NF FRA5014, Instruction Manual

Page: 60 / 107

5.4 Command Descriptions
FRA5014 5-12
5.4 Command Descriptions
5.4.1 Overview of programming language
The programming language is described briefly below.
5.4.1.1 Subsystem commands
Commands are divided into several groups, based on their functions. Subsystem comm ands are
hierarchical, and are defined using a colon ( : ) as the path separator.
5.4.1.2 Path separator
The path separator ( : ) separates the current key word from the key word at the next lower level. In
a command string, each time a colon ( : ) is detected, the current path is shifted one level downward.
However, if a colon ( : ) is used at the start of a command string, it means that the current path is set
as the root. These leading colons ( : ) can be omitted.
: M E A S : D E L 9 9 9 . 9 9
<1> Sets current path as root
<2> MEASure subsystem command (MEASure is the root command)
<3> DELay command that belongs to MEASure subsystem
<4> A space is required between the header and parameter
When a semicolon (;) is used as a separator in a command string, access to subsystem commands on
the same level is enabled, without having to change the current path.
5.4.1.3 Simplification of command strings
In this instruction manual, when the command syntax is described, uppercase letters are mixed with
lowercase letters in a command (and in some parameters). Uppercase letters are used in
abbreviated (short-form) commands. When the part shown in lowercase letters is omitted in a
command, the command is still interpreted as if it includes the lowercase letters (i.e., as a long -form
command). It is not possible to use an intermediate form that includes only some of the lowercase
letters.
This distinction between uppercase and lowercase letters is a convenient method for indicating the
short form, but the actual devices do not make this distinction. Uppercase and lowercase letters
can be mixed in any order.
Example) :SYSTem:ERRor?
→
system:error?
“Acceptable”
(lowercase letters)
SYSTEM:error?
“Acceptable”
(mixed uppercase and lowercase letters)
SYSTE:ERROR?
“Not acceptable” (intermediate form)
SYST:ER?
“Not acceptable” (overly abbreviated)

<1>

<2>

<3>

<4>