Impedance stabilization networks (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. Different ISNs are available in relation to the line category, line numbers and pin-arrangement. The ISN T8 is designed for measurements on up to four unscreened single balanced pairs and consists of one basic network (ISN T800) with D sub 25 connectors and special adapter sets. A set of adapters consists of two pieces of LCL adapters to arrange the lines and realize longitudinal conversion loss (LCL)- requirements for the EUT-side in relation to the use cable category (cat. 3, cat. 5) and one piece of connection adapter arranges the lines for the AE-side. Teseq offers two different adapter sets – ADS T800 and ADS T8x0. ADS T800 gives the connection to RJ45 sockets with pin-arrangements of EIA/TIA T568A respectively T568B. The adapter set ADS T8x0 offers changeable pin-arrangements via 1 mm banana connectors for each pin combination of RJ11/RJ45. The ISN T8 is designed for measurements on up to four unscreened single balanced pairs and consists of one basic network (ISN T800) with D sub 25 connectors and special adapter sets. A set of adapters consists of two pieces of LCL adapters to arrange the lines and realize longitudinal conversion loss (LCL)- requirements for the EUT-side in relation to the use cable category (cat. 3, cat. 5) and one piece of connection adapter arranges the lines for the AE-side. Teseq offers two different adapter sets – ADS T800 and ADS T8x0. ADS T800 gives the connection to RJ45 sockets with pin-arrangements of EIA/TIA T568A respectively T568B. The adapter set ADS T8x0 offers changeable pin-arrangements via 1 mm banana connectors for each pin combination of RJ11/RJ45.

阻抗穩定網路（ISN），在 CISPR 16-1-2 中亦稱為 AAN（非對稱人工網路），用於測量資訊技術設備（ITE）依據 CISPR 22 和 CISPR 32 標準規範的傳導共模干擾。

ISN 置於受測設備（EUT）與輔助設備（AE）或負載之間，以確保受測設備在測試期間的電信端口具有適當的共模終端阻抗，並模擬連接線纜的非對稱特性（縱向轉換損耗，LCL）。

不同類型的 ISN 適用於不同的線纜類別、線數及針腳排列。

ISN T8 產品特性

• 設計用於測試最多四條非屏蔽單平衡雙絞線
• 由ISN T800 基本網路（D-sub 25 針連接器）及專用適配器套件組成
• 適配器套件包含：
  • 兩個 LCL 適配器，用於調整線路並符合不同線纜類別（Cat. 3、Cat. 5）的 LCL 要求（EUT 端）
  • 一個連接適配器，用於調整 AE 端的線路

適配器選擇

Teseq 提供兩種適配器套件：

1. ADS T800：適用於 RJ45 插座，符合 EIA/TIA T568A 和 T568B 針腳排列
2. ADS T8x0：透過 1mm 香蕉插頭，可更換 RJ11/RJ45 的不同針腳排列

ISN T8 符合 CISPR 22/32 測試標準，可有效評估 EUT 之傳導共模干擾特性，並可應用於各類 ITE 設備的測試環境。

技術參數：

頻率範圍： 150 kHz – 30 MHz
線路參數： 1對至4對
功率 (EUT和AE埠)
最大交流電壓(線對地) 63 V
最大直流電壓(線對地) 100 V
最大電流 400 mA(單線), 800 mA (每對)
測試電壓 200 VDC、2秒
共模阻抗 (EUT 埠) 150 kHz – 30 MHz 150 Ω ± 20 Ω
相位角 Phase angle（EUT 埠）150 kHz – 30 MHz 0°±20°
耦合路徑 (In/Out – port/EUT)
接頭： BNC 50 Ω
RF電壓： <15 V
頻率範圍： 150 kHz – 30 MHz
分壓係數（RF輸出 – EUT埠）150 kHz – 30 MHz： 10 dB±1 dB
傳輸頻寬（有用信號） EUT/AE：3 dB頻寬 * > 100 MHz sin.
LCL (EUT) *)
Cat. 3 150 kHz – 30 MHz: 55 dB – 39.3 dB ±3 dB
Cat. 5 150 kHz – 2 MHz: 65 dB±3 dB
Cat. 5 2 MHz – 30 MHz: 65 dB – 49.3 dB +4.5/-3 dB
共模干擾的去耦（EUT/AE）
150 kHz – 1.5 MHz: ≥35 dB – ≥55 dB
1.5 MHz – 30 MHz: ≥55 dB
串擾 (PSELFEXT) (EUT / AE) 1 MHz – 100 MHz: ≥61 dB – ≥21 dB
*) 所有平衡參數都相對於100 Ω對稱阻抗

• For use with one, two, three, or four unscreened balanced pairs
• Refers schematic circuit example in CISPR 22/32 Figure D.3/G.3
• Intended for connection to cable category 3 and 5
• 1000BaseT and PoE application
• Changeable pin-arrangements with RJ11 and RJ45

• 適用於單一、雙、三或四組非屏蔽平衡雙絞線
• 參考 CISPR 22/32 圖 D.3/G.3 示意電路
• 適用於連接至 3 類及 5 類纜線
• 適用於 1000Base-T 及 PoE 應用
• RJ11 和 RJ45 插座可變換接線

• CISPR Standards : CISPR 15 CISPR 16-1-2 CISPR 16-2-1 CISPR 22 CISPR 32
• IEC / EN Generic Standards : EN 61000-6-3 EN 61000-6-4