Agilent Technologies 20ET ユーザーズマニュアル

6-50

Calibrating for Increased Measurement Accuracy

Calibrating for Non-Coaxial Devices (ES Analyzers Only)

The analyzer has the capability of making calibrations using the TRL*/LRM* method.
TRL* and LRM* are implementations of the thru-reflect-line and line-reflect-match
calibrations, modified for the three-sampler receiver architecture in the analyzer.
TRL/LRM calibration is available in analyzers with Option 400, which adds a fourth
sampler to the receiver. The following procedures apply to both TRL*/LRM* and TRL/LRM
calibrations.

TRL Error Correction

Create a User-Defined TRL Calibration Kit

In order to use the TRL 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 TRL (THRU,
REFLECT, LINE) standards. This example TRL kit contains the following:

• zero length THRU

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

• 50 ohm transmission line with 80 ps of offset delay for the LINE

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

standard is a

3. Press the following keys:

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

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

Enter a frequency greater than the maximum frequency range of the analyzer. For
example, press

. Then, press

Preset

Cal

CAL KIT MODIFY DEFINE STANDARD

REFLECT

SHORT

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

DELAY/THRU MODIFY STD DEFINITION

SPECIFY OFFSET OFFSET DELAY

.08

G/n

MAXIMUM FREQUENCY

G/n

STD OFFSET DONE