COM-power corporation T-Series Instruction Manual - Page 7
Browse online or download pdf Instruction Manual for Test Equipment COM-power corporation T-Series. COM-power corporation T-Series 12 pages. Shielded coupling/decoupling networks
5.0 CDN Requirements
5.1
Overview
Com‐Power shielded CDN‐T series Coupling/Decoupling Networks are designed specifically
for conducted immunity testing per IEC 61000‐4‐6.
The shielded CDN‐T series is used for shielded ethernet lines 10/100/1000 mbps.
These CDNs
•
Provide a means of coupling RF common mode signals to the above line types.
•
Provide the required common mode impedance between the these lines and ground
necessary for proper performance of the testing. impedance to the equipment under
test independent of the auxillary equipment common mode impedance.
•
Minimize interference to the auxillary equipment via common mode decoupling of
the disturbing signals.
•
Provide uninterrupted communinication between the EUT and auxillary equipment.
The Com‐Power shielded CDN T series fully comply with the requirement contained in the IEC
61000‐4‐6 and CISPR 16‐1‐2.
5.2
CDN Parameters
5.2.1 Common Mode Impedance
Common mode impedance is defined as the "ratio of common mode voltage and common
mode current at a certain point". The common mode impedance requirements for a CDN
must be met with CDN auxillary equipment input power terminals open or short circuited to
ground.
5.2.2 Voltage Division Factor
Voltage division factor is the amount of voltage that is lost between the RF input terminal of
the CDN and the EUT port and is measured through a 150Ω to 50Ω adapter (ADA‐515)
connected to the EUT port.
5.2.3 Coupling Factor
The CDN coupling factor is defined as the ratio given by the open circuit voltage (e.m.f)
obtained at the EUT port of the coupling (and decoupling) device divided by the open circuit
voltage obtained at the test generator.
19121 El Toro Rd ● Silverado, California 92676 ● (949) 459‐9600● com‐power.com
Shielded T‐series Coupling/Decoupling Networks (CDN)
Page 7 of 12
INSTRUCTION MANUAL
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