HP 53131A/132A 225 MHz Programming Manual page 278

Chapter 4 Command Reference
:STATus Subsystem
:STATus:QUEStionable[:EVENt]?
Queries the status of the Questionable Data Event Status Register.
The Questionable Data Event Status Register captures changes in conditions by
having each event bit correspond to a specific condition bit in the Questionable
Data Condition Status Register. An event becomes TRUE when the associated
condition makes the transition specified by the transition filters. The event bits,
once set, are "sticky." That is, they cannot be cleared, even if they do not reflect
the current status of a related condition, until they are read.
The Questionable Data Event Status Register is cleared by *CLS, by
:STAT:QUES[:EVEN]?, and at power-on.
Query Response
:STATus:QUEStionable:NTRansition
<non-decimal numeric> | <NRf>
Sets or the negative transition filter for the Questionable Data status reporting
structure.
The parameter and query response value, when rounded to an integer value and
expressed in base 2 (binary), represents the bit values of the negative transition
filter. The value of unused bits is zero when queried and ignored when set.
A TRUE bit (in the negative transition filter) specifies that a negative (TRUE to
FALSE) transition of the corresponding bit in the Questionable Data Condition
Status Register generates the corresponding event in the Questionable Data Event
Status Register.
Range
The range of the <non-decimal numeric> or <NRf> parameter is
0 to 65,535.
Query Response
Numeric data transferred as ASCII bytes in <NR1> format.
Comments
4-112
Numeric data transferred as ASCII bytes in <NR1> format.
Range is 0 to 65,535.
The query response value is an integer formed by the binary-weighting of bits.
The value of unused bits is zero.
At power-on and :STAT:PRES, the negative transition filter is preset such
that each bit is a 0 (FALSE).
This value is unaffected by *RST and save/recall.
Programming Guide