Technical data
Table Of Contents
- EMC Measurement Application Measurement Guide
- Table of Contents
- 1 EMC Measurements
- 2 Conducted Emissions Measurements
- 3 Radiated Emissions Measurements
- A: Line Impedance Stabilization Networks (LISN)
- B: Antenna Factors
- C: Basic Electrical Relationships
- D: Detectors Used in EMI Measurements
- Glossary of Acronyms and Definitions
25
Line Impedance Stabilization Networks (LISN)
A: Line Impedance Stabilization
Networks (LISN)
A line impedance stabilization network serves three purposes:
1. The LISN isolates the power mains from the device under test. the power supplied
to the DUT must be as clean a possible. Any noise on the line will be coupled to the
X-Series signal analyzer and interpreted as noise generated by the DUT
2. The LISN isolates any noise generated by the EUT from being coupled to the power
mains. Excess noise on the power mains can cause interference with the proper
operation of other devices on the line.
3. The signals generated by the DUT are coupled to the X-Series analyzer using a
high-pass filter, which is part of the LISN. Signals that are in the pass band of the
high-pass filter see a 50-Ω load, which is the input to the X-Series signal analyzer