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Inductive Tape Synthesizer for R W Head Testing

IP.com Disclosure Number: IPCOM000090084D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Frese, SJ: AUTHOR

Abstract

Read-write head assemblies for magnetic tape devices or the like are tested for operating performance by inductive coupling of control pulses from or into a standard magnetic head. Variables associated with head testing by reading master tapes are eliminated.

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Inductive Tape Synthesizer for R W Head Testing

Read-write head assemblies for magnetic tape devices or the like are tested for operating performance by inductive coupling of control pulses from or into a standard magnetic head. Variables associated with head testing by reading master tapes are eliminated.

A pulse is produced by oscillator 10 and shaped by pulse shaper 11 before it is introduced to driver amplifier 12. The pulse then energizes write head 15 which acts as a transmitter to inductively couple with read head 16. The output from 16 is amplified and then recorded. Head 15 can be either a master head of known inductive characteristics, or can be the head to be tested via a master read section. If head 15 is to be tested, standard head 16 is used for the inductive pickup and waveform analysis. Shaper 11 provides a precise waveform for energizing heads 15 and 16 which, when sensed, produce responses similar to the type of waveforms encountered in operating with tape.

The actual signal detected by head 16 can either be recorded for later analysis or can be automatically analyzed. The entire system is capable of complete automation, even to the placing of the heads in position to be tested. Head 15 can be moved to allow the system to scan the responses of 16 for movement in X-Y coordinates, or vice versa. For example, the X coordinate can be parallel to the track placement, while the Y coordinate can be parallel to the read head reference line parallel to t...