For homonymous articles, see Neva (disambiguation). This article is a draft concerning broadcasting.
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A blue-toned radio night or licensing night (NEVA) is, in the CSA's vocabulary, a night in which radio frequencies are reshaped in a region.
On a blue night, all or part of the frequencies are flat.
At previous NEVAs, all transmitters were switched off, this is no longer the case, only transmitters whose technical characteristics are changed, frequency change or transmission site are stopped.
Typically the break is done at 0:00 for a restart at 4:00.
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