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Measurements compared to the Simulation Results from AdiSimPLL

Category: Hardware
Product Number: EV--ADF41513

Hello,

i have simulated an Integer-N PLL for single output frequency at 10GHz, for my simulation and for measurements I am using the HMC588 VCO. The report from AdiSimPLL says that i should expect a final tuning-voltage of 2.3405V. When the Pll is in locked state a measure about 3 Volts, so I am about .7V off.

From the datasheet of the HMC588 I would also expect about 3V so why is the AdiSimPLL Simulation so far off?