I’ll start off by saying I am by no means an RF engineer, so I may be completely wrong about what I am about to write about. I am however, quite confident in my empirical observations over time.<\/p>\n
I got into an interesting conversation about RF interference generated by HFC<\/a> systems – (often touted as an “alternative” to the NBN) – with Gary Stark<\/a> and Dan Warne<\/a> on Twitter on Friday afternoon.<\/p>\n <\/p>\n Gary raised the issue of signal leakage from HFC systems that interfere with terrestrial RF broadcasts – (such as radio, television, emergency communications, etc) – and the discussion led to the thoughts that any proliferation in the use of HFC for internet delivery – (as espoused by some) – would increase the problem, and possibly create others.<\/p>\n Gary highlighted the Bondi<\/a> area of Sydney<\/a> as being particularly RF congested. There are many competing frequencies in the area, that interference is a common occurrence. <\/p>\n This reminded me of my own observations around Geelong<\/a>.<\/p>\n For example, have a listen to the interference caused to a terrestrial radio transmission as I drive past the TransACT<\/a> headquarters – this was recorded on Friday afternoon:<\/p>\n\n
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