Keithley 6430 - Buffer Considerations

5-28 Source-Measure Concepts
Buffer considerations
When the SourceMeter is in the process of storing readings, configuration changes affect
what gets stored in the buffer. These storage considerations and restrictions are summarized in
Table 5-3.
The first column of Table 5-3 shows the SourceMeter configuration when the storage pro-
cess is started. The next three columns show what happens when configuration changes are
made while the SourceMeter is storing readings.
Changing V, I, or Ω measurement function
• If you started with only a basic measurement function selected, the buffer will track a
basic measurement function change. For example, if you started in volts and changed to
current, the buffer will store the current readings.
• If you started with MATH, REL, and/or LIMITS enabled, the buffer will stop storing
readings if you change the basic measurement function. Storage will continue if you
return to the original configuration.
See Section 3, Basic source-measure procedure, for more information on selecting the mea-
surement function.
Table 5-3
Buffer considerations
Configuration at start
of the storage process
What happens if
the basic measure-
ment function (V, I,
or W) is changed
What happens if
the MATH func-
tion is changed
What happens if
REL or LIMITS is
changed
Measure V, I, or Ω
MATH (FCTN) enabled
REL/LIMITS enabled
Buffer tracks
Buffer pauses
Buffer pauses
V, I, or Ω stored
MATH not stored
OK
Buffer pauses
V, I, or Ω stored REL
or Limits not stored
MATH stored REL or
Limits not stored
OK