I am probing the LLC test point in the development board and when the program starts I clearly see the 28MHz clock.
When I run the following script: "HDMI_IN_7611_HDMI_OUT_7511" the LLC starts running approximately at 110MHz but the amplitude reduces to about 600mV peak-to-peak (1.2V low, 1.8V high).
I probed with a 1" GND and have my scope at peak detect mode, record length 10M in a Tektronics DPO4054 that can read up to 500MHz.
I also set the DR_STR_CLK to 11.
- Why is this offset centered at 1.5V?
- why is it such a low amplitude?
- Do I need to change other settings?