Agilent Technologies 4339B, Руководство по эксплуатации

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4339B Status Reporting Structure
Standard Operation Status Group
The 4339B provides two Standard Operation Status groups | Operation Status Register
group and Questionable Status Register group | which can be accessed using the STATus
subsystem commands . (Refer to STATus subsystem in \Command Reference ".) This group is
used in advanced programming. The individual bit assignment of these registers are given in
\Operation Status Register" and \Questionable Status Register" later in this section.
Each group includes a condition register , an event register , and an enable resister . (Illustrated
in Figure 5-5.)
The condition register reects the internal states of the 4339B. So each time the 4339B's
condition is changed, its condition bit is changed from \0" to \1", or from \1" to \0".
The event register's bits correspond to the condition register's bits . A transition lter reports
an event to the event register , when a condition register bit changes from \1" to \0" for
all bits , except for bit no . 8 and 9. F or bit no .'s 8 and 9, reporting occurs when a condition
register bit changes from \0" to \1".
Note
After the event register's bits are set to 1 , the bits are kept at 1 before reading
or clearing them.
The enable register enables the corresponding bit in the event register to set the status
summary bit, bit 7 or bit 3, of the Status Byte Register .
Figure 5-5. Standard Operation Status Group Structure
GPIB Reference 5-43