Emc Guidelines; Suppression Ferrites - Raytheon ST60 Owner's Handbook Manual

Chapter 2: Installation

EMC guidelines

All Raytheon equipment and accessories are designed to the best
industry standards for use in the leisure marine environment.
Their design and manufacture conforms to the appropriate
Electromagnetic Compatibility (EMC) standards, but correct
installation is required to ensure that EMC performance is not
compromised. Although every effort has been taken to ensure that they
will perform under all conditions, it is important to understand what
factors could affect the operation of this product.
To minimise the risk of operating problems:
• All Raytheon equipment and cables connected to it should be:
• At least 1 m (3 feet) from any equipment transmitting or cables
carrying radio signals, e.g. VHF radios, cables and antennas. In
the case of SSB radios, the distance should be increased to
2 m (7 ft).
• More than 2 m (6 ft) from the path of a radar beam. A radar beam
can normally be assumed to spread 20
radiating element.
• Voltage drops below 10 V in the power supply to our products can
cause the equipment to reset. This will not damage the equipment,
but will cause the loss of some information and can change the
operating mode.
• Genuine Raytheon cables should be used at all times. Cutting and
rejoining these cables can compromise EMC performance and so
should be avoided unless doing so is detailed in the installation
manual.
• If a suppression ferrite is attached to a cable, this ferrite should not
be removed. If the ferrite has to be removed during installation it
must be reassembled in the same position.

Suppression ferrites

The following illustration shows the typical range of suppression
ferrites fitted to Raytheon equipment. Always use the ferrites specified
by Raytheon.
o
above and below the
9