Remote Commands
R&S
®
Cable Rider ZPH
525
User Manual 1321.0950.02 ─ 07
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Application of the Status Reporting Systems
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Reset Values of the Status Reporting System
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Remote Commands of the Status Reporting System
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14.6.12.1
Structure of an SCPI Status Register
Each standard SCPI register consists of 5 parts which each have a width of 16 bits and
have different functions. The individual bits are independent of each other, i.e. each
hardware status is assigned a bit number that applies to all five parts. For example, bit
0 of the STATus:OPERation register is assigned to the calibration status of the R&S
Cable Rider ZPH. Bit 15 (the 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.
Figure 14-6: The status-register model
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 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 part also acts as an edge detector. When a bit of the CONDi-
tion 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.
Remote Control - Commands
