Marmitek TM13 Guide Utilisateur page 5

2. It is possible that Marmitek X-10 signals are attenuated by devices and lights which
are connected to the power line. In a normal home situation this effect is negligible
(the Marmitek X-10 system is using active gain control to eliminate the effects).
However, it is possible that a particular device in your house is attenuating the sig-
nals so much that the range of Marmitek X-10 signals is decreased significantly.
When you have range problems, it is wise to try to locate the device which is atte-
nuating the signals simply by unplugging devices from the power line, and testing
the differences in range for your Marmitek system. When e.g. your conclusion is that
e.g. your computer monitor is attenuating the signal, you can use a FM10 Plug-in
Filter between the power line and the monitor to eliminate the effects.
Known devices which can cause attenuation are:
PC Monitors
PCs with heavy internal power supplies
Old Televisions
Copiers
Fluorescent Lights
Gas Discharge Lamps (Energy Saving Lamps)
3. Some (old) devices are able to disturb the signal by transmitting noise on the power
line. Because the Marmitek X-10 signals are transmitted on 120 kHz, only noise on
or near this frequency will have influence on the range. When you use a FM10 Filter
to connect this device to the power line, the noise will be filtered.
4. The Marmitek X-10 protocol has several mechanism to avoid modules to be swit-
ched on or off by other sources than your Marmitek X-10 Controllers. However, it is
possible that the Marmitek X-10 signals are disturbed by e.g. baby phones which are
in TALK mode (continuous transmission). When these kind of signals are present on
the power line it is possible that the Marmitek X-10 signals will not come through.
5. The mains do not stop at the front door of your home. Everything that is attached
to mains nearby your home can have influence on Marmitek X-10 signals (e.g. heavy
machinery). If you think that your system is influenced by devices out of your house,
it is advisable to install FD10 Phase Coupler/Filter on each phase entering the house.
These filters will block signals coming into or going out of your house, but will also
match the impedance for the mains. The FD10's will not only filter but will also cou-
ple the phases (please see 1).
TM13™ TRANCEIVER MODULE 5