What Is A Configuration Point; What Settings Are Stored In A Configuration List - Keithley 2450 Reference Manual

Model 2450 Interactive SourceMeter® Instrument Reference Manual

What is a configuration point?

A configuration point contains a copy of all instrument source or measure active settings at a specific
point in time. You store configuration points in a specific configuration list. Only the amount of
available memory limits the number of configuration points that you can store in a configuration list.
Lists can typically exceed 100,000 points.
Each configuration point is identified by an index. To overwrite an existing point, you can provide the
index when you store the configuration point. Otherwise, the instrument appends the configuration
point to the end of the list. Configuration points are chronologically numbered with the index starting
from 1.
The first time you create a configuration point and store into it, the instrument stores the active
settings to configuration point 1. Each time you store another set of active settings to the same list,
the instrument creates a new configuration point and appends it to the list using the next
chronological index.
You can use the index to identify a specific configuration point and perform operations on it when
necessary.
Although you can specify a specific configuration point index when you store active settings to a
configuration list, this is only necessary if you wish to overwrite an existing point. Normally, you can
build up the configuration points in a configuration list by appending (no index specified) subsequent
configuration points to the list.
If you only store one configuration point to a list, the list will consist of configuration point 1.

What settings are stored in a configuration list?

Specific instrument settings are stored in each type of configuration list. The same settings are
recalled to overwrite the active state when you recall a configuration list.
The first time you use the front panel or remote commands to store a configuration list, the instrument
stores the active settings to configuration point 1. Each time you append a configuration point to the
configuration list, the instrument saves the active values for active settings to settings in a
configuration point.
When you recall a configuration point on the list, the instrument restores the settings to the values
that were stored. The recall operation overwrites the active settings with the stored settings.
It does not matter how many configuration points are on a configuration list, you can only recall one
configuration point at a time.
To see actual values for the settings saved to a configuration point refer to
contents
2450-901-01 Rev. B/September 2013
(on page 3-42).
Section 3: Functions and features
Viewing configuration list
3-35