Mx878 - HBM QuantumX MX840 Operating Manual

Functions and outputs 149
7.3

MX878

The MX878 module is a module with eight analog outputs that can be accessed on the front
panel via BNC sockets resp. plug terminals.
MX878
Fig. 7.3: MX878 front view
Two analog outputs each (1 and 2, 3 and 4, etc.) have the same ground potentials, for the
others electrical isolation applies between them and the voltage supply ground.
The modules can receive all signals that are isochronously available on the Firewire.
The settings for this are implemented with the QuantumX Assistant. Before output at the
analog output, the signal passes through an output characteristic curve parameterized by the
user (2 point scaling) and a filter also parameterized by the user. In addition, the rate for DAC
is reduced to 96 kS/s through interpolation.
MX878 Math channels
The MX878 is a dedicated module designed for analog output and math channels.
The MX878 supports 4 math channels and 4 peak detection channels.
In contrast to other modules, the MX878 has no analog sensor inputs − instead it receives
data from other modules via the so called "isochronous FireWire transfer" from any source
within the system configured for this data transfer mode. The module routes this data to an
analog output or performs a math computation on this data (which may also be output on
one of the analog outputs).
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