Condition Register; Transition Filter - HP 53131A/132A 225 MHz Programming Manual

Chapter 3 Programming Your Universal Counter for Remote Operation
Status Reporting

Condition Register

A condition register continuously monitors the hardware and firmware status of
the Counter. There is no latching or buffering for this register; it is updated in real
time. Reading a condition register does not change its contents.
To read the condition registers use:
:STATus:OPERation:CONDition?
:STATus:QUEStionable:CONDition?

Transition Filter

A transition filter specifies the transition criteria for setting event bits TRUE.
When the transition filter specifies a positive transition, the event becomes TRUE
when its associated condition makes a FALSE to TRUE transition only.
When the transition filter specifies a negative transition, the event becomes TRUE
when its associated condition makes a TRUE to FALSE transition only.
When the transition filter specifies either a positive or a negative transition, the
event becomes TRUE when its associated condition makes either a FALSE to
TRUE or a TRUE to FALSE transition.
A transition filter is defined by a positive and negative transition filter register.
Table 3-6 describes how the transition filter registers define the transition criteria
for setting an event bit TRUE.
Table 3-6. Transition Filter Definition
Positive Negative
Transition Transition
Filter Bit Filter Bit
TRUE FALSE
FALSE TRUE
TRUE TRUE
FALSE FALSE
3-28
Transition Which Causes the
Event-Bit to be set TRUE
positive transition
negative transition
either a positive or negative transition
neither transition (event reporting is disabled)
Programming Guide