User`s guide

Agilent 4155C/4156C User’s Guide Vol.2, Edition 6 8-9
Support Functions
User Function and User Variable
Expression
An expression can be used for following:
• In a user function definition
• As a condition for an automatic analysis function
• For direct keyboard calculation
NOTE Direct Keyboard Calculation
You can directly calculate the value of an expression as follows:
• Enter the expression by using the front-panel keys, press the green key, then
press
Enter. The value of the expression is displayed.
If the expression contains data variables that are related to measurement points, the
calculated value corresponds to the marker position.
Figure 8-2 shows the syntax of an expression. Notice that an expression can be used
within an expression.
Figure 8-2 Expression Syntax