36
JLR-7700 MK2 GPS Navigator
3.5 Measures for the Electromagnetic Interference
The equipment needs to be installed properly in order to ensure its successful operation even though it has
been designed to satisfy the requirements stipulated by the electromagnetic compativility (EMC).
Several factors that can affect the equipment performance are shown below.
3.5.1 Checks before the Connection
Observe the following instructions to avoid possible electromagnetic interference when connecting a cable
(DGPS receiver, power supply, or data output cable) to the equipment.
・ Keep the equipment away from another equipment by a minimum of 1 meter that is transmitting the high
frequency signals or the cable transmitting such signals. Some examples of such equipment include the
VHF transmitter and receiver and cable antenna. Secure the minimum distance of 2 meters in case the
equipment needs to be installed nearby the SSB transmitter and receiver.
・ Keep the equipment away from the radar beam by a minimum of 2 meters.
In general, the radar beam is understood to be diverging from its source in the range of 30 degrees above
and below its center axis (a total of 60 degrees).
・ Do not use the power supply to start the engine as the power supply for the equipment.
The equipment may be reset if its power supply voltage drops below 10 VDC, which in turn may result in the
loss of some data or change in the operation mode even though the equipment itself will not be damaged.
・ Use only the cables specified by us. The cable may fail to satisfy the EMC performance requirements if it is
cut or reconnected after cutting. Thus, the cable should never be tampered unless otherwise specified in the
instruction manual.
3.5.2 Checks before the Navigation
・ Check the equipment before starting the navigation that it is free from any problems related to the radio
communication, starting the engine, battery voltage, and so on.
・ The equipment may be affected by the external factors. In general, the equipment will not be damaged due
to such external factors, however, it may be reset or malfunction momentarily.
To Next Page
Loading...
