Letters

I agree with Brad Thompson's comment: "Current FCC regulations don't describe an accurate method for measuring BPL emissions, which may open a market for new test instruments." ("Viewpoint," November 2003, p. 60.)

At our company, we have made our best interpretation of the FCC's existing rules and have bounded the problem of BPL (Broadband Internet over Power Lines) emissions. We have replied to the FCC's Notice of Inquiry on the subject with a white paper that is available on our Web site (www.powercommsystems.com).

After many measurements and analyses, we conclude that a spectral density of –65 dBm/Hz satisfies the FCC rules. In addition, with the HomePlug Alliance (HPA) spectral mask satisfied, many of the approximately 80 carriers used over the range of about 4 to 21 MHz are turned off when licensed carrier energy is detected. This satisfies the interference clause of the general FCC rules.

We believe our brand of accessBPL complies with the FCC rules.

Wayne Sanderson, PhD EE, CEO, GridStream Technologies and PowerComm Systems, Fayetteville, TN