ISN / T-Networks

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  • NTFM 8131 A

 

NTFM 8131

The "Impedance Stabilisation Network NTFM 8131 A", also known as T-ISN, is used to measure the asymmetrical interference voltage on symmetrical data or telecommunication lines. Since 2002 the T ISN is used for measurements of the asymmetrical disturbance voltage according EN 55015 (electrical lighting equipment). Furthermore it can be used for measurements according to CISPR 32. In contrast to the widely used T-ISN the NTFM 8131 A was designed to withstand 400 V AC a maximum current of 3 A.

 

 

Frequency Range: (9 kHz) 150 kHz - 30 MHz
Impedance (asymm.): 150 Ω ±20 Ω
Phase (asymm.): 0° ± 20°
Voltage Division Ratio for asymmetrical voltage:  10 dB +/- 1.5 dB
EUT, AE Terminals: 4 mm jacks
Measuring Port: 50 Ω BNC
Max. Voltage: 400 V AC
Max. Current: 3 A

Insertion Loss
(Differential Mode):

< 3 dB (100 Ω sym.)
Dimensions: 119 mm x 250 mm x 105 mm
Weight approx.: 1.5 kg
According to standards:

CISPR 16-1.2
CISPR 32
CISPR 15

 


Datasheet NTFM 8131 A

 


 
  • Schwarzbeck NTFM 8158 ISN CAT6

 

NTFM 8158

 

ISN T8 CAT6 (LCL = 75 dB) acc. CISPR 22 edition 5.2

figure D.3. for up to 4 pairs UTP.

 

Datasheet NTFM 8158

 

 


 
  • Mag Base 8158

 

8158 Mag Base

 

Magnetic fixture for NTFM 8158

 

The magnetic fixture „8158 Magbase“ can be used to fix a NTFM 8158, a CAT5 8158 or a CAT3 8158 to a steel wall vertically. It is capable of holding approximately 2.5 kg whereas the ISN mentioned above weigh not even 500 g.

 

Datasheet 8158 Magbase

 


  • Schwarzbeck CAT5_8158 ISN

 

CAT5 8158

 

ISN T8 CAT5 (LCL = 65 dB) acc. CISPR 22 edition 5.2, figure D.3. for up to 4 pairs UTP.

 

Datasheet CAT5 8158

 


  • Schwarzbeck CAT3 8158 - 8-wire ISN CAT3

 

CAT3 8158

 

ISN T8 CAT3 (LCL = 55 dB) acc. CISPR 22 edition 5.2, figure D.3. for up to 4 pairs UTP.

 

Datasheet CAT3 8158

 


  • Schwarzbeck ISN-S8 Impedance Stabilisation Network

 

ISN S8

 

ISN for screened RJ45 or RJ11 connections, 2, 4 or 8 wire, acc. D.11 CISPR 22 Ed.5.2.

 

Datasheet ISN S8

 


  • Schwarzbeck ISN-S1 Impedance Stabilisation Network

 

ISN S1

 

ISN acc. CISPR 22 Ed.5.5:2006, Annex D, D9 for coaxial lines

 

pdficon small Datasheet ISN S1