Japan Radio Co. JLR-7900, Instruction Manual

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6-2
6.1
GPS Sensor Installation
6.1.1 Selecting the Position for Installation
When connecting the cable attached to the sensor, do not bend it acutely, twist it, or
impart excessive force. Doing so sometimes causes cracks or damage to the
coating, resulting in fire or electric shock.
Do not install the sensor where there is excessive vibration.
Vibration may cause sensor failure.
Do not paint the sensor.
Doing so may result in reception problems.
Do not install the sensor where temperature exceeds 55

C and there is covered
with exhaust gas from funnel.
Doing so may result in equipment failure or malfunction.
The junction box rubber gaskets (25 f Gland side) fit

10mm - 20mm cables.
Install the sensor where there are no obstacles, in order to ensure that GPS signals
can be directly received from satellites without interference or reflection of signals
from surrounding objects.
Whenever possible, select a place with the following characteristics.
If it is difficult to find an ideal site, select a place temporarily and install the equipment.
Conduct a test to make sure that the proper performance can be obtained and then fix the
equipment in position. If it is installed at an improper place, reception accuracy may be
impaired.
To connect the sensor other than JLR-4341/4340, set the supply voltage of the display
unit to 12 VDC (10.8 to 15.6 VDC) for use. Failure to do so causes fire, electric shock or
failure.
1. An open space, which allows uniform reception of satellite signals.
2. Far away from any high power transmission antennas.
3. Outside radar beams.
4. Away from the INMARSAT antenna by at least 5 meters and outside the
INMARSAT beam.
5. Away from the antenna of a VHF transmitter and a direction finder by at least 3
meters.
6. Away from a Magnetic Compass by at least 1 meters.
7. Away from amateur radio antennas by at least 3 meters.
WARNING
CAUTION