Appendix A Specifications
NI PCI-5911 User Manual A-6 ni.com
Clock jitter..............................................<75 pSrms, independent of 
reference clock source
Clock compatibility................................TTL for both input and output
Sampling clock frequencies
Conventional mode.......................100/nMHz, where 1 ≤n≤224
Flexible resolution mode.................12.5 MHz, 5 MHz, 2.5 MHz, 
1 MHz, 500 kHz, 200 kHz, 
100 kHz, 50 kHz, 20 kHz, 10 kHz
Reference clock sources.........................PFI lines, RTSI clock, or onboard
Triggering SystemsModes.....................................................Edge, hysteresis, window, digital
Source.....................................................CH0, RTSI<0..6>, PFI 1, 2
Slope.......................................................Rising/falling
Hysteresis................................................Full-scale voltage/n, where n is 
between 1 and 170
Coupling.................................................AC/DC 
Pretrigger depth......................................Up to 4 MS or 16 MS, depending 
on memory option purchased and 
sampling mode
Posttrigger depth.....................................Up to 4 MS or 16 MS, depending 
on memory option purchased and 
sampling mode
Holdoff time...........................................5 µs to 171.79 s in increments 
of 40 ns
Trigger resolution...................................170 steps in full-scale voltage 
range