I am working on a redesign of a test box we have at work. There is a transmitter that is sending data to a recording system (in my case the dewetron trendcorder with Trion BNC modules). We previously outsourced the design of this test box and that company used unity gain buffers from the transmitter side into the recorder.
The output impedance of our transmitter is less then 10K ohms and the input impedance of the recorder is 10M ohms. With that ratio I am not worried about a significant voltage drop but I am worried about channel ghosting as we will be switching channels. The trion module doesn't specify the input capacitance for its internal ADC.
We are trying to make this redesign as simple (and cheap) as possible and not having to design a PCB (even though its fun!) would save a lot. I am trying to decide if the vendor was overly cautious with these unity gain buffers or if they do serve a purpose. I am using this tutorial from NI for reference. Ghosting tutorial
I am leaning towards the side of just designing the PCB to be safe. Is there something else I need to be aware of here?