Multichannel Systems MEAS21+MEASwitchUSB Manual - Manual (Page 9)

5
3 First Use of the MEA Switch
3.1 Welcome to the MEAS2/1
The MEAS2/1 allows to acquire data from 60 single channels from two 60 channel amplifiers.
If you have a 128-channel MC_Card or an USB-ME128-System, you can even pick 128 channels in
total from two MEA pairs with the MEAS4/2 for four amplifiers. Selected channels are combined
to a single electrode raw data stream that is delivered to the MC_Card or to an USB based data
acquisition of the computer by a 68-pin MCS high grade cable. This is useful if you do not need
all 60 electrodes on a MEA, for example, because the cell culture or the slice does not cover the
whole MEA, but rather single electrodes.
The channel selection is mutually exclusive, that means, if you pick channel 21 on one MEA,
you cannot select channel 21 on the other pair. The MEAS2/1 is software-controlled by the
program MEA_Switch via USB port.
The MEAS2/1 does not replace a Signal Grounding Unit. That means, the channels that are
not selected are only removed from the input data stream, but they are not grounded. If you
have bad electrodes that produce noise, the noise can still interfere with your input signals.
You need an external power supply for operating the MEAS2/1 , for example, the PS40W.
The following pictures shows the rear panel of the MEAS2/1 with the output channels,
the USB port, and the power supply inputs.