Radio Interference; Speaker Damage - Lab.gruppen PLM series Operation Manual

3.3.3 Radio interference

A sample of this product has been tested and complies with the limits for the European Electro Magnetic
Compatibility (EMC) directive. This equipment has also been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference from electrical equipment. This product uses radio frequency energy
and if not used or installed in accordance with these operating instructions, may cause interference to other
equipment, such as radio receivers. However, there is no guarantee that interference will not occur in a
particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment on and off, the user is encouraged to try to correct the interference by one or
more of the following measures:
▸ Reorient or relocate the antenna.
▸ Increase the separation between the equipment and receiver.
▸ Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
▸
Check if the affected unit complies with the EMC limits for immunity, (CE-labeled). If not, address the
problem with the manufacturer or supplier. All electrical products sold in the EC must be approved for
immunity against electromagnetic fields, high voltage flashes, and radio interference.
▸ Consult the dealer or an experienced radio/TV technician for help.

3.3.4 Speaker damage

Your PLM Series device is very powerful and can be potentially dangerous to both loudspeakers and
humans alike. Many loudspeakers can be easily damaged or destroyed by overpowering them. Always
check the speaker's continuous and peak power capabilities. Although the PLM's attenuators can be used to
reduce the overall gain, an increase of the input signal can result in full output power, which may cause
damage to connected speakers.
3.3.5 Maintenance
For safe and reliable operation, the dust covers behind the front panel should be cleaned regularly. If the
dust filters are not maintained there will be safety risks. For example the unit can ignite the dust and a fire
will occur due to high internal temperatures. There is also a risk that the unit will malfunction since it is
dependent on constant airflow from front to rear. If the dust filters are not clean and the unit malfunctions,
any resultant problems will not be covered by the warranty.
PLM Series Operation Manual rev 1.1.3
3. Warnings
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