Multichannel Systems MC_Rack Manual - Manual (Page 36)

MC_Rack Manual
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5. Start the second instance of MC_Rack.
6. Click "Data Source Setup" in Edit menu. Select the headstage you want to control with the second
instance of MC_Rack via serial number, for example MEA2100-32 (S/N:00018-B). Add the desired
data source. The data source and its serial number are displayed in the blue header of the dialog
of the "Rack" tab (second instance) as well as after the data source icon.
Opening an existing Rack File with MEA2100-32-System and multiple instances
of MC_Rack
If you build up (and saved) a complicated rack in the first instance of MC_Rack which you want
to reuse in the second instance of MC_Rack, please do the following: Start the second instance
of MC_Rack.
1. Click "Open" in File menu. The dialog "Open Rack Files" appears. Select the desired rack file.
2. Before the selected file will open in the second instance of MC_Rack, you have to change the
data source device specification from the copied file. That is why the dialog " Channel Layout"
in "Data Source Setup" will automatically appear again.
3. Please choose the appropriate MEA2100-32 headstage via block number, assigned the second
instance of MC_Rack.
4. Now the reused rack file will be opened in the second instance of MC_Rack. The data source
used for the rack is shown in the header and after the data source icon.
Note: Please do not miss one of the described steps when reusing an existing file!
Otherwise you have to delete the rack and start the instance of MC_Rack again.
Maximal Sampling Frequency
Usually, the maximal sampling frequency for MCS data acquisition systems is 50 kHz. However,
when using some advanced features of the USB-ME256 and USB-ME128, some limitations apply.
The maximal sampling frequency that can be achieved with 256 channels is 40 kHz. This is possible
when using the USB-ME256 with the "Virtual Device Configuration" 1 x 256 (Please see above).
With the USB-ME128 and USB-ME256 it is also possible to split the data stream into 2 x 64 or
2 x 128 and 4 x 64 channels, respectively, again by using the "Virtual Device Configuration".
These virtual machines can then be controlled independently by up to four instances of MC_Rack.
However, splitting the data stream into several virtual devices consumes system performance.
Therefore, the maximal sampling frequency is limited to 25 kHz when using the virtual device
configuration 2 x 64 (USB-ME128) or 2 x 128 and 4 x 64 channels (USB-ME256).
The Additional Analog Channels A1 to A4
The devices USB-ME256, USB-ME128, USB-ME64 and USB-MEA256 are equipped with four
additional analog channels A1 to A4. Please refer to the respective manuals.
The additional analog channels A1, A2, A3 and A4 are available in MC_Rack data display
and in MC_Rack long term display.
Note: Because of the different scaling of electrode data channels and the additional analog
channels, it is recommended to visualize the analog channels in a separate display.