Programming Guide – 57
Operation and Questionable Event Registers
Event registers reflect changes in the conditions of the attenuator. Each bit in the operation
event register and the questionable event register is associated with a bit in the corresponding
condition register. Depending on the values of the positive transition register and the negative
transition register, a bit in the event register can be set when the associated bit in the condition
register changes from 0 to 1, from 1 to 0, or both. If both the positive transition and negative
transition bits are set to 0, the event register bit is not set on either transition.
Operation Event Register
Read with
STATus:OPERation:EVENT? query
Written to with
Cannot be written to
Cleared by
*CLS common command
Questionable Event Register
Read with
STATus:QUEStionable:EVENT? query
Written to with
Cannot be written to
Cleared by
Power-on
*CLS common command
Operation and Questionable Event Enable Registers
The event enable registers determine which event bits in the associated event register cause
the summary message bit in the status byte register to be set. If any event bit in the event
register is set while its associated bit in the event enable register is also set, the summary
message bit is set to true.
Operation Event Enable Register
Read with
STATus:OPERation:ENABle? query
Written to with
STATus:OPERation:ENABle command
Cleared by
Power-on
Questionable Event Enable Register
Read with
STATus:QUEStionable:ENABle? query
Written to with
STATus:QUEStionable:ENABle command
Cleared by
Power-on
Operation and Condition Positive Transition Registers
If a bit in the positive transition register is set, a positive transition (a transition from 0 to 1) in
the associated bit in the condition register sets the associated bit in the event register.
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