We must demand a Federal investigation into the Environmental pollution caused by the BPL/PLC backbone of the so called smart grid…..Sandaura
Moreover, the report asserts that the field emission requirements for PLT should be somewhat more restrictive than the 20 dBμV/m limit because the PLT signal might be an ”always on” signal, and the geographical concentration of PLT units within a certain area might be fairly high.
NTIA Report 04-413
POTENTIAL INTERFERENCE FROM
BROADBAND OVER POWER LINE (BPL)
SYSTEMS TO FEDERAL GOVERNMENT
RADIOCOMMUNICATIONS AT 1.7 – 80 MHz
Phase 1 Study
FF.4 REGIONAL DEPLOYMENT MODEL
In order to assess the aggregated electrical field strength arising from future,
wide-scale deployments of BPL systems, a regional deployment model for BPL networks is proposed herein.
The model characterizes the number and distribution of active BPL
devices across the entire United States. Among other things, the results of this model will be used to characterize the effect BPL systems have on distant federal communication systems due to any increase in background noise level as a result of ionospheric propagation of unintentional BPL radiated emissions. This will also help address concerns that other countries may have with deployment of BPL systems in the United States.
Page B2 shows links to videos of countries testing BPL
Austria Video Showing Effect of PLC in Tirol, Austria
AUSTRIA: During an emergency exercise of the Austrian
Red Cross in May 2003, communication was massively disturbed by PLC, with interference levels exceeding the limits by a factor 10,000.
In October 2001, FICORA measured disturbance levels in the PLC test network in a residential area. The measurements revealed that data transmission caused a significant rise in disturbance levels inside buildings, and outside near buildings and underground cables. The measured levels were significantly higher than NB30.
“On Radio Interference Assessments of Access PLC System,” JARL/Japan.
Measurements were conducted to evaluate the impact of overhead access PLC to the
amateur radio service and broadcasting service. Three cases were examined. First, the
S/N of an AM signal and SINAD of a CW carrier were measured, and the results showed
unacceptable degradation of HF broadcasting services from PLC interference. Second,
observation using a spectrum analyzer showed that the HF broadcasting signal was
completely jammed by the BPL modem operation. Third, measurement of the far-field
component showed that short wave radio was jammed by the PLC signal at 156 meters
away, and the PLC signal became undetectable at a distance of 200 to 400 meters. The
experiment concluded that access PLC systems jam HF broadcasting and other radio
“Interference measurements in HF and UHF bands caused by extension of power line
communication bandwidth for astronomical purpose,” Japan. Two sets of modems,
spread spectrum and OFDM, of the access PLC system were tested for the interference
effect to radio astronomical observation. It was found that in the HF band, the PLC noise
exceeds the level of the galactic noise by more than 30 dB when the two systems were
180 meters apart. In the UHF band, spurious emission near 327 MHz was observed at a
55 meter distance. In both cases, the interference noise exceeds the limit in ITU-R Rec.
RA 769-1 for protection of radio astronomical observation. Safety separations to meet
RA 769-1 limit are estimated to be 219 km and 12 km at 9.2 MHz and 327 MHz,
respectively. The report concluded that PLC is harmful to radio astronomical observation in both the HF and UHF bands.