Introduction：
NTFM 8131 is a conductive emission test ISN impedance stabilization network for CISPR 15 control terminals manufactured by Schwarzbeck, Germany and authorized for sale by EUTTEST Shenzhen, generally used to connect the positive and negative power cables of the test EUT. ISN NTFM 8131 complies with the standards CISPR 22 D1, EN55015-2002, CISPR 32, CISPR 15. 32, CISPR 15. the circuit schematic is shown below:
Circuit schematic for NTFM 8131
The "Impedance Stabilization Network", also known as T-LISN, is used to measure asymmetrical interference voltages on symmetrical data or telecommunication lines. Since 2002, the T-LISN is used to measure asymmetrical EN 55015 (electrical lighting equipment) interference voltages. In addition, it can be used for measurements according to CISPR 32 and CISPR 15. In contrast to the widely used T-LISN, the NTFM 8131 is designed to withstand 400 V AC with a maximum current of 3 A. The NTFM 8131 can be used in a wide range of applications.
The NTFM 8131 has been discontinued, please purchase the latest model: NTFM 8131A
We also offer more available ISN impedance stabilization networks and AAN asymmetric artificial networks to choose from. Click on the links below to find out:
How to select ISNs and AANs by test standard requirements?
Technical data of the NTFM 8131:
| Model number | NTFM 8131 |
| manufacturer | Schwarzbeck |
| Device name | 2-wire ISN impedance stabilized network |
| Frequency range | 9kHz-30MHz |
| insertion loss | typ.: <1 dB 3 MHz typ.: <1.5 dB 10 MHz typ.: <4 dB 30 MHz |
| decoupling | >20 dB typ.: >50 dB |
| LCL longitudinal conversion loss | 70 dB typ. 10 MHz: >60 dB typ. 30 MHz: >45 dB typ. |
| partial pressure coefficient | 9.6dB |
| Maximum EUT voltage | 400V AC |
| Maximum EUT current | 3A |
| Meet the standard | CISPR 32 CISPR 15 EN 55015 |
Technical data charts:
NTFM 8131 BNC Port S21 Curve Diagram
Common Mode Impedance Curve for NTFM 8131
LCL Longitudinal Conversion Loss Curve for NTFM 8131
