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3
Status Registers
Overview
What are Status Registers
20
When you are programming the instrument you may need to
monitor instrument status to check for error conditions or
monitor changes. You need to determine the state of certain
instrument events/conditions by programming the status
register system.
IEEE common commands (those beginning with *) access the
higher- level summary registers. To access the information
from specific registers you would use the STATus commands.
The STATus subsystem remote commands set and query the
status hardware registers. This system of registers monitors
various events and conditions in the instrument. Software
written to control the instrument may need to monitor some
of these events and conditions.
The status system contains multiple registers that are
arranged in a hierarchical order. The lower- level status
registers propagate their data to the higher- level registers in
the data structures by means of summary bits. The status
byte register is at the top of the hierarchy and contains
general status information for the instrument's events and
conditions. All other individual registers are used to
determine the specific events or conditions.
Each register set is made up of five registers:
Condition
It reports the real- time state of the signals monitored by
Register
this register set. There is no latching or buffering for a
condition register.
Positive
This filter register controls which signals will set a bit in the
Transition
event register when the signal makes a low to high transition
Register
(when the condition bit changes from 0 to 1).
N9340B Programmer's Guide
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