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2600AS-901-01 Rev. B / September 2008
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C-21
Series 2600A System SourceMeter® Instruments Reference Manual
Appendix C: Status Model
Measurement Event Registers
As shown in
, there are eight register sets associated with Measurement Event Status.
Commands are summarized in the
. Keep in mind that bits can also be set by
using numeric parameter values. For details, see
Programming enable and transition registers
.
For example, either of the following commands will set the VOLTAGE_LIMIT enable bit:
status.measurement.enable = status.measurement.VOLTAGE_LIMIT
status.measurement.enable = 1
When reading a register, a numeric value is returned. The binary equivalent of this value indicates
which bits in the register are set. For details, see
. For example, the following
command will read the measurement enable register:
print(status.measurement.enable)
This register set feeds to bit B0 (MSB) of the Status Byte. The bits used in the Measurement Event
Registers are described as follows:
•
Bit B0, Voltage Limit (VLMT):
Set bit indicates that the voltage limit was exceeded. This bit
will be updated only when (1) a measurement is taken or (2) the
smuX.source.compliance
command is invoked.
•
Bit B1, Current Limit (ILMT):
Set bit indicates that the current limit was exceeded. This bit
will be updated only when (1) a measurement is taken or (2) the
smuX.source.compliance
command is invoked.
•
Bit B7, Reading Overflow (ROF):
Set bit indicates that an overflow reading has been
detected.
•
Bit B8, Buffer Available (BAV):
Set bit indicates that there is at least one reading stored in
either or both of the nonvolatile reading buffers.
•
Bit B11, Output Enable (OE):
Set bit indicates that output enable has been asserted.
•
Bit B13, Instrument Summary (INST):
Set bit indicates that a bit in the measurement
instrument summary register is set.
For more information on the Measurement Event Registers, refer to
and the
charts in this appendix.