Gage CS1220 Donanım Kılavuzu - Sayfa 16
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Sayfayı YazdırCompuScope 1220 throughput & maximum PRF
A number of applications require the CompuScope 1220 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, 1 GHz processor
•
512 MB RAM
•
20 GB disk drive
•
Windows 2000
•
NT File System
•
33 MHz, 32 bit PCI 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 CS1220 was operated using this application for many different capture depths and the
results are plotted as points in the graph below. The PCI transfer rate was calculated from the linear portion of
the curve at high depths.
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PCI data transfer rate:
Figure 3: Maximum PRF vs. acquisition length
50 MB/s
CompuScope 1220