R&S
®
CMW 500 Remote Control
Status Reporting System
Operating Manual 1202.3986.32 – 03 104
most significant bit) is set to zero for all parts. Thus the contents of the register parts
can be processed by the controller as positive integer.
5.6.2.1 Description of the five status register parts
The five parts of an SCPI register have different properties and function:
CONDition
The CONDition part is permanently overwritten by the hardware or the sum bit of the
next lower register. Its contents always reflect the current instrument state.
This register part can only be read, but not overwritten or cleared. Reading the
CONDition register is nondestructive.
PTRansition
The two transition register parts define which state transition of the condition part
(none, 0 to 1, 1 to 0 or both) is stored in the EVENt part.
The P
ositive TRansition part acts as a transition filter. 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 status register part can be overwritten and read at will. Reading the PTRansition
register is nondestructive.
NTRansition
The N
egative TRansition part also acts as a transition filter. 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 overwritten and read at will. Reading the PTRansition register is
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