100 to 200 AMP CDN's
FCC's family of CDN's just got bigger. 100 and 200 AMP CDN's are now available for IEC 1000-4-6 conducted immunity testing from 150 kHz to 80 MHz.
Applications
EN 61000-4-6 requires that the EUT be tested from 150 kHz to 80 MHz with the capability to test up to 230 MHz. No test levels have been imposed in the 9 kHz to 150 kHz region because of the low probability of causing electronic systems to fail from with either intentional or unintentional radiators.

The specification has three open circuit voltage levels 1, 3, and 10. These levels have been selected because they represent the mid range of radiated fields.

Coupling and Decoupling Networks
The common mode current disturbance signal can be delivered to the EUT using a variety of coupling networks to inject the signal onto the unscreened cables, shielded cables, balanced cables, coaxial cables and power mains.

Decoupling networks are used to insure that the disturbance signal does not influence the auxiliary equipment and are placed between the EUT and the auxiliary equipment. One decouling network is inductive and uses a high impedance choke. The second decoupling network combines resistive and inductive technique by using ferrite toroids that are placed around the cables connecting the EUT and the auxiliary equipment. These coupling and decouling networks can be separate or combined in the same instrument.

Choosing a CDN
The Coupling/Decoupling Network or CDN incorporates both the decoupling and coupling circuitry in the same housing. The CDN contains integrated direct capacitive coupling along with a high impedance choke for inductive decoulping.

The CDN acts as a low pass filter preventing the susceptibility test signals from interfering with the auxiliary equipment. A family of CDN's are required to match the wide variety electronic instruments, systems, computer, printers and appliances. Fischer Custom Communications, Inc. offers over 35 different CDN's and custom configurations are available. All CDN's maintain the 150 W impedance from 150 kHz to 230 MHz.

Call, FAX or e-mail us today to discuss your IEC 1000-4-6 testing requirements and let the applications engineers at Fischer Custom Communications help you select the right CDN's.

CDN Selection Guide

Specifications

EUT/AE Port
AC Voltage
DC Voltage
Current Rating

C Series


<350 V
<600 V
1.0 amp

S Series


<350 V
<600 V
3.0 amp

M Series


<480 line to line
<600 V
16 amp to 300 amp*

AF Series


<350 V
<600 V
3.0 amp

T Series


<350 V
<600 V
3.0 amp

I/O Connectors
BNC
S2 to S50
Centronics, D Sub min
Multi Contact Safety Socket
Multi Contact Safety Socket
Audio Socket
Multi Contact Safety Socket
Common Mode Impedance at
EUT Connector
150kHz to 26kHz
26kHz to 80kHz
80kHz to 230kHz


150±20 ½
150±60/-45 ½
150±60/-45 ½


150±20 ½
150±60/-45 ½
150±60/-45 ½


150±20 ½
150±60/-45 ½
150±60/-45 ½


150±20 ½
150±60/-45 ½
150±60/-45 ½


150±20 ½
150±60/-45 ½
150±60/-45 ½
Disturbance Coupling Circuit
Frequency Range
Connector
RF Voltage Level


150kHz to 230MHz
50 ½ BNC
<40 V


150kHz to 230MHz
50 ½ BNC
<40 V

150kHz to 230MHz
50 ½ BNC
<40 V


150kHz to 230MHz
50 ½ BNC
<40 V


150kHz to 230MHz
50 ½ BNC
<40 V

Voltage Attenuation generator/EUT

10 dB ± 1 dB

10 dB +1 dB/-3 dB

10 dB +1 dB/-3 dB

10 dB +1 dB/-3 dB

10 dB +1 dB/-3 dB
Insertion Loss EUT/AE

<1 dB at 230MHz

<3 dB up to 20 kHz
<10 dB up to 1 MHz
<20 dB up to 10 MHz
<0.1 dB up to 400 Hz
<8 dB at 10 kHz
<45 dB at 150 kHz
<0.5 dB DC to 20 kHz
<30 dB at 150 kHz
<20 dB at 230 MHz
<8 dB at 150 kHz
<20 dB at 1 MHz
<30 dB at 2 MHz
Coupling Factor

0 dB ± 1 dB

0 dB + dB/-3 dB
0 dB + dB/-3 dB
0 dB + dB/-3 dB
0 dB + dB/-3 dB

Decoupling Attenuation Generator/AE

>50 dB up to 100 MHz
>20 dB at 230MHz

>50 dB up to 20 MHz
>20 dB at 230MHz

 

>50 dB up to 20 MHz
>20 dB at 230MHz

 

>50 dB up to 30 MHz
>20 dB at 230MHz

 

Unbalanced Attenuation Generator/EUT
>70 dB at 150 kHz
>60 dB at 1 MHz
>40 dB at 10 MHz
>35 dB above 20 MHz

M Series: The M1 power line CDN is used to couple common mode CW and modulated signals onto single power line systems. The M1 is ideal for automotive systems using the chassis as the DC return. The M2 is commonly used for 2 wire power conductor cables and the M3 is used for two line single phase cables. The M4 is used on three phase power mains and the M5 is used on three phase systems with neutral and protected earth ground conductors. Fischer Custom Communications, Inc. offers more than 15 powerline configurations with current rating of 16, 25, 32, 50, 100, 200 and 300 amperes.

T Series: The T series CDN is used to couple RF CW and modulated signals into balanced or unshielded lines. It permits normal operation of balanced circuits with impedance to 600 W up to 1 MHz and 1000 W impedance up to 100 kHz. It is available in 2, 4 or 8 line configurations.

S Series: The S series CDN is used to test shielded cables and is available with 2 pins to 50 pins.

C Series: The C series CDN is used to couple RF interference signals onto shields of RF coaxial cables.

AF Series: The AF series is ideal for unshielded audio cables and is available with 2 pins to 50 pins. This CDN allows 600 W systems to operate normally up to 10 kHz and 1000 W systems to operate up to 5 kHz. It is important to review the impedance and frequency of operation of audio systems to insure there is no influence on the CDN

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20603 Earl Street • Torrance, CA 90503 • Tel: (310) 303-3300 • Fax: (310) 371-6268
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