Keithley 2601 Reference Manual page 328

Section 12: Instrument Control Library
Include source values with readings for SMU A buffer 1:
Example
smua.nvbuffer1.collectsourcevalues = 1
smuX.nvbufferY.collecttimestamps
Attribute Timestamp collection for the buffer.
Usage state = smuX.nvbufferY.collecttimestamps
smuX.nvbufferY.collecttimestamps = state
Set
state
0 Timestamp collection disabled (off).
1 Timestamp collection enabled (on).
Remarks • Assigning a state value to this attribute enables or disables the storage of timestamps.
Reading this attribute returns the state of timestamp collection.
• When on, timestamps will be stored with readings in the buffer. This requires four extra
bytes of storage per reading. The first reading is time stamped at zero seconds.
Subsequent readings are time stamped relative to the time storage was started.
• This value, off or on, can only be changed when the buffer is empty. The buffer can be
emptied using the
Details See "Reading
Also see smuX.measure.overlappedY, smuX.measure.Y,
Include timestamps with readings for SMU A buffer 1:
Example
smua.nvbuffer1.collecttimestamps = 1
smuX.nvbufferY.n
Attribute Number of readings in the buffer.
Usage
bufferreadings = smuX.nvbufferY.n
Remarks • Reading this attribute returns the number of readings that are stored in the buffer.
• This is a read-only attribute.
Details See "Reading
Also see smuX.measure.overlappedY, smuX.measure.Y,
Example Read the number of readings stored in SMU A buffer 1:
bufferreadings = smua.nvbuffer1.n
print(bufferreadings)
Output:
1.250000+02
The above output indicates that there are 125 readings stored in the buffer.
smuX.nvbufferY.timestampresolution
Attribute Timestamp resolution.
Usage tsres = smuX.nvbufferY.timestampresolution
smuX.nvbufferY.timestampresolution = tsres
tsres
Remarks • Assigning to this attribute sets the resolution for the timestamps. Reading this attribute
returns the timestamp resolution value.
• The minimum timestamp resolution is 0.000001seconds (1µs). At this resolution, the
reading buffer can store unique timestamps for up to 71 minutes. This value can be
increased for very long tests.
• When setting this value it will be rounded to an even power of 2µs.
Details See "Reading
Also see smuX.measure.overlappedY, smuX.measure.Y,
Set the timestamp resolution for SMU A buffer 1 to 10µs:
Example
smua.nvbuffer1.timestampresolution = 0.00001
12-68
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
to one of the following values:
smuX.nvbufferY.clear
buffers" in this section and in
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
buffers" in this section and in
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
Timestamp resolution in seconds.
buffers" in this section and in
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Series 2600 System SourceMeter® Instruments Reference Manual
-- Reads collection state.
-- Writes collection state.
function.
Section 7.
smuX.nvbufferY
Section 7.
smuX.nvbufferY
-- Reads collection state.
-- Writes collection state.
Section 7.
smuX.nvbufferY
2600S-901-01 Rev. C / January 2008