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Status Reporting System
R&S
®
RTB2000
474User Manual 1333.1611.02 ─ 03
C Status Reporting System
The status reporting system stores all information on the current operating state of the
instrument, and on errors which have occurred. This information is stored in the status
registers and in the error queue. Both can be queried via GPIB bus or LAN interface
(STATus... commands).
C.1 Structure of a SCPI Status Register
Each standard SCPI register consists of 5 parts. Each part has a width of 16 bits and
has different functions. The individual bits are independent of each other, i.e. each
hardware status is assigned a bit number which is valid for all five parts. 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 integers.
Figure C-1: The status-register model
Description of the five status register parts
The five parts of a SCPI register have different properties and functions:
●
CONDition
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
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.
Structure of a SCPI Status Register
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