User's Manual

©e2v technologies (uk) limited 2010 107553 09 Aug 2010 DAS762156AA (UK) Version 11, page 51
16. Can I change the antennas on the receiver?
Changing the receiver antenna may cause an infringement of regulatory requirements. The
receiver antenna should only be replaced with an alternative antenna that has a gain of up to 3
dBi. The LRT receiver allows the use of either the straight antennas or any two of the three in the
receiver station lid shown below. Further details are given in section 8 dealing with the LRT
system.
17. How do I get the maximum performance from my Wi-Fi system?
The location of the receiver unit or router should be considered carefully to ensure that there is as
clear a path as possible to the camera and transmitter. This may involve being outside of a vehicle
or selecting an alternative receiving access point, router or network adaptor.
Where a higher power signal is permitted (e.g. USA) and the user is choosing the receiver unit, it
is more beneficial to choose a high gain antenna over a higher RF power. Higher power will not
improve reception from the camera; using a lower power with a commensurately larger antenna
will give better results. If the antenna is directional, this should be pointed towards the camera.
Always check the product documentation to ensure that the resulting system is legal for operation
as intended.
Normally little can be done to the transmitter performance or location as this is attached to the
camera. As the camera transmissions are standard Wi-Fi, there are a number of ‘extender’ or
‘relay’ product accessories available from the usual Wi-Fi manufacturers and retailers that may be
of use. In a known location it may be desirable to change wireless channel to avoid any
interference sources, see FAQ 25.
18. What affects the transmitter range?
The Wi-Fi range given in the specification of 300 m is for a clear unobstructed path, for example
an open field. Penetration into a building will depend greatly upon the construction of the particular
building, with concrete and stone walls being most problematic. The presence of interference may
also have the effect of reducing range.