Rohde & Schwarz CMU-K20, Operating Manual

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Status Reporting System CMU-K20/-K21/-K22/-K23/-K24
1115.6088.12 5.6 E-10
Specifying Limits
The following table gives an overview of the types of limits and possible results of the limit check.
Table 5-3 Limits and limit check
Type Description Command
Scalar limits Limit values for a single (scalar) measured quan-
tity. Depending on the measured quantity, either
an upper limit or upper and lower limits can be
defined. CONFigure:<meas_obj>:LIMit:<Spec.>
[<LowerLimit>,]<UpperLimit>
<Spec.>
denotes a keyword (an array of keywords)
specifying the measured quantity.
Limit lines For
POWer
and
SPECtrum
measurements a
tolerance template consisting of up to 16 time
ranges (areas) can be defined (the
POWer:MSLot
template is composed of several
single-slot templates).
CONFigure:<meas_obj>:LIMit:LINE:<Spec.>
<Limit_line_param.>
<Spec.>
denotes the two keywords specifying the
upper or lower limit line in a time range and the burst
type considered.
<Limit_line_param.>
contains the coordinates of
the start and end points of the limit line plus an infor-
mation whether the current range is valid or not.
Limit check All scalar limits belonging to the same meas-
urement group are read out together with the
command on the right side.
CALCulate:<meas_obj.>[:RESult]:LIMit:
MATChing?
Possible results of the scalar limit check are
listed on the right side. Further messages as-
sessing, e.g., the power ramp or the result of the
BER test in general, may be issued in particular
cases (see detailed command description in
chapter 6).
NMAU
not matching, underflow
NMAL
not matching, overflow
INV
measured value invalid
OK
no limit failure
The result of the limit check depends on the
statistics settings (see section
Measurement
Statistics on page 5.5 ).
CALCULATE:ARRay:<meas_obj>[:RESult]
:LIMit:MATChing<disp>?
....
where
<disp> = [:CURRent] | :AVERage |
| :MMAXimum | :MAXimum | :MINimum
Status Reporting System
A general description of SCPI status registers and of the status reporting system is given in chapter 5 of
the CMU operating manual. This section is devoted to the particular features concerning GSM meas-
urements.
The CMU offers 30 independent
STATus:OPERation:CMU:SUM1|2:CMU<nr>
sub-registers (<nr>=1
... 15) which are implemented in hierarchical form. The bits of the 30 STATus:OPERation registers are
set only after the registers are assigned to a function group and measurement mode.
In the CONDition part, the STATus:OPERation register contains information on which actions the in-
strument is being executing or, in the EVENt part, information on which actions the instrument has exe-
cuted since the last readout. All fife parts of the registers can be read using one of the commands of the
subsystem
STATus:OPERation:CMU:SUM1|2:CMU<nr>:...
Note: Symbolic status register evaluation by means of the commands
STATus:OPERation:
SYMBolic:ENABle
and
STATus:OPERation:SYMBolic[:EVENt]?
is a convenient alter-
native method of retrieving status information. See also section Symbolic Status Event Regis-
ter Evaluation in chapter 5 of the CMU operating manual and chapter 6 of this manual.
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