Keysight N4391B Getting Started Manual page 10

1 Introduction
WARNING
WARNING
WARNING
WARNING
10
The recycling symbol indicates the general ease with which
the instrument can be recycled.
The C-Tick mark is the certification mark of the Australian
Communications Authority.
The CE mark is the conformity marking of the European
Community.
The CSA mark is the certification mark of the Canadian
Standards Association.
The earthing symbol marks a connection that is connected,
through the instrument, to the earth of the line power.
If this product is not used as specified, the protection provided by the equipment
could be impaired. This product must be used in a normal condition (in which all
means for protection are intact) only.
No operator serviceable parts inside. Refer servicing to qualified service
personnel. To prevent electrical shock do not remove covers.
This is a Safety Class 1 Product (provided with protective earth). The mains plug
shall only be inserted in a socket outlet provided with a protective earth contact.
Any interruption of the protective conductor inside or outside of the instrument
is likely to make the instrument dangerous. Intentional interruption is prohibited.
To prevent electrical shock, disconnect the instrument from mains before
cleaning. Use a dry cloth or one slightly dampened with water to clean the
external case parts. Do not attempt to clean internally.
Keysight N4391B Optical Modulation Analyzer Getting Started Guide