KS 1884-1: Specification — Accessories for use in antenna installations — Part 1: Splitters (Draft Standard)

2008·1.2 MB·English

by  Kenya Bureau of Standards (KEBS)

Republic of Kenya
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KS 1884-1 (2008) (English): Specification —
Accessories for use in antenna installations —
Part 1: Splitters (Draft Standard)

KENYA STANDARD KS 1884-1:2008
ICS 33.120.40

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Specification — Accessories for use in
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antenna installations —
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Part 1: Splitters
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PUBLIC REVIEW DRAFT, OCTOBER 2008
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© KEBS 2008 First Edition 2008
KS 1884-1:2008

8TECHNICAL COMMITTEE REPRESENTATION
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The following organizations were represented on the Technical Committee:
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Widestream Communications Limited
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Kenya Broadcasting Corporation
Meteorological Department

RKenya Power & Lighting Company
Telea (K) Limited
SR Kenya Limited
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Department of Defence
Kenya Police Force
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Communications Commission of Kenya
Kenya Bureau of Standards — Secretariat
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REVISION OF KENYA STANDARDS
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In order to keep abreast of progress in industry, Kenya standards shall be regularly reviewed. Suggestions
Ffor improvement to published standards, addressed to the Managing Director, Kenya Bureau of Standards,
are welcome.
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© Kenya Bureau of Standards, 2008
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Copyright. Users are reminded that by virtue of Section 25 of the Copyright Act, Cap. 12 of 2001 of the Laws of Kenya, copyright
Isubsists in all Kenya Standards and except as provided under Section 26 of this Act, no Kenya Standard produced by Kenya Bureau of
VStandards may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing
from the Managing Director.

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ii © KEBS 2008 — All rights reserved
KENYA STANDARD KS 1884-1:2008
ICS 33.120.40

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Specification — Accessories for use in
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antenna installations —
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Part 1: Splitters
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VKENYA BUREAU OF STANDARDS (KEBS)

EHead Office: P.O. Box 54974, Nairobi-00200, Tel.: [phone], 602350, Mobile: [phone];
Fax: (+254 020) 604031
E-Mail: [email protected], Web:http://www.kebs.org
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KEBS Coast Region KEBS Lake Region KEBS North Rift Region
CP.O. Box 99376, Mombasa 80100 P.O. Box 2949, Kisumu 40100 P.O. Box 2138, Nakuru 20100
Tel: [phone] Tel: [phone],22396 Tel: [phone], 210555
Fax: [phone] Fax: [phone]
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E-mail: [email protected] E-mail: [email protected]
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© KEBS 2008 — All rights reserved iii
KS 1884-1:2008

FOREWORD
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This Kenya standard was prepared by the Communication Equipment under the mandate of the Electrical
0Industry Standards Committee in accordance with the procedures of the Bureau and is in compliance with
Annex 3 of the WTO/TB Agreement.
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RNormative and informative annexes

EA 'normative' annex is an integral part of a standard, whereas an 'informative' annex is only for information
and guidance.

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Summary of development

,This Kenya Standard, Amendments issued since publication
Thaving been prepared
Amd. No. Date Text affected
by the Communication
FEquipment Technical
Committee was first
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approved by the
National Standards
RCouncil in December
2008
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iv © KEBS 2008 — All rights reserved
PD/09/01/2005

8 Contents

01  Scope .................................................................................................................................................... 1 
02  Normative references ........................................................................................................................... 1 
3  Definitions ............................................................................................................................................. 1 
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4  General requirements ........................................................................................................................... 1 

R4.1  Material ................................................................................................................................................. 1 
4.2  Corrosion protection ............................................................................................................................. 2 
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5  Mechanical requirements ...................................................................................................................... 2 
B5.1  Terminal robustness ............................................................................................................................. 2 
5.2  Sealing .................................................................................................................................................. 2 
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5.3  Continuity between input and output — outer cable terminals ............................................................. 2 
6  Electrical requirements ......................................................................................................................... 2 
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6.1  Amplitude frequency response of outputs ............................................................................................ 2 
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6.2  Mutual isolation between outputs ......................................................................................................... 2 
6.3  Return loss ............................................................................................................................................ 3 
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6.4  Component radiation characteristic ...................................................................................................... 3 
7  Test methods ........................................................................................................................................ 3 
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T7.1  Corrosion protection test ....................................................................................................................... 3 
7.2  Test for terminal robustness ................................................................................................................. 3 
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7.3  Sealing test ........................................................................................................................................... 4 
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7.4  Test for amplitude frequency response of outputs ............................................................................... 4 
7.5  Test for mutual isolation between outputs ............................................................................................ 4 
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7.6  Test for return loss ................................................................................................................................ 5 
D7.7  Test for component radiation characteristics ........................................................................................ 5 
7.8  Test for continuity between input and output — outer cable terminals ................................................. 9 

W8  Packing and marking ............................................................................................................................ 9 
8.1  Packing ................................................................................................................................................. 9 
E8.2  Marking ............................................................................................................................................... 10 
Annex A (informative) The absorbing clamp and its application for the measurement of interference power 16 
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VAnnex B (informative) The stop filter .............................................................................................................. 19 

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© KEBS 2006 — All rights reserved v
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KENYA STANDARD KS 1884-1:2008
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Specification — Accessories for use in antenna installations — Part 1:
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Splitters

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1 Scope
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This part of KS 1884 specifies the mechanical and electrical requirements for splitters for use in antenna
Binstallations both indoors and outdoors, covering the VHF/UHF television and VHP sound broadcast bands.

O2 Normative references

The following referenced documents are indispensable for the application of this Kenya Standard. For dated
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references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
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IEC 60068-2-11, Basic environmental testing procedures — Part 2-11: Tests — Test Ka: Salt mist
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IEC 60068-2-18, Environmental testing — Part 2-18: Tests — Test R and guidance: Water

,IEC 60068-2-21, Environmental testing — Part 2-21: Tests — Test U: Robustness of terminations and
Tintegral mounting devices

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IEC 60934, Circuit-breakers for equipment (CBE)

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3 Definitions

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For the purposes of this part of KS 1884, the following definitions apply:

D3.1
acceptable
acceptable to the authority administering this standard, or to the parties concluding the purchase
Wcontract, as relevant

3.2
Emutual isolation
isolation between outputs
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V3.3
return loss
Ethe difference between the forward voltage (or current) and the reflected voltage (or current) at the splitter
input terminals, expressed in decibels
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3.4
splitter

Ca passive unit that splits the input signal into several outputs that are normally of uniform signal level

3.5
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through-loss
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the reduction in signal level between input and output
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4 General requirements
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4.1 Material
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Splitters and mounting facilities shall be fabricated from a material that is suitable for use in the environment
in which the splitter is intended to be used.
© KEBS 2008 — All rights reserved 1
KS 1884-1:2008

8Non-metallic materials used shall be stabilized to ultraviolet (UV) light.

04.2 Corrosion protection

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When a splitter and its mounting facilities, that are intended for outdoor use, are tested in accordance with
27.1, they shall show no sign of corrosion. (See also 6.1.)

5 Mechanical requirements
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5.1 Terminal robustness
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The requirement given below applies only to splitters where screw type terminal cable connections are
Bincorporated. It does not apply where suitable terminal sockets are fitted.

OThe input and output cable connections shall be so designed that they will accommodate a 75 Q coaxial
cable (of dimensions specified by the splitter manufacturer) in such a way that the characteristic impedance
of the cable is not affected. When the splitter is tested in accordance with 7.2, there shall be no sign of
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damage or deformation of the cable or terminals and the cable shall not have become dislodged.

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5.2 Sealing

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When a splitter that is intended for use outdoors is tested in accordance with 7.3, no water shall have
entered the housing.

,5.3 Continuity between input and output — outer cable terminals
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When tested in accordance with 7.8, the circuit-breaker shall have tripped on each performance of the
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procedure in 7.8.2.2. When the track between the terminals is being inspected, there shall be no sign of
deterioration owing to generation of heat.
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6 Electrical requirements
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6.1 Amplitude frequency response of outputs
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The manufacturer shall state the frequency response of the outputs and shall give the through-loss, in

decibels, at the extreme points of the specified frequency range. These values are the "nominal values", and
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the "nominal line" is the straight line that joins these points.

When determined in accordance with 7.4, the through-loss deviation, at any frequency, from the nominal line
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shall not exceed the following:

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⎯ FM band - 1 dB;
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⎯ Band III - 1 dB; and
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⎯ Band IV and V - 2 dB.
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When a splitter that is intended for outdoor use is again tested in accordance with 7.4, after having been
subjected to the corrosion protection test of 7.1, the results of this second test shall not differ from those of
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the first.

I6.2 Mutual isolation between outputs
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When determined in accordance with 7.5, the minimum isolation between outputs, in decibels, in the
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frequency range stated by the manufacturer shall, at a frequency of 80 MHz but reduced by 1.5 dB per
octave, be equivalent to:
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20 + 20 log(U /U )
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where

2 © KEBS 2008 — All rights reserved