Chapter4 HardwareOverview
NI5102 User Manual 4-10 ni.com
Table4-5 describes the posttrigger acquisition signals.
Table4-5. PosttriggerAcquisition Signals
Signal Description
Start Trigger Triggersthe acquisition. It can be generated through software, or CH0,
CH1,TRIG, PFI1, and PFI2, or any of the seven RTSI bus trigger lines.
RTSIbus trigger lines are available only on the NI 5102 (PCI, PXI, ISA).
Scan Clock Causesthe ADC to convert the input signal into digital data. This signal is
alsoused in the memory controller to write the data into on boardmem ory.
Thissi gnal can be generated internally,with a 24-bit counter clocked with
a2 0 MHz signal to generate pulses from 20 MHz to 1.19 Hz. The 24-bit
counter providesa wide choice of valid frequencies for the Scan Clock
signal.In addition, Scan Clock can also be selected from CH0, CH1, TRIG,
PFI1,and PFI2, or any of the seven RTSI bus trigger lines. RTSIbus trigger
lines are availableonly on the NI 5102 (PCI, PX I, ISA).
End of Acquisition Indicatesend of acquisition to the control logic in the hardware. It is
generatedfrom a counter that keeps track of the number of points remaining
in the acquisition. It can be exported from the device on the PFI lines.