Chapter 2
NI 5450 Overview
NI PXIe-5450 User Manual
2-86
ni.com
Delay is applied to the event with respect to the analog output of the signal
generator. For example, a delay of 0 Sample clocks aligns the event with
the analog output signal, while a delay of +2 Sample clocks causes the
event to appear two Sample clock periods after the analog output appears.
All event delays are adjusted in increments of Sample clock periods,
regardless of the units used to set the delay. For example, if you provide a
value for delay with units of seconds, the delay is coerced up to the nearest
Sample clock period.
The event delay attributes must be set before waveform generation is
initiated. Any changes made to other attributes during waveform generation
may change the analog output delay. NI-FGEN does not compensate for
this change in the analog output delay, and continues to apply the event
delay that you was originally configured.
If an event delay is applied to an event that is being exported to multiple
output terminals, NI-FGEN aligns the event on the first terminal you
specified.
You can configure event delays by calling the Started Event Delay property
or the
NIFGEN_ATTR_STARTED_EVENT_DELAY
attribute, or the Done
Event Delay property or the
NIFGEN_ATTR_DONE_EVENT_DELAY
attribute.
Exporting Signals
The signal generator contains seven PXI trigger lines that are available for
sending signal generator-specific information to other devices that have
PXI trigger or RTSI bus connectors.
The signal generator has connectors on the front panel to route signals to
devices external to the PXI Express chassis. The following table shows the
signals available for export and the lines they can be routed to. To determine
all possible signal routes for your device, refer to Signal Routing.
Note
The PFI outputs have a bandwidth of 200 MHz. The PXI Trigger lines have a
bandwidth of <50 MHz.
