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1142 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide

39 More About Oscilloscope Commands

No space or separator is allowed between the asterisk (*) and the

command header. *CLS is an example of a common command header.

Program Data Syntax Rules

Program data is used to convey a parameter information related to the

command header. At least one space must separate the command header

or query header from the program data.

When a program mnemonic or query has multiple program data, a comma

separates sequential program data.

For example, :MEASure:DELay CHANnel1,CHANnel2 has two program data:

CHANnel1 and CHANnel2.

Two main types of program data are used in commands: character and

numeric.

Character

Program Data

Character program data is used to convey parameter information as alpha

or alphanumeric strings. For example, the :TIMebase:MODE command can

be set to normal, zoomed (delayed), XY, or ROLL. The character program

data in this case may be MAIN, WINDow, XY, or ROLL. The command

:TIMebase:MODE WINDow sets the time base mode to zoomed.

The available mnemonics for character program data are always included

with the command's syntax definition.

When sending commands, you may either the long form or short form (if

one exists). Uppercase and lowercase letters may be mixed freely.

When receiving query responses, uppercase letters are used exclusively.

Numeric Program

Data

Some command headers require program data to be expressed numerically.

For example, :TIMebase:RANGe requires the desired full scale range to be

expressed numerically.

For numeric program data, you have the option of using exponential

notation or using suffix multipliers to indicate the numeric value. The

following numbers are all equal:

28 = 0.28E2 = 280e-1 = 28000m = 0.028K = 28e-3K.

When a syntax definition specifies that a number is an integer, that means

that the number should be whole. Any fractional part will be ignored,

truncating the number. Numeric data parameters accept fractional values

are called real numbers.

Agilent Technologies InfiniiVision 3000 X-Series Programmer's Guide

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