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Extra info for Magnetic Recording
Example text
7. Describe the two methods for erasing magnetic tape, the characteristics of automatic and manual tape degaussers, and the procedures for degaussing magnetic tape. 8. Describe the proper procedures for handling, storing, and packaging magnetic tape, tape reels, and tape cartridges. PHYSICAL PROPERTIES OF MAGNETIC TAPE The three basic materials used to make magnetic tape are (1) the base material, (2) the coating of magnetic oxide particles, and (3) the glue to bind the oxide particles onto the base material.
2-3 • A magnetic tape that is improperly wound on a reel. LEVEL ERRORS Magnetic tape is manufactured to have a specified output signal level (plus or minus some degree of error). Level errors happen when the actual output signal level either drops or rises to a level outside the expected range. For example, if a magnetic tape is rated for 10 volts ( +/−10%), any output signal level below 9 volts or above 11 volts is a level error. Level errors are caused by an uneven oxide coating on the magnetic tape.
The actual output signal level of the tape exceeds the manufacturer’s specified range for the output signal level (+ / − 10%). It’s caused by an uneven oxide coating on the tape due to worn tape or defective manufacture. A-12. Tape’s performance degrades to a point where it’s no longer usable. A-13. Normal wear, accidental damage, environmental damage, and winding errors. A-14. Repeated contact with a recorder’s fixed surfaces such as magnetic heads, tape rollers, and tape guides. A-15. a. Improperly adjusted tape transport mechanism.