9 Acquisition and Storage
9.1
Introduction
Data acquisition hardware within the GEN3i is based on the concept of a
recorder
. A recorder consists of a number of acquisition
channels
that share
the same basic recording parameters: sample rate, sweep length and pre
-
and
post
-
trigger length. Usually, a single recorder is physically identical to a single
acquisition card. Multiple recorders can be placed in a single
mainframe
. The
mainframe is the housing for the recorders. The mainframe provides the power
and includes the interface for the local area network. A mainframe has its own
network address (IP address).
For the sake of simplicity, we will consider a single channel in this section.
SigCon / Amp
ADC
RAM
Trigger
Detector
Acquisition
Logic
internal high sp
e
ed dat
a bu
s
Downsampler
Figure 9.1:
Simplified generic single channel data acquisition system
In the GEN3i data acquisition system and the Perception software that goes
with it, a separation is made between acquisition and storage.
Acquisition
is
the act of digitizing analog data and making it available for monitoring or
storage.
Storage
is the actual archiving of digitized data.
Recording
(verb) is
acqui storage.
GEN3i
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