TEKBOX TBL0110-2 1µH Line Impedance Stabilisation Network Instruction Manual

V1.1
TBL0110-2
1µH Line Impedance
Stabilisation Network

Introduction

The TBL0110-1 LISN is a two path 50 Ω//1 µH LISN characterized from 30Hz – 500 MHz. It is based on thestandard ECSS-E-ST-20-07C Rev 1. The standard provides the general schematic of the LISN and allows forsome flexibility in component values. The TBL0110-2 implementation aims for use in EMC measurements of smalsatellites and spacecraft. The LISN does not have an output for conducted emission measurements; instead, imerely functions as a network for line impedance stabilisation. An RF current monitoring probe 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.

Parameters

LISN type: V-AMN, 50 Ω // 1 µH
Characterized frequency range: 30 Hz – 500 MHz DC Resistance: 120 mΩ
Maximum current: 10 A continuous
Operating voltage range: 0 – 60V DC
EUT / SOURCE terminals: 4 mm banana sockets
Dimensions: W 120 mm x L 175 mm x H 85 mm; Weight: 0.9 kg

Impedance

Impedance: 1 kHz – 500 MHz; source terminals open, typical data Impedance: 1 kHz – 500 MHz; logarithmic impedance axis, source terminals open, typical data
The standard does not specify impedance limits. The green traces represent a ± 10% tolerance band of the simulated impedance (ideal components/no parasitics);Impedance: 30 Hz – 500 MHz; logarithmic impedance axis, source terminals open, typical data

Phase

Input phase: 1 kHz – 500 MHz; source terminals open, typical data

Isolation

Isolation from SOURCE terminals to EUT terminals: 1 kHz – 500 MHz, typical data

Principle Schematics

In order 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.

Measurement of conducted emissions

ECSSEST2007C specifies differential mode conducted emission measurements on power leads in the frequency range of 30 Hz to 100 kHz.
Furthermore, ECSSEST2007C specifies common mode and differential mode conducted emission measurements on power and signal leads in the frequency range of 100 kHz to 100 MHz.

Tekbox also provides suitable RF current monitoring probes, such as the TBCP2-30K400.

LISN are also required in other ECSSEST2007C 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;

References

ECSS-E-ST-20-07C Rev. 1

Ordering Information

measurements

History

TekBox Digital Solutions Vietnam Pte. Ltd.
www.tekbox.com
Factory 4, F4, Lot I-3B-1,
Saigon Hi-Tech Park,
Tan Phu Ward, District 9,
Ho Chi Minh City, Vietnam

References

• Tekbox Digital Solutions |

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