Disclosure to Promote the Right To Information

Transcription

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 (1982): Quartz Crystal Units Used for Frequency Control and Selection, Part 3: Series BC for Oscillators, Section 3: Quartz Crystal Unit Type BC-03 [LITD 5: Semiconductor and Other Electronic Components and Devices]! 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

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4 UDC IS : 8271 ( Part IilSec 3) Indian Standard El 1 I SPEClFlCATlON FOR QUARTZ CRYSTAL UNITS USED FOR FREQUENCY CONTROL AND SELECTION PART III SERIES BC FOR OSCILLATORS Section 3 Quartz Crystal Unit Type BC General - This standard shall be read in conjunction with IS : 8271 ( Part 1 )-I981 Specification four quartz crystal units used for frequency control ana selection: Part I General requirements and tests ( first revision ), 1. Outline and Dimensions- Holder outline shall conform to Type BC (see Sheet No. 5 of IS : Specification for crystal holders ). 2. Marking - See 8 of IS : 8271 ( Part I ) Construction and Workmanship - See 7 of IS: 8271 ( Part I) Test Schedule and Detail Requirements 4.1 General Conditions for Test -See9.2 of IS : 8271 ( Part I ) Test Schedule -The sequence and grouping of type, routine and acceptance tests shall be as per 9.1 of IS : 8271( Part I) Detail Requirements - The detailrequirements applicable to this particular type of crystal unit shall be as specified in Table 1. TABLE 1 DETAIL REQUIREMENTS OF QUARTZ CRYSTAL UNIT TYPE W-03 SI No. Chrrraatoristic Requirement (1) (2) (3) 1) Type of holder BC (Seel) I!) Frequency range 5 to 20 MHz 111) Frequency tolerance: a) Over operating temperature: f 25 ppm range iv) Resonance resistance See Table 2 I v) Mode of oocillatton Fundamental vt) Load capacitancs Infinity (Series) vii) Capacitance shunt 7 pf Max viii) Operating temperature range -20X to +70 c ix) Test set, calibration values and See Table 3 rated drive level x) Shock la8 per 9.15 (Severity A) of IS : 8271 ( Part I ) I: a) Frequency change f 5 ppm f 10 percent ( Conrlnoed) Adopted 21 May 1982 I Q September 1982JSl INDIAN STANDARDS INSTITUTION HANAK BHAVAN, 8 BAHADUR SHAH EAFAR MAR6 NEW DELHI I Or 1

5 IS : 8271 ( Part III/Set 3 ) TABLE I DETAIL REQUIREMENTS OF QUARTZ CRYSTAL UNIT TYPE ~BC-03- Cod SI No. Characteristic Requirement 0) (2) (3) xl) xii) xiii) xiv) Vibration [as per 9.1&l ( Severity A ) of IS : 8271 ( Part I )-19811: a) Frequency change Temperature cycling: a) -Frequency change Temperature run: a) Frequency change Ageing Frequency change f5iwm f 10 percent f5ppm f IO percent *frwm f 10 percent 5 ppm TABLE 2 RESONANCE RESISTANCE I Table 1, /fern ( iv ) ] Frequency Range Maxlmum Resonance Resistance MHz Ohms (1) (2) From 5 to 7 50 Over 7 to Over 10 to Over 15 to TABLE 3 TEST SET, CALIBRATION VALUES AND RATED DRIVE LEVEL i Table 1, /tern ( ix ) 1 SI Frequency Range Calibration Values Ra;tteyrive No. P c ) Resistance Crystal Resistor Current vi%e MHz Ohms ma V mw (1) (2) (3) (4) (5) (6) 0 From 5 to ii) Over 7.5 to lit) Over IO to Iv) Over 15 to M 12 - For SI NO. (I) to (iii) - Test Set T%30/TSM. For SI No. (iv) - Test Set TS683/TSM I 5 0 f Printed at Arcee Press, New Delhi ,lndla