ISN30M Impedance Stabilization Network (ISN) with Coupling/Decoupling Network (CDN)

The ISN30M Impedance stabilization network (ISN, or with CISPR 16-1-2 called AAN: asymmetric artificial network) are defined for measuring of conducted common mode disturbances at information technology equipment (ITE) as required in CISPR 22 and CISPR 32. 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 and emulates the unsymmetrical contribution (longitudinal conversion loss, LCL) of the connected line. 

Features & Specifications of ISN30M:

• Frequency range (ISN): 150 kHz – 30 MHz
• Frequency range (CDN): 150 kHz – 80 MHz
• Type: T8, T4, T2-ISN, CDN (EAB8 50-150 required)
• Insertion loss: differential mode AE - EuT port: typ.: < 1 dB 100 kHz to 30 MHz typ.: < 2.5 dB 30 MHz to 250 MHz (Fig.3)
• Decoupling AE-EuT: >55 dB (Fig.4)
• Longitudinal Conversion Loss (LCL): 75 dB @ 150 kHz 59 dB @ 30 MHz (Fig.5)
• Voltage division factor for asymmetrical voltage: 10 dB ± 1 dB (Fig.6)
• Impedance (asymm.): ≤30 MHz: 150 Ω ± 20 Ω (Fig.7) >30 MHz: 150 Ω + 60 Ω/ -45 Ω≤
• Common mode phase angle: 0° ± 20° (Fig.8)
• Connectors AE, EuT: RJ-45 (8P8C)
• Current max: 800 mA (pair)
• Max. voltage: 63 VAC / 100 VDC
• Measurement port: BNC 50 Ω female
• Crosstalk PSELFEXT: typ.: > 66 dB 150 kHz – 1 MHz typ.: > 46 dB at 10 MHz typ.: > 38 dB at 30 MHz
• Weight: 465 g (1 Lbs)
• Outer dimensions W x H x D: 125 mm x 62 mm x 105 mm (5 x 2.4 x 4 inches)
• CISPR circuit diagram: CISPR 22, Appendix D, Fig. D.3

Standards Met:

• IEC/EN 61000-4-6
• CISPR 15
• CISPR 16-1-2
• CISPR 16-2-1
• CISPR 22
• CISPR 24
• CISPR 32
• EN 61000-6-1
• EN 61000-6-2
• EN 61000-6-3
• EN 61000-6-4
• IEC 60533
• IEC 60601-1-2
• IEC 61326