I want to fan out the clock with a maximum of 1.5GHz through hmc7043, and synchronize the outputs. But at present, it can only fan out 1GHz normally. When the input frequency is 1.1GHz, only the fundamental mode can be selected. Once the analog delay mode is selected, the output waveform is a mixture of various frequencies, which is very confusing. When the input frequency increases again, the fundamental mode can not output the waveform normally. Why is that?
HMC7043 can work with input frequencies up to 6 GHz normally. Can you share your register configuration and specify which output that you are using?
Hi,thank you for your replay.
My register configuration are configured in the following order:
I only write values to 0x00A0 of all the reserved registers .
the output channel ,such as channel 6
My output driver mode is LVPECL,connect to AD9136 through ac coupled.，it can be uesd normally at 1GHz.
When the frequency rises，sharp drop in amplitude,waveform distortion.And when i remove this part，HMC7043's output is normal again.What should i do to correct it.
And are these two input capacitances necessary，
when the up level is ADF4351's output，.
Thank you very much