Generally, almost all document or image files can be exported to PDF documents via the use of a virtual PDF printer or with a dedicated export function in the software. AutoCAD is no exception here and should be able to export DBT format to PDF.
Convert AutoCAD R2000 DB template file to Adobe Portable document format.
We found one software available in the database for this conversion.
Microsoft Windows software - convert dbt to pdf on Windows
Leading 2D and 3D CAD development software from Autodesk
Convert from dbt file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.