Glossary
G-6
ni.com
PXI
PCI eXtensions for Instrumentation. PXI is an implementation of
CompactPCI with added electrical features that meet the high performance
requirements of instrumentation applications by providing triggering, local
buses, and system clock capabilities.
PXI_CLK10
10 MHz PXI system reference clock.
R
RMS
Root mean square.
S
s
Seconds.
skew
Deviation in signal transmission times.
slot blocker
An assembly installed into an empty slot to improve the airflow in adjacent
slots.
standby
The backplane is unpowered (off), but the chassis is still connected to
AC power mains.
star trigger slot
This slot is located at Slot 2 and has a dedicated trigger line between each
peripheral slot. Use this slot for a module with star trigger functionality that
can provide individual triggers to all other peripherals.
system reference
clock
A 10 MHz clock, also called PXI_CLK10, that is distributed to all
peripheral slots in the chassis. The system reference clock is used for
synchronization of multiple modules in a measurement or control system.
The PXI backplane specification defines implementation guidelines for
PXI_CLK10.
T
task
In NI-DAQmx, a collection of one or more virtual channels with timing,
triggering, and other properties.
TTL
Transistor-transistor logic.