Multichannel Systems USB-ME64-128-256-Systems Manual - Manual (Page 15)

Troubleshooting
11
5.1.9 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.
5.1.10 Analog Input 1 to 4
When connecting a MEA1060 amplifier to the USB-ME64 data acquisition, four additional analog
inputs are available, separated from 68-pin MCS standard connector on the front panel, Pin
Number 63, 64, 65 and 66. See Appendix chapter ”Pin Layout” (68-pin MCS standard connector).
If you connect, for example two 32-channel miniature preamplifiers MPA32I, no additional analog
inputs are available, all channels are used for recording.
The MEA1060 amplifier delivers analog data streams from 60 channels to the input connector on
the front side of the USB-ME64. Pin Number 1, 67 and 68 are used for the external power supply,
Pin Number 2 is for grounding the signal, GNDS. There are four free channels left, Pin No. 63, 64,
65 and 66, that is for Analog IN 1 to 4. In MC_Rack you see the analog channels on channel 61,
62, 63 and 64.
The additional analog inputs 1 to 4 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.
5.1.11 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.
5.1.12 Power Input
Connect here the power supply unit. This power supply powers the USB-ME64 main unit only.
The device needs 12 V and 410 mA / ~5 W.
5.1.13 Ground
If an additional ground connection is needed, you can connect this plug with an external ground
using a standard common jack (4 mm).
5.1.14 External Power Supply
Plug in for the external power supply, for example, PS40W. The PS40W is a standard power supply
delivering supply voltages to connected devices. Please read chapter “External Power Supply”.