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ADF5610 failed to set frequency

Category: Hardware

Hello, I'm debugging adf5610. Now I encounter a problem that how to set the frequency does not change. Verify that the SPI is correct by setting the high and low levels of the GPO of register 0x0f. The main parameters are as follows: CLK = 122.88M, r = 2, PFD = 61.44m. I test that the voltage at CP terminal is 3.3V. Is it caused by the loop filter setting.