Custom Products

CUSTOM PRODUCTS

Test Equipment Manufacturing

It is not enough to be just a capable and equipped EMC and Environmental testing laboratory. What makes us different from others is our engineering and manufacturing knowledge and accomplishment. DNB Engineering is a manufacturer of custom EMC test equipment.

WE DESIGN AND MANUFACTURE CUSTOM EQUIPMENT

As part of our total solution approach, we manufacture:
– LISN’s (Line Impedance Stabilization Networks)
– Custom EMI Filters
– RF and Lightning Injection Probes
– RF Coupling Probes
– Custom EMI & Environmental Test boxes
– Test Cables
– Custom Antennas

What is a LISN?

Line Impedance Stabilization Network (LISN) devices are used in conducted and radiated radio-frequency emission and susceptibility tests, as specified in various EMC and 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. 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.

What Are the 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.

LISN Model DB4011

The DB4011 line impedance stabilization network (LISN) design meets the requirements of MIL-STD-461 specifications. LISN’s are available in multiple configurations and a wide variety of terminations, including additional customizations for 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*

DNB_LISN_DB4011_edited Download the Specification

LISN Model DB4111

The DB4111 line impedance stabilization network (LISN) meets 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 with Additional customizations for voltage, current ratings, number of circuits, etc.

Inductance: 50μH
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.

DNB_LISN_DB4111 Download the Specification

LISN Model DB4211

The DB4211 line impedance stabilization network (LISN) design meets 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. We can customize them for different voltage, current ratings, number of circuits, etc.

Inductance: 50μH
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.

DNB_LISN_DB4211 Download the Specification

LISN Model DB4311

The DB4311 line impedance stabilization network (LISN) meets 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. We can customize them 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*

DNB_LISN_DB4311_1 Download the Specification

LISN Model DB4411

The DB4411 line impedance stabilization network (LISN) meets the requirements of the CISPR 25 specification. LISN’s are available in multiple configurations and a wide variety of terminations. Additional customization options are voltage, current ratings, number of circuits, etc.

Inductance: 50μH
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

DNB_LISN_DB4411 Download the Specification

LISN Model DB4511

The DB4511 line impedance stabilization network (LISN) meets the requirements of the ISO-7637-2 specification. LISN’s are available in multiple configurations and a wide variety of terminations. We can customize them for different voltage, current ratings, number of circuits, etc.

Inductance: 50μH
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