ETAS 4 Calculated Signals
i. Rate: Define the rate in which a new sample of the calculated
signal shall be created.
Combined Raster (Merge Raster) (by default): For every
new sample of any input signal, a new sample for the cal-
culated signal is created. This means, different input signal
time rasters are merged.
Fixed: The calculation of a new sample is done in a periodic
raster independently from the rasters of the input signals.
Same as Signal: The calculated signal has the same
timestamps as the selected input signal. You can only
select available input signals. Thus, for example, if the selec-
ted input signal has been removed from the configuration, an
error message is displayed.
ii. Type: Select the data type of the calculated signal. A time offset
is applied to the result of calculation only. It can be a negative or
positive value with up to 6 decimals. A time offset allows to
shift individual signals and thus synchronizes their time line
with other signals from the same measure file.
Automatic (by default): The program tries to detect whether
the result is a logical (Boolean) signal or not.
Boolean
Double
iii. Time Offset for the calculated signal.
7. Click Save.
If the calculation is not valid, you cannot save the calculated signal.
An error message is displayed and the exact location of the error is
highlighted. After saving, the new calculated signal is available in
the Variable Explorer and in the calculated signal list.
8. To use the calculated signal, drag and drop it onto an instrument.
For calculated signals, a square root symbol is shown as file iden-
tifier.
Note
The copy and paste function is currently not supported in the Formula Defin-
ition field.
4.2 Managing Calculated Signals
For a general overview of the window, see "Calculated Signals" on page52. You
can perform the following actions:
MDA V8.5 - User Guide 55
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