Disclosure to Promote the Right To Information

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Judith Sims
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इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to

the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public,

to promote the timely dissemination of this information in an accurate manner to the public.

the Old to the New IS 4480-2 (1987): Magnetic Tapes for Sound Recording and Reproduction, Part 2: Professional Grade (Reel-to-reel) [LITD 7: Audio, Video

1 इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS (1987): Magnetic Tapes for Sound Recording and Reproduction, Part 2: Professional Grade (Reel-to-reel) [LITD 7: Audio, Video and Multimedia Systems and Equipment]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

5 Indian Standard IS : 4480 ( Part 2 ) SPECIFICATION FOR MAGNETIC TAPES FOR SOUND RECORDING AND REPRODUCTION PART 2 PROFESSIONAL GRADE ( REEL-TO-REEL) ( First Revision ) Recording Sectional Committee, LTDC 23 Chairman SHKI N. J. NAIR Rpxcnting Directorate General of All India Radio, New Delhi Members SHRI S. C. DUBLISH (Alternate to Shri N. J. Nair ) SBRI V. P. GANATRA Vimal Enterprises Ltd, Umbergam SHRI Y. P. GANATRA ( Al~ernatc) SHRI K. L. GARB Directorate Gt=neral of Supplies & Disposals, New Delhi SHRI R. V. NAKAYANAN ( Alternate) SHPII A. Das Gcip.1.1 Price Electronics & Electricais Ltd, Bombay; c>nd The Radio Electronic & Television Marrufacturerr Association ( RETMA), Ilomb;ly SHRI T. S. BcJ,, ( il!tcmnlc ) Sn~r D. K. GUP-CA SARI J. K. MAITRA (rllfcmatc) Gramophone Co of India Ltd, Calcutta SRRI R. G. GUPTA Department of Electronics, New Delhi SRRI P. N. GUPTA ( Alternate ) JOINT DIRECTOR %DS/S & T/TELE Railway Board, New Delhi JOINT DIRECTOR STDS/S & T/ LAB ( Alternate ) MANAGER ( MBINTBNA~CE) Film & TV Institute of India, Pune DR V. MOHANAN National Physical Laboratory, New Delhi SHRI B. C. MUKHIRJEE National Test House, Calcutta SHRI J. K. BIUTTACRARYA (Alternote) Q Copyright 1988 BUREAU OF INDIAN STANDARDS ( Confinurd on page 2 ) This publication is protected under the Indian Copyrighf Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the Dublisher shall be deemed to be an infringement of copyright under the said Act.

6 IS : 4480 ( Part 2 ) Members LAY-&L S. P. Muaoa~ SHRI SEHI SUNIL K. BERA ( Altcrnafe) PATEL SHRI K. D. PAVATI~ Representing Ministry of Defmce ( DGI ) Electronic Component Industries Association ( ELCINA ), New Delhi Central Electronics Engineering Research Institute ( CSIR ), Pilani SHRl M. R. ~APOOR ( ~bxrrte ) SEIIU N. KAMAOEANO~AN Bharat Electronics Ltd, Bangalore SIXI~I$~AYY RAAI A. INDRA ( Alternntc ) SERI N. SRANKAR National Airports Authority, New Delhi SHRI M. P. SAMA ( Alternate ) SBRI VIRBNDRA VIJAY Directorate General, Doordarnhan, New Delhi Smrr P. K. CHOUDHURY ( Alternate ) SHRI HARCRARAN SINQH, Director General, BIS ( Ex-@cio Member) Head ( Electronics ) Secretary SERI PAVAN KUMAX Deputy Director ( Electronics ), BIS Sy-.tctr1s, 1>? 11c: 2.3 : 1 1 Members Directorate Cyneral of ~11 India Rxdio, Nrw Delhi SHRI S. C. Drrnr,rs~ ( &tenute to Shri N. J,. Nair ) SERI V. P. GANAIXA Vimal Enterprises Ltd, Umbergam SHRI D. K. Glros~ Gramophone Co of India Ltd, Calcutta SHRI Aan~ BAQRI ( Alternate ) SERI M. G. BIJLANI Letape India Pvt Ltd, New Delhi SHRI B. C. MUE~E~JEE National Test House, Calcutta SHRI J. K. BEATTACHARYA ( Ahmate ) SHRI J. K. Rrs~r Rishi Electronics Ltd, New Delhi SBRI M. SANEARALINQAM Directorate General of Supplies & Disposals, New Delhi S~sr J, S. PASSI ( Altnnatc ) SHRI D. C. SHA~ANI Weston Electronics Ltd, New Delhi SHRI H. C. PATANFAK Maharashtra Electronics Ltd, Bombay REPXE~E~T.ATI~E National Physical Laboratory, New Delhi

7 MAGNETIC Indian Standard IS : 4480 ( Part 2 ) SPECIFICATION FOR TAPES FOR SOUND RECORDING AND REPRODUCTION PART 2 PROFESSIONAL GRADE ( REEL-TO-REEL ) ( First Revision ) 0. FOREWORD 0.1 This Indian Standard ( Part 2 ) ( First revision ) was adopted by the Bureau of Indian Standards on 22 May 1987, after the draft finalized by the Recording Sectional Committee had been approved by the Electronics and Telecommunication Division Council. 0.2 This standard covers the performance requirements for professional,grade ( reel-to-reel ) magnetic tapes for sound recording ant1 reproduction. 0.3 This standard was originally published in This revision includes the latest requirements of magnetic tapes in view 01 IIIC indigenous technological developments. 0.4 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded of1 in accordance with IS : *. The number of si,gnificant places retained in the rounded off value should be the snmc as that of the specified valttc in this standard. 1. SCOPE: 1.1 This standard ( Part 2 ) covers the general, physical, mechanical and electrical performance requirements for non-perforated professional grade ( reel-to-reel ) magnetic tapes for professional sound recording and reproduction. *R111es lbbr rounding off numerical values ( mid ). 3

8 IS : 4480 ( Part 2 ) TERMINOLOGY 2.1 For the purpose of this standard, the terms and definitions given in TS : 1885 (Part 48jSec 1 )-1978* shall apply. 3. METHODS OF MEASUREMENTS 3.1 The performance requirements specified in this standard shall bc measured by the test methods specified in IS : GENERAL REQUIREMENTS 4.0 The provisions of IS : ; shall apply with the following modifications. 4.1 Design-The tape along with the spool shall be capable of operation and storage at an ambient temperature ranging from-25 C to +55 C and relative humidity up to 95 percent. 4.2 Flammability -The tape shall be such that it passes as >lo\\ burning when tested in accordance with 7 of IS : Base -- The tape material to serve as a base of magnetic medium should generally consist of suitable pliable material, such as polyester. 4.4 The tnpcs shall be caicndrrcd and polished IO give a Ilighly smooth, durable and scratch resistant surface. 4.5 The tape shall be provided with a 2 pm back coating providing a high conductivity matt-surface for elimination of electrostatic pick-up and provide better mechanical handling during play/rewinding. 5. PHYSICAL AND MECHANICAL REQUIREMENTS 5.1 The physical and mechanical requirements of the magnetic tape shall be as specified in Table ELECTRICAL REQUIREMENTS 6.1 The electrical requirements of the magnetic tape shall be ;ts specified in Table 2. ~Electrotechnicai vocabulary : IS : ( Part 3/st!c 3 ) Part 48 Recording, Set 1 Tape recording [.Cu~~rrs&ing tklethuds of measurements on magnetic tapes for sound recording and reproduction ( jirst r&&w ). $Geneal requirements for magnetic sound tape recording and reproducing systems (first reuuion). $Flammability requirements for motion-picture safety films (jirff revision )_ 4

9 IS : 4480 ( Part 2 ) TABLE 1 PHYSICAL AND MECHANICAL REQUIREMENTS OF MAGNETIC TAPE sr, Cl~ARACTRRIST,r REP TO METHODS No. ov MEASUREBENT OR IS : !%1* (1) 12) 13) i) Dimensions : a) Width *;,o, b) Total thicknrss mm, Max mm, Min c) Coating thickness 4.3 O.Ol!I mm, n&/x mm, Min ii) Length of the tape in each spool, Min 366 meter iii) Tensile sfrength : a) Steady tensile strength N b) Shock tensile strength There shall be no breakagcs iv) Elastic elongation 4.0 a) Just prior to the removal of the load b) At the end of 180 minutes after the removal of the load v ) Cupping ( humidity stability ) percent 0.3 percent No cupping in excess of 30 vi) Layrr-to-layer adhesion 4.7 No sticking adhesion or layer-to-layer vii) Anchorage 4.6 The magnetic coating of tape shall show no evidence of anchorage failure. *Methods of measurement on magnetic tapes for sound recording and reproduction (ji7st revision ).

10 IS : 4480 ( Part 2 ) TABLE 2 ELECTRICAL REQUIREMENTS OF MAGNETIG TAPE ( Clnuse 6.1 ) SL CRARACTEBISTI~ REF TO METHOD REQUIRE~~IENTS No. OB MEASUREIYIENT OFIS :447%1!#1' i) Maximum output level at 3O:, distortion at 1 KHz 5.1 -t :, dl: ii) Total harmonic distortion 5.3 Not to exceed 0.5 percrnt iii) Erasibility 5.4 The wasing lit,ld required to erase the tape to 60 JI1 below recordrd lewl should not excerd!;$r,at,mt iv) Print through v) Frequency responw vi) Signal to-dc noise ratio vii) Tape sensifivity :) 5.5 The print through resulting from layr+to-layer siqrul transfer shall be brttc>r ~h.kn 57 dl{ The frequency response of the tape shall be flat within & 1 0 dfi bctwecn 50 Hz to 14 KHz The ratio shall be better than 50 dl< The instantaneous vari;ztion in stnsirivity m?asurrd as variation in reproduc<d lcvrl of a tone recorded on tape at a reference recording level shall not pxceed the following values. Within the length of reel : at 1 khz f 0 5 dh at 10 khz i 1 0 dl% From reel to reel at 1 ki-iz + I 0 dl, at 19 khz *Methods of nleasurement on magnetic tapes for sound recording and reprouction (first reuision ). tl AT/m = 4n x 10ea oerstead 6

11 IS : 4480 ( Part 2) MARKING 7.1 Each tape reel or its carton shall be marked with the following: Name or trake-mark of the manufacturer, Grade of tape ( may be in code), Tape length and spool size, and Date of manufacture ( may be in code ). 7.2 The magnetic tapes may also be marked with the Standard Mark. NOTE -The use of the Standard Mark is governed by the provisions of the 13ureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously chrxked by BIS ior conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from thebureau of Indian Standards.

12 INTERNATIONAL SYSTEM OF UNITS ( SI UNITS ) Base Units QUANTITY Length Mass Time Electric current Thermodynamic temperature Luminous intensity Amount of substance UNIT metre kilogram second ampere kelvin candela mole SYbmOL m kg s A K cd mol Supplementary QUANTITY Plane angle Solid angle Units UNIT radian steradian SYMDOL rsd ST Derived Units Force Energy Power Flux QUANTITY Flux density Frequency Electric conductance Electromotive force Pressure, stress UNIT newton joule watt weber tesla hertz siemens volt Pascal SYMBOL J" W Wb T HZ S V Pa D&E INI I IUN 1 N = 1 kg.m/s 1J = 1 N.m 1W =IJ/s 1 Wb= 1 V.s 1 r = 1 Wb,ms 1 Hz = 1 c/s (s-l) 1 S = 1 A/V 1V = 1 W/A 1 Pa E 1 N;m*

Disclosure to Promote the Right To Information

इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information