Multichannel Systems STG4002 Manual - Manual (Page 52)

Stimulus Generator 4002 Manual
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8.1.1 Download Modes
Default Mode
When downloading files created in MC_Stimulus II software to a stimulus generator of the
STG4000 series, two different download modes are available. In "Default Mode", for each
download all channels are stopped and cleared before the new paradigm is downloaded.
All available channels are downloaded one after the other regardless of the space each channel
needs, which means that the available memory is optimally used. This mode should always be
used when large and complicated stimulation patterns are used, for example white noise
stimulation.
The second option is to use the feature “Independent Channel Download” which is available
in the "Settings" menu. This feature allows downloading a new stimulation paradigm to
individual channels only, while all other channels continue with their former program without
stopping. To enable this, the memory space of the STG is divided among all available channels.
For example, when using a STG4008, the memory is divided in four parts, for two Sync Out
channels and two stimulation channels, so the memory space for each channel is more limited
than in default mode. If a stimulation pattern is too large for the available memory partition,
no download is possible.
Note: It is recommended to operate the STG in default mode. The “Independent Channel
Download” feature should only be used if one STG is connected to more than one recording
system, and if those recording systems should be operated independently.
8.1.2 Independent Channel Download
The "Independent Channel Download" can be activated in the "Settings" menu. As mentioned
above, it allows downloading of new paradigms to individual channels without also stopping all
other channels, but also leads to limited memory availability.
This feature is primarily intended to be used with MEA-Systems with multiple amplifiers and only
a single STG. Please see chapter "Operating multiple MEA Amplifiers with one STG".