Introduction:
CAT5 8158 is produced by Germany Schwarzbeck and authorized by Shenzhen EUTTEST agent sales T8-ISN that is, 8-wire impedance matching network, it can test 4 pairs of wires UTP, the design principle in line with the requirements of the standard CISPR 22 edition 5.2-figure D.3 ( LCL = 65 dB ), the design schematic diagram is shown below:

schematic design
The ISN CAT58158 also allows common mode interference voltage measurements to be performed on unprotected twisted pair UTPs or communication ports with 2, 4, 6, or 8 conductors. The device under test, EuT, or auxiliary equipment, AE, can be connected using an RJ-45 jack. Pin assignments follow EIA/TIA-T568A/B.
The CAT58158 is also compliant with the AAN device requirements of CISPR32, details of which can be found by clicking on the link below:
How to select ISNs and AANs by test standard requirements?
Technical parameters:
Product Specification Sheet:
“Reminder: swipe tables left and right”typ.: < 2.5 dB 30 MHz to 250 MHz
CISPR 22, Appendix D, Fig. D.3
49 dB @ 30 MHz
Technical data charts:

The connectors can be adapted to a wide range of network cables

S21 Curve Diagram

LCL Longitudinal Conversion Loss CISPR22 compliant

voltage divider

impedance

phase (waves)
EUTTEST is an official authorized distributor of SCHWARZBECK, whose full official name is: SCHWARZBECK MESS - ELEKTRONIK OHG
Ltd. is authorized by schwarzbeck to sell all products in China and provide technical service for the products sold.

Schwarzbeck Product List Schwarzbeck
CAT3 8158 Schwarzbeck
NSLK 8128 Schwarzbeck
NNLK 8129 Schwarzbeck
NNLK 8121 Schwarzbeck
NSLK 8127 Schwarzbeck
NNLK 8130 Schwarzbeck
NNHV 8123-200 Schwarzbeck