ADLINK PXI-2022 - Manual (Page 9)

Introduction 1
1 Introduction
ADLINK's PXI-2020/2022 are simultaneous-sampling multi-func-
tion DAQ cards to meet a wide range of application requirements
for PXI systems. The devices can simultaneously sample 8/16 AI
channels with differential input configurations in order to achieve
maximum noise elimination. If more analog input channels are
required, multiple cards can be synchronized through the PXI Trig-
ger bus. The PXI-2020/2022 feature digital triggering, 4-CH pro-
grammable digital I/O lines, and 2-CH 32-bit general-purpose
timer/counter. The auto-calibration functions adjust the gain and
offset to be within specified accuracies such that you do not have
to adjust trim pots to calibrate the cards.
Flexible Triggering
The PXI-2020/2022 feature flexible triggering options such as a
software trigger, external digital trigger and triggers from the PXI
Star trigger and trigger bus. These versatile trigger sources allow
you to configure the PXI-2020/2022 to fit your application needs.
Post-trigger, delay-trigger, pre-trigger and middle-trigger modes
are also available to acquire data around the trigger event. The
PXI-2020/2022 also feature repeated trigger acquisition, so you
can acquire data in multiple segments with successive trigger
events at extremely short rearming intervals.
Multiple-Module Synchronization
The versatile trigger options provided by the PXI backplane allow
the PXI-2020/2022 to achieve multi-module synchronization in a
simplified way. Utilizing the PXI Trigger bus, the PXI-2020/2022
can output trigger signals and the timebase to the PXI trigger bus
when configured as a master, or receive trigger signals and the
timebase from the PXI trigger bus when configured as a slave.
Moreover, when the PXI-2020/2022 are plugged into a peripheral
slot of a PXI system, they can also receive triggers or the time-
base from the PXI Star trigger controller slot. The precision 10
MHz clock that comes from the PXI backplane can also be used
as one of the timebase sources. Combining these PXI trigger fea-
tures with the interface of the PXI-2020/2022 makes it very easy to
synchronize multiple modules.