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The HMC586LC4B is a wideband GaAs InGaP Voltage Controlled Oscillator which incorporates the resonator, negative resistance device, and varactor diode...
HMC586 on Analog.com
How to test the phase noise of VCO. VTune access + 5V DC power supply？
For example HMC586
Yes, to test the phase noise, you just need to apply a 5v with an adequate current limit. Then apply a Vtune between 0v and 18v to the Vtune terminal an connect the RFOUT to a suitable phase noise…