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.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 5802-2 (1975): Flexible Coaxial Radio Frequency Cableswith Characteristic Impedance 75 , Part 2: Cable Type75-7-2 [LITD 6: Wires, Cables, Waveguides and Accessories]

IS : 5802 ( Part 11) - 1975

Indian Standard

SPECIFICATION FOR FLEXIBLE COAXIAL RADIO FREQUENCY CABLES

WITH CHARACTERISTIC IMPEDANCE 75 a

PART II CABLE TYPE 75.7-2

( First Reprint MARCH 1990 )

UDC 621.315.2.029.5

@ Cofiyrighr 1976

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC

NEW DELHI 110002

February 1976

xsrs!M2(Partfr)-1975

Indian Standard

SPECIFICATION FOR FLEXIBLE COAXIAL RADIO FREQUENCY CABLES

WITH CHARACTERISTIC IMPEDANCE 75 n

PART II CABLE TYPE 75-7-2

Cables, Wires and Waveguides for Telecommunication Equipment Secjonal Committee, ETDC 42

Chairman Representing

S-1 T. S. SUBRA~+~A~PIAN Directorate General of Posts and Telegraphs, New Delhi

Membsrs

Da VAWL A-ED Directorate General of Technical Development, New Delhi

SEBI BALBAJ BHANOT (Alternate) S-1 S. BALABAM Directorate General of C&l Aviation ( Ministry of

Tourism and Civil Aviation ), New Delhi DE KAILASE CHAND~~A National Physical Laboratory ( CSIR ), New Delhi DIREOTOII Central Electronics Engineering Research Institute

( CSIR ) , Pilani Srm~ R. K. GUPTA Delton Cable Industries Pvt Ltd, Delhi

SHRI OM PAUL ( Altcrnatc ) SHEI K. GURURAJA Bharat Electronics Ltd, Baogalore

SHRI R. SOMASBKH~\RA ( Alternate ) JOINT D I n E o T o R STANDARDS Railway Board ( Ministry of Railways )

(S&T)‘-11 DEFWTY DIRECTOR STANDABDS

Ministry of Defence ( DGI ) MAJ D. S. DEANOTA ( Alternate )

SEBI A. NA~ARAJA RAO Hindustan Aeronautics Ltd, Bangalore SHBI V. RAMA MOHAN RAO ( Aitemate )

SHBI K. V. R. -RAO The Indian Cable Co Ltd, Calcutta SHRI S. K. ROY Hindustan Cables Ltd, Rupnarainpur

SH~I R. SEN ( Alternate) DB E. SCHIJ!4MEL Siemens India Ltd, Bombay

Saab K. SONDEI ( Alfemote ) ( Continued on page 2

@ CopVright 1976

BUREAU OF INDIAN STANDARDS

This publication is protected under the Zsdiun Cofiyright Act (XIV of 1957) and reproduction in whole or in part by any means except with written prrmission of the publisher shall be deemed to be an infringement of copyright under the said Act.

Is:5802(Pala)-19%

( Confinwdjknn post 1)

SHRI R. v. s. SITABAM

SHBI R. SOMASUXDUABX

In personal capacity ( Tala Znslifuta of Ftmdammtal Reswch, Bomb@ )

Directorate of Technical Development & Produc- tion C Air 1 t Minbtrv of Defence j, New Delhi , *-

SBRI S. DIISIXAXAMI ( Altwnute ) SKBI K. SBIDEAB Indian Telephone Indtiries Ltd, Bangalore

SHBI M. D. SANTHANAY ( AUcmub ) SHRI N. SRINIVAMN, Director General, IS1 ( Ex-o$cio Member)

Director ( Alec tech ) ( Secratwy )

2

JS:5802(PartII)-1975

Indian Standard

SPECIFICATION FOR FLEXIBLE COAXIAL RADIO FREQUENCY CABLES

WITH CHARACTERISTIC IMPEDANCE 75 n

PART II CABLE TYPE 75-7-2

0. FOREWORD

0.1 This Indian Standard ( Part II ) was adopted by the Indian Standards Institution on 27 October 1975, after the draft finalized by the Cables, Wires and Waveguides for Telecommunication Equipment Sectional Committee had been approved by the Electrotechnical Division Council.

0.2 This standard deals with flexible coaxial RF cable with solid polyethy- lene dielectric and having a characteristic impedance of 75 Q.

0.3 Assistance has *been derived from BS 23 16 : Part 3 : 1969 ‘Specification .for radio-frequency cables : Part 3 Cable data sheets ’ issued by the British Standards Institution.

0.3.1 The nearest IEC equivalent of this cable is 96 IEC 75-7-4 listed in IEC Publication 96-2 ( 1961 ) ‘ Radio-frequency cables : Part 2 Relevant cable specifications ’ issued by International Electrotechnical Commission.

0.4 The diameters for the plain high conductivity annealed copper wire for inner and outer conductors have been chosen from IS : 2982-1965* as the wires’require to be processed further.

0.5 This standard shall be used in conjunction with IS : 5026-1969t.

0.6 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, shall be rounded off in accordance with IS : 2-1960$. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

1. SCOPE 1.1 This standard ( Part II ) specifies the dimensions, constructional details and the requirements for the RF flexible coaxial cables having type designation 75-7-2.

.- *Specification for copper conductors in insulated cables and cords. General requirements and tests for radio frequency cables. $Rules fOF rounding off numerical values ( rcvis6d).

3

IS : 5802 ( Part II ) - 1975

2. TYPE DESIGNATION

2.1 The cables covered by this standard are designated as 75-Y-2 in accor- dance with the type designation given in 5.1 of’ IS : 5026-1969*.

3. CONSTRUCTION AND DIMENSIONS

3.1 The cable shall consist of a single solid, inner conductor of plain annea- led and high conductivity electrolytic copper, the .dielectric consisting of solid polyethylene extruded over the conductor. Over the dielectric, a single braid of plain annealed copper wire shall be applied and the cable shall be finished overall with ordinary sheath of suitably compounded PVC, black in colour ( see Fig. 1 ).

OUTER PROTECTIVE SHEATH

OUTER CONDUCTOR

Nominal A = 7.25 mm

Fro. 1 CABLE CONSTRUCTION

3.2 Dimensions - The dimensional requirements shall be in accordance with Table 1.

TABLE 1 dIMENSIONS

All dimensions in mil!;m’etres.

r%. ITEN

(1) (2) i) Inner conductor

ii) Dielectric iii) Core

iv) Outer conductor ( SCI Note 1)

v) Outer protective sheath

vi) Overall diameter

DEBOBIPTION MI~IIUUSI NOM~AL MAXIMUM

(3) Single diameter Thickness Diameter over

dielectric Braid wire &a-

(4) I.104 2.44 7.11

-

(5) (6) I.120 I.136

7F5 7%

0.20 - meter

Thickness 0.85 1.05 -

10.0 10.3 10.6

NOTE 1 - The braid wire diameter shall be checked before braiding. NOTE 2 - The fillin NOTE 3 *d

factor shall be not less than O-70. - The’bral angle halt be < 45“.

*General requirements and tests for radio frequency cabler.

4

ISr5802(PartII)-1975

4. MARKING

4.1 The provisions of 4 of IS : 5026-1969* shall apply.

‘5. TESTS

5.1 Conditions of Tests - The conditions of tests shall be in accordance with 5.1 of IS : 5026-1969*.

5.2 Classification of Tests

5.2.1 Type Tests- The following tests shall be the type tests:

a) Dimensions,

b) Resistivity of inner conductor,

c) Dielectric strength of core,

d) Insulation resistance,

e) Spark test,

f ) Discharge test,

g) Characteristic impedance ( see Note ), Nom - The characteristic impedance value is computed from capacitance and

velocity ratio mea3urements.

h) Attenuation constant,

j) High temperature test,

k) Low temperature test,

m) Flow test, and

n) Dimensi?nal suitability.

5.2.2 Acceptance Tests - The following tests shall be the acceptance tests:

a) Dielectric strength of core,

b) Insulation resistance,

c) Characteristic impedance [ see Note under 5.2.1 ( g )I,

d) Attenuation constant,

e) Dimensions,

f) High temperature test,

g) Discharge test, and

h) aesistivity of inner conductor.

5.2.3 Routine Tests - The following tests shall be the routine tests:

a) Dielectric strength of core,

b) Insulation resistance,

‘Gentral requirements and teats for radio frequency cables,

5

zs.r48&z(PSrtII)-1975

c) Spark test,

d) Characteristic impedance [ see Note under 5.2.1 (. g ) 3,

e) Attenuation constant, and

f) Resistivity of inner conductor. a

5.3 Electrical Teete 6 The electrical tests and the requirements shall be as given in Table 2.

St4 NO.

(1) i)

ii) iii)

iv)

v)

vi) vii)

TABLE 2 ELECTRICAL TESTS AND REQUSRRMRNTO

T~8-f CLA~J~E&WEUF,NCII RmcjuIB~la9~T IN 1s : 5026-1969+

PI R$zoty of inner con-

Dielectric strength of core Insulation resistance

Spark test

Discharge teat ( Corona test )

Characteristic impedance Attenuation constant

( see Note )

(3) 6.2.1

6.2.2

6.2.3

6.2.4

6.2.5

6.2.9 6.2.11

(4) Aa stated in IS : 29824965t

8 kV (rms) Not less than 23 000 Mn/km

Test voltage 5 kV ( rms) Not leas than 4-O kV ( rmr )

75i38 0.1 dIl/m maximum. The

measuring. frequency shall be 200 MHz.

Nm~-The expected nominal frequency-attenuation curve is given in Fig. 2. The manufacturer shall provide such a curve for his cables. *General requirements and testa for radio frequency cablea, tspecification for copper conductors in insulated cabled and cordr.

5.4 Clima$ic and Mechanical Robustness Tests -The tests and requirements shall be as given in Table 3.

TARLE 3 CLIMATIC AND MECHANICAL TESTS AND REQUIREMRNTS

I%. TEST

(1) (2) i) High temperature teat

ii) Low temperature test

iii) Flow test

CLATJBEREFEBINCE REqmBElKEnm II IS : 5026-1969+

(3) (4)

6.4.3.2 Maximum permitted increase in attenuation shall be @75 dB/m

6.4.3.3 The specimen shall be rub- jetted to 20 hours at a temperature of -40%

6.5 The weight to be applied at each end of the sample shall beSON (8kgf)

*General requirement8 and tests for radio frequency cables.

IO

FREQUENCY MHz

FIG. 2 TYPICAL FREQUENCY-ATTENUATION

RATING CURVES

ANDFREQUENCY-POWER

6. SERVICE ENGINEERING DATA

1.

2. 3. 4.

5.

6. 7.

8.

9. 10. 11.

t%iARACTERISTW VALUE

Rated capacitance

Rated velocity ratio

Rated characteristic impedance

Maximum alternating voltage for continuous use

Maximum voltage for uni-directional pulse operation

Approximate weight

Minimum bending radius for:

a) indoor installations b) outdoor installatiotis

Minimum coiling diameter for drums and reels

Minimum flexing temperature

Maximum power rating in air

Nominal attenuation

67 pF/m

0.66

75 n

5’0 kV ( peak )

1OkV (peak)

150 g/m

5 cm 10 cm

20 cm

- 30°C

see Fig. 2

see Fig. 2

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