NDLI: Time interval analysis errors in measuring recording media transition jitter

Content Provider	IEEE Xplore Digital Library
Author	Hughes, G.F. Xiaodong Che Beach, R.S.
Copyright Year	1965
Abstract	Media transition position jitter noise can be a dominant signal-to-noise ratio (SNR) issue in magnetic recording systems with magnetoresistive (MR) heads and (0,k) PRML channels, since the high MR head "gain" emphasizes media jitter noise over electronic noise, and (0,k) codes are sensitive to dibit jitter. Time interval analyzer (TIA) instruments are useful for measuring transition jitter (write jitter), since they can separate write jitter from electronic noise (read jitter) with minimal synchronization and speed variation difficulties. This paper analyzes TIA errors due to read channel intersymbol interference (ISI), which occurs even though TIA measurements are made with periodic LF or HF bit patterns at equal bit intervals "T", which should be unchanged by ISI. Theory and data show that TIA measurements underestimate jitter by as much as 40% at low channel bit density D/sub c//spl equiv/P/sub 50//T/spl ap/1.5-1.8, and overstate jitter at high density. Even though typical TIA jitter measurements are made between nonadjacent pattern pulses, these errors still occur due to ISI by unmeasured neighbor pulses. It is shown that similar errors occur with TIA electronic read jitter noise measurements. At channel densities above D/sub c//spl ap/2.6, channel amplification of transition jitter occurs, which may be a factor in PRML channel bit density limits.
Sponsorship	IEEE Magnetics Society
Starting Page	4475
Ending Page	4481
Page Count	7
File Size	239426
File Format	PDF
ISSN	00189464
Volume Number	33
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Error analysis Time measurement Jitter Signal to noise ratio Intersymbol interference Magnetic noise Pulse measurements Magnetic analysis Magnetic recording Magnetic heads
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Bit errors due to channel modulation of media jitter

Effect of head field gradient on transition jitter in perpendicular magnetic recording

Design of magnetic recording heads for high track densities

Writing Process Induced Media Noise Measurement

Jitter Analysis and Cross-Track Correlation Length Extraction Through Nonlinear Noise Scaling With Reader Width

Media limitations on achievement of maximum detection window

Minimum noise pulse slimmer

Modulation noise measurements of high density recording channels using MR heads

Spatial noise phenomena of longitudinal magnetic recording media

Time interval analysis errors in measuring recording media transition jitter

Similar Documents

Bit errors due to channel modulation of media jitter

Effect of head field gradient on transition jitter in perpendicular magnetic recording

Design of magnetic recording heads for high track densities

Writing Process Induced Media Noise Measurement

Jitter Analysis and Cross-Track Correlation Length Extraction Through Nonlinear Noise Scaling With Reader Width

Media limitations on achievement of maximum detection window

Minimum noise pulse slimmer

Modulation noise measurements of high density recording channels using MR heads

Spatial noise phenomena of longitudinal magnetic recording media

Time interval analysis errors in measuring recording media transition jitter