National Instruments Eight-slot USB Chassis NI cDAQ-9172 - Manual (Page 79)

© National Instruments Corporation 79 NI cDAQ-9172 User Guide and Specifications
Debounce filter settings ......................... Selectable per input:
125 ns, 6.425 µs, 2.56 ms, disable,
high and low transitions
Timing input frequency.......................... 0 to 20 MHz
Timing output frequency........................ 0 to 20 MHz
General-Purpose Counter/Timers (Slots 5 and 6 Only) 1
Number of counter/timers ...................... 2
Resolution .............................................. 32 bits
Counter measurements ........................... Edge counting, pulse,
semi-period, period,
two-edge separation
Position measurements........................... X1, X2, X4 quadrature encoding
with Channel Z reloading;
two-pulse encoding
Output applications ................................ Pulse, pulse train with dynamic
updates, frequency division,
equivalent time sampling
Internal base clocks ................................ 80 MHz, 20 MHz, 100 kHz
External base clock frequency ............... 0 to 20 MHz
Base clock accuracy ............................... 50 ppm
Output frequency.................................... 0 to 20 MHz
Inputs...................................................... Gate, Source, HW_Arm, Aux,
A, B, Z, Up_Down
Routing options for inputs...................... Any PFI, analog trigger,
many internal signals
FIFO ....................................................... 2 samples
Data transfers ......................................... High-speed data stream,
programmed I/O
1 Requires correlated digital I/O modules installed in the appropriate slot(s).