Chapter 4
Arb Operation
DAQArb 5411 User Manual
4-28
©
National Instruments Corporation
The SYNC output generated on the DAQArb 5411 can be routed to
other boards through any of the RTSI bus trigger lines.You can use this
signal to provide other boards with an accurate and fine frequency
resolution clock.
Note:
Refer to your software manual for selecting and routing signals to the
RTSI bus.
Calibration
Calibration is the process of minimizing measurement errors by making
small circuit adjustments. On the DAQArb 5411, NI-DAQ
automatically makes these adjustments by retrieving predetermined
constants from the onboard EEPROM, calculating correction values,
and writing those values to the CalDACs.
All DAQArb 5411 devices are factory calibrated to the levels indicated
in Appendix A, Specifications. Factory calibration involves procedures
such as nulling the offset and gain errors, all at room temperature
(25
o
C). The calibration constants are stored in a write-protected area in
the EEPROM. Factory calibration may not be sufficient for some
applications where different environmental conditions and aging could
induce inaccuracy. Contact National Instruments to recalibrate your
DAQArb 5411.
