Command reference
R&S
®
ZNL/ZNLE
644
User Manual 1178.5966.02 ─ 19
form or the long form; mixed forms are not always recognized. The R&S
ZNL/ZNLE
itself does not distinguish upper case and lower case characters.
11.5.1.2
Special characters
The following special characters are frequencly used in the command description:
●
|
A vertical stroke characterizes alternative parameter settings. Only one of the
parameters separated by | must be selected.
●
[ ]
Mnemonics in square brackets can be omitted when composing the command
header. The complete command must be recognized by the instrument for reasons
of compatibility with the SCPI standard. Parameters in square brackets are optional
as well. They may be used in some application contexts, omitted in others.
●
{ }
Braces or curly brackets enclose one or more parameters that may be included
zero or more times.
11.5.1.3
Parameters
Many commands are supplemented by a parameter or a list of parameters. Parame-
ters either provide alternative options (setting a or setting b or setting c ..., see special
character "|"), or they form a list separated by commas (setting x, y).
●
<Parameter1>, <Parameter2>...:
In the command tables and lists, parameters are
generally described by a name (Parameter1, Parameter2...) written in angle brack-
ets (<>). In an application program, <Parameter1>, <Parameter2>... must be
replaced by one of the possible settings reported in the detailed parameter descrip-
tion.
Example:
CONTrol:AUXiliary:C[:DATA] <DecValue>
with <DecValue> = 0 to 255
--> possible command syntax:
CONTrol:AUXiliary:C:DATA 1
●
NAN (Not A Number)
(as a returned value) is generally used to represent missing
data, e.g. if a portion of a trace has not been acquired yet. It is also returned after
invalid mathematical operations such as division by zero. As defined in the SCPI
standard, NAN is represented as 9.91 E 37.
●
INV (INValid)
is returned e.g. if a limit check is performed without defining the
appropriate tolerance values.
11.5.1.4
Numeric suffixes
Symbols in angular brackets (<Ch>, <Chn>, <Mk>...) are numeric suffixes. Numeric
suffixes are replaced by integer numbers to distinguish various items of the same type.
The analyzer provides numeric suffixes for channels, traces, ports, markers etc. If
unspecified, a numeric suffix is replaced by 1.
The marker suffix must be in the range between 1 and 10, the number of ports
depends on the analyzer model. No restrictions apply to channel, trace, and diagram
suffixes.
In remote control, one active trace can be selected for each channel; see
ter 11.4.2.2, "Active traces in remote control"
on page 625. This concept simplifies the
VNA command reference
