Series 2600A System SourceMeter® Instruments Version 2.2.6

Series 2600A System SourceMeter® Instruments Version 2.2.6
Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139-1891
1-888-KEITHLEY
www.keithley.com
Series 2600A System SourceMeter® Instruments
Version 2.2.6 Firmware Release Notes
Contents
General Information .................................................................................................................................................... 3 Supported models ................................................................................................................................................... 3 Installation instructions ........................................................................................................................................... 3 Upgrade considerations for all Series 2600A models ............................................................................................ 3 Version 2.2.6 Release ................................................................................................................................................ 4 Overview ................................................................................................................................................................. 4 Enhancements ........................................................................................................................................................ 4 Noncritical fixes ....................................................................................................................................................... 4 Known issues .......................................................................................................................................................... 4 Version 2.2.5 Release .............................................................................................................................................. 11 Overview ............................................................................................................................................................... 11 Critical fixes........................................................................................................................................................... 11 Noncritical fixes ..................................................................................................................................................... 11 Version 2.2.4 Release .............................................................................................................................................. 14 Overview ............................................................................................................................................................... 14 Compatibility concerns.......................................................................................................................................... 14 Noncritical fixes ..................................................................................................................................................... 14 Enhancements ...................................................................................................................................................... 15 Version 2.2.3 Release .............................................................................................................................................. 17 Overview ............................................................................................................................................................... 17 Compatibility concerns.......................................................................................................................................... 17 Critical fixes........................................................................................................................................................... 17 Noncritical fixes ..................................................................................................................................................... 17 Version 2.2.2 Release .............................................................................................................................................. 19 Overview ............................................................................................................................................................... 19 Compatibility concerns.......................................................................................................................................... 19 Critical fixes........................................................................................................................................................... 19 Enhancements ...................................................................................................................................................... 19 Noncritical fixes ..................................................................................................................................................... 20 Version 2.2.1 Release .............................................................................................................................................. 24 Overview ............................................................................................................................................................... 24 Major enhancements ............................................................................................................................................ 24 Other enhancements ............................................................................................................................................ 24 Noncritical fixes ..................................................................................................................................................... 29 Version 2.1.6 Release .............................................................................................................................................. 59 Overview ............................................................................................................................................................... 59 Critical fixes........................................................................................................................................................... 59 Enhancements ...................................................................................................................................................... 59 Noncritical fixes ..................................................................................................................................................... 59 Version 2.1.5 Release .............................................................................................................................................. 61 Overview ............................................................................................................................................................... 61 Critical fixes........................................................................................................................................................... 61 Enhancements ...................................................................................................................................................... 61 Noncritical fixes ..................................................................................................................................................... 61 Version 2.1.4 Release .............................................................................................................................................. 65 2600A-850S-FRP Rev.N / October 2015
1
General Information: Supported models
Series 2600A Firmware Release Notes
Overview ............................................................................................................................................................... 65 Enhancements ...................................................................................................................................................... 65 Noncritical fixes ..................................................................................................................................................... 66 Version 2.1.3 Release .............................................................................................................................................. 73 Overview ............................................................................................................................................................... 73 Compatibility concerns.......................................................................................................................................... 73 Noncritical fixes ..................................................................................................................................................... 73 Version 2.1.1 Release .............................................................................................................................................. 76 Overview ............................................................................................................................................................... 76 Enhancements ...................................................................................................................................................... 76 Noncritical fixes ..................................................................................................................................................... 76 2
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
General Information: Supported models
General Information
Supported models
CAUTION
Do not install this firmware on Series 2600 (Models 2601, 2602, 2611, 2612, 2635, 2636), Series
2600B (Models 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B), or Series
2650A (Models 2651A, 2657A) instruments.
This firmware is intended for use on the following Keithley Instruments product models:
2601A, 2602A,
2611A, 2612A,
2635A, 2636A
Installation instructions
For detailed firmware installation instructions, refer to the “Upgrading the firmware” topic in the “Maintenance”
section of the Series 2600A System SourceMeter® Instruments Reference Manual (document number: 2600AS901-01). This manual is available online at http://www.keithley.com/support. If you decide to upgrade the firmware
in your instrument, follow the instructions in the manual. Alternatively, you can arrange to have Keithley
Instruments upgrade your firmware at the factory by calling your local Keithley Instruments support office.
Upgrade considerations for all Series 2600A models
The following table lists the considerations that should be made when deciding whether to upgrade your Series
2600A instrument firmware to version 2.2.6.
1
2
Consideration for upgrade
From
versions
2.1.0
2.1.1
Recalibration required?
Backward compatibility concerns?
Requalification recommended?
Should you upgrade?
No
No
Yes1
Review2
From
versions
2.1.3
2.1.4
2.1.5
2.1.6
No
No
No
Review2
From
versions
2.2.1
2.2.2
From
version
2.2.3
2.2.4
2.2.5
No
No
No
Yes
No
No
No
Review2
This release introduces fixes that affect range change delays and can affect tests that are sensitive to settling delays. See
the “Compatibility concerns” section for more information.
Review the entire list of changes made in all firmware versions between your current version and version 2.2.6. Upgrade if
any of the fixes or enhancements are needed.
2600A-850S-FRP Rev.N / October 2015
3
Version 2.2.6 Release: Overview
Series 2600A Firmware Release Notes
Version 2.2.6 Release
Overview
Version 2.2.6 is a maintenance release of the Series 2600A firmware. This release adds one enhancement and
fixes one noncritical issue.
Enhancements
PR56231 Models affected:
PR46007
2611A, 2612A, 2635A, 2636A
Enhancement:
Bit 10 of the status.questionable register now functions as the HIGHV_NOT_READY bit. When
this bit is set, it indicates that either the interlock is not engaged, or that the interlock was engaged
recently and the high voltage supply is still stabilizing. If the interlock is engaged and this bit is set,
attempting to turn on the output on the 200 V range will result in error code 5052, "Interlock engaged;
system stabilizing.”
Noncritical fixes
PR48900 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
With open leads, rapidly executed contact check measurements erroneously return a reading of 0
ohms, instead of the expected reading of 9.91E+37.
Resolution:
This issue has been corrected.
Known issues
The Series 2600A has been superseded by the Series 2600B. Maintenance support for the Series 2600A is
limited. Although these known issues will not be addressed on the Series 2600A, most of them have been or will
be addressed on the Series 2600B.
PR36756 Models affected:
PR37143
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The tspnet.tsp.rbtablecopy() function may return erratic results or make the instrument
unresponsive.
PR36955 Models affected:
PR45600
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument may generate a fatal error when under heavy LAN packet load. A known situation that
causes this is using TSP-Net to send a large number of messages to a remote instrument.
4
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.6 Release: Known issues
PR38791 Models affected:
PR38792
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument may fail to operate correctly after an “Out of memory” error. The instrument may ignore
commands sent over the command interfaces and may ignore front panel operations.
Workaround:
To avoid out-of-memory issues, you should leave 1 MB of dynamic memory available for instrument
use. The meminfo() function can be used to monitor the actual free memory remaining. When the
free memory drops below 1000 KB, the instrument may encounter an “Out of memory” error. The
Series 2600A System SourceMeter Instruments Reference Manual explains how to determine the
amount of memory needed for reading buffers and sweeps.
PR38794 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
In prompting mode, if a tsplink.reset() command initiated from another command interface is
executing when an abort message is received, a prompt for the abort message may not be generated.
The instrument will abort properly even though the prompt is not generated.
PR38795 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Aborting a tsplink.reset() command or aborting a script executing a tsplink.reset()
command may take a long time because the tsplink.reset() command is allowed to complete
before execution is aborted. The tsplink.reset() command may take several seconds when a
large number of nodes are connected together.
PR38800 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument may incorrectly generate an “Out of memory” error when allocating a reading buffer.
When there is insufficient memory to allocate the reading buffer, the garbage collector should
automatically run to reclaim any unused memory before generating the “Out of memory” error. The
garbage collector often fails to run, and an “Out of memory” error is issued.
Workaround:
To work around this issue, call the collectgarbage() function prior to creating a new reading
buffer.
2600A-850S-FRP Rev.N / October 2015
5
Version 2.2.6 Release: Known issues
Series 2600A Firmware Release Notes
PR39696 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Pressing the Recall Buffer button in the virtual front panel when TSP® Express is active will cause the
virtual front panel to generate a "Cannot open window:java.lan.Exception: Cannot read from
instrument" error.
PR39697 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP® Embedded does not generate any errors or warnings when TSP Express is active. The tool
appears to work but will not show any saved scripts, nor will it run new scripts.
PR40200 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Executing a tsplink.reset() while overlapped measurements are in progress causes the
instrument to become unresponsive.
PR40949 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using TSP-Net, time-outs may occur earlier than programmed. For example, with
tspnet.timeout set to 5 seconds, the tspnet.read() function may actually time out after only
4.7 seconds.
PR41548 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When loading a script using an invalid script name, the instrument loads the script as the anonymous
script and does not generate an error.
PR42183 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When nonprintable control codes are embedded in the text passed as parameters to display functions
such as display.settext(), the control codes cause the display to malfunction. Some of the
possible effects are:



6
The displayed text is corrupted.
The instrument beeps or buzzes.
The display shuts down and displays a "NO COMM LINK" message.
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.6 Release: Known issues
PR42533 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The tspnet.tsp.rbtablecopy() command generates an error 2413, "TSPnet invalid reading
buffer table," if the length of the name parameter exceeds 63 characters.
PR46154 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If trigger.timer[N].delay is set to a value less than 1 µs, the actual delay that results is
approximately 20 µs. Similarly, if digio.trigger[N].pulsewidth or
tsplink.trigger[N].pulsewidth is set to a value greater than zero but less than 1 µs, the
resulting trigger pulse is approximately 20 µs in width.
PR46306 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Performing a serial poll using the VXI-11 interface does not clear the status byte's RQS bit as
expected.
PR46376 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When sweeping on a fixed source range, the smuX.trigger.initiate() command fails with error
5005, "Value too big for range," if any source point exceeds the range value. For example, a 1.01 mA
source point on the 1 mA range. The command should execute without error as long as no source
point exceeds 1% beyond the range value.
PR46475 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If smuX.measure.autozero is set to smuX.AUTOZERO_AUTO, then executing
smuX.trigger.initiate() when smuX.trigger.measure.action is not equal to
smuX.DISABLE will cause smuX.measure.autozero to be set to smuX.AUTOZERO_OFF at the
conclusion of the resulting sweep.
PR46480 Models affected:
(A)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Sending a properly terminated message using the device_write() command causes errors -363,
"Input buffer overrun" and -420, "Query UNTERMINATED" when the "end" flag is not set.
2600A-850S-FRP Rev.N / October 2015
7
Version 2.2.6 Release: Known issues
Series 2600A Firmware Release Notes
PR46480 Models affected:
(B)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Performing a device_read() operation with an I/O timeout parameter value of zero causes the
instrument to reply immediately with an error code of 15 (I/O Timeout).
PR46584 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
After executing a sweep with source autoranging enabled, if the sweep leaves the SMU on a source
range higher than the one it started on, attempting to disable source autoranging using the
smuX.source.autorangeY attribute fails, generating error 5005 "Value too big for range." Disabling
source autoranging by setting the smuX.source.rangeY attribute succeeds as expected.
PR47512 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Rarely, the instrument boots very slowly, pausing for several minutes with two dots on the front panel
display, and requiring more than ten minutes total to complete its boot sequence. Afterward, certain
commands malfunction, each requiring more than 30 seconds to execute. These commands include:
trigger.timer[N].delay
trigger.timer[N].count
digio.trigger[N].pulsewidth
tsplink.trigger[N].pulsewidth
When the instrument is in this state, the functionality of any trigger timer, digital I/O, TSP-Link, or SMU
measurement operation cannot be relied upon. Turning the instrument off and then on again corrects
the issue.
PR47516 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If smuX.trigger.autoclear is set to 1, any source trigger that occurs less than 1 µs after the
Armed event will be ignored. As such, the source action will not proceed as expected if
smuX.trigger.source.stimulus is set to smuX.trigger.ARMED_EVENT_ID.
Workaround:
Use a timer to add 1 µs of delay between an Armed event and the source stimulus.
8
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.6 Release: Known issues
PR47518 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
After the smuX.sense attribute is changed from smuX.SENSE_CALA to either smuX.SENSE_LOCAL
or smuX.SENSE_REMOTE, the actual SMU output level cannot be raised above the programmed level
that immediately preceded the sense mode change. Turning the output off when
smuX.source.offmode is set to smuX.OUTPUT_HIGH_Z corrects the issue. Additionally, changing
the current source range often corrects the issue.
PR47521 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If the SMU output is turned off when smuX.source.offmode = smuX.OUTPUT_NORMAL and
smuX.source.offfunc = smuX.OUTPUT_DCVOLTS, the effective current limit does not correspond
to smuX.source.offlimiti as it should. When the output is in this state, setting
smuX.source.offlimiti or smuX.source.limiti corrects the issue.
PR47522 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The VXI-11 interface intermittently terminates response messages too early.
PR48894 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SMU output-off limits cannot be accessed from the front panel.
PR48899 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
With open leads, rapidly executed contact check measurements erroneously return 0 ohms, instead of
the expected 9.91E+37.
2600A-850S-FRP Rev.N / October 2015
9
Version 2.2.5 Release: Known issues
10
Series 2600A Firmware Release Notes
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.5 Release: Overview
Version 2.2.5 Release
Overview
Version 2.2.5 is a maintenance release of the Series 2600A firmware. This release resolves one critical and
several noncritical issues.
Critical fixes
PR47276 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
A voltage measurement triggered within 85 μs of a voltage measurement range change operation may
not meet the accuracy specifications of the instrument.
Resolution:
This issue has been corrected.
Noncritical fixes
PR50740 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When sourcing voltage and measuring current with measure autoranging enabled, if the current
flowing through the SMU terminals momentarily exceeds a setpoint of approximately 100 mA, the next
reading will occur on the 1 A range or greater, even if a smaller range would be more appropriate for
the signal. The autoranging routine resumes its expected behavior on the following reading.
Resolution:
This issue has been corrected.
PR50615 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
In the KIPulse factory script, the step size ratio b is calculated incorrectly in functions
ConfigPulseIMeasureVSweepLog and ConfigPulseVMeasureISweepLog.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
11
Version 2.2.5 Release: Noncritical fixes
Series 2600A Firmware Release Notes
PR51315 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Series 2600A web applications (Flash Upgrade, TSB Embedded, Virtual Front Panel, and TSP
Express) are blocked from running in Java version 7 update 51 because the JAR file manifest does
not contain the Permissions attribute.
Resolution:
This issue has been corrected.
PR51340 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Series 2600A web applications do not work in Internet Explorer 11. Running any of these web
applications brings users to a Keithley support login website.
Resolution:
This issue has been corrected.
PR51344 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When running a Series 2600A web application, a Java security prompt may ask for your confirmation
for running the application. An incorrect application name is shown on the security dialog box.
Resolution:
This issue has been corrected.
PR51348 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The links to download Java plugin on Series 2600A web applications are broken.
Resolution:
This issue has been corrected.
12
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.5 Release: Noncritical fixes
PR51351 Models affected:
2601A, 2602A
Symptom:
Attempting to sweep current using the smuX.trigger.initiate() command erroneously fails with
error 802, "OUTPUT blocked by interlock", if-and-only-if the voltage limit exceeds 20 V.
Resolution:
This issue has been corrected.
PR51406 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
You may experience inappropriately degraded performance when using ethernet raw sockets and
telnet sockets. The degradation may occur when a number of small packets are exchanged across the
socket. This is caused by the Nagle algorithm which delays ethernet packets for up to 200 ms when
waiting to combine small packets for network efficiency.
In most cases packet immediacy is more desirable than network efficiency. The Nagle algorithm
should be disabled by default to eliminate this delay.
Resolution:
The Nagle algorithm is now disabled by default. If necessary for ethernet efficiency, set the
lan.nagle attribute to lan.ENABLE to enable the algorithm.
2600A-850S-FRP Rev.N / October 2015
13
Version 2.2.4 Release: Overview
Series 2600A Firmware Release Notes
Version 2.2.4 Release
Overview
Version 2.2.4 is a maintenance release of the Series 2600A firmware. This release resolves several noncritical
issues and provides a few enhancements.
Compatibility concerns
Version 2.1.3 introduced two fixes that affect the range-change timing of the source-measure unit (SMU). When
upgrading from firmware versions earlier than version 2.1.3, this may affect tests that use low-current ranges and
are sensitive to timing. See PR37782 and PR37908 in the “Noncritical fixes” section of the Version 2.1.3 Release
for more detail.
Noncritical fixes
PR46131 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If an End Pulse overrun occurs within 2 µs of a Source overrun, one of the two overruns may not be
reported.
Resolution:
This issue has been corrected.
PR46393 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
An Arm or Measure overrun that occurs during a sweep can very rarely cause the instrument to
become unresponsive.
Resolution:
This issue has been corrected.
PR48912 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Rarely, if smuX.trigger.source.stimulus is not equal to zero, the resulting sweep may halt
unexpectedly before executing the source action.
Resolution:
This issue has been corrected.
PR48939 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
14
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.4 Release: Enhancements
Symptom:
Mounting a USB flash drive during boot operation, or while the instrument is otherwise accessing its
nonvolatile memory, can cause the instrument to become unresponsive. Certain flash drives appear to
be more susceptible than others.
Resolution:
This issue has been corrected.
PR49236 Models affected:
2611A, 2612A, 2635A, 2636A
Symptom:
If smuX.source.autorangev is set to 1 and the interlock is not engaged, voltage sweeps that
cause the SMU to change to the 200 V source range improperly execute without error. Instead, the
execution attempt should fail with error code 802, "OUTPUT blocked by interlock." Note that the SMU
output does not actually exceed safe voltage levels when this issue occurs.
Resolution:
This issue has been corrected.
PR49357 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Very rarely, the completion of a sweep is not managed properly by the SMU. When this issue occurs,
the SMU remains in the sweeping state and must be aborted.
Resolution:
This issue has been corrected.
PR49358 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If smuX.trigger.measure.stimulus is nonzero, and smuX.trigger.measure.action is set
to smuX.ENABLED, then measurement overruns are not reported.
Resolution:
This issue has been corrected.
Enhancements
PR48817 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Keithley has updated its digital signature on all of its Series 2600A Java web applications (TSP
Express, TSB Embedded, Flash Upgrade, and Virtual Front Panel) to a stronger 2048-bit certificate.
2600A-850S-FRP Rev.N / October 2015
15
Version 2.2.4 Release: Enhancements
Series 2600A Firmware Release Notes
PR48924 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Compatibility with USB flash drives has been greatly improved. Many USB flash drive models that the
instrument could not previously recognize or access are now fully supported.
PR48940 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The instrument will respond with error code 1124, "Unrecognized USB device," if an unsupported
device (like a mouse) is installed in its front panel USB port.
Similarly, the instrument will respond with error code 1125, "USB overcurrent condition," if the installed
USB device trips the instrument's over current protection circuit.
16
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.3 Release: Overview
Version 2.2.3 Release
Overview
Version 2.2.3 is a maintenance release of the Series 2600A firmware. This release resolves one critical issue that
was introduced in version 2.2.1 and resolves two noncritical issues.
Compatibility concerns
Version 2.1.3 introduced two fixes that affect the range-change timing of the source-measure unit (SMU). When
upgrading from firmware versions earlier than version 2.1.3, this may affect tests that use low-current ranges and
are sensitive to timing. See PR37782 and PR37908 in the “Noncritical fixes” section of the Version 2.1.3 Release
for more detail.
Critical fixes
PR47374 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When smuX.source.offmode = smuX.OUTPUT_ZERO and smuX.source.offfunc =
smuX.OUTPUT_DCAMPS, turning the SMU off leaves the hardware in an invalid state. The effective
voltage in this state is:


The value of smuX.source.levelv if smuX.source.func is set to
smuX.OUTPUT_DCVOLTS
The value of smuX.source.limitv if smuX.source.func is set to
smuX.OUTPUT_DCAMPS
The effective current limit in this state is unpredictable, but can exceed the standard operating area of
the SMU.
Resolution:
This issue has been corrected.
Noncritical fixes
PR47317 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When setting smuX.sense to smuX.SENSE_CALA, the effective source range is determined by the
smuX.measure.rangeY setting instead of the smuX.source.rangeY setting. To properly calibrate
range R, smuX.measure.rangeY must be set to R before setting smuX.sense to
smuX.SENSE_CALA.
Resolution:
This issue has been corrected.
PR47416 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
17
Version 2.2.3 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Symptom:
In TSP Express, running tests with high capacitance mode enabled generates error code 5069,
"Autrorange locked for HighC mode," for the following configurations:



Source voltage, measure voltage
Source current, measure current
Source current, measure current and voltage
Resolution:
This issue has been corrected.
18
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.2 Release: Overview
Version 2.2.2 Release
Overview
Version 2.2.2 is a maintenance release of the Series 2600A firmware. This release resolves one critical issue that
was introduced in version 2.2.1, corrects some noncritical issues, and provides a few enhancements.
Compatibility concerns
Version 2.1.3 introduced two fixes that affect the range-change timing of the source-measure unit (SMU). When
upgrading from firmware versions earlier than version 2.1.3, this may affect tests that use low-current ranges and
are sensitive to timing. See PR37782 and PR37908 in the “Noncritical fixes” section of the Version 2.1.3 Release
for more detail.
Critical fixes
PR45674 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Loading scripts over a command interface or from a USB flash drive causes a memory leak. Loading
several large scripts or many smaller scripts in this manner will eventually result in an error -225, "TSP
Memory allocation error: not enough memory" or "Out of memory." Once in this state, you must turn
the instrument power off and then back on to recover.
Resolution:
This issue has been corrected.
Enhancements
PR44790 Models affected:
(A)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSP Express has been enhanced to support composite SMUs in series configurations. When using
this configuration, make sure that you connect the SMUs as shown in the connection diagram
displayed when using this feature. Also make sure that you follow all safety precautions.
PR44790 Models affected:
(B)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
An "Identify" button was added to the TSP Express combining SMU dialog window. Clicking this button
will flashes identification message on the front-panel display of individual SMUs that make up the
selected composite SMU. At the same time, a connection diagram displays to help you make or verify
the necessary connections.
PR44790 Models affected:
(C)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
19
Version 2.2.2 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Enhancement:
For negative sweeps, TSP Express automatically uses a small negative number (1e-30) very near
zero (0) instead of zero to avoid the 100 µs source-polarity change time.
PR44790 Models affected:
(D)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSP Express now rounds source and measure values of composite SMUs to nine decimal places.
PR45053 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Support was added to the virtual front panel web application for the Model 2651A fast ADC reading
buffer status bit. The new column is labeled "FastADC" for instruments that have a fast ADC, and is
labeled "Reserved" for those that do not.
Noncritical fixes
PR42741 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The virtual front-panel web application inappropriately formats some values when displaying reading
buffer data. For example, the 200 mV range displays as 0.20000000298023224, instead of 0.2.
Resolution:
This issue has been corrected.
PR44108 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Setting the current measure range while high-C mode is enabled has no effect.
Resolution:
When high-C mode is enabled, the last value assigned to the current measure range is retained and
then used to restore the current measure range when high-C mode is disabled.
PR44631 Models affected:
PR45298
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When clearing a reading buffer, any errors encountered are repeated nine times.
Resolution:
This issue has been corrected.
20
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.2 Release: Noncritical fixes
PR44965 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express does not report instrument errors on its "Script Error" dialog box. The errors display on
the "Instrument Output" field, but they are not visible unless the "Edit" tab is selected.
Resolution:
Instrument error messages now display on both the "Script Error" dialog box and the "Instrument
Output" field.
PR45106 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The IDLE event that occurs at the end of a sweep is generated before the SMU hardware has returned
to its idle state.
Resolution:
This issue has been corrected.
PR45283 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If you send a remote command with more than 1024 characters over the LAN socket interface, the
instrument attempts to execute the truncated portion of the command message (the portion in excess
of 1024 characters). This may or may not result in the instrument generating an error code 285, "TSP
Syntax error."
Resolution:
This issue has been corrected.
PR45338 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SWEEPING bit in the Operation Status SMU X Summary register
(status.operation.instrument.smuX) clears before the SMU recognizes that overlapped
operation has completed. Consequently, attempting to execute a SMU command immediately after the
SWEEPING bit is cleared can result in error code 5042, "Cannot perform requested action while an
overlapped operation is in progress."
Resolution:
This issue has been corrected.
PR45363 Models affected:
2612A, 2636A
2600A-850S-FRP Rev.N / October 2015
21
Version 2.2.2 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Symptom:
The status.questionable.unstable_output.SMUB constant is not defined. This constant
should be defined with a value of 4.
Resolution:
This issue has been corrected.
PR45488 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
An incorrect source level is displayed if you abort a fixed-source-range sweep by pressing the EXIT
key or the OUTPUT ON/OFF button on the front panel. The actual source level is the programmed idle
level, but the display indicates the last level active in the sweep before it was aborted.
Resolution:
This issue has been corrected.
PR45490 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When a sweep is aborted by a high-priority output off event under certain conditions, the current or
voltage source level is incorrectly changed to match the limit value. The table below describes these
conditions and the incorrect outcomes:
Condition
Sweep source function = Current
and
Off function = Voltage
Sweep source function = Voltage
and
Off function = Current
Incorrect outcome
The programmed current source
value changes to match the current
limit value.
The programmed voltage source
value changes to match the voltage
limit value.
The high-priority output off events that can cause this issue include:




Pressing the OUTPUT ON/OFF button
Resetting the TSP-Link
Detecting a SMU over-temperature condition
Disengaging the interlock
Resolution:
This issue has been corrected.
PR45706 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
A "FATAL ERROR" message may display and the instrument may become unresponsive if you insert
or remove a USB flash drive when the instrument is in use.
22
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.2 Release: Noncritical fixes
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
23
Version 2.2.1 Release: Overview
Series 2600A Firmware Release Notes
Version 2.2.1 Release
Overview
Version 2.2.1 is an enhancement release of the Series 2600A firmware. Several new features have been added
to the firmware, in addition to correcting outstanding issues.
Major enhancements
PR38798 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Each SMU now provides statistical data about the contents of a reading buffer. Statistics for the
dedicated reading buffers are now available from the remote interface and the front panel. See the
updated user documentation for additional details.
PR39726 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A new wrap-around mode allows the reading buffers to restart filling the buffer from the beginning
when the buffer becomes full. This new feature also provides control over the wrap window size. See
the updated user documentation for additional details.
PR42113 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A power compliance feature has been added. You can set the power compliance limit from a remote
interface using the smuX.source.limitp attribute. You can also set the power compliance limit
from the front panel by pressing CONFIG, then selecting CHANNEL-X > LIMIT, and then selecting
POWER. Alternatively, you can set the power compliance limit by pressing the LIMIT button once to
edit the limit, and then pressing it again to toggle between the normal limit value and the power limit.
Other enhancements
PR37083 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
In TSP® Express, project settings information (including sweep/SDM parameters) is now recorded in
exported .csv data files.
PR37585 Models affected:
PR43939
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A "Step-to-Sweep delay" input field has been added to the sweep's main screen to allow a
configurable delay to be inserted between an outer step SMU's source complete event and inner
24
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Other enhancements
sweep SMUs beginning their sweeps. This can be used to allow devices connected to the outer SMU
to settle before starting the inner sweeps.
PR39437 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The instrument no longer aborts a running script when the ethernet connection that started the script is
lost or closed. Upon loss of connection, the instrument remains in the remote control state (RCS), and
the client can reconnect to the instrument and resume getting all output messages.
NOTE
This does not guarantee there will be no data loss. Any data held in the network
layers of the previous connection will be lost.
PR40845 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The memory usage display on the front panel now displays the memory available and the total
memory in kilobytes, rather than as a hexadecimal number.
PR41135 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A new feature has been added to the TSP® Express software. For sweep functions, you can create
composite SMUs by combining compatible SMUs either in parallel or in series. Once created, you can
use the composite SMUs in the same way as actual SMUs within TSP Express. Composite SMUs
provide higher current or voltage sourcing capacity than a single SMU. Refer to the TSP Express
online help for more details about creating and using composite SMUs.
PR41457 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
During sweeps, the front-panel display now updates the source and measure values independently.
Previously, the source value was updated only when a new measurement value was available.
PR41483 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
All SMU attributes except smuX.source.compliance can now be read during an overlapped SMU
operation.
PR41971 Models affected:
(A)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
25
Version 2.2.1 Release: Other enhancements
Series 2600A Firmware Release Notes
Enhancement:
TSP Express was enhanced to support the Model 2651A, including support for the Model 2651A highspeed ADC.
PR41971 Models affected:
(B)
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A new check-box labeled "Connect Data Points" is now available at the bottom of the graph in TSP
Express. TSP Express no longer connects the data points with straight lines unless this box is
checked.
PR42071 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
When using the instrument front panel to change ranges, the instrument briefly displays the new range
setting. When toggling between fixed ranging and autoranging, the instrument briefly displays the
range setting or “AUTO.”
PR42249 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSB Embedded can now import scripts stored on the host computer.
PR42276 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSP-Net has been enhanced to filter Telnet escape sequences from the data stream when connecting
to a remote node using a Telnet connection.
PR42425 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Tab stops in the script editor areas of TSB Embedded and TSP Express are now four characters
apart.
PR42426 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A monospace font is now used in the script editor areas of TSB Embedded and TSP Express.
PR42546 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
26
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Other enhancements
Enhancement:
The TSP Express setup web page now has the same password protection as other applications that
are available on the instrument's LXI welcome page.
PR42568 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Attempting to execute a sweep with a fixed source range and with sweep points that exceed the fixed
range now generates a more specific error (error 5005, "Value too big for range") than the more
ambiguous error 1101, "Parameter too big."
PR42589 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Sweep memory management has been improved to allow certain sweep configurations that previously
resulted in error -225, "Out of Memory." Specifically, memory consumption now depends on the
smaller of the source point count (as defined by calls to smuX.trigger.source.linearY(),
smuX.trigger.source.logY(), or smuX.trigger.source.listY()) and the trigger count.
Previously, the trigger count had no affect on the memory consumption.
PR42603 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSB Embedded now supports using Ctrl+F as a hot-key combination for bringing up the Find dialog
box.
PR42807 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSP Express software now uses a more user-friendly data presentation. Instead of using reading
buffer names, TSP Express uses user-assigned SMU names (as well as its units) in its table headers,
plot X and Y axis labels, and exported .csv files. For example, instead of "Reading
(node[5].smua.nvbuffer2)", TSP Express will now show "Gate Reading (Volts)" when node[5].smua
is named "Gate" and measures voltage.
PR42990 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The automatic line frequency detection feature has been improved to more reliably detect the power
line frequency in noisy environments.
PR43312 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
27
Version 2.2.1 Release: Other enhancements
Series 2600A Firmware Release Notes
Enhancement:
For single and multi-SMU sweep tests in TSP Express, the default measure function is now current
(the default source function remains voltage). In addition, whenever the source function is changed,
TSP Express automatically selects the opposite function for measurement. For example, if you select
the current source function, TSP Express will update the measurement function to voltage. If the
selected measure function is both current and voltage, the measure function stays the same.
PR43890 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSB Embedded now changes the cursor to an hourglass for lengthy operations.
PR43933 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The instrument displays more dots during its power-up sequence to better show its progress.
PR44033 Models affected:
PR44282
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The source and measure ranging behavior when the output is off has been optimized to minimize the
duration of the output off/on transition.
PR44046 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Error messages in TSP Express for compliance and trigger overruns now include the node number
and model number of the instrument that generated the error condition.
PR44118 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSP Express now reports compliance by displaying a "Compliance detected..." button on the toolbar.
Clicking this button opens a dialog box with more information about the compliance. The button
disappears when the test is run again or the project is closed. This new mechanism for reporting
compliance events is less intrusive and allows you to ignore compliance detected messages if you
want.
PR44400 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
28
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Enhancement:
TSB Embedded now precedes commands typed in the command console command line with “TSP>”
when echoing the command in the response window to clarify what has been typed versus what has
been received from the instrument.
PR44567 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
To better reflect the behavior of the instrument in TSP Express, the measure range is now set to follow
the source range when the measure function is the same as the source function.
Noncritical fixes
PR37168 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument generates a -420, “Query Unterminated” error when it receives a read request from
any command interface other than the one currently controlling the instrument. This can result in the
test plan detecting errors that it did not cause.
Resolution:
The instrument now suppresses generation of -420, "Query Unterminated" errors when another
command interface is actively controlling the instrument.
PR38807 Models Affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A8807
Symptom:
The tsplink.reset() command does not return a prompt if there is a loop in the cascaded
TSP-Link® connections between instruments. Also, if the localnode.showerrors attribute is set,
the error is not immediately reported to the interface.
Resolution:
This issue has been corrected.
PR39084 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument ignores an endscript message if a script is not being downloaded. No errors are
generated, and no prompt is generated if prompting is enabled.
Resolution:
The instrument now generates a 2003, "EndScript without LoadScript" error. If prompting is enabled, it
now generates a prompt to acknowledge the receipt of the message.
PR39085
2600A-850S-FRP Rev.N / October 2015
29
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument ignores an endflash message if a firmware flash image is not being downloaded. No
errors are generated, and no prompt is generated if prompting is enabled.
Resolution:
The instrument now generates a 2002, "EndFlash without Flash" error. If prompting is enabled, it now
generates a prompt to acknowledge the receipt of the message.
PR39086 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When prompting is turned on and you are downloading a script using the loadscript or
loadandrunscript keyword, or when you are downloading a firmware flash image using the flash
keyword, the instrument does not generate a prompt for a *trg message.
Resolution:
The instrument now generates a prompt for *trg messages during script or firmware flash image
downloads if prompting is enabled.
PR39378 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The message for error number 2416 has a typographical error.
Resolution:
This issue has been corrected.
PR39519 Models affected:
2602A, 2612A, 2636A
Symptom:
Performing a sweep with measure autoranging turned on for one of the SMUs can interfere with a
sweep running on the other SMU.
Resolution:
This issue has been corrected.
PR39693 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express does not always show instrument errors in its Error Queue window. It also stays in the
Run state and you must press the Abort and Reset buttons to regain control.
30
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Resolution:
This issue has been corrected.
PR39694 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP® Express incorrectly imports a .csv file into a sweep list when the .csv file has blank lines. For
each blank line, TSP Express arbitrarily chooses a source level for the step with a blank line.
Resolution:
TSP Express now imports blank lines within the .csv file as 0. It does not import blank lines at end of
the .csv file. TSP Express also shows a warning message when any of these conditions are detected.
PR39695 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The TSP® Express sweep list editor allows importing more than 1000 points, but the points in excess
of 1000 are discarded without warning when the list editor is closed.
Resolution:
The TSP Express sweep list editor now generates an Import Warning dialog box indicating that only
the first 1000 data points will be imported when the file contains more than 1000 points.
PR39776 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the instrument description in the localnode.description attribute is blank, TSP Express
incorrectly determines the line frequency of the instrument and always uses 60 Hz for all calculations
that are line-frequency dependent.
Resolution:
This issue has been corrected.
PR39793 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Sending a message longer than 1024 bytes to the instrument over a VXI-11 connection may make the
instrument unresponsive. PR39160 in version 2.1.4 only partially repaired this issue.
Resolution:
This issue has been corrected.
PR39817
2600A-850S-FRP Rev.N / October 2015
31
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Deadlock conditions detected by the VXI-11 interface are not reported to the error queue.
Resolution:
This issue has been corrected.
PR39867 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Heavy LAN I/O may cause the instrument to stop responding.
Resolution:
This issue has been corrected.
PR39873 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Neither the reset() function, nor the lan.trigger[N].clear() function clears the
lan.trigger[N].overrun indicator.
Resolution:
This issue has been corrected.
PR39875 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SMU may return an incorrect measurement when using an aperture greater than 24 NPLC.
Resolution:
This issue has been corrected.
PR39907 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Interacting with the instrument's web page while the instrument is upgrading its firmware will cause the
instrument to halt the firmware upgrade. This can render the instrument unable to power up, which
must be repaired at the factory.
Resolution:
The web server is now halted while reprogramming the firmware.
32
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
PR39925
PR39926
PR39927
PR39928
PR39929
PR39930
Version 2.2.1 Release: Noncritical fixes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a certain SMU command is pending when any of the following events occur, the source output may
not turn off for several seconds or longer:
 The OUTPUT ON/OFF key is pressed.
 The output enable (Model 2601A/2602A) or interlock (Model 2611A/2612A/2635A/2636A) line is
disengaged.
 A SMU over-temperature condition is detected.
 A TSP-Link reset operation is initiated on a remote node.
The delay is dependent on the SMU configuration. During the delay, the SMU OUTPUT ON/OFF LED
on the front panel blinks, indicating that the output off event is being processed.
The following SMU commands are vulnerable to this issue:






smuX.source.func
smuX.source.highc
smuX.source.offlimiti
smuX.source.offmode
smuX.source.output
smuX.trigger.initiate()
Resolution:
This issue has been corrected.
PR39931 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SMU source and measure delays are enforced when the instrument is in the local control state.
When these delays are set to large values, front-panel control is very sluggish and there is no way to
change the delay values from the front panel.
Resolution:
The smuX.measure.delay and smuX.source.delay attributes are now ignored when the
instrument is in the local control state (LCS).
PR39948 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSB Embedded does not display the contents of autorun scripts.
Resolution:
This issue has been corrected.
PR40188
2600A-850S-FRP Rev.N / October 2015
33
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument may generate a fatal error if another node on the TSP-Link network performs a
tsplink.reset() while the instrument is powering up.
Resolution:
This issue has been corrected.
PR40197 Models affected:
PR43004
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a TSP-Link reset operation is performed while a SMU operation is pending on a node in the system,
it is possible for that node to become unresponsive. If this happens, you must turn off instrument
power and then turn it on again.
Resolution:
This issue has been corrected.
PR40330 Models affected:
PR40331
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Any abort action that occurs during execution of a smuX.trigger.initiate()or
smuX.measure.Y() command when used with a reading buffer may not be fully processed, requiring
a front panel EXIT key press to complete. If the abort action was initiated from the front panel by either
an EXIT key press or an OUTPUT ON/OFF button press, the instrument may become unresponsive,
requiring the instrument power to be turned off and then on again.
Resolution:
This issue has been corrected.
PR40359 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Setting the tsplink.group attribute does not generate an error when the value is less than zero.
Resolution:
Setting the tsplink.group attribute to a value less than zero now generates a -222, "Parameter
data out of range" error.
PR40366 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
34
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Symptom:
Aborting a sweep or a nonoverlapped measurement operation may cause the instrument to become
unresponsive.
Resolution:
This issue has been corrected.
PR40450 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
After aborting certain measurement operations, attempting to execute another such measurement
operation results in the second operation never completing. This occurs only if the second operation is
started before the first operation would have completed had it not been aborted. The vulnerable
measurement operations are:
 Any smuX.measure.Y() command, when the command is executed with a reading buffer
parameter and the smuX.measure.count attribute is greater than 1.
 Any sweep, when the measure action is enabled, the smuX.measure.count attribute is greater
than 1, and the abort action occurs during the measure action.
Resolution:
This issue has been corrected.
PR40502 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using the instrument over the GPIB interface, switching the instrument from active talker to
active listener while there are more responses in the output queue can cause the instrument to
operate erratically. When this happens, the instrument may drop a few characters from the incoming
command message. In some circumstances it stops responding.
Workaround:
Insert a small delay between addressing the instrument to listen and sending the first character of the
message.
Resolution:
This issue has been corrected.
PR40554 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
In the SMU trigger model, the measure action block will not wait for the measure stimulus if the
measure action is disabled.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
35
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
PR40667 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If smuX.trigger.autoclear is enabled, the measure detector does not clear as expected when
the trigger model transitions from the arm layer to the trigger layer.
Resolution:
This issue has been corrected.
PR40675 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Calling the reset() function in an autorun script generates a -222, "Parameter data out of range"
error.
Resolution:
This issue has been corrected.
PR40676 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Graphs with very small axis values (less than 0.001) are not labeled correctly in TSP Express. Some
of the axes are labeled as "0" instead of the correct value in scientific notation (for example, "1.0E-6").
Resolution:
This issue has been corrected.
PR40688 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When executing the PulseIMeasureV or PulseVMeasureI factory script, setting the bias level to a
value that exceeds the source range (which is determined by the pulse level) results in an error.
Resolution:
This issue has been corrected.
PR40689 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If the reference cache for the specified NPLC is empty and the smuX.meaure.autozero attribute is
set to smuX.AUTOZERO_OFF, attempting to store measurements in a reading buffer using the
smuX.trigger.initiate() or smuX.measure.Y() commands results in erroneous readings. All
36
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
subsequent readings will be incorrect. To recover, the instrument power must be turned off, and then
turned on again.
Resolution:
This issue has been corrected.
PR40745 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If an autozero measure operation is performed after a smuX.trigger.initiate() command
results in error 5039, "Measure count exceeds buffer capacity" or error -225, "Out of memory," but
before a reset() or smua.reset() is executed, all subsequent readings will be erroneous
readings.
Resolution:
This issue has been corrected.
PR40965 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a SMU channel is configured as a voltage source with a current limit greater than 100 mA, and
current measure autoranging is enabled, the first measurement that occurs after a polarity change
may be made on the 1 A range when a lower current measurement range would be more appropriate.
Resolution:
This issue has been corrected.
PR41132 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
A device configuration error occurs in TSP Express when there are more than six instruments
connected in a TSP-Link network.
Resolution:
This issue has been corrected.
PR41134 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express is not able to show more than 10 SMUs on its device configuration window.
Resolution:
This issue has been corrected.
PR41159
2600A-850S-FRP Rev.N / October 2015
37
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When sweeping with autoranging enabled, the smuX.abort() command may cause the instrument
to become unresponsive if the command is executed while a range change is in progress.
Resolution:
This issue has been corrected.
PR41221 Models affected:
2611A, 2612A
Symptom:
TSP Express allows entry of invalid current source values when autorange is selected.
Resolution:
This issue has been corrected.
PR41284 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If the trigger limit (smuX.trigger.source.limitY) is smaller than the bias limit
(smuX.source.limitY), and the range appropriate for the bias limit is larger than the range
appropriate for the trigger limit (for example, smua.source.limiti = 10e-3 and
smua.trigger.source.limiti = 1e-3) , the bias limit used during the sweep will be smaller
than desired.
Resolution:
This issue has been corrected.
PR41310 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
During sweeping operations, the limit range is determined by either the normal source limit
(smuX.source.limitY) or the sweep source limit (smuX.sweep.source.limitY), whichever is
higher. If the lower of these two settings is less than 10 percent of the limit range, this lower limit may
not be enforced properly.
Resolution:
When the effective limit would be below 10 percent of the limit range, the instrument now uses a limit
value that is 10 percent of the limit range instead of the requested limit value. This is an inherent
limitation of the SMU hardware.
PR41313 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
38
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Symptom:
TSP Express only reports the first voltage/current compliance event on a remote node; any further
compliance events on that node are not reported.
Resolution:
This issue has been corrected.
PR41323 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Output signal glitches may occur shortly before the start of a TSP Express generated sweep.
Resolution:
This issue has been corrected.
PR41439 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If an operation on a SMU is aborted using a command such as abort or smuX.abort(), or by using
the front-panel EXIT button, a SMU Armed event is generated, but should not have been generated.
Resolution:
This issue has been corrected.
PR41798 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When attempting to turn the SMU source on when the level and limit settings exceed the standard
operating area, the SMU erroneously illuminates the OUTPUT ON/OFF LED, even though it correctly
generates an error and does not actually turn the source on. When this occurs, the LED remains
illuminated until the SMU output is explicitly turned off.
Resolution:
This issue has been corrected.
PR41912 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the front panel is configured for single channel display with the source and measure functions
the same, pressing the range up or range down buttons to change the measure range may change the
measure range that will be used when the source function is toggled between voltage and current.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
39
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
PR41939 Models affected:
PR42802
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
After performing a TSP-Link reset from one node, performing another TSP-Link reset from another
node on the network without first running remote commands on that node causes all nodes on the
TSP-Link to become unresponsive.
Resolution:
This issue has been corrected.
PR41948 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When source autoranging is enabled, if the smuX.source.lowrangeY attribute is set to a range
higher than the active source range, and then source autoranging is disabled, the instrument does not
properly track the active source range. In this state, reading the source range does not return the
correct value, and the front-panel display does not indicate the correct source range. The issue is
resolved by performing a SMU reset operation, explicitly setting the source range, or re-enabling
source autoranging.
Resolution:
This issue has been corrected.
PR41950 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When turning on high-C mode as a voltage source, the current source range is not properly updated to
reflect the 1 µA minimum range restriction in this mode. Similarly, when turning on high-C mode as a
current source, the current limit is not properly updated to reflect the 1 µA minimum limit restriction. In
both cases, the update will occur when the opposite source function is selected.
Resolution:
This issue has been corrected.
PR41967 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The errorqueue.next() command does not return the originating TSP-Link node ID as its fourth
return value.
Resolution:
This issue has been corrected.
PR41983
40
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Passing a value of the wrong type to any remote command function that expects any of its parameters
to be a string, reading buffer, or array may cause a fatal exception.
Resolution:
This issue has been corrected.
PR42077 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Setting a measure low range to a range higher than the active measure range will cause autorange to
be disabled.
Resolution:
This issue has been corrected.
PR42191 Models affected:
PR42292
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
LAN triggers routed back to the instrument (self-triggering) cause two event messages to be logged in
the LXI event queue.
Resolution:
This issue has been corrected.
PR42193 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Accessing a web page while executing a command that saves data to nonvolatile memory will cause
the instrument to become unresponsive.
Resolution:
This issue has been corrected.
PR42210 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSB Embedded does not warn you when there is an error saving a file, such as when saving a file to a
read-only directory.
2600A-850S-FRP Rev.N / October 2015
41
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Resolution:
This issue has been corrected.
PR42247 Models affected:
PR42278
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using TSB Embedded, deleting a script deletes the script from nonvolatile memory but does not
remove the script from the runtime environment. As a result, you cannot save another script using the
same name until the instrument is rebooted or the script is manually removed from the runtime
environment.
Resolution:
This issue has been corrected.
PR42265 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSB Embedded shows the error "Script null doesn't exist" when you attempt to view or list a script that
does not exist in the instrument. It should use the script name entered by the user instead of "null."
Resolution:
This issue has been corrected.
PR42288 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Errors in exporting a script to a USB flash drive are not always reported by TSB Embedded.
Resolution:
This issue has been corrected.
PR42329 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The system status registers do not update appropriately if a node is asserting its node bit in one of the
system status registers (status.system.condition, status.system2.condition,
status.system3.condition, status.system4.condition, or
status.system5.condition), the node number of the node is changed, and a
tsplink.reset() command is performed.
Resolution:
This issue has been corrected.
PR42387
42
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Performing certain source operations with the output off after calling smuX.reset() can cause
unexpected error messages, for example, "Value too big for range."
Resolution:
This issue has been corrected.
PR42416 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When executing a sweep, the reported source values for any readings that occur after the first sweep
complete event will not be correct when all of the following conditions apply:




The measure action is enabled.
Source values are being collected in the reading buffer.
The arm count is greater than 1.
The trigger count is greater than the number of points used to define the sweep in the
smuX.trigger.source.linearY(), smuX.trigger.source.logY(), or
smuX.trigger.source.listY() command.
Resolution:
This issue has been corrected.
PR42417 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When exporting a script to a USB flash drive using TSB Embedded, if a file with the same name
already exists, it is overwritten without warning.
Resolution:
Before overwriting a script, TSB Embedded now opens a dialog box requesting confirmation that the
script should be overwritten.
PR42461 Models affected:
PR42902
2602A, 2612A, 2636A
Symptom:
The instrument can only save three user setups. After saving three setups, saving setups to any other
slot other than the three already saved results in a -225, "Out of Memory" error.
Resolution:
This issue has been corrected.
PR42494
2600A-850S-FRP Rev.N / October 2015
43
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express crashes when graphing "Source Value" versus "Reading" data from two different sweep
SMUs as an I-V curve (both "Device Source" and "Device Measure" options selected).
Resolution:
This issue has been corrected.
PR42550 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
In TSB Embedded, sending a command that contains pound symbol (#) characters causes TSB
Embedded to stop responding.
Resolution:
This issue has been corrected.
PR42551 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
In TSB Embedded, the "Reset Unit" button should be changed to "Reset," because it will reset not only
the master node in a TSP-Link network, but also all other nodes connected to the master node.
Resolution:
This issue has been corrected.
PR42554 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Executing a smuX.measureYandstep() command when the output is off may erroneously result in
an error 5005, "Value too big for range."
Resolution:
This issue has been corrected.
PR42562 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Calling smuX.measure.Y() with a reading buffer as the command's argument erroneously sets the
smuX.trigger.measure.action attribute.
44
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Resolution:
This issue has been corrected.
PR42584 Models affected:
PR42591
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
PR42617
Symptom:
Interacting with the instrument through a remote interface while it is reprogramming the firmware can
cause the instrument to stop functioning. If this happens, the instrument must be returned to the
factory for repair.
Resolution:
This issue has been corrected.
PR42585 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If smuX.trigger.measure.Y() is used with a dynamically created reading buffer, then all
references to that reading buffer are destroyed and the Lua garbage collector is (explicitly or implicitly)
invoked before the associated smuX.trigger.initiate() is executed, then the
smuX.trigger.initiate() will cause the instrument to become unresponsive.
Resolution:
When a reading buffer that is being reclaimed by the garbage collector is configured in a sweep, the
SMU will reset its sweep measurement configuration.
PR42596 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the smuX.source.settling attribute is set to smua.SETTLE_DIRECT_IRANGE, and the
source function is changed from voltage to current while the output is on, attempting to set the source
current range to a level below the current limit without first explicitly setting the current level causes the
instrument to erroneously generate an error 5005, "Value too big for range."
Resolution:
This issue has been corrected.
PR42597 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If measure autorange is enabled and a measure operation is aborted while a reading is being acquired
on an inappropriate range, the next measure operation will stall. Aborting the stalled operation allows
the instrument to recover without further error.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
45
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
PR42628 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The display.loadmenu.add() command does not save the menu items to nonvolatile storage.
Resolution:
This issue has been corrected.
PR42631 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using the front panel to select a script to load from a subdirectory on a USB flash drive, the
instrument becomes unresponsive while backing out of the menu tree to get to the main display.
Resolution:
This issue has been corrected.
PR42638 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The defined order of the bits in the Operation Status Trigger Blender Overrun register set is reversed.
BLND1 corresponds to blender 4, BLND2 corresponds to blender 3, BLND3 corresponds to blender 2,
and BLND4 corresponds to blender 1.
Resolution:
This issue has been corrected.
PR42716 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The InitiatePulseTestDual() function allows the same SMU channel to be specified for both
pulsing SMUs. However, the same SMU channel cannot be used for two different pulses at the same
time. The Series 2600 instruments properly check for this condition and generate an error message,
but the Series 2600A instruments do not.
Resolution:
The instrument now generates the same error as the Series 2600 instruments generate.
PR42770 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
46
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Symptom:
When using the front panel to select a firmware image to upgrade from a sub-directory on a USB flash
drive, the instrument becomes unresponsive while backing out of the menu tree to get to the main
display.
Resolution:
This issue has been corrected.
PR42781 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Using high-C mode with a current source sweep may cause an erroneous error 5044, “Cannot perform
requested operation while current measure autorange is enabled.”
Resolution:
This issue has been corrected.
PR42796 Models affected:
2602A, 2612A, 2636A
Symptom:
Saving a reading buffer for channel B from the front panel results in a data type error. The reading
buffer is not saved.
Resolution:
This issue has been corrected.
PR42831 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Setting the smuX.measure.autorangei attribute does not cause an error when it is set to an invalid
value.
Resolution:
Setting the smuX.measure.autorangei attribute to an invalid value now results in error -224,
"Illegal parameter value."
PR42901 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The NPLC reference cache does not always replace the correct (least recently used) entry when
changing the ADC aperture.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
47
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
PR42920 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Turning on high-C mode with the output on as a voltage source can cause incorrect compliance limit
operation. Turning the output off and then on again corrects the issue.
Resolution:
This issue has been corrected.
PR42994 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a sweep is configured with the measure action disabled, but a measure stimulus is configured
(smuX.trigger.measure.stimulus is set to a nonzero value) and the configured measure
stimulus event occurs simultaneously with a call to smuX.trigger.initiate(), an erroneous
measurement may be triggered. If this happens, all subsequent attempts to make measurements will
fail, resulting in bad measurement data or causing the instrument pause indefinitely. If the instrument
pauses indefinitely, an abort command must be sent to recover.
Resolution:
This issue has been corrected.
PR42996 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Attempting a contact check measurement with the smuX.source.offlimiti attribute set below 1
mA causes an error 5050, "I limit too low for contact check" to be generated. The error is misleading
because it implies the source limit is too low, when it is actually the smuX.source.offlimiti
setting causing the contact check failure.
Resolution:
In this situation, the SMU now generates an error 5066, "source.offlimiti too low for contact check."
PR42998 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Attempting to perform a contact check measurement when the instrument is configured as a current
source with the output on may cause an error 5050, "I limit too low for contact check" if the source
range is lower than 1 mA. The error message is misleading because the source range is causing the
contact check failure, not the I limit.
Resolution:
In this situation, the SMU now generates an error 5065, "I range too low for contact check".
48
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
PR43003 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If any of the smuX.trigger.*.stimulus attributes are set to an invalid numeric value, an error is
correctly generated, but the attribute is still set to the invalid value.
Resolution:
This issue has been corrected.
PR43025 Models affected:
2611A, 2612A, 2635A, 2636A
Symptom:
When sourcing current on the 10 A range, the smuX.measureYandstep() command allows current
levels greater than 1.5 A, which is outside the DC operating area of the instrument.
Resolution:
Attempting to use the smuX.measureYandstep() command to source a current level greater than
1.5 A will now result in an error 1101, "Parameter too big."
PR43046 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Sweeps may exhibit timing anomalies normally associated with measure autoranging if source
readback measurements are made and measure autoranging is enabled for that function. Because the
readback range is fixed to the source range, actual autoranging does not occur, but the timing of the
measurements may still be compromised.
Workaround:
Disabling measure autorange for this function results in more deterministic timing.
Resolution:
This issue has been corrected.
PR43150 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If the measure stimulus of a SMU occurs while smuX.trigger.initiate() is executing, the
measurement engine may go into an invalid state. When this occurs, the sweep will not terminate and
must be aborted.
Resolution:
This issue has been corrected.
PR43168
2600A-850S-FRP Rev.N / October 2015
49
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Rarely, the instrument may fail to start properly when it is turned on. When this occurs, the front panel
continues displaying the Keithley model number and does not show the default screen. The instrument
will start normally after turning the power off and then turning it on again.
Resolution:
This issue has been corrected.
PR43252 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
A sweep that performs a large number of current measurements using the 100 mA fixed range
appears to complete successfully, but leaves the instrument unresponsive to subsequent SMU
commands. This condition occurs only when the SMU's NPLC setting is not in the reference cache
when the sweep is initiated.
Resolution:
This issue has been corrected.
PR43265 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using a display input command with parameters that would place an input area off the edge of
the display, the instrument generates an inappropriate -213, "Too much data" error.
Resolution:
The instrument now generates a 1700, "Display area boundary exceeded" error.
PR43291 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using TSP Express in Basic SDM mode, voltage limit values are not checked and are not used
in the test.
Resolution:
This issue has been corrected.
PR43319 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
50
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Symptom:
If the smuX.measure.filter.count attribute is changed when the
smuX.measure.filter.type attribute is set to smuX.FILTER_MOVING_AVG, the filter will not
function properly until the filter type is changed and the filter count is set again.
Resolution:
This issue has been corrected.
PR43343 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The minimum off-time between extended operating area (EOA) pulses is calculated based on an ontime that may be up to 100 µs greater than the actual on-time. As a result, the maximum achievable
duty cycle is smaller than expected.
Resolution:
This issue has been corrected.
PR43357 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Recalling a user-setup from the front-panel display when the limit setting is displayed in a format for a
higher range may result in a limit value that has less resolution than its original value.
Resolution:
This issue has been corrected.
PR43390 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When storing measurements to a reading buffer when sweeping or when using the
smuX.measure.Y() function, if smuX.measure.autozero is set to smuX.AUTOZERO_AUTO, the
first reading after the autozero acquisition will not meet the accuracy specifications of the instrument if
it is triggered less than 10 microseconds after the autozero acquisition has completed.
Resolution:
This issue has been corrected.
PR43408 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Current measurements acquired shortly after changing from a measure range of 1 A or greater to the
100 nA range may be outside of specifications.
2600A-850S-FRP Rev.N / October 2015
51
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Resolution:
A 45 ms delay was added to the measure range change.
PR43412 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The "DHCP lease lost" LAN fault indicator is cleared when the instrument subsequently obtains a
different IP address through DLLA. Rule 8.10 in LXI Standard rev. 1.2 requires the LAN status
indicator to remain in the fault state for this particular scenario.
Resolution:
This issue has been corrected.
PR43417 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Certain measure operations are unexpectedly slow if measure autoranging is enabled. These
operations include measuring to a reading buffer using the smuX.measure.Y() commands, and
measuring during sweeps. The issue occurs when measuring voltage as a current source, and when
measuring current near zero (0) on the lowest current range as a voltage source.
Resolution:
This issue has been corrected.
PR43424 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The smuX.source.offlimiti attribute is not stored or recalled when using a saved setup.
Resolution:
This issue has been corrected.
PR43443 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The smuX.source.highc and smuX.source.sink attributes are not saved in the saved setups.
Resolution:
These attributes are now saved in the saved setups and restored when the setup is recalled.
PR43650 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
52
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Symptom:
If the measurement filter is enabled with the filter type set to smuX.FILTER_REPEAT_AVG, and a
measure operation is aborted, the next measure operation may leave the measure engine in a faulty
state unless the filter type or filter count is first changed, or the filter is first disabled. Once the measure
engine is in this state, all subsequent measurements may produce invalid results, and measure and
sweep operations may stall unexpectedly. To recover, the instrument power must be turned off and
then turned back on again.
Resolution:
This issue has been corrected.
PR43719 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the front panel is set to display 6 1/2 digits, measurements with a nonzero first digit always have
zero (0) for the least significant digit.
Resolution:
This issue has been corrected.
PR43786 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Taking readings when smuX.measure.filter.enable is set to 1 and
smuX.measure.filter.type is set to smuX.FILTER_MEDIAN can cause the instrument to
become unresponsive. This occurs rarely and is most likely to happen soon after the first use of the
median filter after the instrument power is turned on.
Resolution:
This issue has been corrected.
PR43888 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using TSB Embedded to delete a script from the instrument, there is no prompt to confirm
deletion of the script.
Resolution:
TSB Embedded now presents a confirmation dialog box before deleting a script.
PR43906 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Disabling high-C mode may inappropriately modify the following attributes:
2600A-850S-FRP Rev.N / October 2015
53
Version 2.2.1 Release: Noncritical fixes





Series 2600A Firmware Release Notes
smua.measure.lowrangei
smua.measure.rangei
smua.source.limiti
smua.source.lowrangei
smua.source.rangei
These settings are recorded when high-C mode is enabled, and the captured values are restored
when high-C mode is disabled.
Resolution:
This issue has been corrected.
PR43907 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Enabling high-C mode as a voltage source when smua.source.rangei is 100 nA puts this setting in
an invalid state. The source range is actually 1 µA, but reading smua.source.rangei indicates that
it is still 100 nA. Changing the source function or explicitly setting smua.source.rangei resolves
the inconsistency.
Resolution:
This issue has been corrected.
PR43971 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument may display the message "FATAL ERROR e60 v18" and become unresponsive when
any of the following conditions are true:



A trigger timer's delay is set to a value greater than 65.535 ms and the trigger timer is reset at
the same time as its stimulus occurs.
The instrument is performing a measurement with a measure interval greater than 65.535 ms
and the SMU operation is aborted at the same time as an ADC conversion is triggered.
A digital I/O pulse width is set to a value greater than 65.535 ms and is reset at the very start
of its pulse.
Resolution:
This issue has been corrected.
PR44015 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If two SMU source stimulus events or two SMU end-pulse stimulus events occur within 100 ns of each
other, the second stimulus event is ignored without any indication.
Resolution:
The second stimulus event now generates an overrun condition.
54
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
PR44043 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express cannot communicate with the instrument when both of the following are true:


The localnode.password attribute is set to a nonempty string.
The localnode.passwordmode attribute is set to either localnode.PASSWORD_LAN or
localnode.PASSWORD_ALL.
TSP Express is able to communicate with the instrument when localnode.passwordmode is set to
localnode.PASSWORD_WEB (default value).
Resolution:
This issue has been corrected.
PR44055 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using multiple SMUs, and two or more SMUs are in compliance, TSP Express only reports
compliance on one SMU. The compliance on remaining SMUs may be mistakenly reported on
subsequent tests.
Resolution:
TSP Express now reports all SMUs that are in compliance. It also prompts you to check the source
limit setting.
PR44066 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The severity levels of many SMU errors are misleading.
Resolution:
The severity levels of several SMU errors have been reduced. Refer to the updated user
documentation for the complete list of errors and severity levels.
PR44144 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a sweep or a nonoverlapped measurement to a reading buffer is aborted just as the SMU is
adjusting its measure range, and measure autoranging was previously enabled with the measure
delay set to a nonzero value, the measurement engine state can become invalid. Once in this state, all
subsequent measurements are invalid, and the execution of further SMU commands causes the
instrument to become unresponsive. The instrument power must be turned off and turned back on
again to recover.
2600A-850S-FRP Rev.N / October 2015
55
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Resolution:
This issue has been corrected.
PR44201 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Aborting a measurement operation initiated by a sweep or by the smuX.measure.Y() command can
leave the measurement engine in an invalid state if the measure count is greater than one (1) and the
specified measure interval is a smaller value than the system can achieve. Once in this state, all
further readings are erroneous and subsequent SMU commands may cause the instrument to become
unresponsive. The instrument power must be turned off and then turned back on again to recover.
Measurements initiated with the smuX.measure.overlappedY() command do not cause this issue
when aborted.
Resolution:
This issue has been corrected.
PR44264 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the smuX.source.func attribute is set to smuX.OUTPUT_DCAMPS and measurements are
being made and stored in a reading buffer with the output off, the buffer will indicate current as the
source function.
Resolution:
This issue has been corrected.
PR44296 Models affected:
PR44433
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When smuX.measure.autorangeY is set to smuX.AUTORANGE_FOLLOW_LIMIT, the Y measure
range follows the Y limit range, even when the source function is set to Y. In this situation, the Y
measure range should follow the Y source range.
Workaround:
This issue can be avoided by setting smuX.measure.autorangeY to
smuX.AUTORANGE_FOLLOW_LIMIT only when the Y limit is active (only when sourcing the
complementary function).
Resolution:
This issue has been corrected.
PR44357 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
56
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.2.1 Release: Noncritical fixes
Symptom:
The syntax coloring of embedded quotes in TSB Embedded is incorrect. An example of an embedded
quote is print('Hello " ').
Resolution:
This issue has been corrected.
PR44365 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Erroneous packets from a DHCP server cause a fatal exception or cause the instrument to become
unresponsive. This is known to happen with the DualServer v2.1 DHCP server.
Resolution:
This issue has been corrected.
PR44383 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If measure autoranging is enabled, attempting to set the measure range to a value below the low
range setting causes the measure range to be set to the low range instead.
Resolution:
This issue has been corrected.
PR44434 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If smuX.measure.autorangei is set to smuX.AUTORANGE_FOLLOW_LIMIT and the output is off in
high-Z mode, the I measure range does not properly follow the I limit range.
Resolution:
This issue has been corrected.
PR44438 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When smuX.measure.autorangeY is set to smuX.AUTORANGE_FOLLOW_LIMIT, explicitly setting
the measure range does not properly disable the autorange setting.
Workaround:
To ensure proper behavior after using this setting, explicitly set smuX.measure.autorangeY to
smuX.AUTORANGE_OFF.
2600A-850S-FRP Rev.N / October 2015
57
Version 2.2.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Resolution:
This issue has been corrected.
PR44632 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SMU incorrectly updates its programmed source range and source low-range settings when
setting the smuX.source.lowrangeY to a value that generates an error.
Resolution:
This issue has been corrected.
PR44649 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Enabling source autorange when the output is off does not cause the source range to drop to its low
range, as would be expected.
Resolution:
This issue has been corrected.
58
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.6 Release: Overview
Version 2.1.6 Release
Overview
Version 2.1.6 is a maintenance release of the Series 2600A firmware.
Critical fixes
PR40233 Models affected:
PR41866
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
PR41932
Symptom:
When sweeping, the SMU will return incorrect measurements of the source function if source
autoranging is enabled and the source changes ranges during the sweep. The first measurement and
all measurements made on the starting source range will be correct. Only measurements made on a
different range will be erroneous. Additionally, the measurement range indicated in the reading buffer
for erroneous measurements is also incorrect.
Resolution:
This issue has been corrected.
Enhancements
PR40548 Models affected:
PR42284
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
USB flash drive compatibility has been improved.
Noncritical fixes
PR37779 Models affected:
PR41916
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument updates the wrong bit in the status.system, status.system2,
status.system3, status.system4, or status.system5 status register after changing the
TSP-Link® node number and performing a TSP-Link reset. The instrument continues to update the bit
corresponding to the node number it had when the instrument was turned on.
Resolution:
This issue has been corrected.
PR41897 Models affected:
PR41933
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a SMU channel is configured as a voltage source with a current limit greater than 100 mA and
current measure autoranging enabled, the first measurement that occurs after a polarity change may
be made on the 1 A range when a lower current measurement range would be more appropriate.
2600A-850S-FRP Rev.N / October 2015
59
Version 2.1.6 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Resolution:
This issue has been corrected.
PR41921 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The System Summary Registers (status.system.condition) do not work reliably. Some bits may
become stuck in the set state.
Resolution:
This issue has been corrected.
60
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.5 Release: Overview
Version 2.1.5 Release
Overview
Version 2.1.5 is a maintenance release of the Series 2600A firmware.
Critical fixes
PR39869 Models affected:
PR40385
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If any SMU sourcing command is pending when any of the following events occur, the source output
may not turn off as expected:




The output on/off key is pressed.
The output enable (2601A/2602A) or interlock (2611A/2612A/2635A/2636A) line is disengaged.
A "SMU too hot" condition is detected.
A TSP-Link reset operation is initiated on an external node.
Resolution:
This issue has been corrected.
Enhancements
PR39940 Models affected:
PR40398
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
When the instrument needs to turn the output of a SMU off, but the SMU is busy performing another
operation, the output LED on the front panel will now blink until the output has turned off. This might
happen in the following situations:




The output on/off key is pressed.
The output enable (2601A/2602A) or interlock (2611A/2612A/2635A/2636A) line is disengaged.
A "SMU too hot" condition is detected.
A TSP-Link reset operation is initiated on an external node.
Noncritical fixes
PR39582 Models affected:
PR40375
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the io.open() function fails to open a file, it returns only an error string when it should return
nil and an error string.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
61
Version 2.1.5 Release: Noncritical fixes
Series 2600A Firmware Release Notes
PR39809 Models affected:
PR40207
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
PR40400
Symptom:
Aborting a sweep may infrequently result in a fatal error message on the front panel or may cause the
unit to become unresponsive.
Resolution:
This issue has been corrected.
PR39848 Models affected:
PR40380
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a smuX.source.func, smuX.source.output, smuX.source.leveli, or
smuX.source.levelv command is executing, any attempt to abort will not complete until the source
delay has expired.
Resolution:
This issue has been corrected.
PR39868 Models affected:
PR40379
2601A, 2602A
Symptom:
If the smua.source.outputenableaction attribute is set to 1, rapidly disengaging and reengaging
the output enable line may cause the unit to become unresponsive, requiring power to be turned off,
and then on again to recover.
Resolution:
This issue has been corrected.
PR39884 Models affected:
PR40382
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The front-panel output on/off LEDs do not indicate changes in the SMU output until after the source
delay has expired.
Resolution:
The LED is now turned on when the output is turned on (before the source delay), and it is turned off
after the source delay.
PR39899 Models affected:
PR40383
2611A, 2612A, 2635A, 2636A
62
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.5 Release: Noncritical fixes
Symptom:
When the SMU is configured for the 200 V source range, disengaging the interlock immediately after
turning the output on does not result in the output turning off as expected. Instead, the output is limited
to a safe voltage, nominally 35 V.
Resolution:
This issue has been corrected.
PR39916 Models affected:
PR39985
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
PR39996
Symptom:
The instrument may generate a fatal error when a trigger is detected at the same time as a
digio.trigger[N].wait() or tsplink.trigger[N].wait() call times out.
Resolution:
This issue has been corrected.
PR40196 Models affected:
PR40286
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The dedicated reading buffers may become corrupted by reading a buffer attribute after turning the
instrument power off, then on again.
Resolution:
This issue has been corrected.
PR40198 Models affected:
PR40399
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Aborting setting the smuX.measure.autozero attribute or aborting a smuX.contact.r(),
smuX.contact.check(), or (if smuX.measure.autozero is set to smuX.AUTOZERO_AUTO) any
smuX.measure.Y() function intermittently results in subsequent measurement commands returning
erroneous reading data.
Workaround:
Performing a smuX.reset() immediately after the abort assures correct behavior.
Resolution:
This issue has been corrected.
PR40215 Models affected:
PR40287
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
63
Version 2.1.5 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Symptom:
The basetimestamp attribute of a reading buffer created with the smuX.makebuffer() function will
be incorrect when the collecttimestamps attribute of the buffer is set to 0.
Resolution:
This issue has been corrected.
PR40217 Models affected:
PR40401
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Aborting a measurement may occasionally cause the unit to become unresponsive.
Resolution:
This issue has been corrected.
64
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.4 Release: Overview
Version 2.1.4 Release
Overview
Version 2.1.4 is a maintenance release of the Series 2600A firmware.
Enhancements
PR38762 Models affected:
PR39447
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
PR39790
PR39826
Enhancement:
When loading new firmware onto the instrument, the instrument now checks to see if the new firmware
is compatible with the hardware before allowing the old firmware to be overwritten.
PR39031 Models affected:
PR40567
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A “Legacy Mode” setting for the digital I/O was added; access this setting through the instrument front
panel. The setting is saved in nonvolatile memory, and the instrument will restart when the setting is
changed.
NOTE
Legacy Mode is not recommended for new applications. Consult your local Keithley
Instruments applications engineer or contact us by email at
[email protected] for benefits before enabling this feature.
PR39481 Models affected:
PR40587
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
TSP® Express software has been enhanced to round down calculated values of aperture (NPLC) and
source/measure delays to match the instrument's actual resolution: 0.001 for NPLC and 1 µs for
source and measure delays.
PR39643 Models affected:
PR40590
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The “High-C enable” check box in TSP Express was relabeled as “High-C available” to make it more
clear that the check box does not turn on high-capacitance mode, but only makes High-C an available
option in the Source Mode selection for each channel. A dialog box (that can be disabled if desired)
will also appear when changing the setting in this check box. Similar changes were also made for the
Auto-range check box.
PR39796 Models affected:
PR40595
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
65
Version 2.1.4 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Enhancement:
TSP Express software has been enhanced to round values for timing information for NPLC, source
delay, and measure delay when their values are entered with a precision beyond the instrument's
resolution. The values displayed are now the same resolution that the instrument actually uses. For
example, NPLC values will now be rounded to three decimal places.
Noncritical fixes
PR38673 Models affected:
PR40562
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SNMP definition on the LXI Glossary HTML page is listed twice.
Resolution:
This issue has been corrected.
PR39014 Models affected:
PR40565
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SMU will use an incorrect limit value when pulsing negative values while the
smuX.trigger.limitY attribute is set to a value other than smuX.LIMIT_AUTO.
Resolution:
This issue has been corrected.
PR39113 Models affected:
PR39957
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Calling the display.menu() function while an error message is displayed, and then pressing the
EXIT key will cause the unit to become unresponsive.
Resolution:
This issue has been corrected.
PR39160 Models affected:
PR39183
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Sending a message longer than 1024 bytes to the instrument over a VXI-11 connection will make the
instrument unresponsive.
Resolution:
The instrument will now generate a "-363, Input buffer overrun" error in response to an input message
that is too long.
66
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.4 Release: Noncritical fixes
PR39185 Models affected:
PR39192
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The VXI-11 interface generates incorrect query error messages. It generates a -420, "Query
Unterminated" error when it should generate a -410, "Query Interrupted" error, and it generates a
-410, "Query Interrupted" error when it should generate a -420, "Query Unterminated" error.
Resolution:
This issue has been corrected.
PR39186 Models affected:
PR39189
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
VXI-11 transactions that cause a "Query Unterminated" or a "Query Interrupted" error also cause the
VXI-11 transaction to report a VXI-11 timeout. The transaction should not generate a timeout error.
Resolution:
This issue has been corrected.
PR39294 Models affected:
PR39961
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When passing a reading buffer to the smuX.measure.Y() command, the command may stall
(requiring an abort action) if these conditions simultaneously exist: Measure autoranging and autozero
are disabled, and the measure count is greater than 1.
Resolution:
This issue has been corrected.
PR39394 Models affected:
PR40568
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Running any of the web applications (TSB Embedded, Virtual Front Panel, Flash Upgrade, or TSP
Express) after June 6, 2009 generates a pop-up warning with the following message: "The
application's digital signature has an error. Do you want to run the application?"
Resolution:
This issue has been corrected.
PR39400 Models affected:
PR40569
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
67
Version 2.1.4 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Symptom:
None of the web applications (TSB Embedded, Virtual Front Panel, Flash Upgrade, or TSP Express)
work in Mozilla Firefox® version 3.0.11. Running any of these web application freezes the browser.
Workaround:
Use Microsoft® Internet Explorer® or an earlier version of Firefox.
Resolution:
This issue has been corrected.
PR39466 Models affected:
PR40584
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The SMU will ignore the smuX.measure.delay value when measuring voltage only.
Workaround:
Measure current and voltage together.
Resolution:
This issue has been corrected.
PR39479 Models affected:
PR40585
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express incorrectly determines the line frequency of the instrument and always uses 60 Hz for all
calculations that are line-frequency dependent.
Resolution:
This issue has been corrected.
PR39480 Models affected:
PR40586
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using TSP Express and specifying short pulse widths, the actual pulse widths generated by the
SMU may be up to 25 µs longer than specified.
Workaround:
Reduce the NPLC, source delay, or measure delay setting.
Resolution:
The TSP Express software has been corrected to properly calculate the appropriate NPLC, source
delay, and measure delay selections so that the SMU performs at the specified timing.
NOTE
68
When using a project created by an older version of firmware, the TSP Express
software does not automatically check and correct the timing constraints. To update
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.4 Release: Noncritical fixes
these manually, open the timing dialog box and then click OK. Reopen the timing
dialog box and verify that any adjustments to the settings are satisfactory.
PR39512 Models affected:
PR39958
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When sweeping, if the first source action starts immediately after the transition from the arm layer to
the trigger layer and the first measurement of the sweep is triggered within 100 µs of the first source
complete event (or there is no measure trigger configured), the first measurement of the sweep will be
delayed. This may also extend the step width or pulse width of the first step in the sweep.
Resolution:
This issue has been corrected.
PR39513 Models affected:
PR40588
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The scripts generated by TSP Express set the smuX.measure.nplc attribute after setting the
smuX.measure.autozero attribute. The smuX.measure.nplc attribute should be set first.
Resolution:
This issue has been corrected.
PR39635 Models affected:
PR40589
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When selecting the "Single SMU sweeps and measurements" screen from the start-up screen in the
TSP Express software, the source and measure ranges for the bias SMU are set to AUTO, even
though the Auto-range check-box is not selected by default.
Resolution:
This issue has been corrected.
PR39705 Models affected:
PR40592
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Entering an invalid number of points in the sweep list editor of the TSP Express software can make the
application unresponsive.
Resolution:
This issue has been corrected.
PR39727 Models affected:
PR39960
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
69
Version 2.1.4 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Symptom:
If the smuX.arm.count attribute is set to a value other than 1, the smuX.measure.Y() function
may corrupt the instrument state, leading to erratic behavior. In this situation, it is possible that the
instrument will generate a fatal exception or become unresponsive.
Resolution:
This issue has been corrected.
PR39728 Models affected:
PR39959
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
PR40593
Symptom:
An error number 5042 may be erroneously generated after passing a reading buffer to the
smuX.measure.Y() function when all of the following conditions are true:



The append mode setting of the reading buffer is enabled.
Measure autoranging is disabled.
Autozero is disabled.
Resolution:
This issue has been corrected.
PR39732 Models affected:
PR39870
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Executing SMU commands on a remote TSP-Link® node immediately after the system goes from the
local control state (LCS) to the remote control state (RCS) when the remote SMU output is on may
cause the remote node to stop responding or generate a fatal exception.
Resolution:
This issue has been corrected.
PR39752 Models affected:
PR40594
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the measure function selected is "current,voltage," the TSP Express software may generate a
script that does not set the measure range correctly. Running the script results in a measurement
overflow error.
Resolution:
The TSP Express script generator has been corrected. The first time you load a project created with a
previous version of firmware, you must force TSP Express to generate new script code by performing
the following procedure:
1. Set the Meas. Function to either current or voltage (not “current,voltage”).
2. Next, set the Meas. Function back to current,voltage.
3. Now, set the Meas. Range.
70
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.4 Release: Noncritical fixes
Until this is procedure is completed, TSP Express will continue to use the previous
incorrectly-generated script code for that project.
PR39762 Models affected:
PR39763
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Filling the GPIB input buffer and continuing to send messages while the instrument makes more room
in the input buffer can cause the instrument to garble the input messages. This may cause the
instrument to start generating syntax errors for all subsequent input messages until a DCL bus
command is sent to the instrument.
Resolution:
This issue has been corrected.
PR39784 Models affected:
PR39962
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If the smuX.trigger.source.action attribute is set to smuX.DISABLE, subsequent sweeps may
intermittently stall after all the associated readings have been collected, requiring an abort action to
recover.
Resolution:
This issue has been corrected.
PR39795 Models affected:
PR39963
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If a reading buffer parameter rb is passed to the smuX.measure.Y() function where the value of
rb.capacity is less than the value of smuX.measure.count, the operation will correctly report a
"5039, Measure count exceeds buffer capacity" error. However, the asterisk on the display will remain
on as if the command had succeeded, and any attempt to abort the unit or the SMU channel will cause
the unit to become unresponsive.
Resolution:
This issue has been corrected.
PR39803 Models affected:
PR39806
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The display.trigger.overrun attribute is set to true when you turn the instrument power on. It
is not cleared by the reset() function.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
71
Version 2.1.4 Release: Noncritical fixes
Series 2600A Firmware Release Notes
PR39842 Models affected:
PR40596
2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express allows a voltage limit below the minimum value accepted by the instrument. When such
a script is executed, the instrument will generate an "1102, Parameter too small" error.
Resolution:
This issue has been corrected.
72
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.3 Release: Overview
Version 2.1.3 Release
Overview
Version 2.1.3 is a maintenance release of the Series 2600A firmware.
Compatibility concerns
This firmware release introduced two fixes that affect the range change timing of the source-measure unit (SMU).
This may affect tests that use low-current ranges and are sensitive to timing. See PR37782 and PR37908 in the
“Noncritical fixes” section for more details.
Noncritical fixes
PR37782 Models affected:
PR40598
2635A, 2636A
Symptom:
While in autorange mode, the first reading after changing to the 100 pA, 1 nA, 10 nA, or 100 nA range
may be incorrect (unsettled measurement).
Resolution:
The range change settling delays for these ranges have been increased. The following table lists the
additional settling delays.
Range
100 nA
10 nA
1 nA
100 pA
Analog filter
Enabled
Disabled
37 ms
37 ms
37 ms
37 ms
492 ms
172 ms
492 ms
172 ms
PR37908 Models affected:
PR37955
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
PR40600
Symptom:
When performing operations that could involve a measure range change (such as when changing the
source function), the SMU may impose unneeded extra settling delays. These delays are most
noticeable when the SMU is on one of the low-current ranges.
Resolution:
This issue has been corrected. Due to removal of inappropriate delays, test times may decrease and
requalification of tests sensitive to settling delays is recommended.
PR37965 Models affected:
PR40627
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
The instrument does not reliably respond to Address Resolution Protocol (ARP) requests, which can
lead to connection failures and to other LXI instruments using the same IP address as the instrument.
2600A-850S-FRP Rev.N / October 2015
73
Version 2.1.3 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Resolution:
This issue has been corrected.
PR37998 Models affected:
PR40628
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When the SMU must change the source function at the beginning of a sweep (call to
smuX.trigger.initiate() function), the SMU may generate an output transient at the beginning
of the first step or generate an inappropriate "1101, Parameter too big" or "5005, Value too big for
range" error message.
Resolution:
This issue has been corrected.
PR38025 Models affected:
PR38351
2602A, 2612A, 2636A
PR40601
Symptom:
If both SMUs are performing a sweep, aborting the sweep on one SMU with the smuX.abort()
command will correctly abort the sweep operation on the target SMU, but will also halt the sweep on
the other SMU. The halted SMU will remain in its sweeping state, but will not make progress on the
sweep. It will remain in this state until it is also aborted.
Resolution:
This issue has been corrected.
PR38044 Models affected:
PR40602
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Resistance measurements that are 100 kΩ and higher are always displayed on the front panel as
zero.
Resolution:
This issue has been corrected.
PR38552 Models affected:
PR40604
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Stored current measurements that were made on the 10 A range are always displayed as an overflow
indication when recalled on the front panel.
Resolution:
This issue has been corrected.
PR38713
74
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.3 Release: Noncritical fixes
Models Affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A8807
Symptom:
When running custom sweeps in TSP Express with a large number of points, the instrument reports an
error -363, "Input buffer overrun."
Resolution:
This issue has been corrected.
PR38845 Models affected:
PR40597
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Changing the voltage source level from a more negative value to a less negative value with source
autorange enabled could result in an overshoot on the output if the source range changes.
Resolution:
This issue has been corrected.
2600A-850S-FRP Rev.N / October 2015
75
Version 2.1.1 Release: Overview
Series 2600A Firmware Release Notes
Version 2.1.1 Release
Overview
Version 2.1.1 is a maintenance release of the Series 2600A firmware.
Enhancements
PR37111 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
A new "current,voltage" measurement option that measures current and voltage simultaneously has
been added to TSP Express in the measurement function list box within the sweep module for all
channel types (bias, step, and sweep).
PR37268 Models affected:
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Data can now be imported for a TSP Express custom list sweep. In the sweep module, clicking the
"Edit" button opens the Sweep List dialog box. From the Sweep List dialog box, clicking the “Import”
button opens a file dialog box from which custom sweep list data can be imported.
Additional information about how to use this feature is provided within the embedded help
documentation.
PR37173 Models affected:
PR40629
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
The TSP Express software was enhanced to support full-screen graphing. In the data module, a new
check box labeled "Maximize" has been added next to the "Export" button. When the check box is
selected, the graph is expanded to fill the window under the Data tab. This option will also expand the
table view when the display type is set to "Table" instead of "Graph."
PR37658 Models affected:
PR40609
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Enhancement:
Enhanced the digital I/O trigger control to perform a glitch free mode change when changing the
trigger mode during an active trigger pulse.
Noncritical fixes
PR37549 Models affected:
PR40605
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express displays incorrect scale values in the data module graph after the window is resized.
76
2600A-850S-FRP Rev.N / October 20155
Series 2600A Firmware Release Notes
Version 2.1.1 Release: Noncritical fixes
Resolution:
This issue has been corrected.
PR37579 Models affected:
PR40606
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When TSP Express saves data to a .csv file, there is an odd character in place of the number of
readings.
Resolution:
This issue has been corrected.
PR37591 Models affected:
PR40608
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
If the output enable on a Model 2601A or 2602A, or the hardware interlock on a Model 2611A, 2612A,
2635A, or 2636A is engaged while powering up, the corresponding bit (B11, OE) in the
status.measurement.condition register is not set as expected. The bit will not be set until the
output enable/interlock is disengaged and then re-engaged.
Resolution:
This issue has been corrected.
PR37677 Models affected:
PR40630
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
TSP Express ignores all of the measurement delay settings for the Models 2601A, 2602A, 2611A, and
2612A. It uses them incorrectly for the Models 2635A and 2636A.
Resolution:
This issue has been corrected.
PR37678 Models affected:
PR40612
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
Cannot save scripts with a one-character name from the front panel.
Resolution:
This issue has been corrected.
PR37694 Models affected:
PR40610
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
2600A-850S-FRP Rev.N / October 2015
77
Version 2.1.1 Release: Noncritical fixes
Series 2600A Firmware Release Notes
Symptom:
The instrument may incorrectly identify sweep conditions on the edge of the standard operating area
(SOA) as outside the SOA.
Resolution:
This issue has been corrected.
PR37851 Models affected:
PR40631
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When using TSP Express on a PC with a localization that uses commas in numbers, the numbers are
not interpreted correctly by TSP Express or the TSP scripting engine.
Resolution:
TSP Express now always uses the American localization.
PR37862 Models affected:
PR40611
2601A, 2602A, 2611A, 2612A, 2635A, 2636A
Symptom:
When performing a sweep or smuX.measure.Y() call lasting more than 30 seconds with a fixed
measure range and smuX.measure.autozero set to smuX.AUTOZERO_AUTO, the operation may
not terminate. Subsequently, the unit becomes unresponsive requiring a power cycle.
Resolution:
This issue has been corrected.
78
2600A-850S-FRP Rev.N / October 20155
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