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Section 7: Command reference
Model 2651A High Power System SourceMeter® Instrument Reference Manual
7-280
2651A-901-01 Rev. A / March 2011
Bit Value
Description
B0
status.operation.instrument.smu
X
.CALIBRATING
status.operation.instrument.smu
X
.CAL
Set bit indicates that
smu
X
is unlocked for
calibration.
Bit B0 decimal value: 1
B1-B2 Not
used
Not applicable.
B3
status.operation.instrument.smu
X
.SWEEPING
status.operation.instrument.smu
X
.SWE
Set bit indicates that
smu
X
is sweeping.
Bit B3 decimal value: 8
B4
status.operation.instrument.smu
X
.MEASURING
status.operation.instrument.smu
X
.MEAS
Bit will be set when taking
an overlapped
measurement, but it will
not set when taking a
normal synchronous
measurement.
Bit B4 decimal value: 16
B5-B9 Not
used
Not applicable.
B10
status.operation.instrument.smu
X
.TRIGGER_OVERRUN
status.operation.instrument.smu
X
.TRGOVR
Set bit indicates an
enabled bit has been set
in the operation status
smu X trigger overrun
event register.
Bit B10 decimal value:
1024
B11-B15 Not
used
Not applicable.
As an example, to set bit B0 of the operation status SMU A summary enable register, set
status.operation.instrument.smua.enable = status.operation.instrument.smua.CAL
.
In addition to the above constants,
operationRegister
can be set to the numeric equivalent of the bit to set.
To set more than one bit of the register, set
operationRegister
to the sum of their decimal weights. For
example, to set bits B0 and B10, set
operationRegister
to 1025 (which is the sum of 1 + 1024).
Bit
B7 B6 B5 B4 B3 B2 B1 B0
Binary
value
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
Decimal
128 64 32 16 8 4 2 1
Weights (2
7
) (2
6
) (2
5
) (2
4
) (2
3
) (2
2
) (2
1
) (2
0
)
Bit
B15 B14 B13 B12 B11 B10 B9 B8
Binary
value
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
Decimal
32,768 16,384 8,192 4,096 2,048 1024 512 256
Weights (2
15
) (2
14
) (2
13
) (2
12
) (2
11
) (2
10
) (2
9
) (2
8
)
Example
status.operation.instrument.smua.enable =
status.operation.instrument.smua.MEAS
Sets the MEAS bit of the operation
status SMU A summary enable
register using a constant.
Also see
status.operation.instrument.smuX.trigger_overrrun.*