RSGB vDSL Survey Results

The RSGB EMC Committee received submissions from over 1,200 radio amateurs who took part in the VDSL RFI survey. The results have been analysed and were presented at the RSGB 2017 Convention.

Summary Results

  • Over half of responses have evidence of received VDSL interference:
    • 50% receive  level changes of 6dB or more (including 25% showing level changes of >12dB) at VDSL band transitions
    • 14% of respondents found combs of carriers after transmitting causing interference to VDSL and amateur reception
  • Upstream interference was higher than downstream and overhead feeds higher than underground

The survey results have been sent to Ofcom and BT Openreach and a meeting is planned with Ofcom to discuss further testing.

Powerpoint Presentation -