Antenna Mounting And Eme Exposure; Wireless Product Location Requirements - Raymarine RAY90 Installation And Operation Instruction Manual

Antenna mounting and EME exposure

Ensure that your VHF antenna is connected to the radio before transmission.
Raymarine® declares a Maximum Permissible Exposure (MPE) radius of 1.8 meters (5.9 ft.) for this
system, assuming 25 watts output to an omnidirectional antenna of 3dBi gain or less.
For watercraft with suitable structures, the antenna base must be at least 3.8 meters (12.5 ft) above
the main deck to meet the MPE for persons up to 2 metres (6.6 ft) tall. For watercraft without such
structures, the antenna must be mounted so that its base is a minimum of 1.8 meters (5.9 ft.) vertically
from heads of all persons.
The antenna must be isolated from the vessel's metalwork using an insulated (e.g. plastic) mounting
bracket.

Wireless product location requirements

The optional wireless hub, handset and active speakers require further considerations when
selecting a mounting location
Wireless location requirements
A number of factors can influence wireless performance, it is important to ensure you test the
connection performance, at the desired location before installing wireless enabled products.
Distance and signal strength
The distance between wireless products should always be kept to a minimum. Do not exceed the
maximum stated range of your wireless product (Maximum range will vary for each device).
Wireless performance degrades over distance, so products farther away will receive less network
bandwidth. Products installed close to their maximum wireless range may experience slow
connection speeds, signal drop outs or not being able to connect at all.
Line of sight and obstacles
For best results the wireless product should have a clear, direct line of sight to the product it will be
connected to. Any physical obstructions can degrade or even block the wireless signal.
The construction of your vessel can also have an impact on wireless performance. For example,
metal structural bulkheads and roofing will reduce and in certain situations, block the wireless signal.
If the wireless signal passes through a bulkhead containing power cables this can also degrade
wireless performance.
Reflective surfaces such as metal surfaces, some types of glass and even mirrors can drastically
effect performance or even block the wireless signal.
Interference and other equipment
Wireless products should be installed at least 1m (3 ft) away from:
• Other wireless enabled products.
• Transmitting products that send wireless signals in the same frequency range.
• Other electrical, electronic or electromagnetic equipment that may generate interference.
Interference from other peoples wireless products can also cause interference with your products.
You can use a wireless analyzer tool to assess the best wireless channel (channel not in use or
used by least amount of devices) for you to use.
Installation 29