Description
Measuring conducted emission is the simplest and most affordable method of getting some indication of whether a design can meet EMI/EMC requirements. A Line Impedance Stabilization Network (LISN) is an indispensable part of an EMC pre-compliance test setup.
In cooperation with Würth Elektronik, Elektor has developed a 5 µH, 50 Ω Dual DC LISN that supports voltages up to 60 V and currents up to 10 A.
The instrument measures RF interferences on both channels (the power supply) by means of 5-μH blocking inductances. The internal 10-dB attenuation network – one in each channel – contains a 3rd-order high-pass filter with a cutoff frequency of 9 kHz to protect the input of instruments like a spectrum analyzer from potentially harmful DC voltages or low frequencies coming from the EUT (Equipment Under Test).
Specifications
| RF path | |
| Channels | 2 (with clamping diodes) |
| Bandwidth | 150 kHz – 200 MHz |
| Inductance | 5 μH || 50 Ω |
| Internal attenuation | 10 dB |
| Connectors | SMA |
| DC path | |
| Max. current | < 10 ADC
|
| Max. voltage | < 60 VDC
|
| DC resistance | < 2 x 70 mΩ |
| PCB size | 94.2 x 57.4 mm |
| Connectors | 4-mm banana |
| Hammond enclosure | |
| Type | 1590N |
| Dimensions | 121 x 66 x 40 mm |
Included
- 1x 4-layer PCB with all SMT parts fitted
- 1x pre-drilled enclosure with ready-printed front panel layout
- 5x gold-plated, insulated, 4-mm banana sockets, rated for 24 A, 1 kV
- 1x Hammond enclosure 1590N1, Aluminum (Die-Cast Alloy)
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