Multichannel Systems USB-ME64-128-256-Systems Manual - Manual (Page 22)

USB-ME-System Manual
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Warning: Do not use the SYNC IN and SYNC OUT to connect the USB-ME256 to any other
device than another USB-ME-256 .
5.3.9 Audio Output
To the AUDIO OUT (3.5 mm phone jack) you can connect an audio system to make the electrical
activity audible. By software control, it is possible to convert signals from one data channel into
sound. A computer with a sound card and speakers or a headset is required. You can use this
feature to hear electrode raw data, for example, or to replay recorded sound. Or you can use
an analog channel as a sound input and record any sounds. Thus, you can add spoken commentary
to document your data.
Only analog raw data, electrode raw data, and filtered data can be converted into sound.
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.
5.3.10 Analog Input A1 to A4
Four additional analog inputs are available, separated from 68-pin MCS standard connector D
on the front panel, Pin Number 253, 254, 255 and 256. See Appendix chapter "Pin Layout”
(68-pin MCS standard connector).
The MEA1060 amplifier delivers analog data streams from 60 channels to the input connector
on the front side of the USB-ME256. Pin Number 1, 67 and 68 are used for the external power
supply, Pin Number 2 is for GNDS, grounding the signal. There are four free channels left, that
is for Analog IN A1 to A4.
The additional analog inputs A1 to A4 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 DIG OUT D0, are intended for
accepting TTL pulses. As the gain is generally completely different on the electrode inputs
and on the additional analog inputs, signals on the analog channels are recorded "as is",
with no respect to the gain specified in MC_Rack.
5.3.11 USB
The USB connector is used to transfer the digitized data from all data channels and the additional
digital and analog channels to any connected data acquisition computer via USB High Speed 2.0
(type A - mini B) cable.
5.3.12 Power Input
Connect here the power supply unit. This power supply powers the USB-ME256 main unit only.
The device needs 12 V and 1.1 A / ~13 W.
5.3.13 Ground
If an additional ground connection is needed, you can connect this plug with an external ground
using a standard common jack (4 mm).