R&S ENY81-CA6
Operation
Operating Manual 1309.8632.14 - 01
10
2.1.2 Radio Disturbance Measurements at Unshielded
Telecommunication 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. On
the R&S ENY81-CA6 EUT side, a longitudinal conversion loss (LCL) of 75 dB is
implemented to simulate operation with a category CAT6 cable.
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-CA6 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
The R&S ENY81-CA6 is also suitable for immunity testing in accordance with IEC
61000-4-6 in the frequency range from 150 kHz to 80 MHz. For this purpose, a 150 -
to-50 adapter (100 series resistor in line with IEC 61000-4-6) is required in order to
calibrate the test system. This series or terminating resistor as well as various adapters
are available as Option R&S ENY-ITS (1309.8955.13) for connecting to the ISN. The
R&S ENY-ITS comes with a detailed description of the reference calibration and test
set-up.
2.3 Connection Terminals
Fig. 3 shows the RJ-45 jack of R&S ENY81-CA6 ISN with EIA/TIA T568B pin
assignment for four symmetrical pairs.
RJ45-JACK
1
8
2 3 4 5 6 7
pair 1
pair 3
pair 2
pair 4
Fig. 3
Connector assignment
