Manual Marmitek LM15 (page 4 of 28) (English, German, Dutch, French, Italian, Spanish)

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4 © MARMITEK

1. When more than one phase is used for your electrical system, it is necessary to couple

these phases for the Marmitek X-10 signals. For coupling you can use FD10 Phase

Couplers/Filters. You only need to install a Phase Coupler/Filter when your wall outlets and

light switches are divided over more than one phase (more than one group is no problem).

For bigger buildings or longer distances we advice you to use an active repeater instead of

passive FD10’s.

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 pos-

sible that a particular device in your house is attenuating the signals 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 attenuating 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

PC’s 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 fre-

quency 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 (continu-

ous 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 couple the phases (please see 1).

FAQ

What is the reason for modules to switch on/off spontaneously?

It is possible that a Marmitek X-10 System is installed at one of your neighbours using the

same House Code. To solve this problem try to change the House Code of your system, or

have FD10 Phase Coupler/Filter installed at your incoming mains.

My modules will not respond to my controller.

Make sure that the House Code on all Modules and Controllers are set to the same House

Code (A .. P).

LM15.qxd 03-11-2006 13:45 Pagina 4

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Marmitek LM15 Manual

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