Agilent Technologies 8163A Programming Manual page 28

Introduction to Programming
28
The structures of the Operational and Questionable Status Systems are
similar. Figure 4 describe how the Questionable Status Bit (QSB) and
the Operational Status Bit (OSB) of the Status Byte Register are
determined.
Figure 3 The Registers and Filters for a Node
The Operational/Questionable Slot Status Event Register
(OSSER/QSSER) contains the status of a particular module slot. A bit
changes from 0 → 1 when an event occurs, for example, when a laser is
switched on. For details of the function of each bit of these registers, see
"Operation/Questionable Status Summary Register" on page 32 and
"Operation/Questionable Status Summary Register" on page 32.
The Operational/Questionable Slot Enable Status Mask
(OSESM/QSESM) allows you to choose the events for each module slot
that may affect the Operational/Questionable Status Event Register (see
below). If you set a bit of the OSESM/QSESM to zero, the occurence of
the corresponding event for this particular module slot cannot affect the
Operational/Questionable Status Event Register. The default is for all the
bits of the OSESM/QSESM to be set to 0.
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System,
& Agilent 8166A Lightwave Multichannel System, Third Edition
Enable Registers
OR
Event Registers
A positive transition in the condition
register, when a bit changes from 0 → 1,
1 1 1 1 1
causes the corresponding bit of the
corresponding event register
to change from 0 → 1.
Condition Registers
The Status Model
To the
Condition Register
of the Next Node