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Chapter 5
Analog Output
©
National Instruments Corporation
5-9
Fig
u
re 5-6 shows the relationship of AO Sample Clock to AO Start Trigger.
Figure 5-6.
AO Sample Clock and AO Start Trigger
AO Sample Clock Timebase Signal
The AO Sample Clock Timebase (ao/SampleClockTimebase) signal is
divided down to provide a so
u
rce for AO Sample Clock.
Yo
u
can ro
u
te any of the following signals to be the AO Sample Clock
Timebase signal:
•
20 MHz Timebase
•
100 kHz Timebase
•
(USB-6211/6215 Devices)
PFI <0..3>
•
(USB-6212/6216 Devices)
PFI <0..15>
•
(USB-6218 Devices)
PFI <0..3>, PFI <8..11>
AO Sample Clock Timebase is not available as an o
u
tp
u
t on the
I/O connector.
Yo
u
might
u
se AO Sample Clock Timebase if yo
u
want to
u
se an external
sample clock signal, b
u
t need to divide the signal down. If yo
u
want to
u
se
an external sample clock signal, b
u
t do not need to divide the signal, then
yo
u
sho
u
ld
u
se AO Sample Clock rather than AO Sample Clock Timebase.
AO
Sa
mple Clock Time
bas
e
AO
S
t
a
rt Trigger
AO
Sa
mple Clock
Del
a
y
From
S
t
a
rt
Trigger