MULTICHANNEL SYSTEMS USB-ME128-System, Системное руководство

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USB-ME-System Manual
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5.3.7 Digital Output D0
The Bit 0 of the Digital OUT is also accessible independently from the 68-pin digital IN / OUT connector.
The digital output channel D0 is generally used for synchronizing the
USB-ME-System with a stimulus
generator, or with another data acquisition system, for example, an imaging or a patch clamp system.
The DIG OUT D0 generates standard TTL pulses.
5.3.8 Synchronization Out- and Input
If you want to use several USB-ME-Systems in parallel, the SYNC OUT and SYNC IN can be used to
synchronize the individual devices. The SYNC OUT of the first device must be connected to the SYNC IN
of the second, and so on. The cable for connection must have Lemo plugs on both heads.
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.