
Appendix A Specifications
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National Instruments Corporation A-3 NI 5401 User Manual
Waveform Specifications
Memory..................................................16,384 16-bit samples
Segment length....................................... 16,384 samples, exact
Segment linking (instruction FIFO)....... 512 links
Timing I/O
Update clock .......................................... Internal, 40 MHz only
Frequency locking
External reference sources..............Input connector, RTSI clock line,
or internal
Reference clock frequencies ........... 1 MHz, 5–20 MHz in 1 MHz steps
Frequency locking range.................±100 ppm
Triggers
Digital Trigger
Compatibility ........................................ TTL
Response ............................................... Rising edge
Pulse width (T
d1
).................................... 20 ns min
Trigger to waveform
output delay (T
d2
)...................................28 sample clocks + 150 ns max
RTSI
Trigger lines .......................................... 7
Clock lines.............................................. 1
Bus Interface
Type ....................................................... Slave
Operational Modes
Type ....................................................... Single, continuous, stepped
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