R&S
®
ZVA/ZVB/ZVT Remote Control: Introduction
1145.1084.12 5.9 E-1
Device-Specific Commands
Device-specific commands are of hierarchical structure. The different levels are represented by
combined headers. Headers of the highest level (root level) have only one key word. This key word
denotes a complete command system.
Example:
SENSe This keyword denotes the command system SENSe.
For commands of lower levels, the complete path has to be specified, starting on the left with the
highest level, the individual key words being separated by a colon ":".
Example:
SENSe:FREQuency:STARt 1GHZ
This command is located on the third level of the SENSe system. It defines the start frequency of the
sweep.
The following rules simplify and abbreviate the command syntax:
• Multiple keywords
Some keywords occur on several levels within one command system. Their effect depends on the
structure of the command, i. e. on the position in the command header they are inserted in.
Example:
SOURce:FREQuency:CW lGHZ
This command contains the key word SOURce in the first command level. It defines the frequency for
sweep types operating at fixed frequency.
TRIGger:SOURce EXTernal
This command contains the key word SOURce in the second command level. It defines the trigger
source “external trigger”.
• Optional keywords
Some command systems permit certain keywords to be optionally inserted into the header or omitted.
These keywords are marked by square brackets in this manual. The full command length must be
recognized by the instrument for reasons of compatibility with the SCPI standard. Some commands are
considerably shortened by omitting optional keywords.
Example:
TRIGger[:SEQuence]:SOURce EXTernal
This command defines the trigger source “external trigger”. The following command has the same
effect:
TRIGger:SOURce EXTernal
An optional keyword must not be omitted if its effect is additionally specified by a numeric
suffix.
• Long and short form
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