The VHF-LISN serves as a defined RF-termination device at the EuT’s mains cable during the radiated disturbance measurement. There are two VHF-LISN types available: the balanced VHF-LISN (VHFB 8801) and the unbalanced VHF-LISN (VHFU 8802), which can be used as an alternative to the CMAD (common mode absorption device).
The balanced VHF-LISN presents the same impedance to each terminal of the EUT’s AC mains power cable (symmetrical), resulting in a balanced load. This device complies with the standard CISPR 16-1-4 / Ed. 5
| Frequency range (nominal): | 30 MHz – 300 MHz |
| Impedance of live terminal | |
| Magnitude | 50 Ω ± 20 % |
| Phase | ≥ 108 MHz 0 º ± 11.5 º < 108 MHz 0 º ± 25 º |
| Impedance of neutral terminal | |
| Magnitude | 50 Ω ± 20 % |
| Phase | ≥ 108 MHz 0 º ± 11.5 º < 108 MHz 0 º ± 25 º |
| Impedance of PE terminal | |
| Magnitude | ≤ 0.314 x f Ω (f in MHz) |
| Phase | ≤ 90° |
| Isolation AE – EuT: | ≥ 40 dB |
| Maximum current: | 16 A |
| Maximum voltage: | 1000 V |
| Connector for EuT and AE: | 3×4 mm safety laboratory jacks |
| Ground connection: | 4 mm laboratory jack |
| Standard: | CISPR 16-1-4 / Ed5 |
| Material of the housing: | Aluminum |
| Dimensions: | 171 x 105 x 55 mm |
| Weight: | typ. 760 g |
| Accessories: Impedance Measurement Adapter (optional) | IMA 8803 |
