6-50
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:
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
1x1
REFLECT
SHORT
SHORT
MODIFY STD DEFINITION
SPECIFY OFFSET
OFFSET DELAY
0
x1
STD OFFSET DONE
STD DONE (DEFINED)
DEFINE STANDARD
4x1
DELAY/THRU
MODIFY STD DEFINITION
SPECIFY OFFSET
OFFSET DELAY
0x1
STD OFFSET DONE
STD DONE (DEFINED)
DEFINE STANDARD
6x1
DELAY/THRU
MODIFY STD DEFINITION
SPECIFY OFFSET
OFFSET DELAY
.08 G/n
MAXIMUM FREQUENCY
50 G/n
STD OFFSET DONE