19-126 Return to Section Topics 2600AS-901-01 Rev. B / September 2008
Section 19: Remote Commands Series 2600A System SourceMeter® Instruments Reference Manual
smuX.nvbufferY.basetimestamp
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
Attribute Timestamp of when the first reading was stored.
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
Usage basetime = smuX.nvbufferY.basetimestamp
basetime The timestamp of the first stored reading.
Remarks • Reading this attribute returns the timestamp (in seconds) for the first reading (rb[1]) stored in a
buffer. The timestamp is the number of seconds since 12:00am January 1, 1970 (UTC) that the
measurement was performed and stored.
• This is a read-only attribute.
Details See Reading buffers in this section and in Section 7.
Also see smuX.measure.overlappedY, smuX.measure.Y, smuX.nvbufferY
Example Read the timestamp for the first reading stored in Buffer 1 of SMU A:
basetime = smua.nvbuffer1.basetimestamp
print(basetime)
Output: 1.2143e+09
The above output indicates that the timestamp is 1,214,300,000 seconds.
smuX.nvbufferY.capacity
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
Attribute Capacity of the buffer.
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
Usage capacity = smuX.nvbufferY.capacity
capacity The maximum number of readings the buffer can store.
Remarks • Reading this attribute returns the number of readings that can be stored in the buffer.
• A buffer with only basic collection items turned on can store over 140,000 readings. Capacity
does not change as readings fill the buffer. Turning on additional collection items, such as
timestamps and source values, decreases the capacity of the buffer.
• This is a read-only attribute.
Details See Reading buffers in this section and in Section 7.
Also see smuX.measure.overlappedY, smuX.measure.Y, smuX.nvbufferY
Example Read the capacity of SMU A Buffer 1:
capacity = smua.nvbuffer1.capacity
print(capacity)
Output: 1.49789e+05
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