National Instruments Network Device DAQ S - Manual (Page 57)

Chapter 5 Analog Output
© National Instruments Corporation 5-9 NI 6124/6154 User Manual
Figure 5-8 shows the timing requirements for the AO Sample Clock
Timebase signal.
Figure 5-8. AO Sample Clock Timebase Timing Requirements
The maximum allowed frequency is 20 MHz, with a minimum pulse width
of 10 ns high or low. There is no minimum frequency.
Unless you select an external source, either the 20MHzTimebase or
100kHzTimebase generates the AO Sample Clock Timebase signal.
AO Start Trigger Signal
You can use the AO Start Trigger signal (ao/StartTrigger) to initiate a
waveform generation. If you do not use triggers, you begin a generation
with a software command.
Using a Digital Source
To use AO Start Trigger, specify a source and an edge. The source can be
an external signal connected to any PFI or RTSI <0..6> pin. The source can
also be one of several internal signals on your DAQ device. Refer to Device
Routing in MAX in the NI-DAQmx Help or the LabVIEW Help in
version 8.0 or later for more information.
t
p
= 50 ns minimum
t
w
= 23 ns minimum
t
w
t
w
t
p