• LISN type: V-AMN, 50Ω // 1 µH
• Based on the standard ECSS-E-ST-20-07C Rev 1
• Characterized frequency range: 30Hz to 500MHz
• DC resistance: 120mΩ
• Maximum current: 10A continuous

The TekBox TBL0110-2 LISN is a two path 50 Ω // 1 µH Line Impedance Stabilization Network (LISN) characterized from 30Hz – 500 MHz. It is based on the standard ECSS-E-ST-20-07C Rev 1. which provides the general schematic of the LISN and allows for some flexibility in component values.

The TBL0110-2 implementation aims for use in EMC measurements of small satellites and spacecraft. The LISN does not have an output for conducted emission measurements; instead, it functions as a network for line impedance stabilization. An RF current monitoring probe (sold separately) is used to measure conducted emissions, according to the standard.

The 1µH inductor mimics the typical inductance of the supply wire harness in small spacecraft or satellites.

The LISN is inserted into the power line and power return line of the EUT.

To reproduce the system power bus impedance and to standardize the measurement conditions used in different test sites, emissions and susceptibility measurements on primary power lines shall be performed on inserting a Line Stabilization Network (LISN) between the EGSE power supply and the unit under test. The LISN schematic and the relevant impedance versus frequency are chosen in accordance with the bus impedance mask. The design of the LISN is usually provided by the spacecraft contractor. In case it is not available in time the LISN schematic and the relevant impedance versus frequency given below shall be used.

Prior to test, the network impedance shall be measured in the relevant frequency range and attached to the test report. 

ECSS-E-ST-20-07C specifies differential mode conducted emission measurements on power leads in the frequency range of 30 Hz to 100 kHz. Furthermore, ECSS-E-ST-20-07C specifies common mode and differential mode and differential mode conducted emission measurements on power and signal leads in the frequency range of 100 kHz to 100 MHz. 

*EGSE: Electrical Ground Support Equipment

LISN are also required in other ECSS-E-ST-20-07C measuring setups:

• Radiated emission - electric field
• Inrush current
• Conducted susceptibility - signal injection
• Conducted susceptibility - bulk cable injection
• Conducted susceptibility - transients
• Conducted susceptibility - spike series/parallel injection
• Radiated susceptibility - magnetic field
• Radiated susceptibility - electric field