HP E1429A Manuel d'utilisateur télécharger pdf (Page 179)

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101

SCPI Command Format

The HP E1429 digitizer is programmed with SCPI commands. SCPI

commands are based on a hierarchical structure, also known as a tree

system. In this system, associated commands are grouped together under a

common node or root, thus, forming subtrees or subsystems. An example is

the digitizer’s ’ARM’ subsystem shown on the following page.

ARM

[:STARt | :SEQuence[1]]

:COUNt <

number

:DELay <

period

[:IMMediate] [no query]

:LEVel<

:NEGative <

voltage

:POSitive <

voltage

:SLOPe[<

>] <

edge

:SOURce[<

>] <

source

ARM is the root keyword of the command; :STARt|SEQuence1 is the

second level keyword; :COUNt, :DELay, ... are third level keywords, and so

on.

Keyword Separator A colon (:) always separates one command keyword from a lower level

command keyword as shown below:

ARM:LEV:NEG 2

Abbreviated

Commands

The command syntax shows most commands as a mixture of upper and

lower case letters. The upper case letters indicate the abbreviated spelling

for the command. For shorter program lines, send the abbreviated form. For

better program readability, you may want to send the entire command. The

digitizer will accept either the abbreviated form or the entire command.

For example, if a command’s syntax contains the keyword COUNt, then

COUN and COUNT are acceptable forms. Other forms of COUNt such as

COU will generate an error.

You can use upper or lower case letters. Therefore, COUNT, coun, or Coun

are all acceptable.

Chapter 4 Command Reference 179

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HP E1429A Manuel d'utilisateur Page 179

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