The Status Model; Status Registers - Agilent Technologies 8163A Programming Manual

The Status Model

Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System, & Agilent 8166A Lightwave Multichannel
System, Third Edition
The Status Model

Status Registers

Each node of the status circuitry has three registers:
• A condition register (CONDition), which contains the current status.
This register is updated continuously. It is not changed by having its
contents read.
• The event register (EVENt), which contains details of any positive
transitions in the corresponding condition register, that is, when a bit
changes from 0 → 1. The contents of this register are cleared when it
is read. The contents of any higher-level registers are affected with
regard to the appropriate bit.
• The enable register (ENABle), which enables changes in the event
register to affect the next stage of registers.
N O T E
The event register is the only kind of register that can affect the next
stage of registers.
Introduction to Programming
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