Com-Power CDN-AF4, Manual

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Model CDN -AF4
Theory of Operations
This section includes the following
n Overview
n Typical Test Setup
3.0 Overview
This describes the typical test setup for making measurements
using the CDN. Please read safety precautions in this manual
before proceeding.
3.1 Typical test setup
The IEC-1000-4-6 requires that an appropriate coupling
decoupling networks (CDN) with defined common mode
impedance must be connected the various cables connected
to the EUT. The AF series CDN are only appropriate for cables
with multiple unshielded conductors. Other types CDN may be
necessary to couple and decouple different types of cables
that may connected to the EUT. Such as coax, shielded cables,
and powerline. Please see connection diagram below for typical
conducted immunity test setup using the AF series CDNs.
3
3-1
Figure 3-1 Conduted Immunity test setup using S series CDNs
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EUT
AE
DIRECTIONAL
COUPLER
POWER METER
12345
12345
12345
CDN
AF ser.
FROM MAINS
DISTURBING
VOLTAGE SOURCE
EUT POWER
UNSHIELDED CABLE
AE
100 mm insulating support
123
123
123
Ground Plane
FORWARD POWER
PORT
CDN
M ser.
50 Ohm TERMINATOR
ON INPUT
TO CDN INPUT