Keithley 2601B Reference Manual page 149

Section 3: Functions and features
Buffer read-only attributes
The following table contains buffer read-only attributes.
Buffer read-only attributes: Read-only attributes used to access buffer parameters
Storage attribute
basetimestamp
capacity
n
next
Buffer storage control programming examples
The programming examples below illustrate the use of buffer storage control attributes.
Buffer control programming examples:
Command
smua.nvbuffer1.collectsourcevalues = 1
smua.nvbuffer1.appendmode = 1
smua.nvbuffer1.collecttimestamps = 0
smua.nvbuffer1.timestampresolution =
0.001
smua.nvbuffer1.fillcount = 50
smua.nvbuffer1.fillmode = 0
Buffer read-only attribute programming examples
The follow programming examples illustrate use of buffer read-only attributes.
Buffer read-only attribute programming examples:
Command
number = smua.nvbuffer1.n
buffer_size = smua.nvbuffer1.capacity
3-14
Series 2600B System SourceMeter® Instrument Reference Manual
Description
The timestamp of when the reading at rb[1] was stored, in seconds from
midnight January 1, 1970 GMT. See
additional details.
The total number of readings that can be stored in the reading buffer.
The number of readings in the reading buffer.
This attribute indicates where the next element that will be added to the reading
buffer will be stored.
Time and date values (on page 7-3) for
Description
Enable source value storage.
Enable buffer append mode.
Disable timestamp storage.
Set timestamp resolution to 0.001024 s.
Set 50 as the number of readings the
buffer will take before restarting at index
1.
Set the reading buffer to fill once (do
not overwrite old data).
Description
Request the number of readings in the
buffer.
Request buffer size.
2600BS-901-01 Rev. B / May 2013