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Model 2651A High Power System SourceMeter® Instrument Reference Manual
Bit
Value
B0
status.measurement.VOLTAGE_LIMIT
status.measurement.VLMT
B1
status.measurement.CURRENT_LIMIT
status.measurement.ILMT
B2-B6
Not used
B7
status.measurement.READING_OVERFLOW
status.measurement.ROF
B8
status.measurement.BUFFER_AVAILABLE
status.measurement.BAV
B9-B10
Not used
B11
status.measurement.OUTPUT_ENABLE
status.measurement.OE
B12
Not used
B13
status.measurement.INSTRUMENT_SUMMARY
status.measurement.INST
B14-B15
Not used
As an example, to set bit B8 of the measurement event enable register, set status.measurement.enable =
status.measurement.BAV.
In addition to the above constants, measurementRegister can be set to the decimal equivalent of the bit to
set. To set more than one bit of the register, set measurementRegister to the sum of their decimal weights.
For example, to set bits B1 and B8, set measurementRegister to 258 (which is the sum of 2 + 256).
Bit
Binary value
Decimal
Weights
Bit
Binary value
Decimal
Weights
Example
status.measurement.enable = status.measurement.BAV
Also see
Measurement Event Registers
2651A-901-01 Rev. A / March 2011
B7
B6
B5
0/1
0/1
0/1
128
64
32
7
6
5
(2
)
(2
)
(2
)
B15
B14
B13
0/1
0/1
0/1
32,768
16,384
8,192
15
14
13
(2
)
(2
)
(2
)
(on page E-23)
Section 7: Command reference
Description
Set bit is a summary of the
status.measurement.voltage_limit register.
Bit B0 decimal value: 1
Set bit is a summary of the
status.measurement.current_limit register.
Bit B1 decimal value: 2
Not applicable
Set bit is a summary of the
status.measurement.reading_overflow
register.
Bit B7 decimal value: 128
Set bit is a summary of the
status.measurement.buffer_available
register.
Bit B8 decimal value: 256
Not applicable
Set bit indicates that output enable has been
asserted.
Bit B11 decimal value: 2048
Not applicable
Set bit indicates that a bit in the measurement
instrument summary register is set.
Bit B13 decimal value: 8192
Not applicable
B4
B3
B2
0/1
0/1
0/1
16
8
4
4
3
2
(2
)
(2
)
(2
)
B12
B11
B10
0/1
0/1
0/1
4,096
2,048
1024
12
11
10
(2
)
(2
)
(2
)
Sets the BAV bit of the
measurement event enable register.
B1
B0
0/1
0/1
2
1
1
0
(2
)
(2
)
B9
B8
0/1
0/1
512
256
9
8
(2
)
(2
)
7-253
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