Teseq ISN T8-Cat6 - Rent ISN for Cat. 6 Unscreened Balanced Pairs

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Teseq ISN for Unscreened Balanced Pairs:

  • Designed for up to 4 Category Cat. 6 Pairs
  • Refers to CISPR 22/32 Figure D.3/G
  • Maximum 63 VAC, 100 VDC, & 600mA (line)
  • Measure Common Mode Distrubances
  • ISO 17025 Calibration & 2 Days Free Transit Time

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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-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.

Data Sheet


Frequency range:

150 kHz to 80 MHz

Line parameters:

1 up to 4 pair(s)

Power rating (EUT and AE port)

AC max. voltage (line to ground):

DC max. voltage (line to ground):

Current max.:

Test voltage:


63 V

100 V

600 mA (line), 1200 mA (pair)

200 VDC, 2 sec

Common mode impedance (EUT port)

150 kHz to 30 MHz:

30 MHz to 80 MHz:


150 Ω ±20 Ω

150 Ω +60 Ω /-45 Ω

Phase angle (EUT port) 150 kHz to 30 MHz:

0° ±20°

Coupling path (In/Out port/EUT) Connection:


RF voltage:

Frequency range:


BNC 50 Ω

<15 V

150 kHz to 80 MHz

Voltage division factor (RF input to EUT port)

150 kHz to 30 MHz:

30 MHz to 80 MHz:


9.5 dB ±1 dB

9.5 dB ±2 dB

Transmission bandwidth* (wanted signal) EUT/AE: B3 dB


250 MHz sin. typical

LCL (EUT) *)

Cat. 6 150 kHz to 2 MHz:

Cat. 6 2 MHz to 30 MHz:


75 dB to 74.4 dB ±3 dB

74.4 dB to 59.3 dB +6/-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 250 MHz:


≥61 dB to ≥15 dB

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