Chapter 5
Analog Output
©
National Instruments
5-11
X Series User Manual
A programmable internal co
u
nter divides down the AO Sample Clock
Timebase signal.
Several other internal signals can be ro
u
ted to AO Sample Clock thro
u
gh
internal ro
u
tes. Refer to
Device Routing in MAX
in the
NI-DAQmx Help
or
the
LabVIEW Help
for more information.
Using an External Source
Use one of the following external signals as the so
u
rce of AO Sample
Clock:
•
PFI <0..15>
•
RTSI <0..7>
•
PXI_STAR
•
PXIe-DSTAR<A,B>
•
Analog Comparison Event (an analog trigger)
Routing AO Sample Clock Signal to an Output
Terminal
Yo
u
can ro
u
te AO Sample Clock (as an active low signal) o
u
t to any
PFI <0..15>, RTSI <0..7>, or PXIe-DSTARC terminal.
Other Timing Requirements
The AO timing engine on yo
u
r device internally generates AO Sample
Clock
u
nless yo
u
select some external so
u
rce. AO Start Trigger starts the
timing engine and either the software or hardware can stop it once a finite
generation completes. When
u
sing the AO timing engine, yo
u
also can
specify a config
u
rable delay from AO Start Trigger to the first AO Sample
Clock p
u
lse. By defa
u
lt, this delay is two ticks of AO Sample Clock
Timebase.
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