Contents Menu

High Density Interference Characteristics in Digital Magnetic Recording

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 32 Issue 1 Page 163-172
published_at 1981
KJ00000156399.pdf
[fulltext] 745 KB
Title
ディジタル形磁気記録の高密度干渉特性
High Density Interference Characteristics in Digital Magnetic Recording
Creators Nishikawa Masaaki
Creators Itoyama Yoshikatu
Creators Kirihara Akio
Source Identifiers
The influences of medium parameters and recording level on the playback signal amplitude of high density digital magnetic recording have been experimentally examined. Several magnetic tapes with a thickness of 2.8 to 14μm were used for the experimental media. The playback signal amplitude from symmetrically recorded transition pattern was measured with varying recording transition density and recording current level. The transition density at which playback signal amplitude decreases to 50% of isolated signal amplitude, D_<50>, was noticed as a measure of overall resolution. The result of experiments can be summarized as follows : (i) The half amplitude density D_<50> is sensitive to recording current level in a thick medium, but this recording level dependency of D_<50> becomes less with decreasing medium thickness. (ii) The dependency of D_<50> on medium thickness δ can be approximately expressed as the form, D_<50>∽ δ^<-α>. The value of α depends on the recording level K. For example, α is about 0.8 and 0.3 for K is 2 and 0.5 respectively. (iii) As it can be expected from the superposing calculation of isolated playback pulses, D_<50> shows inversely proportional relationship to the half pulse width W_<50> of the isolated signal. The actual inversely proportional constant, however, somewhat differes from the calculated value.
Subjects
電気電子工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1981
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部