NI cDAQ-9178 - General-Purpose Counter;Timers

NI cDAQ-9178/9174 User Guide and Specifications 68 ni.com
Digital input sample clock frequency
Streaming to application memory..................System-dependent
Finite ..............................................................0 to 10 MHz
Digital output sample clock frequency
Streaming from application memory .............System-dependent
Regeneration from FIFO................................0 to 10 MHz
Finite ..............................................................0 to 10 MHz
Digital output or digital input
sample clock source ...............................................Any PFI, analog sample or convert clock,
analog output sample clock, Ctr n Internal Output,
and many other sources
General-Purpose Counter/Timers
Number of counter/timers......................................4
Resolution ..............................................................32 bits
Counter measurements...........................................Edge counting, pulse, semi-period, period,
two-edge separation, pulse width
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.......................................................................Dedicated 127-sample FIFO
Frequency Generator
Number of channels ...............................................1
Base clocks ............................................................10 MHz, 20 MHz, 100 kHz
Divisors ..................................................................1 to 16 (integers)
Base clock accuracy...............................................50 ppm
Output is available on any PFI terminal.