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1. WO1996005596 - METHOD AND APPARATUS FOR AUGMENTED MISSING PULSE CERTIFICATION OF A MAGNETIC RECORDING MEDIUM

Publication Number WO/1996/005596
Publication Date 22.02.1996
International Application No. PCT/US1995/010382
International Filing Date 15.08.1995
IPC
G01R 33/12 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
12Measuring magnetic properties of articles or specimens of solids or fluids
G11B 5/09 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
02Recording, reproducing or erasing methods; Read, write or erase circuits therefor
09Digital recording
G11B 20/18 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
18Error detection or correction; Testing
G11B 27/36 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
36Monitoring, i.e. supervising the progress of recording or reproducing
CPC
G01R 33/1207
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
12Measuring magnetic properties of articles or specimens of solids or fluids
1207Testing individual magnetic storage devices, e.g. records carriers or digital storage elements
G11B 20/182
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
18Error detection or correction; Testing ; , e.g. of drop-outs
1816Testing
182using test patterns
G11B 27/36
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
36Monitoring, i.e. supervising the progress of recording or reproducing
G11B 5/09
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
02Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
09Digital recording
Applicants
  • TRACE MOUNTAIN PRODUCTS, INC. [US/US]; 1040 East Brokaw Road San Jose, CA 95131, US
Inventors
  • PRESSMAN, Gerald, L.; US
  • SHEVICK, Barry, L.; US
  • PEREZ, Fredric, A.; US
  • O'DOCHARTY, Gerald, W.; US
Agents
  • WELLER, Edward, B. ; Fenwick & West Suite 600 Two Palo Alto Square Palo Alto, CA 94306, US
Priority Data
08/290,39315.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR AUGMENTED MISSING PULSE CERTIFICATION OF A MAGNETIC RECORDING MEDIUM
(FR) APPAREIL ET METHODE D'AMELIORATION DE L'HOMOLOGATION D'UN SUPPORT D'ENREGISTREMENT MAGNETIQUE PAR LE TEST DES IMPULSIONS MANQUANTES
Abstract
(EN)
An apparatus and method measure the recording quality of a magnetic recording medium (21). A magnetic medium recorder (14) records signals on the recording medium (21) and detects signals recorded on the medium (21). A pattern generator (13) coupled to the magnetic medium recorder (14) produces a test signal (202) that includes at least one pulse that has an amplitude that is a minimum read amplitude relative to the amplitude of a reference condition. The sequence of pulses preferably represents the data pattern (302) that will be recorded on the medium (21) under normal operating conditions and that has such a minimun amplitude. A pulse amplitude detector (20) has a first input coupled to the magnetic medium recorder (14). The pulse amplitude detector (20) supplies a pulse detect signal (27) having a first state indicative of a detected pulse, in response to the pulse amplitude of the detected signal applied to the first input of the pulse generator (13) being greater than a threshold, and supplies the pulse detect signal (27) having a second state indicative of a missing pulse, in response to the pulse amplitude of the detected signal applied to the first input of the pulse generator (13) not being greater than a threshold.
(FR)
Appareil et méthode de mesure de la qualité d'enregistrement d'un support d'enregistrement magnétique (21). Un enregistreur à support magnétique (14) enregistre des signaux sur le support d'enregistrement (21) puis détecte les signaux enregistrés sur ce support. Un générateur de mire (13) couplé à l'enregistreur sur support magnétique (14) produit un signal de test (202) comprenant au moins une impulsion présentant une amplitude correspondant à l'amplitude minimale de lecture par rapport à l'amplitude d'un état de référence. La séquence des impulsions représente de préférence le schéma de données (302) devant être enregistré sur le support (21) en conditions de fonctionnement normal et présentant une telle amplitude minimale. Un capteur (20) d'amplitude des impulsions comporte une première entrée branchée à l'enregistreur sur support magnétique (14). Le capteur (20) d'amplitude des impulsions envoie un signal de détection (27) d'impulsion comportant un premier état indicatif d'une impulsion détectée, lorsque l'amplitude d'impulsion du signal à détecter appliquée à la première entrée du générateur d'impulsion (13) est supérieure à un certain seuil et donne le signal de détection (27) d'impulsion présentant un deuxième état indicatif d'une impulsion manquante lorsque l'amplitude d'impulsion du signal détecté appliqué à la première entrée du générateur (13) d'impulsion n'est pas supérieure à un certain seuil.
Also published as
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