Technical data
The condition register continuously monitors the hardware and firmware status
of the instrument. There is no latching or buffering for a condition register. It
is updated in real time.
This register is read by the CONDition? SCPI commands.
• Negative Transition
The negative transition register specifies the bits in the condition register that
will set corresponding bits in the event register when the condition bit changes
from 1 to 0.
This register is set and read by the NTRAnsition[?] SCPI commands.
• Positive Transition
A positive transition register specifies the bits in the condition register that will
set corresponding bits in the event register when the condition bit changes
from 0 to 1.
• Event
An event register latches transition events from the condition register as
specified by the positive and 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 the *CLS command.
• Event Enable
An enable register specifies the bits in the event register that can generate a
summary bit. Summary bits are, in turn, used by the next higher register.
The registers work together as follows:
1
The Condition Register corresponds to a condition on the hardware or in the
software. If the monitored condition is present, the corresponding bit is high.
2
The Transition Registers monitor changes in the Condition Register. If the
Positive Transition Register is configured to watch for a condition, when this
condition occurs, and the bit in the Condition Register goes high, the Positive
Transition Register passes this event to the Event Register.
3
If this bit is enabled in the Enable Event Register, a summary bit is generated
in the next higher register. For the higher register, this is the Condition Register,
and the event is handled the same way as described here.
N O T E
The transition and enable registers for the Failure Status register (and its
subregisters) cannot be modified.
3 Recommended Programming Techniques
26 Agilent J-BERT N4903B High-Performance Serial BERT