Keithley 2600B - Bit B8 Decimal Value: 256; Not Applicable

Section
7: TSP command reference Series 2600B System SourceMeter® Instrument
Reference Manual
7-336 2600BS-901-01 Rev. C / August 2016
Details
These attributes are used to read or write to the questionable status instrument SMU X summary
registers. Reading a status register returns a value. The binary equivalent of the returned value
indicates which register bits are set. The least significant bit of the binary number is bit B0, and the
most significant bit is bit B15. For example, if a value of 7.68000e+02 (which is 768) is read as the
value of the condition register, the binary equivalent is 0000 0011 0000 0000. This value indicates
that bit B8 and bit B9 are set.
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
**
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*
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
* Least significant bit
** Most significant bit
For information about .condition, .enable, .event, .ntr, and .ptr registers, refer to Status register set
contents (on page E-1) and Enable and transition registers (on page E-19). The individual bits of this
register are defined in the following table.
Bit Value Description
B0-B7
Not used
Not applicable.
B8
status.questionable.instrument.smuX.CALIBRATION
status.questionable.instrument.smuX.CAL
Set bit indicates that the
calibration constants
stored in nonvolatile
memory were corrupted
and could not be loaded
when the instrument
powered up.
Bit B8 decimal value: 256
B9
status.questionable.instrument.smuX.UNSTABLE_OUTPUT
status.questionable.instrument.smuX.UO
Set bit indicates that an
unstable output condition
was detected.
Bit B9 decimal value: 512
B10-B11
Not used
Not applicable
B12
status.questionable.instrument.smuX.OVER_TEMPERATURE
status.questionable.instrument.smuX.OTEMP
Set bit indicates that an
over temperature condition
was detected.
Bit B12 decimal value:
4,096
B13-B15
Not used
Not applicable.
As an example, to set bit B8 of the questionable status SMU A summary enable register, set
status.questionable.instrument.smua.enable =
status.questionable.instrument.smua.CAL.
In addition to the above constants, questionableRegister can be set to the numeric equivalent of
the bit to set. To set more than one bit of the register, set questionableRegister to the sum of
their decimal weights. For example, to set bits B8 and B9, set questionableRegister to 768
(which is the sum of 256 + 512).