Multichannel Systems MEA1060-Up-BC Manual - Manual (Page 16)

MEA Amplifier with Blanking Circuit for Upright Microscopes
16
Connecting the amplifier to the stimulus generator
The following illustration shows the recommended setup for connecting a stimulus generator
to the MEA amplifier with blanking circuit. The amplifier is electrically connected to the stimulus
generator only during the short time of the blanking pulse. Therefore, a shielded cable that is
usually used for preventing the pick up of noise is not necessary. The first illustration shows a
typical monopolar stimulation setup. One output channel (usually +U) of the stimulus generator
is connected to either stimulus input A or B of the MEA amplifier. If you use two separate
stimulation patterns, connect channel 1 of the stimulus generator to stimulus input A, and
channel 2 to stimulus input B, and the corresponding ground for each channel to the ground
inputs (labeled G) of the MEA amplifier.
The next illustration shows a standard setup for dipolar stimulation. In this case, you connect
the +U outputs to either stimulus input (A or B) of the MEA amplifier. The U output of the same
channel is connected to the other input. The ground output of the same channel is connected
to either ground input (labeled G) of the amplifier. It does not matter, which ground input you
use, because both G inputs are internally connected. Usually, you will then select two neighboring
electrodes on the MEA for the dipolar stimulation, for example, electrode 33 for stimulus A and
electrode 34 for stimulus B.
For more information on the stimulus generator output signals, please see the Stimulus Generator
manual.