many thanks for your your answer. To be honest, i've read this line in the Manual but i didnt understand that because i can measure the right value via the BNC connectors with an oscilloscope.
Does the gain mean, that i have to multiply my output signal with 1/gain? To be more precisely: If i would like to have a value of 1V on my ADC Pin, should i send a value of 1/0.65 = 1.538.. out of my box?
Thanks a lot!