Gage CompuScope 14100C, Hardware Manual And Driver Installation Manual

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106 CompuScope 82GC
CompuScope 82GC throughput & maximum PRF
A number of applications require the CompuScope 82GC to acquire data based on a rapidly occurring trigger
signal. These high Pulse Repeat Frequency (PRF) applications include imaging, radar, ultrasound and lightning
test.
Gage has performed extensive repetitive capture benchmarks in single record mode. In this mode, the signal is
captured into on-board CompuScope memory and the captured data are transferred through the PCI bus using
PCI bus mastering to PC RAM.
Please note that much higher PRFs will be achieved using CompuScope Multiple Record mode.
The following test results were obtained using a computer configured as follows:
•
Pentium III, 850 MHz processor
•
256 MB RAM
•
20 GB disk drive
•
Windows 98
•
33 MHz, 32 bit CompactPCI
TM
bus
•
All slots support bus mastering
A C application program optimized for fast repetitive capture in single record mode was used for throughput
measurements. The CS82GC was operated using this application in both single and dual channel mode for many
different capture depths and the results are plotted as points in the graph below. The PCI transfer rates were
calculated from the linear portion of the curves at high depths.
PCI data transfer rate (single channel): 80 MB/s
PCI data transfer rate (dual channel): 50 MB/s
Figure 67: Maximum PRF vs. acquisition length