CMC 353 Reference Manual
26
4.2.1 Accuracy and Signal Quality
The CMC 353 is a very precise test set with excellent long-term and
temperature drift behavior.
To achieve this accuracy, the philosophy was not only to solve signal
generation digitally, but also to implement the distribution of signals to the
various modules using digital methods. In doing so, the goal of galvanic
separation of the individual generator groups was also achieved without loss
of accuracy.
In achieving the amplitude accuracy, the drift behavior (temperature and
long-term) is of major importance in the voltage references, the digital-
analog converters (DAC), the accurate voltage dividers in the voltage
amplifiers, and the current shunts in the current amplifiers.
The actual (typical) data is in general about a factor of 3 better than the
guaranteed data.
The associated exact measurement media are required for the assurance of
the accuracy in the production. The measurement media used by
OMICRON are regularly calibrated by an accredited calibration institute so
that tracing to international standards can be assured.
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