146 Chapter 3
Programming the Status Register System
Status Groups
Data Questionable Modulation Event Register
The Data Questionable Modulation Event Register latches transition events from the condition register as
specified by the transition filters. Event registers are destructive read-only: reading data from an event
register clears the contents of that register.
Data Questionable Modulation Event Enable Register
The Data Questionable Modulation Event Enable Register lets you choose which bits in the Data
Questionable Modulation Event Register set the summary bit (bit 7 of the Data Questionable Condition
Register) to 1.
Query: STATus:QUEStionable:MODulation[:EVENt]?
Command:
STATus:QUEStionable:MODulation:ENABle <value> command where <value> is
the sum of the decimal values of the bits you want to enable.
Example: Enable bit 9 and bit 3 so that whenever either of those bits is set to 1, the Data Questionable
Modulation summary bit of the Data Questionable Condition Register is set to 1: send the
command STAT:QUES:MOD:ENAB 520 (512 + 8)
Query: STATus:QUEStionable:MODulation:ENABle?
Response: Decimal value of the sum of the bits previously enabled with the
STATus:QUEStionable:MODulation:ENABle <value> command.
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