I am using it with LMX259512GHz.
We are implementing the recommended power-on sequence.
1. About VCO calibration
I am monitoring the Vture terminal.
We designed 5 boards and confirmed the following phenomenon on only 1 board.
・ After setting all registers, the voltage will be set to 12GHz (1.3V).
・ After setting all registers, it becomes + 3V as it is, and after 10ms, it becomes 12GHz set voltage (1.3V) at register R0.
・ After setting all the registers, it becomes + 3V as it is, stays at the 12GHz set voltage (1.3V) for about 1ms at the register R0 after 10ms, and then changes to 0V.
Become.
Is it normal operation?
2. About the settings of FCAL_LPFD_ADJ and FCAL_HPFD_ADJ
I made a mistake in setting FCAL_HPFD_ADJ. At Fpd = 200MHz, set R0 (8: 7) 3: fPD> 200 MMHz.
Is the setting of FCAL_LPFD_ADJ and FCAL_HPFD_ADJ important when there is no assist?
I need to explain the details, so I would appreciate it if you could tell me more about VCO calibration.