Gage CompuScope 14100C, Руководство по аппаратному обеспечению и инструкция по установке драйверов

Страница: 25 / 174

Multiple Record for CS14100C & CS1610C 19
Multiple Record for CompuScope 14100C and CompuScope 1610C
Please note: the CompuScope 85GC and CompuScope 3200C do not support Multiple Record.
See next page for details on Multiple Record for the CompuScope 82G.
Even though the CompactPCI bus allows very fast data throughput to system RAM, there may still be
applications in which data bursts cannot be off-loaded either because of very fast trigger repeat frequency or
because of software limitations.
Multiple Recording allows the CompuScope card to capture data on successive triggers and stack it in the on-
board memory.
It should be noted that only post-trigger data can be captured in Multiple Record mode.
GageScope software can display the stacked data as individual acquisitions. Software drivers also provide
support for accessing Multiple Record data.
Once the CompuScope card has finished capturing a Multiple Record segment, the trigger circuitry is
automatically re-armed within 16 sample clock cycles to start looking for the next trigger. No software
intervention is required.
Figure 14: Multiple Record mode
Multiple Recording is useful for applications in which a series of bursts of data have to be captured in quick
succession and there is not enough time to off-load the data to the system RAM.
Another situation in which Multiple Recording may be used is when data storage has to be optimized. These are
cases in which only certain portions of the incoming signal are of interest and data capture during the dead time
between successive portions is not useful.
Examples of these situations are radar pulses, ultrasound data, lightning pulses, imaging signals and explosion
testing.