The DSP4000B was a Broadcast Production flavored version of the DSP4000 which has been superceded by the DSP4000B+. Much of the information on the 4000B+ also applies to the 4000B.
The DSP4000B is now a discontinued product which does not support Web downloads. It replaces many of the normal DSP4000 presets with the Broadcast/Production set.
The DSP4000 Series User Presets File contains a description of the Broadcast presets, but is unfortunately only available to registered DSP4000 series users.