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Calibrating for Increased Measurement Accuracy
LRM Error Correction
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
1x1
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
3x1
LOAD
MODIFY STD DEFINITION
LABEL STD
ERASE TITLE
DONE
STD DONE (DEFINED)