This standard specifies the location, size, electromagnetic properties, recording characteristics, character encoding and character set of the magnetic stripe of passbooks used in exchange. This standard describes the characteristics of the passbook cover, namely hardness, minimum size, surface flatness, roughness and the interaction between the cover material and the magnetic stripe. This standard does not include requirements for the content of the record or the use of some control characters. GB/T 15935-1995 Magnetic stripe of passbook GB/T15935-1995 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Magnetic stripes on savingsbooks
Magnetic stripes on savingsbooks This standard is equivalent to the international standard ISO8484-1987 "Magnetic stripes on savingsbooks". 0 Reference
GB/T 15935-1995
ISO 8484-1987
This standard specifies the characteristics and location of magnetic stripes on savingsbooks used in exchange. According to the requirements of this standard, compatibility with international exchange systems is achieved, so that savingsbooks with magnetic stripes can be read and encoded with identification card compatible equipment used in international exchange. National exchange systems may adopt different regulations. 1 Subject matter and scope of application
This standard specifies the location, size, electromagnetic properties, recording characteristics, character encoding and character set of magnetic stripes on savingsbooks used in exchange. This standard describes the characteristics of the cover of the savingsbook, namely hardness, minimum size, surface flatness, roughness and the interaction between the cover material and the magnetic stripe.
This standard does not include requirements for the content of records or the use of some control characters. 2 Reference standards
GB/T15120.2 Identification card recording technology Part 2: Magnetic stripe (idtISO7811-2:1985) GB/T15120.5 Identification card recording technology Part 5: Read and write track Position of track 3 (idtISO7811-5:1985) TAPPIT489os-76 Hardness of paperboard 1)
Note: 1) This standard can be obtained from the Technical Association of the Pulp and Paper Industry, Technical Secretariat. 3 Terminology
The following terms apply to this standard.
3.1 Magnetic stripe
A strip of magnetic material on which signals can be stored electromagnetically. 3.2 Reference medium
A passbook-sized card with a magnetic stripe 1, which is composed of a secondary standard magnetic tape (computer amplitude reference SRM3200, see GB/T15120.2).
Note: 1) - A reference medium is sourced from: Fleischhauer Datentrager GmbH & Co.KG, Hansastr.41, D-4630 Bochum 6, Germany. 3.3 Typical field
The minimum recording field that produces a signal with an amplitude equal to 95% of the maximum signal amplitude under given test conditions. 3.4 Reference field
The typical field of the reference medium.
3.5 Test recording current Test recording current At a recording density of 16.5ftpmm, a recording current between 200% and 220% of the current required for the reference field is produced. 3.6 Average signal amplitudeaverage signal amplitudeApproved by the State Administration of Technical Supervision on December 21, 1995, and implemented on August 1, 1996
GB/T 15935-1995
The average of the peak-to-peak amplitudes of the read signal with a density of 16.5ftpmm in the entire recording area. 3.7 Reference signal amplitudereference signal amplitudeThe average signal amplitude of the reference medium when recorded with the test recording current. 3.8 Individual signal amplitudeindividual signal amplitudeThe non-average peak-to-peak amplitude of the read signal when the density is 16.5ftpmm. 3.9 Location of a flux transitionThe location of the maximum flux change on the surface of the magnetic stripe. 3.10 Recording arearecording area
The area on the magnetic stripe where data can be recorded.
3.11 Drop-in
A read signal that exceeds 10% of half the base signal amplitude when measuring the reference level to the peak. 4 Position of magnetic stripebZxz.net
The magnetic stripe shall be positioned on the outer surface of the back cover of the passbook. The two positions specified relate to a corner and an adjacent edge (see Figure 1). Direction of printed line
Vertical fold
4.1 Parallel to printed line
Figure 1 General position of magnetic stripe on passbook
Direction of printed line
Horizontal fold
If the reader-encoder is integrated with the passbook printer, the magnetic stripe shall be parallel to the printed line (see Figure 1). 4.2 Parallel to folded edge
Where the reader-encoder is used alone, it is generally preferred that the magnetic stripe be parallel to the folded edge, regardless of the type of passbook used. 5 Area of ​​magnetic material
The minimum area covered by magnetic material, as shown in Figure 2. Note: This area is equivalent to Track 3 of the identification card if it is based on the use of read-write tracks. 60
6 Test requirements
Left reference edge
GB/T15935-1995
Back cover of passbook
Minimum area of ​​magnetic material
Figure 2 Minimum area of ​​magnetic material
Folding edge of passbook
Lower reference edge
Before testing, the passbook should be stored in an environment with a temperature of 23±2℃ and a relative humidity of 50±10% for at least 24 hours. The test should be carried out in the same environment, and all signal amplitude tests should be completed under the condition that the measured value is proportional to the induced voltage on the read head.
All passbooks should meet the following requirements before issuance: 6.1 Performance of magnetic stripe passbook cover
6.1.1 Hardness
Hardness is measured by bending moment. When tested according to TAPPIT489Os-76 standard, the bending moment along the magnetic stripe direction shall not be less than 16x10-4N·m.
6.1.2 Flatness of the magnetic stripe area on the passbook cover In the area shown in Figure 3, the surface shall not be deformed, uneven in thickness or uneven, which will affect the magnetic stripe, the design function of the magnetic stripe or the mechanical contact between the magnetic stripe and the magnetic head. 61
6.1.3 Roughness of the magnetic stripe surface
Left reference edge
GB/T15935—1995
Back cover of passbook
Figure 3 Flatness area
Lower reference edge
The average roughness Ra of the magnetic stripe surface shall be measured in both the longitudinal and transverse directions. The measurement shall use a probe with a nominal radius of 2.5um to produce a cut-off wavelength of 0.8mm. The average roughness shall not be greater than 1.4μm. 6.1.4 Cover Material
After the magnetic stripe is placed on the passbook cover, there should be no interaction between the cover and the magnetic stripe that would cause the magnetic stripe to malfunction during normal use. The magnetic stripe should not separate from the passbook cover under normal use. 6.2 Electromagnetic Performance
The reference media is used to compare the performance of different magnetic stripe passbooks and to adjust the equipment used. The single signal amplitude of the reference media shall be between 90% and 110% of the reference signal amplitude. All measurements shall be made within the recording area during the first read operation after recording with the test recording current. 6.2.1 Nominal Density of Flux Reversal
The nominal density of flux reversal is 16.5 ftpmrm. 6.2.2 Typical Field
The typical field of the magnetic stripe under test shall be between 80% and 120% of the reference field. 6.2.3 Average Signal Amplitude
The average signal amplitude shall be between 80% and 145% of the reference signal amplitude, as shown in Figure 4. 6.2.4 Individual Signal Amplitudes
All individual signal amplitudes shall be between 60% and 160% of the reference signal amplitude, as shown in Figure 4. 6.2.5 Erasability
Magnetic media shall be erasable to a signal level of 4% or less of its average signal amplitude by a DC write current equal to 200% of the current used to produce the reference domain.
6.2.6 Noise Signal
After erasing the magnetic stripe with a DC current equal to the test recording current, any read signal that exceeds 10% of the reference signal amplitude by half when the reference level is measured at the peak value is a noise signal. The test should be completed across the nominal track width and along the length of the magnetic stripe. During the test, the signal amplitude of the magnetic stripe and the reference signal amplitude should be measured under the same conditions when the first read after writing occurs. During the test, even if only one noise signal appears on the magnetic stripe, the magnetic stripe cannot be accepted. 62
7 Working environment
GB/T 15935-1995
Tolerance range of average amplitude
200220
Tolerance range of single amplitude [Use
Record current percentage -
Ir - Current generating reference domain
Figure 4 Magnetic saturation curve and tolerance zone of base media The magnetic stripe passbook should ensure reliable use under the following conditions: temperature: 5~40℃;
Relative humidity: 20%~～80%;
Maximum wet bulb temperature: 25℃.
8 Recording characteristics
8.1 Track position
The minimum width of the record should be 2.8mm. The area between the two parallel lines 12.5mm and 15.3mm from the lower reference edge should be fully covered by the record.
8.2 Recording area
The direction of recording shall be from the left reference edge to the right reference edge. The recording area shall start at 9.5mm from the left reference edge and end at 85.0mm.
For each new record, the entire recording area shall be re-recorded, and the area not used to record data or control characters shall be filled with "0" bits.
For synchronization purposes, the entire record located in the recording area shall start and end with at least 20 "0\ bits. In addition to the synchronization bits, the recording area can accommodate up to 108 5-bit characters. This includes any repeated records and gaps between records.
Note: The layout of the record, such as the number of symbols, the number of records, the definition of the gaps between records, etc., shall be specified in other application standards. Similarly, the content of the record shall also be specified in other application standards.
GB/T15935-1995
8.3 Orientation of the head| |tt||When the read gap of the head is adjusted to the maximum read signal amplitude, the angle between the lower reference edge of the head and the center line of the read gap should be 90°±0.7°.
8.4 Recording method
The recording technology used should be dual-frequency phase coherent recording (see GB/T15120.2). 8.5 Bit density
Measured in the longitudinal direction parallel to the lower reference edge, the average bit density should be 8.3±5%bits/mm. The distance between adjacent flux reversals is 0.121±0.010mm for \o\ and is 0.060±0.006mm. 9 Character coding and character set
The character coding should be a 5-bit code (4 bits plus the check bit), starting from the lowest bit and ending with the check bit. The bit allocation of characters 0 to 9 and control characters is given in Table 1. Table 1 Character set and coding
Only for hardware control,
Start mark;
Separator;
End mark.
10 Error detection
GB/T15935--1995
Each character should be added with an odd number of parity check bits. Conclusion The bundle marker should be followed by an LRC character (LRC = longitudinal margin check), which adds an even parity check to all identical numeric bits in the record. The LRC character itself should add an odd parity check.
Additional Notes:
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Research Institute of the Ministry of Electronics Industry. This standard was drafted by the 32nd Research Institute of the Ministry of Electronics Industry, the Standardization Research Institute of the Ministry of Electronics Industry, and the Industrial and Commercial Bank of China. The main drafters of this standard are Bai Erhuang, Wang Tianyu, Li Yunqin, Lu Changming, and Zhong Anni. 65
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