Marmitek SW12 User Manual page 5

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 switched 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.
Hereby make your house Marmitek X-10 compatible for these units. The FD10's will not only
filter but will also couple the phases (please see 1).
SW12™ 5