L3 NARDA PMM 9010, User Manual

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2-4 Installation
Fig. 2-1 PMM 9010 initial screen showing the results of the initial self-test
and the five main function keys menu.
2.11 Using an Artificial
Mains Network
(AMN or LISN)
When the PMM 9010 receiver is connected to a LISN to perform conducted
interference measurements of the EUT, the RF output of the LISN shall be
connected to the RF input of the receiver. In order to switch automatically
between the lines of the LISN, it shall be connected to the User Port of the
receiver thanks to the dedicated cable supplied with the LISN .
Using PMM 9010 Software Utility it is possible to carry out an automatic
measurements on all mains lines and get the worst case.
In order to avoid the unwanted tripping of the protection devices, an
insulation transformer shall always be used between the mains supply
and a LISN.
2.12 Using the Pulse
Limiter
The built in pulse limiter is a useful device to protect the input of the receiver
from transient over voltages. Sometime the conducted disturbances entering
the receiver through the LISN are too high - even if they cannot be seen on
the PMM 9010 because they are out of measurement bandwidth - and the
associate energy is high enough to damage the input circuit.
The pulse limiter shall be used only as a protection of the input from
unexpected pulses.
When using an external Artificial Mains Network, to reduce the
probability of damages caused by transient voltage pulses always
disconnect the PMM 9010 RF input before switching Equipment Under
Test supply ON or OFF.