Multichannel Systems MPA8I Manual - Manual (Page 17)

Pin Layout
11
7.1.1 Test Model Probe
Test signal IN: You can use the jumper to connect the signal input pin (Signal IN) to ground
(standard situation for a noise level test), or you can connect a data source, for example, a sine wave
generator to the input (and the ground of the test signal to the signal ground input) to test the
signal distribution. The input signal is distributed across all recording channels.
REF IN: The standard situation in an experiment should be that the reference electrode has
properties identical or close to the recording electrodes. You can remove the jumper to connect the
reference output of the test model probe to the same resistors as the recording channels to mimic
the experimental situation, or you can use the jumper to connect the reference output to ground.
DC resistance 4.7 M
Dynamic
i
330 k
Capacitance 150 pF