Multichannel Systems Portable_ME-System Manual - Manual (Page 17)

The Portable ME-System
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The 16 bit digital input channels is a stream of 16-bit values. The state of each bit (0 -15) can be controlled
separately, the state can be HIGH (1) or LOW (0). Standard TTL signals are accepted as input signals on the
digital inputs. Unused input bits, which have an undefined state, should be masked in the Trigger Detector
of MC_Rack.
Warning: A voltage that is higher than +5 Volts or lower than 0 Volts, that is, a negative voltage,
applied to the digital input would destroy the electronics. Make sure that you apply only TTL pulses
(0 - 5 V) to the digital inputs.
DIG OUT D0
The Bit 0 of the Digital OUT D0 is also accessible independently from the 68-pin Digital IN / OUT connector.
The digital output channel D0 is generally used for synchronizing the Portable ME16-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.
DIG IN D0
The Bit 0 of the Digital IN D0 is parallel to Bit 0 of the DIG OUT independently available from the 68-pin
Digital IN / OUT connector. The digital input channel D0 is generally used for synchronizing the Portable
ME16-System with another device, or with another data acquisition system, for example, an imaging or
a patch clamp system. The DIG IN D0 accepts standard TTL pulses.
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. Two channels can be converted
into sound (Stereo). The real-time audio output can be configured in the data source tool of MC_Rack.
Please refer to the MC_Rack manual for details.
USB
The USB connector is used to transfer the digitized data from all data channels and the additional digital
channels to any connected data acquisition computer via USB high speed 2.0 (type A - mini B) cable.
POWER IN
Connect here the power supply unit. This power supply powers the Portable ME16-System main unit only.
The device needs 12 V and 1.1 A / ~13 W.
I / O
Toggle switch for turning the device on and off. The power LED on the front panel should light up as soon
as the system is connected to the power supply and the I / O toggle switch is switched to status "I = On".
GROUND
If an additional ground connection is needed, you can connect this plug with an external ground using
a standard common jack (4 mm)