free-running" oscillator. I need some advice about phase noise measurement.
Thanks.