Agilent Technologies ESA-E Series Programmer's Manual page 38

Status Registers
Use Status Registers to Determine the State of Analyzer Events and Condition s
Refer to the right-hand part of the STATus : QUEStionable register
while reading the following register descriptions .
Condition
Register A condition register continuously monitors th e
hardware and firmware status of the analyzer . There is
no latching or buffering for a condition register .
A negative transition filter specifies the bits in the
condition register that will set corresponding bits in th e
event register when the condition bit changes from
1toO .
A positive transition filter specifies the bits in the
condition register that will set corresponding bits in th e
event register when the condition bit changes from
0 to 1 .
Event
Register
An event register latches transition events from th e
condition register as specified by the positive an d
negative transition filters. Bits in the event register are
latched, and once set, they remain set until cleared by
either querying the register contents or sending th e
*CLS command.
An event enable register specifies the bits in the even t
register that can generate a summary bit . Summary
bits are, in turn, used by the status byte register .
Negative
Transition
Filter
Positive
Transition
Filter
Even t
Enable
Register
2-4
Chapter2