ISN S501A, S502A, S751 and S752
Impedance stabilization networks (ISN, or with CISPR 16-1-2 called AAN: asymmetric artificial network or AN: artificial networks for coaxial and other screened cables) are defined for measuring of conducted common mode disturbances at information technology equipment (ITE) as required in CISPR 22. The ISN is placed between the equipment under test (EUT) and auxiliary equipment (AE) or load which are necessary for the operation of the EUT. The ISN establishes the common-mode termination impedance for the EUT’s telecommunications port during measurement.
ISN S501A, ISN S502A, ISN S751 and ISN S752 are designed for measurements on coaxial telecommunication lines. The used internal cable has a impedance of 50 Ω for ISN S501A and ISN S502A or 75 Ω for ISN S751 and ISN S752. The cable screen is connected on the AE side to the ground. ISN S502A and ISN S752 are supplied with double screened coaxial cables and N connector. A design example is given in figure D.9 CISPR 22 (EN 55022) and figure G.9 CISPR 32 (EN 55032).
| Parameter | Value |
|---|---|
| Frequency range | 150 kHz to 230 MHz |
| Power rating (EUT- and AE port) | AC max. voltage (line to ground): 250 V DC max. voltage (line to ground): 400 V Current max : 1000 mA Test voltage: 750 V DC, 2 sec |
| Common mode impedance (EUT port) | 150 kHz to 30 MHz: 150 Ω ±20 Ω 30 MHz to 230 MHz: 150 Ω +60 Ω/-45 Ω |
| Phase angle (EUT Port) 150 kHz to 30 MHz | 0° ±20° |
ISN ST08
Impedance stabilization networks (ISN, or with CISPR 16-1-2 called AAN: asymmetric artificial network or AN: artificial networks for coaxial and other screened cables) are defined for measuring of conducted common mode disturbances at information technology equipment (ITE) as required in CISPR 22.
The ISN is placed between the equipment under test (EUT) and auxiliary equipment (AE) or load which are necessary for the operation of the EUT. The ISN establishes the common-mode termination impedance for the EUT’s telecommunications port during measurement. All internal parts fulfill the requirements of cat.6 or better and provide optimal transfer performance. The used internal cable has a symmetrical impedance of 100 Ω. The pin- arrangement of the RJ45 sockets meets the requirements of EIA / TIA 568B.
ISN ST08 meets the requirements of CISPR 22, EN 55022, CISPR 32, EN 55032, CISPR 16-1-2 and EN 55016-1-2. Unlike the ISN T types for unscreened balanced lines the ISN ST08 needs no additional adapters for LCL setting.
| Parameter | Value |
|---|---|
| Frequency range | 150 kHz to 230 MHz |
| Line parameters | 4 pairs, balanced, shielded, 100 Ω impedance |
| Power rating (EUT- and AE Port) |
AC max. voltage: 100 V DC max. voltage: 150 V Current max : 1.2 A (line) Test voltage: 200 VDC, 2 sec |
| Common mode impedance (EUT Port) |
150 kHz to 30 MHz: 150 Ω ±20 Ω 30 MHz to 230 MHz: 150 Ω +60 Ω/-45 Ω |
