Agilent Technologies 20ET ユーザーズマニュアル

6-54

Calibrating for Increased Measurement Accuracy

LRM Error Correction

Create a User-Defined LRM Calibration Kit

In order to use the LRM technique, the calibration standards characteristics must be
entered into the analyzer’s user defined calibration kit.

The following steps show you how to define a calibration kit to utilize a set of LRM (LINE,
REFLECT, MATCH) standards. This example LRM kit contains the following:

• zero length LINE

• "flush" short for the REFLECT standard (0 second offset)

• 50 ohm termination for the MATCH (infinite length line)

NOTE

LRM with a zero length line is sometimes referred to as TRM (THRU,
REFLECT, MATCH).

Modify the Standard Definitions

1. Press the following keys to start modifying the standard definitions:

2. To select a short, press

. (In this example, the REFLECT standard is a

SHORT.)

3. Press the following keys:

4. To define the THRU/LINE standard, press:

5. To define the LINE/MATCH standard, press:

6. For the purposes of this example, change the name of the standard by pressing

, if a previous title exists,

and then modify the name to "MATCH".

7. When the title area shows the new label, press:

Preset

Cal

CAL KIT MODIFY DEFINE STANDARD

SHORT MODIFY STD DEFINITION SPECIFY OFFSET OFFSET DELAY

STD OFFSET DONE STD DONE (DEFINED)

DEFINE STANDARD

DELAY/THRU MODIFY STD DEFINITION

SPECIFY OFFSET OFFSET DELAY

STD OFFSET DONE

STD DONE (DEFINED)

DEFINE STANDARD

LOAD

MODIFY STD DEFINITION LABEL STD ERASE TITLE

DONE STD DONE (DEFINED)