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Model 2651A High Power System SourceMeter® Instrument Reference Manual
Bit
Value
status.MEASUREMENT_SUMMARY_BIT
B0
status.MSB
Set summary bit indicates that an enabled event in the Measurement Event Register
has occurred.
Bit B0 decimal value: 1
status.SYSTEM_SUMMARY_BIT
B1
status.SSB
Set summary bit indicates that an enabled event in the System Summary Register has occurred.
Bit B1 decimal value: 2
status.ERROR_AVAILABLE
B2
status.EAV
Set summary bit indicates that an error or status message is present in the error queue.
Bit B2 decimal value: 4
status.QUESTIONABLE_SUMMARY_BIT
B3
status.QSB
Set summary bit indicates that an enabled event in the Questionable Status Register
has occurred.
Bit B3 decimal value: 8
status.MESSAGE_AVAILABLE
B4
status.MAV
Set summary bit indicates that a response message is present in the output queue.
Bit B4 decimal value: 16
status.EVENT_SUMMARY_BIT
B5
status.ESB
Set summary bit indicates that an enabled event in the Standard Event Status Register
has occurred.
Bit B5 decimal value: 32
Not used
B6
status.OPERATION_SUMMARY_BIT
B7
status.OSB
Set summary bit indicates that an enabled event in the Operation Status Register has occurred.
Bit B7 decimal value: 128
As an example, to set bit B0 of the service request enable register, set status.request_enable =
status.MSB.
In addition to the above values, requestSRQEnableRegister can be set to the numeric equivalent
of the bit to set. To set more than one bit of the register, set requestSRQEnableRegister to the
sum of their decimal weights. For example, to set bits B0 and B7, set
requestSRQEnableRegister to 129 (1 + 128).
Bit
Binary value
Decimal
Weights
2651A-901-01 Rev. C October 2021
B7
B6
B5
0/1
0/1
0/1
128
64
32
7
6
5
(2
)
(2
)
(2
)
Section 7: TSP command reference
B4
B3
B2
0/1
0/1
0/1
16
8
4
4
3
2
(2
)
(2
)
(2
)
B1
B0
0/1
0/1
2
1
1
0
(2
)
(2
)
7-377
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