Fluke Norma 4000 User Manual page 28

Remote Control
Users Guide
CONDition part
PTRansition part The Positive Transition part acts as an edge detector. If a bit of the
NTRansition part The Negative Transition part likewise acts as an edge detector. If a bit
EVENt part
ENABle part
Sum bit
2-4
The CONDition part is directly written to by the hardware or the sum
bit of the next lower register. Its contents reflect the current instrument
status. This register part can be read only but not written to or cleared.
Reading does not affect the contents.
CONDition part changes from 0 to 1, the status of the associated PTR
bit determines whether the EVENt bit is set to 1.
PTR bit = 1: the EVENt bit is set.
PTR bit = 0: the EVENt bit is not set.
This part can be written to and read. Reading does not affect its
contents.
of the CONDition part changes from 1 to 0, the status of the
associated NTR bit determines whether the EVENt bit is set to 1.
NTR bit = 1: the EVENt bit is set.
NTR bit = 0: the EVENt bit is not set.
This part can be written to and read. Reading does not affect its
contents.
With the above two edge register parts, the user can define what status
transition of the CONDition part (none, 0 to 1, 1 to 0 or both) is to be
stored in the EVENt part.
The EVENt part indicates whether an event has occurred since it was
read the last time; it is the memory of the CONDition part. It indicates
only those events that were passed on by the edge filters. The EVENt
part is continuously updated by the instrument. This part can be read
only. Upon reading, its contents is set to zero. In linguistic usage, the
EVENt part is often treated as equivalent to the complete register.
The ENABle part determines whether the associated EVENt bit
contributes to the sum bit (see below). Each bit of the EVENt part is
ANDed with the associated ENABle bit (symbol &). The results of all
logical operations of this part are passed on to the sum bit via an OR
function (symbol +).
ENABle-Bit = 0: the associated EVENt bit does not contribute to the
sum bit.
ENABle-Bit = 1: if the associated EVENT bit is 1, the sum bit is set to
1 as well.
This part can be written to and read. Reading does not affect its
contents.
As mentioned above, the sum bit is obtained from the EVENt part and
the ENABle part for each register. The result is entered as a bit of the
CONDition part into the next higher register.
The instrument automatically generates a sum bit for each register. It
is ensured that an event, for example a PLL that has not locked, can
produce a service request throughout all hierarchical levels.