Calibrating For Non-Coaxial Devices (Es Analyzers Only); Trl Error Correction - Agilent Technologies 8719ES User Manual

Calibrating for Increased Measurement Accuracy

Calibrating for Non-Coaxial Devices (ES Analyzers Only)

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:
Preset Cal
CAL KIT
2. To select a short, press
.)
SHORT
3. Press the following keys:
SHORT MODIFY STD DEFINITION
x1
STD OFFSET DONE STD DONE (DEFINED)
4. To define the THRU/LINE standard, press:
DEFINE STANDARD
SPECIFY OFFSET
STD DONE (DEFINED)
5. To define the LINE/MATCH standard, press:
DEFINE STANDARD
SPECIFY OFFSET
Enter a frequency greater than the maximum frequency range of the analyzer. For
example, press
50
6-50
DEFINE STANDARD
MODIFY
. (In this example, the
1 x1
SPECIFY OFFSET
4 x1
DELAY/THRU
0
OFFSET DELAY
x1
6 DELAY/THRU
.08
OFFSET DELAY
. Then, press
G/n
STD OFFSET DONE
REFLECT
OFFSET DELAY
MODIFY STD DEFINITION
x1
STD OFFSET DONE
MODIFY STD DEFINITION
G/n
MAXIMUM FREQUENCY
.
standard is a
0