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Status Reporting System
R&S
®
RTC1000
349User Manual 1335.7352.02 ─ 04
– 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.
●
EVENt
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
transition filters. 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.
●
ENABle
The ENABle part determines whether the associated EVENt bit contributes to the
sum bit (see below). Each bit of the EVENt part is "ANDed" with the associated
ENABle bit (symbol '&'). The results of all logical operations of this part are passed
on to the sum bit via an "OR" function (symbol '+').
ENABle bit = 0: the associated EVENt bit does not contribute to the sum bit
ENABle bit = 1: if the associated EVENt bit is "1", the sum bit is set to "1" as well.
This part can be written into and read by the user as required. Its contents are not
affected by reading.
Sum bit
The sum bit is obtained from the EVENt and ENABle part for each register. The result
is then entered into a bit of the CONDition part of the higher-order register.
The instrument automatically generates the sum bit for each register. Thus an event
can lead to a service request throughout all levels of the hierarchy.
C.2 Hierarchy of status registers
●
STB, SRE
The STatus Byte (STB) register and its associated mask register Service Request
Enable (SRE) form the highest level of the status reporting system. The STB pro-
vides a rough overview of the instrument status, collecting the information of the
lower-level registers.
●
ESR, SCPI registers
The STB receives its information from the following registers:
Hierarchy of status registers
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