Radio Disturbance Measurements At Unshielded Telecommunications Ports; Immunity Testing In Line With Iec 61000-4-6 - R&S ENY81 Manual Del Usuario

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R&S ENY81 Operation
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2.1.2 Radio Disturbance Measurements at Unshielded
Telecommunications Ports
The limits of conducted common-mode disturbance voltages at telecommunications
ports are defined in CISPR 22.
To determine the radio disturbance characteristics with the unshielded
telecommunications line intended for operation, the EUT must be operated with an LCL
which corresponds to the cable category specified by the equipment manufacturer. For
this purpose, 55 dB adapters (for cable of category 3) and 65 dB adapters (for cable of
category 5) are used.
For the measurement of the asymmetric (common-mode) disturbance voltage, the
output level at the receiver port (BNC connector) is measured with a test receiver in
line with CISPR 16-1-1. The R&S ENY81 comes with a table containing the voltage
division factor. The magnitude of the voltage division factor in dB must be added to the
measured output voltage to obtain the common-mode voltage at the EUT port. For this
purpose, the frequency response of the voltage division factor can be entered in the
test receiver or – if suitable test software is used – in the processor and used as
transducer factor.

2.2 Immunity Testing in Line with IEC 61000-4-6

Due to its internal design, the basic network is generally not suitable for immunity
testing in line with IEC 61000-4-6.
Operating Manual 1309.8649.14-01 10