Specifications

Profiles

devolo dLAN AVpro manager

3.3.2 Setting transmitting power

dLAN devices transmit their data according to the current HomePlug AV stand-

ard in the frequency band between 1.8 and 30 MHz (or 68 MHz for dLAN 500

AVpro devices). The emission of these signals via the power cables used for

transmission can in some circumstances disrupt other sensitive services (such as

amateur radio), which work in this frequency band. For that reason, in transmit-

ting power management, you can attenuate or even completely block certain

carrier frequencies and frequency bands ('notching') in the dLAN devices' trans-

fer bandwidth in order to eliminate their disruptive effects.

If dLAN is transmitted over coax lines ('Coax mode'), no radiation can be emitted

due to the design, but interference in the frequency band above 30.0 MHz is

conceivable. If such interference occurs here, you should use a coaxial filter.

Clicking on transmitting power opens a diagram which shows you the complete

frequency band occupied by HomePlug AV devices on the X axis and the current-

ly set attenuation levels in this frequency band on the Y axis. Values > 0 dB are

not possible.

In the frequency input field, enter the frequency band for which the attenuation

is to be changed in the format "xx.x - yy.y". Then establish the desired attenua-

tion in the next input field to the right, Lowering [in dB]. The size of the attenu-

ation always has to be entered relative to normal transmitting power (=0 dB

attenuation/gain).

Because the dLAN AVpro manager user interface is structured in accordance

with international requirements, it uses a dot for the entry of decimal breaks

instead of a comma. If decimal breaks are entered with a comma, the dLAN

AVpro manager automatically changes the comma to a dot.