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82 Chapter 2
Status Registers
Use Status Registers to Determine the State of Analyzer Events and Conditions
Questionable Status Frequency Condition and
Event Enable Registers
The Questionable Status Frequency condition register continuously monitors
output frequency status of the analyzer. Condition registers are read-only. To query
the condition register, send the command
:STATus:QUEStionable:FREQuency:CONDition? The response will be
the decimal sum of the bits which are set to 1.
The negative and positive transition filters specify 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
command :STATus:QUEStionable:FREQuency
:NTRansition <num> (negative transition) or :STATus:QUEStionable
:FREQuency:PTRansition <num> (positive transition) where <num> is the
sum of the decimal values of the bits you want to enable.
The Questionable Status Frequency 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 will clear the content of
that register. To query the event register, send the command
:STATus:QUEStionable:FREQuency
[:EVENt]?
See “Questionable Status Event Enable Register” on page 77 for an explanation of
how to set the summary bit using the event enable register. In this case, use the
command :STATus:QUEStionable:FREQ:ENABle <num>.