Remote Control Basics
R&S
®
NRPxxTWG
109
User Manual 1178.8371.02 ─ 04
cant bit, is set to 0 in all registers, thus preventing problems some controllers have with
the processing of unsigned integers.
Figure 9-2: Standard SCPI status register
CONDition status register part
The five parts of a SCPI register have different properties and functions:
The
CONDition
part is written into directly by the hardware or the sum bit of the next
lower register. Its contents reflect the current instrument status. This register part can
only be read, but not written into or cleared. Its contents are not affected by reading.
PTRansition / NTRansition status register part
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
Positive 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 part can be written into and read as required. Its contents are not affected by
reading.
The
Negative 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 written into and read as required. Its contents are not affected by
reading.
Status Reporting System
