Overview
LISN (Line Impedance Stabilization Network) / AMN (Artificial Mains Network):
Supplies necessary AC or DC mains voltage and current for the Equipment under Test (EuT).
Couples interference voltage generated by the EuT and supplies it to the receiver.
Provides a well-defined RF-impedance to the EuT.
Filters out unwanted disturbance coming from mains.
Protects mains from unwanted disturbance voltage generated by the EuT.
Types of LISNs
V-LISN:
Measures unsymmetric disturbance voltage between two lines (L1 and ground or L2 and ground).
Commonly used for equipment connected to onboard mains with DC or 400 Hz.
Two types based on impedance:
5µH inductance (CISPR 16-1-2, CISPR 25, ISO 7637, DO160): For vehicles, boats, and aircrafts.
50µH inductance (CISPR 16-1-2, MIL STD 461, ANSI C63.4): For mains frequencies of 50 Hz or 60 Hz.
T-ISN:
Measures asymmetric disturbance voltage (common mode voltage).
Typically used for telecommunication and data transmission equipment connected to symmetrical lines like twisted pairs.
Delta-LISN:
Measures voltage relationships in two-line systems with separate ground.
Figure 1: Measurement Setup for Conducted Disturbances
Depicts the typical setup used to measure conducted disturbances using LISNs.
Figure 2: Voltage Relationship of a Two-Line System with Separate Ground
Shows how V-LISNs and T-ISNs measure disturbance voltages in different configurations.
Schwarzbeck LISN overview
| Type | Topology | Impedance | Current max. | Paths | Datasheet | Options |
| CISPR 16-1-2 socket | ||||||
| NSLK 8117 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 2 x 10 A | 2 | Datasheet | |
| NSLK 8127 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 2 x 16 A | 2 | Datasheet | RC, PLC |
| NSLK 8126 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 2 x 16 A Schuko | 4 | Datasheet | RC |
| 4 x 16 A CEKON | ||||||
| NSLK 8128 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 2 x 16 A Schuko and | 4 | Datasheet | RC |
| 4 x 32 A CEKON | ||||||
| NSLK 8163 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 4 x 64 A CEKON | 4 | Datasheet | RC |
| CISPR 16-1-2 Wing Terminals | ||||||
| NNLK 8121 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 4 x 50 (100) A | 4 | Datasheet | RC, Hochstrom, 400/700V, Lüfter |
| NNLK 8122 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 2 x 50 A | 2 | Datasheet | |
| NNLK 8129 | V-LISN | 50 µH || 50 Ω | 4 x 200 (300) A | 4 | Datasheet | RC, 400/700 V, Lüfter |
| NNLK 8129-2 HV | V-LISN | 50 µH || 50 Ω | 2 x 200 (300) A | 2 | Datasheet | RC,TC |
| NNLK 8130 | V-LISN | 50 µH || 50 Ω | 4 x 400 (500) A | 4 | Datasheet | RC |
| NNLK 8140 | V-LISN | 50 µH || 50 Ω | 1 x 800 (1000) A | single | Datasheet | |
| Automotive | ||||||
| NNHV 8123 | V-LISN | 5µH || 50 Ω | 70 (100) A | single | Datasheet | |
| NNHV 8123-200 | V-LISN | 5µH || 50 Ω | 200 A | single | Datasheet | |
| NNHV 8123-400 | V-LISN | 5µH || 50 Ω | 400 A | single | Datasheet | |
| NNHV 8123-400R | V-LISN | (5µH + 1 Ω) || 50 Ω | 400 A | single | Datasheet | |
| NNHV 8123-800 | V-LISN | 5µH || 50 Ω | 800 A | single | Datasheet | |
| NNBM 8124 | V-LISN | (5µH + 1 Ω) || 50 Ω | 70 (100) A | single | Datasheet | N-connector |
| NNBM 8124-200 | V-LISN | (5µH + 1 Ω) || 50 Ω | 200 A | single | Datasheet | N-connector |
| NNBM 8124-400 | V-LISN | (5µH + 1 Ω) || 50 Ω | 400 A | single | Datasheet | N-connector |
| NNBM 8124-800 | V-LISN | (5µH + 1 Ω) || 50 Ω | 800 A | single | Datasheet | N-connector |
| NNBM 8126 A 890 | V-LISN | 5 µH || 50 Ω | 70 (100) A | single | Datasheet | DO-160 |
| NNBM DO160-1500 | V-LISN | 5 µH || 50 Ω | 200 (280) A | single | Datasheet | |
| BAN 8508 | 8 A (DC) | single | Datasheet | |||
| BAN 8530 | 30 A (DC) | single | Datasheet | |||
| MIL | ||||||
| NNBL 8225 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 20 A | single | Datasheet | |
| NNBL 8226 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 70 (100) A | single | Datasheet | |
| NNBL 8226-HV | V-LISN | (50 µH + 5 Ω) || 50 Ω | 70 (100) A | single | Datasheet | |
| NNBL 8226-2 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 70 (100) A | 2 | Datasheet | |
| NNBL 8229-HV | V-LISN | (50 µH + 5 Ω) || 50 Ω | 200 A | single | Datasheet | |
| NNBL 8230 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 300 A | single | Datasheet | |
| NNBL 8240 | V-LISN | (50 µH + 5 Ω) || 50 Ω | 800 (1000) A | single | Datasheet | |
| T-ISN | ||||||
| NTFM 8131 | T-ISN | 150 Ω ± 10% | 3 A (AC) | 2 | Datasheet | |
| NTFM 8158 | T-ISN | 150 Ω ± 20 Ω | 600 mA DC (pair) | 2 | Datasheet | |
| CAT5 8158 | T-ISN | 150 Ω ± 20 Ω | 600 mA DC (pair) | 2 | Datasheet | |
| CAT3 8158 | T-ISN | 150 Ω ± 20 Ω | 600 mA DC (pair) | 2 | Datasheet | |
| ISN S8 | T-ISN | 150 Ω ±20 Ω | 1 A (DC) | 8 | Datasheet | |
| 150 Ω + 60 Ω /-45 Ω | ||||||
| ISN S1 | T-ISN | 150 Ω ±20 Ω | 1 A (DC) | single | Datasheet | |
| 150 Ω + 60 Ω /-45 Ω | ||||||
| Special – LISN | ||||||
| Pilot ISN | 150 Ω ±20 Ω | 1.4 A DC | 2 | Datasheet | ||
| ECSS LISN1 | (1.5 µH) || 50 Ω | 10 A | 2 | Datasheet | ||
| ECSS LISN 2 | (2 µH) || 50 Ω | 10 A | 2 | Datasheet | ||
| ECSS LISN 2 – 75A | (2 µH) || 50 Ω | 75 A | 2 | Datasheet | ||
| ECSS LISN 3 | (0.7 µH) || 50 Ω | 10 A | 2 | Datasheet | ||
| NPLC 8500 | V-LISN | 1 Ω | 16 A | single | Datasheet | |
| PVDC 8300 | PV-LISN | 150 Ω common | 50 A (100 A with opt. fans) | 2 | Datasheet | Fans |
| Universal | 100 Ω differental | |||||
| PVDC 8301 | PV-LISN | 150 Ω common | 200 A | 2 | Datasheet | |
| Universal | 100 Ω differental | |||||
| TEMP 8400 | Tempest- | 1.4 kΩ | 16 A | 2 | Datasheet | TEMP 8401 |
| V-LISN | ||||||