Troubleshooting
13
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”
.
Summary of Contents for USB-ME128-System
Page 1: ...USB ME System Manual USB ME64 System USB ME128 System USB ME256 System...
Page 35: ...Index 31 7 Index...
Page 36: ...USB ME System Manual 32...
Page 38: ...34...
