ISN / CDN for RJ-45 Shielded
- ▸ Impedance Stabilization Network (ISN) for shielded telecom ports — measures common-mode conducted emissions on screened (shielded) lines with up to four balanced pairs per EN 55022/32 (CISPR 22/32) and CISPR 16-1-2. ISN role applied 150 kHz–30 MHz.
- ▸ 150 Ω common-mode termination per CISPR 22/32 — standard-defined impedance on the screened pairs so disturbance voltage at the measurement port is stable and repeatable.
- ▸ Shielded RJ-45 receptacles on EUT and AE ports — direct mate with shielded Cat-5e/Cat-6/Cat-6A patch cords; no adapters required.
- ▸ Shielded Ethernet ports on ITE — PoE switches, NICs, routers, network appliances, and servers with shielded RJ-45 jacks.
- ▸ Industrial Ethernet / Profinet / EtherCAT shielded drops — field switches, drives, and I/O modules using shielded balanced pairs.
- ▸ 50 Ω BNC measurement port on top of housing — direct mate to spectrum analyzer / EMI receiver for the disturbance voltage scan.
- ▸ Also usable as a CDN for IEC/EN 61000-4-6 conducted immunity — secondary capability over the full 150 kHz–230 MHz band when needed.
- ▸ Individually calibrated; compact and light at 2 lbs (0.9 kg) — outer surface designed for grounding to the reference plane; pairs with the SPA-900TG series spectrum analyzer / EMI receiver.
ISN/CDN-T8SE Features
- ▸ ISN for conducted emissions on shielded telecom ports — up to 4 balanced pairs, per EN 55022/32 (CISPR 22/32)
- ▸ Meets CISPR 16-1-2 — measurement equipment specification
- ▸ Frequency range 150 kHz to 30 MHz (ISN, emissions)
- ▸ Frequency range 150 kHz to 230 MHz (CDN, immunity)
- ▸ Shielded RJ-45 EUT and AE receptacles — direct mate to shielded Ethernet patch cords
- ▸ 150 Ω common-mode impedance — per CISPR 22/32 ISN specification
- ▸ Voltage division factor 9.5 dB (+1.5 / −0.5)
- ▸ High decoupling of common-mode disturbance — ≥ 45 dB @ 150 kHz; ≥ 50 dB @ 500 kHz; ≥ 50 dB @ 230 MHz (RF/AE)
- ▸ 50 Ω BNC (female) measurement port on top of enclosure — direct mate to spectrum analyzer / EMI receiver
- ▸ 1.5 A maximum EUT current rating — supports PoE and similar powered ports
- ▸ Compact and light — 8.5 × 4.5 × 3.5 in (21.5 × 11.4 × 8.8 cm), 2 lbs (0.9 kg)
- ▸ Also functions as a CDN for IEC/EN 61000-4-6 immunity — same unit, 150 kHz–230 MHz
- ▸ Individually calibrated
ISN/CDN-T8SE Specifications
| Parameter | Specification |
|---|---|
| Model | CDN-T8SE |
| Primary Role | Impedance Stabilization Network (ISN) — shielded telecom (up to 4 balanced pairs) |
| Applicable Standards (ISN) | EN 55022/32, CISPR 22/32, CISPR 16-1-2 |
| Secondary Role | Coupling/Decoupling Network (CDN) for IEC/EN 61000-4-6 immunity |
| Frequency Range (ISN, emissions) | 150 kHz to 30 MHz |
| Frequency Range (CDN, immunity) | 150 kHz to 230 MHz |
| Cable Type | Shielded (screened), up to four balanced pairs |
| EUT / AE Connectors | Shielded RJ-45 receptacles |
| Measurement / RF Port | 50 Ω BNC (female), top of enclosure |
| Common-Mode Impedance | 150 kHz–26 MHz: 150 Ω ± 20 Ω 26–80 MHz: 150 Ω +60/−45 Ω 80–230 MHz: 150 Ω +60/−60 Ω |
| Voltage Division Factor (VDF) | 9.5 dB (+1.5 / −0.5) |
| Decoupling (Common Mode, RF/AE) | ≥ 45 dB @ 150 kHz; ≥ 50 dB @ 500 kHz; ≥ 50 dB @ 230 MHz |
| Voltage Rating (Line to Ground) | 124 V AC / 125 V DC |
| Current Rating (max) | 1.5 A |
| RF Input Voltage (max, CDN mode) | 40 Vrms |
| Dimensions | 8.5 × 4.5 × 3.5 in (21.5 × 11.4 × 8.8 cm) |
| Weight | 2 lbs (0.9 kg) |
| Calibration | Individual calibration included |
Secondary use (CDN): Same unit also functions as a coupling/decoupling network for IEC/EN 61000-4-6 immunity testing — ADA-T8SE shorting adapters, ADA-515-2 150/50 Ω adapters, TEP-050 terminator, ATTN-6-100W attenuator, DCU-300-100W coupler, and ASC-series amplifiers complete the immunity setup.
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