Teseq ISN T8-Cat6 Impedance Stabilization Network (ISN) for Unscreened Balanced Pairs

The Teseq ISN T8 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 Teseq ISN T8-Cat6 is designed for measurements on up to four unscreened single balanced pairs with cable category cat. 6. It can also be used as CDN for immunity testing according IEC/EN 61000-4-6 up to 80 MHz.

Features & Specifications of Teseq ISN T8-Cat6:

• Frequency range: 150 kHz to 80 MHz
• Line parameters: 1 pair
• Power rating (EUT- and AE port)
  • AC max. voltage (line to ground): 63 V
  • DC max. voltage (line to ground): 100 V
  • Current max.: 600 mA (line)
  • Test voltage: 200 VDC, 2 sec
• Common mode impedance (EUT port)
  • 150 kHz to 30 MHz: 150 Ω ±20 Ω
  • 30 MHz to 80 MHz: 150 Ω ±40 Ω
• Phase angle (EUT port) 150 kHz to 30 MHz: 0° ±20°
• Coupling path (In / Out port / EUT)
  • Connection: BNC 50 Ω
  • RF voltage: <15 V
  • Frequency range: 150 kHz to 80 MHz
• Voltage division factor (RF input to EUT port)
  • 150 kHz to 30 MHz: 9.5 dB ±1 dB
  • 30 MHz to 80 MHz: 9.5 dB ±2 dB
• Transmission bandwidth* (wanted signal) EUT / AE B3 dB: > 100 MHz sin.
• LCL (EUT) *)
  • Cat. 3 150 kHz to 30 MHz (corner frequency 2 MHz): 55 dB to 39.3 dB ±3 dB
  • Cat. 5 150 kHz to 2 MHz: 65 dB ±3 dB
  • Cat. 5 2 MHz to 30 MHz: 65 dB to 49.3 dB +4.5 / -3 dB
• Decoupling of common mode disturbances (EUT / AE)
  • 150 kHz to 1.5 MHz / 30 MHz: ≥35 dB to ≥55 dB / ≥55 dB
• Crosstalk (PSELFEXT) (EUT / AE) 1 MHz to 100 MHz: ≥61 dB to ≥21 dB

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