Status:questionable Registers - Agilent Technologies ESA Series User's/Programmer's Reference

Status Registers
Use Status Registers to Determine the State of Analyzer Events and Conditions
returned.
The transition filter specifies which types of bit state changes in the condition register will set
corresponding bits in the event register. The changes may be positive (from 0 to 1) or negative (from 1 to
0). Send the :STATus:OPERation:NTRansition <num> (negative transition) command or the
:STATus:OPERation:PTRansition <num> (positive transition) command (where <num> is the
sum of the decimal values of the bits you want to enable).
The STATus:OPERation event register latches transition events from the condition register as specified
by the transition filters. Event registers are destructive read-only data. Reading data from an event
register will clear the content of that register. To query the event register, send the
:STATus:OPERation:[:EVENt]? command.
The STATus:OPERation event enable register lets you choose the bits that will set the operation status
summary bit (bit 7) of the status byte register to 1. Send the :STATus:OPERation:ENABle <num>
command where <num> is the sum of the decimal values of the bits you want to enable.
For example, to enable bit 9 and bit 3 (so that whenever either bit 9 or 3 is set to 1, the operation status
summary bit of the status byte register will be set to 1), send the :STATus:OPERation:ENABle 520
(512 + 8) command. The :STATus:OPERation:ENABle? command returns the decimal value of the
sum of the bits previously enabled with the :STATus:OPERation:ENABle <num> command.

STATus:QUEStionable Registers

STATus:QUEStionable registers monitor the overall analyzer condition. They are accessed with the
:STATus:OPERation and :STATus:QUEStionable commands in the :STATus command
subsystem.
The STATus:QUEStionable registers also monitor the analyzer to see if there are any questionable events
that occurred. These registers look for anything that may cause an error or that may induce a faulty
measurement. Signs of a faulty measurement include the following:
• hardware problems
• out of calibration situations
• unusual signals
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