Keithley 2651A Reference Manual

Section 7: Command reference Model 2651A High Power System SourceMeter® Instrument Reference Manual
7-22 2651A-901-01 Rev. A / March 2011
Usage
state = bufferVar.collecttimestamps
bufferVar.collecttimestamps = state
state
Timestamp value collection status; set to one of the following:
• 0: Timestamp value collection disabled (off)
• 1: Timestamp value collection enabled (on)
bufferVar
The reading buffer; this can be a dynamically allocated buffer (user defined), or a
dedicated reading buffer (such as smua.nvbuffer1)
Details
Assigning a value to this attribute enables or disables the storage of timestamps. Reading this attribute returns
the state of timestamp collection. This value can only be changed with an empty buffer. Empty the buffer using
the bufferVar.clear() function.
When on, timestamp values will be stored with readings in the buffer. This requires four extra bytes of storage
per reading. Turning on additional collection items, such as timestamps (this attribute) and source values,
decreases the capacity of a dedicated reading buffer (for example, smua.nvbuffer1), but does not change the
capacity of a user-defined dynamically allocated buffer.
This value, off or on, can only be changed when the buffer is empty. Empty the buffer using the
bufferVar.clear() function.
Example
smua.nvbuffer1.collecttimestamps = 1
Include timestamps with readings for
dedicated reading buffer 1.
Also see
bufferVar.clear() (on page 7-19)
smuX.measure.overlappedY()
(on page 7-201)
smuX.measure.Y()
(on page 7-205)
smuX.nvbufferY
(on page 7-208)
smuX.trigger.measure.Y()
(on page 7-238)
Reading buffers
(on page 3-6)
bufferVar.fillcount
This attribute sets the reading buffer fill count.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Not applicable Not applicable 0
Usage
fillCount = bufferVar.fillcount
bufferVar.fillcount = fillCount
fillCount
The reading buffer fill count
bufferVar
The reading buffer; can be a dynamically allocated buffer (user-defined), or a
dedicated reading buffer (such as smua.nvbuffer1)

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English