Do not fast forward or rewind the tape. Without rewinding, play back the tape, that is, the take-up reel with the test tape becomes the supply reel. Report the print-through level as the difference of the copy signal level and the recorded signal level, all in decibel. For additional information about print-through, see the Questions and Answers section. Equalization must be specified for such tests.
Sensitivity is for a specific frequency and each curve varies with bias.
This is a function of desired operating level, tape type, and headroom desired. Set playback equalization. Usually this means setting the 10kHz playback tone to the same level as the 1 kHz or 500 Hz reference level tone on the alignment tape. Set recording bias amplitude using over bias method. It affects tape in both directions.