Agilent Technologies ESA Series User's/Programmer's Reference page 217

For example, to enable bit 9 and bit 3 so that whenever either of those bits is set to 1, the Questionable
Status Summary bit of the Status Byte Register will be set to 1, send the command
:STAT:QUES:ENAB 520 (512 + 8). The command :STATus:QUEStionable:ENABle? returns
the decimal value of the sum of the bits previously enabled with the
:STATus:QUEStionable:ENABle <num> command.
Figure 4-11 Questionable Status Event Enable Register
Bit descriptions in the Status Questionable Condition Register are given in the following table.
Bit
Chapter 4
Use Status Registers to Determine the State of Analyzer Events and Conditions
Decimal Description
Value
0 1 Reserved: This bit is not used by the analyzer, but are for
future use with other Agilent products.
1 2 Reserved: This bit is not used by the analyzer, but are for
future use with other Agilent products.
2 4 Reserved: This bit is not used by the analyzer, but are for
future use with other Agilent products.
3 8 POWer Summary: This is the summary bit for the
Questionable Power Status Register.
4 16 Reserved: This bit is not used by the analyzer, but are for
future use with other Agilent products.
5 32 FREQuency Summary: This is the summary bit for the
Questionable Frequency Status Register.
6 64 Reserved: This bit is not used by the analyzer, but are for
future use with other Agilent products.
7 128 Reserved: This bit is not used by the analyzer, but are for
future use with other Agilent products.
Status Registers
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