Multichannel Systems USB-MEA256-System Manual - Manual (Page 26)

USB-MEA256-System Manual
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Audio Output AUDIO
To the AUDIO OUT (3.5 mm phone jack) you can connect an audio system to make the electrical
activity audible. In contrast to the sound tool of MC_Rack, this audio output is real time. There
is almost no time delay between the detection of a signal by the recording electrode and the
corresponding sound. Headphones or a speaker can be connected directly to the AUDIO OUT.
Only one channel can be converted into sound. This channel can still be selected by using the
sound instrument of MC_Rack. You can listen only to Electrode Raw Data in real time. The quality
of the sound is mono.
Note: You can add only one sound instrument to your rack, and you can convert only one channel
into sound.
Analog Input A1 to A4
Four additional analog inputs are available (Lemo connectors).
The amplifier delivers analog data streams from 252 channels to the integrated data acquisition
and A / D converter of the USB-MEA256. The remaining four channels 127, 128, 255 and 256 are
used for the additional analog inputs Analog IN A1 to A4.
The additional analog inputs one to four are intended for recording additional information
from external devices, for example, for recording patch clamp in parallel to the MEA recording,
for monitoring the temperature, or for recording voice. You could also use the analog inputs
for triggering, but please note that the digital inputs, especially D0 IN are intended for accepting
TTL pulses. Signals on the analog channels are not amplified. They are only digitized and recorded
as they are, with no respect to the gain specified in MC_Rack.
USB
The USB connector is used to transfer the amplified and digitized data from all data channels
and the additional digital and analog channels to any connected data acquisition computer via
High Speed USB 2.0 (type A - mini B) cable.
GROUND
If an additional ground connection is needed, you can connect this plug with an external ground
using a standard common jack (4 mm).
POWER IN
Connect the power supply unit here. This power supply powers the USB-MEA256 main unit only.
The device needs 12 V and 1.3 A / 16 W.
Toggle Switch I / O
Toggle switch for turning the device on and off. The USB-MEA256 is switched to status "ON"
when the toggle switch is switched to the left to "I". The device is switched "OFF" when the
toggle switch is switched to the right "O". If the USB-MEA256 is "ON", and the device is
connected to the power line, the LED should light up. If not, please check the power source
and cabling.