Theoretical study of the characteristics of modulation noise in magnetic tapes.
Theoretical study of the characteristics of modulation noise in magnetic tapes.
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磁带调制噪声特性的理论研究。
DOI：
10.3379/jmsjmag.13.133
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
M. Mikoda
中科院分区：
文献类型：
--
作者：
A. Kuroe;M. Mizoh;M. Mikoda
采用简化的正弦磁头-磁带接触模型，从理论上研究了表面粗糙度对调制噪声的影响。制备了具有正弦表面粗糙度的Co-γ Fe_2 O_3带材，用VHS录像机测量了其调制噪声。结果表明，调制噪声中包含幅度调制（AM）和相位调制（PM）两种成分，AM和PM噪声随磁带表面粗糙度与记录波长之比的增大而增大，PM噪声随磁带表面空间波长与记录波长之比的减小而增大。
The influence of surface roughness on modulation noise was studied theoretically using a simplified sinusoidal head-tape contact model. Co-γFe2O3 tapes having sinusoidal surface roughness were prepared, and their modulation noise was measured by VHS VTR. It was found that the modulation noise contained both amplitude modulation (AM) and phase modulation (PM) components; AM and PM noise increased with the increase in ratio of surface roughness to recording wavelength, and PM noise increased with the decrease in ratio of spatial wavelength of tape surface to recording wavelength.