National Instruments 6368 User Manual

© National Instruments | 7-9
X Series User Manual
Figure 7-9 shows an example of an implicit buffered pulse measurement.
Figure 7-9. Implicit Buffered Pulse Measurement
Sample Clocked Buffered Pulse Measurement
A sample clocked buffered pulse measurement is similar to single pulse measurement, but a
buffered pulse measurement takes measurements over multiple pulses correlated to a sample
clock.
The counter performs a pulse measurement on the Gate. On each sample clock edge, the counter
stores the high and low ticks in the FIFO of the last pulse to complete. A DMA controller
transfers the stored values to host memory.
Figure 7-10 shows an example of a sample clocked buffered pulse measurement.
Figure 7-10. Sample Clocked Buffered Pulse Measurement
Hardware-Timed Single Point Pulse Measurement
A hardware-timed single point (HWTSP) pulse measurement has the same behavior as a sample
clocked buffered pulse measurement.
Note If a pulse does not occur between sample clocks, an overrun error occurs.
Note (NI USB-634
x/635x/636x Devices) USB X Series devices do not support
hardware-timed single point (HWTSP) operations.
Gate
Source
HL
42
HL
4
2
44
6
2
2
2
H L
4
2
4
4
6
2
HL
42
4
4
Buffer
Counter Armed
Co
unter
Armed
Gate
Source
HL
2
2
HL
22
3
3
Sample
Clock
S1
S2
Buffer
22 33

National Instruments 6368 Specifications

General

Brand	National Instruments
Model	6368
Category	Data Loggers
Language	English