Remote Control
R&S
®
CMW500
169
User Manual 1173.9463.02 ─ 02
●
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 non-
destructive.
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 (cf. below). Each bit of the EVENt part is ANDed with the associated ENABle bit (sym-
bol '&'). The results of all logical operations of this part are passed on to the sum bit via
an OR function (symbol '+').
●
ENAB bit = 0: The associated EVENt bit does not contribute to the sum bit.
●
ENAB bit = 1: If the associated EVENT bit is "1", the sum bit is set to "1" as well.
This part can be overwritten and read by the user at will. Its contents are not affected by
reading.
6.6.3 Contents of the Status Registers
The individual status registers are used to report different classes of instrument states or
errors. The following status registers belong to the general model described in IEEE
488.2:
●
The STatus Byte (STB) gives a rough overview of the instrument status.
●
The IST flag combines the entire status information into a single bit that can be quer-
ied in a
.
●
The Event Status Register (ESR) indicates general instrument states.
The status registers below belong to the device-dependent SCPI register model:
●
The STATus:OPERation register contains conditions which are part of the instru-
ment's normal operation.
●
The STATus:QUEStionable register indicates whether the data currently being
acquired is of questionable quality.
6.6.3.1
STB and SRE
The STatus Byte (STB) provides a rough overview of the instrument status by collecting
the pieces of information of the lower registers. The STB represents the highest level
within the SCPI hierarchy. A special feature is that bit 6 acts as the summary bit of the
remaining bits of the status byte.
Status Reporting System
