Tag Archives: Shortwave Radio Jamming

North Korea intensifies shortwave jamming

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(Source: DailyNK via Andrea Borgnino)

North Korea has been from the beginning of March continually signal jamming radio broadcasts on the shortwave frequency used by the South Korean non-profit broadcaster Unification Media Group (UMG). Given the present situation, in which North Korean residents might be influenced by outside information condemning the regime and explaining the purpose of the sanctions imposed by the United Nations, the regime has showed the will to block sources of outside information that might cause unrest.

The shortwave frequency […] in question, 7515 [kHz], has been actively jammed starting on March 1st making it extremely difficult for North Korean listeners to tune in. On the 15, UMG organization began using three receivers to test out reception at that and adjacent frequencies on a daily basis and was able to confirm that the exact signal is being jammed.

The blocking effort is being concentrated on the time period from 10pm- midnight. Specifically, from 10-11pm the jamming is very strong. The signal jamming is undetectable from midnight to 1am. The signal blocking became weaker at midnight on March 15, from which point onward the entire three hour broadcast was audible. Starting on the 17, UMG moved the frequency, but the jamming operators seemed not to notice because the interference continued on the old wavelength.

Continue reading at the DailyNK online…

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Empire of Noise: a documentary about jamming

Many thanks to SWLing Post contributor, Gary Wise (W4EEY), who writes:

I stumbled over an interesting documentary on radio jamming. You have probably seen it, but just in case you haven’t, here is a link.

I had not seen this before, Gary.  Thank you!

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BBC World Service program discusses Chinese jamming

BBCSWOverToYouIn the latest episode of Over To You, host Rajan Datar discusses how the BBC World Service’s shortwave transmissions are being affected by jamming in parts of Asia. It’s a short but informative episode.

Even Datar and his guest, Nigel Fry (Head of Distribution for BBC Global News), could appreciate the irony that while China is investing a substantial number of resources in jamming BBC WS English broadcasts, the BBC World Service is voluntarily trimming their English offerings anyway. What a gift to those in China trying to control access to the global press!

Thanks to the Southgate ARC for the tip.

(Source: Over To You)

Over To You explores the way that the World Service’s shortwave transmissions are being affected by jamming in parts of Asia, following up from an email from a listener in West Bengal who was having problems listening to the service. With the help of the World Service’s head of business development, we find out how jamming of the World Service shortwave transmissions inside China is spilling over into neighbouring countries, and explore what the BBC can do to redress the situation through international organisations.

Click here to listen to the full interview.

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