National Instruments NI 6225 User Manual

Appendix B Timing Diagrams
M Series User Manual B-8 ni.com
Convert Clock
Convert Clock is the signal that determines when an analog to digital
conversion is started. The signal going to the ADC is called p_AI_Convert.
Convert Clock also can be routed to several external I/O terminals for
external use. Convert Clock is always generated from the Convert Clock
Timebase signal, either directly or indirectly (by dividing it down using the
SI2 counter). If the SI2 counter is used, it is assumed that a reliable
free-running clock is being used. Refer to the AI Timing Clocks section for
the timing relationship between Convert Clock Timebase and Sync Convert
Clock Timebase. If the SI2 counter is not being used (external convert
case), the Convert Clock Timebase is assumed to be not free-running and
the relationship between the Convert Clock Timebase and the Sync Convert
Clock Timebase is an asynchronous delay.
Whether the SI2 counter is used or not, the timing parameters in the
generation of Convert Clock are the same starting at the Convert Clock
Timebase signal.
Figure B-6. Convert Clock and the Analog Input Timing Engine
Start
Terminal
Selected Reference Trigger
Reference Trigger
Te r m in al
Terminal
Selected Sample Clock
Te r m in al
Terminal
Te r m in al
Selected Start
RTSI
Te r m in al
Terminal
Terminal
Selected Pause Trigger
SI
Counter
Block
SI2
Counter
Block
SI_TC
Sample Clock Timebase
Sync Sample Clock Timebase
Convert Clock Timebase
Sync Convert Clock Timebase
SI Start
Pause Trigger
p_AI_Convert
Start
1
SI2_TC

National Instruments NI 6225 Specifications

General

Brand	National Instruments
Model	NI 6225
Category	Media Converter
Language	English