ABEX Mixed Frequency Response Test Tape TCC-183LM
Signal: 10k+3k+1k+125Hz, -10dB (ref level: 0dB=250nWb/m, shown as -6B on 160nWb/m players), full track, 120us (normal position)
Mixed Frequency, you need a splitter (either software like adobe audition or hardware) to visualize the frequency signals.
Duration: 10min
Purpose: azimuth adjustment, frequency response check, tape speed measurement, wow/flutter measurement
See last picture for signal details.
Do NOT set Dobly NR ON when using any frequency response tapes.
Only use with Dolby NR OFF.