This is live entropy from the Null Gamma Device. The line represents four sets of the least two significant bits of each photo sensor packed into single bytes. Min. entropy is 7.9 bits/byte.
Note: We endeavour to maintain this entropy source on-line at all times, but that’s not always possible. Sometimes maintenance is required, and it goes off-line when the instrument needs polishing. Most Bank holidays are out too. There will be a big red error box and an “An Error Has Occurred…” message during the off times. Apologies.