ARLA/CLUSTER: Anunciado novo standard para o sistema PLC muito mais poluidor do espectro radio-electrico

[João Costa > CT1FBF]

New PLC Standard announced

The new standard for *Power Line Communications* (PLC) using frequencies
above 30 MHz has now been completed. PLC devices can cause severe pollution
of the precious radio spectrum

CENELEC Committee TC210 WG 11 has completed the standard for in-house PLC
devices which operate above 30 MHz. The first standard in the family - the
now in-force EN 50561-1 - covers the frequency range up to 30 MHz and was
debated heavily amongst radio users. It does safeguard the broadcast,
amateur and aeronautical frequencies, but spoils the rest of the spectrum
for local use. The reason for that is the fairly high emission limit of 110
dBµV.

The now positive voted EN 50561-3 covers measurement setup and limits for
frequencies above 30 MHz, while devices which also operate on the low band
(which is the usual case) still need to comply with EN 50561-1 or show
compliance via an alternative route. A fairly low emission limit value
between 85 and 80 dBµV (depending on frequency) was set in EN 50561-3, and
additionally the amateur bands (50 - 52 MHz and 70.0 - 70.5 MHz) were
notched down to 55 dBµV. This coming standard will again help to stabilize
the situation of PLC coexistence and at least to keep the amateur spectrum
clean.

Source: IARU Region 1 http://iaru-r1.org/

The EN 50561-3 standard is mentioned on the Interference website at
http://interference.org.uk/forum/showthread.php?tid=342

The UKQRM Yahoo discussion group is at
http://groups.yahoo.com/group/UKQRM/
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