Status - HP E1419A User Manual

STATus

The STATus subsystem communicates with the SCPI defined Operation and
Questionable Data status register sets. Each is comprised of a Condition register, a
set of Positive and Negative Transition Filter registers, an Event register, and an
Enable register. Condition registers allow you to view the current real-time states of
their status signal inputs (signal states are not latched). The Positive and Negative
Transition Filter registers allow you to control the polarity of change from the
Condition registers that will set Event register bits. Event registers contain latched
representations of signal transition events from their Condition register. Querying an
Event register reads and then clears its contents, making it ready to record further
event transitions from its Condition register. Enable registers are used to select
which signals from an Event register will be logically ORed together to form a
summary bit in the Status Byte Summary register. Setting a bit to one in an Enable
register enables the corresponding bit from its Event register.
NOTE
For a complete discussion and more detailed status illustration see "Using the Status
System" on page 3-90.
Figure 6-4 General Status Register Organization
296 HP E1419 Command Reference Chapter 6