The 660x spec sheet mentions that the Power-on state has a Input (high-Z) with weak pull-downs, but I cannot find a schematic with this weak pull-down resistor value.
I want to measure a clock signal on my DUT without loading or distorting the signal, so I plan to use a buffer. I'm concerned about the required drive current to overcome the built-in pull down resistors and the resulting threshold requirements of my PXI-6608 counter.
If anyone has a link to recommended buffers, level shifters, or a knowledge base article with an example circuit, it would be much appreciated!!