CoCo-80 User Manual
141
streams are named by the function that generated them followed by the source
time stream signal in parenthesis. The types of signals include:
CHn: the native time stream signal of the nth input channel
BLOCK(sig): the block signal acquired from the time stream sig
APS(x): the Auto Power Spectrum of time stream x
CPS(y,x): the Cross Power Spectrum of excitation x and response y
COH(y,x): the coherence function of the excitation x and response y
FRF(y,x): the FRF of excitation x and response y
Signals enabled as Display Candidates will be selectable for display on the CoCo,
and signals enabled as Save Candidates will be selectable for block data saving.
Disabling some signals for Save and Display ability will simplify the interface on
the CoCo.
For FRF and CPS, one signal must be selected as the excitation channel. The other
channels become the response channels. The FRF, CPS, and COH functions are
available for the response channels with the excitation channel as the reference.
Editing an Arbitrary Waveform
The CoCo output channel can generate an arbitrary waveform from a file which
can be programmed in the EDM software and uploaded to the CoCo.
To open the Arbitrary Waveform Editor in EDM, right click on “Arbitrary
Waveform Files”.
To draw a waveform by hand, click and hold the mouse button then draw the
desired Arbitrary waveform on the top half of the window.
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