Configuration Aspects for Programmers Appendix C
C-10 NetScan User’s Manual
The I command is used to set these two scan intervals. For example, the following command:
I00:00:10.0,00:00:00.1
would set the scan interval to once every 10 seconds and set the post-trigger scan interval to once every 0.1
seconds. As mentioned earlier, the scan interval can be set to run as fast as the current configuration will allow.
This is referred to as fast mode. Each of the two scan intervals can be configured as such by specifying
00:00:00.0 as the argument for the I command for the desired timebase interval. For example, the following
command:
I00:00:10.0,00:00:00.0
will set the normal scan interval to once every 10 seconds and the acquisition scan interval will be set to fast
mode. The two scan intervals may be queried any time via the I? software command.
Acquisition Configuration
Introduction
To collect and buffer scans, it is necessary to configure an acquisition. An acquisition can consist of the
following components:
Component Description Required
Pre-Trigger Scans taken before the Trigger is satisfied No
Post-Trigger Scans taken between the Trigger and the Stop event Yes*
Post-Stop Scans taken after the Stop event No
* However, if the Post-Trigger is set to 0, the Trigger scan is collected (1 scan) but no
Post-Stop scans are collected.
These components constitute a single Trigger Block in the internal memory. Every Trigger Block has one and
only one Trigger point. This figure describes a Trigger Block.
Scans & Scan Intervals
Scans Composing a Single Acquisition Trigger Block