Remote Control
R&S
®
FPC
342User Manual 1178.4130.02 ─ 07
CONDition part12131415 3 2 1 0
PTRansition part12131415 3 2 1 0
NTRansition part12131415 3 2 1 0
EVENt part12131415 3 2 1 0
ENABle part12131415 3 2 1 0
& & & & & & & & & & & & & &
+
Sum bit
to higher order register
& = logical AND
+ = logical OR
of all bits
Figure 19-5: Model of the status register
CONDition part
The CONDition part is directly written into by the hardware or the sum bit of the next
lower register. Its contents reflects the current instrument status. This register part can
only be read, but not written into or cleared. Its contents is not affected by reading.
PTRansition part
The Positive-TRansition (PTR) part acts as an edge detector. When a bit of the
CONDition part is changed from 0 to 1, the associated PTR bit decides 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 into and read at will. Its contents is not affected by reading.
NTRansition part
The Negative-TRansition (NTR) part also acts as an edge detector. When a bit of
the CONDition part is changed from 1 to 0, the associated NTR bit decides 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 into and read at will. Its contents is not affected by reading.
With these two edge register parts the user can define which state transition of the
condition part (none, 0 to 1, 1 to 0 or both) is stored in the EVENt part.
EVENt part
The EVENt part indicates whether an event has occurred since the last reading, it is
the "memory" of the condition part. It only indicates events passed on by the edge fil-
ters. It is permanently updated by the instrument. This part can only be read by the
user. Reading the register clears it. This part is often equated with the entire register.
Status Reporting System
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