Line Impedance Stabilization Network (LISN)
DNB is a leading designer and producer of Line Impedance Stabilization Network (LISN) devices to support customers in conducted and radiated radio-frequency emission and susceptibility tests, as specified in various EMC/EMI tests.
A LISN is a low-pass filter typically placed between an AC or DC power source and the EUT (equipment under test) to create a known impedance and to provide a radio frequency (RF) noise measurement port. It also isolates the unwanted RF signals from the power source. In addition, LISNs can be used to predict conducted emission for diagnostic and pre-compliance testing.
Main Functions of a LISN
- Stable line impedance. Providing a precise impedance to the power input of the EUT, to get repeatable measurements of the EUT noise present at the LISN measurement port.
- Isolation of the power source noise. Preventing the high-frequency noise of the power source from coupling in the system. LISN functions as a low pass filter, which provides a high impedance to the outside RF noise while allowing the low-frequency power to flow through to the EUT.
- Safe connection of the measuring equipment. The stabilized impedance, the built-in low-pass filter function, and the DC rejection properties of the LISN measurement port make it easy to couple the high-frequency noise signal to the input of the measuring equipment.
DNB offers different types of LISNs:
The DB4011 line impedance stabilization network (LISN) is designed to meet the requirements of MIL-STD-461 specifications. LISN’s are available in multiple configurations and a wide variety of terminations. Additional customizations can be made at request, including voltage, current ratings, number of circuits, etc.
- Inductance: 50μH
- Frequency Range: 10kHz – 10MHz
- Current Ratings: 15A, 25A, 50A, 100A
- Voltage Ratings: DC – 400V, 60Hz – 270VAC, 400Hz – 130VAC
- Circuits: Single, Double
- RF Connector: BNC, N
- Terminations: Binding Post (5 way), Supercon, Receptacles*
The DB4111 line impedance stabilization network (LISN) is designed to meet the requirements of RTCA DO-160 (with external 10uF capacitor) and MIL-STD-461G, Appendix A specifications. LISN’s are available in multiple configurations and a wide variety of terminations. Additional customizations can be made at request, including voltage, current ratings, number of circuits, etc.
- Inductance: 5μH
- Frequency Range: 150kHz – 400MHz
- Current Ratings: 15A, 25A, 50A, 100A
- Voltage Ratings: DC – 800V, 60Hz – 480VAC, 400Hz – 270VAC, 800Hz – 130VAC
- Circuits: Single, Double
- RF Connector: BNC, N
- Terminations: Binding Post (5 way), Supercon*, Receptacles.
*Note: RTCA/DO-160 LISNs configurations are not available with Supercorn terminations.
The DB4211 line impedance stabilization network (LISN) is designed to meet the requirements of RTCA DO-160 (10uF capacitor included internally), DEF-STAN 59-411, and Euro Fighter specifications. LISNs are available in multiple configurations and a wide variety of terminations. Additional customizations can be made at request, including voltage, current ratings, number of circuits, etc.
- Inductance: 5μH
- Frequency Range: 9kHz – 400MHz
- Current Ratings: 15A, 25A, 50A, 100A
- Voltage Ratings: DC – 800V, 60Hz – 480VAC, 400Hz – 270VAC, 800Hz – 130VAC
- Circuits: Single, Double
- RF Connector: BNC, N
- Terminations: Binding Post (5 way), Supercon*, Receptacles
*Note: RTCA/DO-160 LISNs configurations are not available with Supercorn terminations.
The DB4311 line impedance stabilization network (LISN) is designed to meet the requirements of CISPR 16-1-2, CISPR 22, CISPR 15, and ANSI 63.4 specifications. Both the 50Ω/50μH and 50Ω/50μH+5Ω circuits are options. LISN’s are available in multiple configurations and a wide variety of terminations. Additional customizations can be made at request, including voltage, current ratings, number of circuits, etc.
- Inductance: 50μH, 50μH/250μH
- Frequency Range: 150kHz – 30MHz, 9kHz – 30MHz
- Current Ratings: 15A, 25A, 50A, 100A
- Voltage Ratings: DC – 400V, 60Hz – 270VAC, 400Hz – 130VAC
- Circuits: Single, Double
- RF Connector: BNC, N
- Terminations: Binding Post (5 way), Supercon, Receptacles*
The DB4411 line impedance stabilization network (LISN) is designed to meet the requirements of the CISPR 25 specification. LISN’s are available in multiple configurations and a wide variety of terminations. Additional customizations can be made at request, including voltage, current ratings, number of circuits, etc.
- Inductance: 5μH
- Frequency Range: 100kHz – 108MHz
- Current Ratings: 15A, 25A, 50A, 100A
- Voltage Ratings: DC – 400V, 60Hz – 270VAC, 400Hz – 130VAC
- Circuits: Single
- RF Connector: BNC, N
- Terminations: Binding Post (5 way), Supercon
The DB4511 line impedance stabilization network (LISN) is designed to meet the requirements of the ISO-7637-2 specification. LISN’s are available in multiple configurations and a wide variety of terminations. Additional customizations can be made at request, including voltage, current ratings, number of circuits, etc.
- Inductance: 5μH
- Frequency Range: 100kHz – 108MHz
- Current Ratings: 15A, 25A, 50A, 100A
- Voltage Ratings: DC – 400V, 60Hz – 270VAC, 400Hz – 130VAC
- Circuits: Single
- RF Connector: BNC, N
- Terminations: Binding Post (5 way), Supercon
CUSTOM LISNs
We can design and customize any LISN configuration based on your individual need.
part number breakdown
Custom Configuration
Please consult the factory for custom configurations. If a custom configuration is requested, please add '-C' to the end of the product number.