Crystal Instruments Coco-80 - Preprogrammed CSA Project Descriptions

CoCo-80 User Manual
85
The signal analyzer phase includes the Acquisition Mode and CSA based block-
by-block processing. The acquisition mode controls how the continuous time
streams are captured into fixed-sized blocks. The processing phase applies
algorithms such as spectral analysis to the blocks.
Figure 100 shows how the input data is processed in the data conditioning and
signal analyzer phases.
Storage
memory
Rec./Stop
Save
Acquisition
Mode
Re-Start
Signal Analyzer Phase (FFT,
Transient Capture, Octave
Analysis, Run-Up Run-Down
Testing, Balancing)
Data Conditioning and
Recording Phase
Block-by-
Block
time
signals
Time
Capture
and
Spectral
Analysis
CSA
based
block-by-
block
processing
Data
Conditioning
CSA-based
time stream
processing
Time
streams
(cond’ed)
Native
Channels
Time
streams
Block-by-
Block time
and
frequency
signals
Figure 100. Data Process Flow Diagram.
The system has two dedicated buttons that control the data acquisition.
Rec./Stop button only applies to the continuous time streams in the data
conditioning phase while the Save button only applies to the captured time buffer
and spectral signals in the signal analyzer phase. Recording and Save cannot be
performed at the same time. In the other words, when the time stream is being
recorded, the spectral analysis cannot be saved. To save a spectral analysis signal
the time recording must first be stopped.
Re-Start soft button re-initializes the data conditioning, acquisition mode
control and spectral analysis. It resets the timer of time streams, re-arm the
trigger and reset the average number of spectral analysis.