Ganglion testing with a function generator
I am trying to test the ganglion with a function generator. I am using a voltage divider with 12 kOhm and 100 Ohm resistor , which brings the signal from the function generator from 500 mV peak to peak down to a measured 4.5 mV or 4500 uV - I am just using a basic sinewave as input. All filtering is turned off. At 2hz, the ganglion records the signal just fine:
I can increase the freqency to 5 hz and then this happens:
Basically any frequency >4 Hz produces a garbage signal - Now I can confirm with the scope, that the actual signal is still good.
So what is going on here? Is there some low pass filter on the device or active in the software, that I am not aware of?