IS 14231-5: Cabled Distribution System for Television and Sound Signals, Part 5: Headend

29 Pages·1995·2.2 MB·English

by  Bureau of Indian Standards

इंटरनेट मानक
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.
“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 14231-5 (1995): Cabled Distribution System for
Television and Sound Signals, Part 5: Headend [LITD 7:
Audio, Video and Multimedia Systems and Equipment]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

Indian Standard
CABLEDDISTRIBUTION SYSTEMFOR
AND SOUND SIGNALS-
NOISIVELET
SPECIFICATIQN
PART 5 HEADEND
UDC 621-396-621.2 : 621-397-743

0 BIS 1995
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
July 1995 Price poorG 9
oidaR snoitacinummoC lanoitceS ,eettimmoC DTL 20
FOREWORD
sihT naidnI dradnatS ( traP 5 ) was detpoda yb eht uaeruB fo naidnI Standards, retfa eht tfard dezilanif
yb eht oid’aR snoitacinummoC lanoitceS eettimmoC had neeb devorppa yb eht scinortcelE and -eleT
noitacinummoc noisiviD .licnuoC
ehT seires fo standards no delbac noitubirtsid metsys rof noisivelet and dnuos signals sesirpmoc eht
gniwollof parts:
traP 1 ytefaS stnemeriuqer
traP 2 citengamortcelE ytilibitapmoc rof metsys and stnenopmoc (
under preparation )
traP 3 evitcA laixaoc dnabediw noitubirtsid stnenopmoc
traP 4 evissaP laixaoc dnabediw noitubirtsid stnenopmoc
traP 5 dnedaeH
sihT standard ( traP 5 ) sebircsed eht scitsiretcarahc and muminim stnemeriuqer fo eht stnempiuqe
desu ni eht sdnedaeh fo lairtserret tsacdaorb and etilletas gniviecer .smetsys
sihT standard is ylegral desab no CEI tnemucod G21 ( ttceS ) 131 delbaC noitubirtsid metsys rof
noisivelet and dnuos signals : traP 5 .’dnedaeH
roF eht esoprup fo gnidiced rehtehw a ralucitrap tnemeriuqer fo this standard is deilpmoc ,htiw eht
lanif ,eula,v devresbo ro ,detaluclac gnisserpxe eht tluser fo a tset ro ,sisylana shall eb dednuor ni
off
ecnadrocca htiw SI 2 : 1960 seluR‘ rof gnidnuor ffo laciremun seulav ( rerised )‘. ehT rebmun fo -ingis
tnacif secalp deniater ni eht dednuor ffo eulav dluohs eb eht emas as that fo eht deificeps eulav ni this
standard.
SI 14231 ( Part 5 ) : 1995
Indian Standard
DELBAC NOITUBIRTSID SYSTEM ROF
NOISIVELET AND SOUND SLANGIS -
NOITACIFICEPS
PART 5 HEADEND
1 EPOCS 2 SECNEREFER
2.1 ehT naidnI sdradnatS detsil ni xennA Q are -secen
1.1 sihT dradnats (Part 5) srevoc scitsiretcarahc of the yras stcnujda ot siht .dradnats
tnempiuqe desu ni the sdnedaeb of lairtserret tsacdaorb
dna etilletas gniviecer smetsys tuohtiw( etilletas -tuo 3 SNOITINIFED
door .)stinu ehT dradnats sniatnoc the muminim 3.1 roF the esoprup of siht ,dradnats gniwollof smret
stnemeriuqer ot eb ,tem data sheets hcihw evah ot eb dna snoitinifed llahs .ylppa
dehsilbup dna test snoitacificeps yrassecen for laiceps
.stnemerusaem 3.1.1 Headend
tnempiuqE hcihw si detcennoc neewteb gniviecer
1.2 sihT dradnats ylno slaed htiw the secafretni
sannetna or other langis secruos dna the redniamer of
neewteb dnedaeh stnenopmoc dna snialpxe the
the delbac noitubirtsid metsys ot process the slangis ot
noitcnuf of the secived fi siht si yrassecen ot troppus
eb .detubirtsid
the noitpircsed of the .secafretni
SETON
1.3 sihT dradnats does ton revoc coder, ,redocsnart
1 nA elpmaxe of dnedaeh si nevig ni .giF 1.
,retpyrcne ,retpyrced etc. fI hcus secived are desu ni
,sdnedaeb ebt tnaveler sretemarap for ,FR ,oediv oidua 2 ehT dnedaeh ,yam for ,elpmaxe esirpmoc annetna
dna data secafretni evah ot eb tem .ylgnidrocca ,sreifilpma ycneuqerf ,sretrevnoc ,srenibmoc separators
dna .srotareneg
OUTDOOR INDOOR
I TRANS-
CODER I
I

VHF/UHF

/
FMTV
1. IF SAT
i
___-_-_._-._c
FIG. 1 EXAMPLEOHFE ADEND
1
SI 14231( Part 5 ) : 1995
3.1.2 Local Headend 3.1.13A utomatic Gain Control (AGC)
A dnedaeh hcihw si yltcerid detcennoc ot the metsys The citamotua lortnoc of a ecived ot niatniam tnatsnoc
the level of the langis at sti ,tuptuo gnisu the langis ot
kuurt feeders or ot a short luah kuurt‘ feeder -ecalper
eb dellortnoc as the lortnoc .sulumits
’tnem .knil
3.1.3 Remote Hendend 3.1.14 Frequency Response
ehT niag or ssol of a metsys dettolp tsniaga .ycneuqerf
A dnedaeh morf hcihw slangis are dereviled ot a lacol
dnedaeh aiv a ecnatsid-gnol lairtserret or etilletas .knil 3.1.15 Intermodulation
3.1.4 MATVHeadend The process yberehw ytiraenil-non ni tnempiuqe ni a
metsys secudorp suoirups tuptuo slangis dellac( -retni
VTAM sdnedaeh are desu ni skcolb of stalf dna ni
noitaludom )stcudorp at seicneuqerf hcihw are raenil
pu-tliub setis ot feed dezimotsuc VT slennahc otni the
snoitanibmoc of those of the tupni .slangis
esuoh krowteu or the rups .krowten
3.1.5 Headend for Individual Reception 3.1.16 Carrier-to-Intermodulation Ratio
A duedaeh gniylppus a elgnis .rebircsbus ehT metsys of The ecnereffid ni slebiced neewteb the reirrac level at
a deificeps t&p ni a metsys dna the level of a deificeps
siht epyt yam edulcni eno or erom annetna .steltuo
noitaludomretni tcudorp or noitanibmoc of .stcudorp
3.1.6 Antennrr Amplifier
3.1.17 Carrier-to-Noise Rati?
AU reifilpma netfo( a wol esion )epyt detaicossa htiw
na .annetna The ecnereffid ni slebiced ueewteb the noisiv of dnuos
reirrac level at a nevig tniop ni the metsys dna the esion
3.1.7 Frequency Converter level at that tniop derusaem( nihtiw a htdiwdnab -pa
A ecived for gnignahc the reirrac ycneuqerf of eno or etairporp ot the noisivelet or oidar metsys ni .)esu
erom slangis roirp ot uoissimsnart no a feeder. 3.1.18 Well-Matched
3.1,s Combiner A test pu-tes si dias ot eb nehw’dehctam-llew‘ the port
A ecived ni hcihw the slangis gnivirra at two or erom or ports gnicaf the tnempidqe rednu test evah a
tupni ports are fed ot a elgnis tuptuo port. nruter ssol oitar of at tsael 20 Bd evitaler ot the metsys
.ecnadepmi
ET’ON - emoS smrof of siht ecived yam eb desu ni eht
esrever noitcerid sa a .rettilps 4 SEDARG
3.1.9 Decibel Ratio
4.1 gnidroccA ot the snoitinifed ni 3, the sdnedaeh are
ehT lebiced oitar of two seitituauq of power tP dna deifissalc otni the gniwollof three ytilauq :slevel
si denifed :yb
p2 edarG 1 lacoL buH/dnedaeh duedaeh
edarG 2 etomeR dnedaeh
10 gol 2 )3ld(
edarG 3 VTAM laudividnlfdnedaeh noitpecer
dnedaeh
3.1.10 Level

4.2 sA lacitcarp ecneirepxe has ,nwohs these sepyt
ehT level of yna power ,P si the lebiced oitar of that

teem lla lacinhcet stnemeriuqer yrassecen for gniylppus
power ot the dradnats ecnerefer power PO, that :si
a muminim langis ytilauq ot the .srebircsbus‘ sihT -salc
noitacifis llahs ton eb deredisnoc as a tnemeriuqer
10 gol 2 tub as na uoitamrofni for sresu dna srerutcafunam no
0 the muminim ytilauq sdradnats of the lairetam -er
sihT yam he expressed ni slebiced evitaler( ot 1 pV ni deriuq ot llatsni skrowteu of tnereffid .sezis ehT
75 Q‘) or cronl ylpmis ni Bd (pV) fi there si on ksir of uretsys operator has ot tceles the etairporppa lairetam
.ytiugibma or guiteeiu the ~uuluiuim laugis ytilauq at the
s’rebircsbus .teltuo
,I‘I’ON -- y(t ’rewop- ni noitaler ot a detaludom-noisiv
reirrac si lnl;em rewop at eht kaep fo eht noitaludom
5 ECNAMROFREP STNEMEKIJIQER DNA
epolevne taht( ,si eht mumixam smr egatlov derauqs dna
dedivid y>I ,~h! .)ecnats&r GNIRJISAEM SDOHTEM
3.1.11 Alfcwrtrfion 5.0 gnirusaeM Methods
ehT r~?citr;l;n‘tttii ynafo metsys si the lebiced oitar of the ehT liated noitpircsed of the gnirusaem serudecorp for
lupni power ot rhi tuptuo power. gninimreted the suoirav sretemarap si ucvig ui the
evitcepser .scxcnua
3.1.12 ni&
5.1 ytefaS
ehT niag yur;lo metsys si cbt lebiced oitar ofthc tuptuo
power ot the tupni power. ehT ytefas stnemeriuqer of lla stu”nopluoc llahs -ltoc
1tnof ot SI 14231 ( Part 1 ) : 1995, where .elbacilppa
2
IS 14231 ( Part 5 ) : 1995
5.2 CME 6.2 Outdoor
5.2.1 ehT stimil fo noitaidar dna ytilibitpecsus ot -retui
6.2.1 stuemeriuqeR for saunetna for lairtserret -pecer
ecneref for lla evissap stuenopmoc derevoc yb siht
uoit are as uevig ni elbaT 5.
dradnats are dial nwod ni snnet of rieht gniueercs
.noitaunetta 6.2.2 Antennu Amplifier
5.2.2 ehT gnineercs noitaunetta llahs mrofnoc ot SI
See the gnidnopserroc sretemarap of 6.1.2.
14231 ( Part 2 ) .)noiturayeryretcnu(
7 ATAD STEEHS TNEMERIJrQER
5.3 Environmental
srerutcafunaM llahs hsilbup latnenmorivue -amrofni 7.0 ehT ecnadiug for gnitfard data sheets si 1revig .woleb
noit no rieht stcudorp ot elbane sresu ot egduj rieht 7.1 ehT tinu suoitacificeps llahs eb dehsilbup uo data sheets.
ytilibatius htiw regards ot ruof uiam ;stuemeriuqer
storage, ,noitatropsnart uoitallatsui dua .noitarepo 7.1.1 General
ehT noitatneserp of the noitamrofni llahs mrofuoc htiw
sA ot latnemnorivne snoitiduoc the data sheets llahs at
the stuemeriuqer of the gniwollof .snoitacilbup
tsael uiatuoc the seulav gnidrocca ot 5.3.4.
5.3.1 egurorS detalumis( effects of)
SI 9001 (Part 14) : 1979 7.2 roodnI - VT MA( dna )MF
5.3.2 Transportation 7.2.1 Maximum Admissible Output Voltage
riA thgierf denibmoc(
yficepS the mumixam elbissimda tuptuo egatlov no the
dloc dna wol )erusserp SI 9000 (Part 31) : 1978
data sheets as llew as no the secived .sevlesmeht
Road tropsnart SI 9000 (Part teS/7 2) :
ehT seulav dilav for the muminim -retni-ot-reirrac
pmub( test) 1979
ecneref soitar are as uevig ni elbaT 6.
Road tropsnitrt SI 9000 (Part teS/7 1) :
(shock test) 1979 7.2.2 Operating Range
5.3.3 noitlhlutsnI or Muintenunce State muminim dna mumixam elbissimda tuptuo -lov
tages ni order ot eninneted the gnitarepo ,egnar fi
Drop dna elppot test SI 9000 (Part teS/7 3) : 1979
.yrassecen
eerF llaf test SI 9000 (Part teS/7 4) : 1979
7.2.3 Kind of TV-Standard
5.3.4 Operution
yficepS uo the data sheets the VT )s(dradnats hcihw
citamilC yrogetac of tnenopmoc or tnempiuqe for evah neeb set pu for the .secived (See xennA F for
storage dna uoitarepo as denifed ni gniwollof -acilbup dednemmocer ytivitceles margaid for tnecajda lelmahc
:snoit ).noissimsnart
lareneG SI 9000 (Part 1) : 1988 7.2.4 Clamp
dloC SI 9000 (Part teS/2 )4-l : 1977 yficepS uo the data sheets hcihw pmalc uoisserppus
yrD heat SI 9000 (Part teS/3 )5-l : 1977 ecuannofrep has ueeb .tem (Method of :tnemerusaem
pmaD heat SI 9000 (Part teS/S )2-l : 1981 reduu ).noitaredisnoc
uoitarbiV SI 9000 (Part 8) : 1981 7.2.5 esioN Figure
)ladiosunis(
7.2.5.1 Devices without AGC
6 LANGIS STNEMERIUQER State the worst eulav at mumixam uiag ni the deificeps
.egnar sihT egnar si debircsed ni xennA E.
6.1 Indoor tinJI 7.2.5.2 Devices with AGC
6.1.1 lareneG stnemeriuqer for power ylppus are 230 State the graph for esiou ui the deificeps gnitarepo .egnar
V %01- + 6% SOHz for edarG 1, edarG 2 dna ylevitauretlA N/C or N/S yam eb stated (see .giF 2).
edarG 3. 7.2.6 Dutu S&uls, Description of Interfuce
6.1.2 FR sretemarap stuemeriuqer for roodui tinu are roF data slaugis the guiwollof seulav llahs eb stated uo
as uevig ni elbaT 1. the data :steehs
6.1.3 oediV sretemarap stuemeriuqcr are as ucvig ui - rcuadepml
elbaT 2. - egatloV
6.1.4 oiduA sretemarap stnemeriuqer arc as nevig ni - ytiraloP
elbaT 3.
- tiB rate
6.15 FI )VT-MA( : stucmeriuqeR are as uevig ui
- locotorP
elbaT 4.
- rot’ctnuoC
3
IS 14231 ( Part 5 ) : 1995
Table 1 RF Parameters Requirements
( Cluuse 6.1.2 )
SI sretemaraP edarG 1 edarG 2 Grade 3 Remarks
No.
(1) )2( (3) (4) (5) )6(
9 ecnadepmI )tupni( 50 JS ro 75 e 75 a 7.5 LS
)ii ecnadepmI )tuptuo( 75 9 75 & 75 C2
)iii nruteR ssol ,tupni( )tuptuo rof 218 Bd 214 Bd a10 Bd xennA E
See
stnenopmoc
)vi nruteR ssol tuptuo( fo )dnedaeh ssalC B ssalC B ~10 Bd rof ssalc ,B ees s1
14231 traP( 3) :
1995
)v noitcetorP tsniaga rehto slangis - - teS SI 14231
ni eht VT-MF egnar ( traP 2 ) ( under
pepration )
)iv suoirupS slangis ni ,tuptuo ni ~60 Bd 260 Bd a60 Bd od
VT-MA slennahc
)iiv suoirupS slangis ni ,tuptuo ni 260 Bd ~60 Bd ~60 Bd eeS xennA D
TV lennahc 40 . . . . . . .862 zHM
)iiiv egamI noitcejer rof VT-MA dna 260 Bd 260 Bd r4(1 Bd
MF oidar
)xi lacoL rotallicso langis at eht 260 Bd 260 Bd 260 Bd
.tuptuo ecnatsiD ot .niM
gnitarepo level rof VT-MA dna
MF oidar
)x ycneuqerF ytilibatsni rof MF 215 kHz ~15 kHz 5I* kHz
oidar
)ix ycneuqerF ytilibatsni rof -MA 57* kHz ~75 kHz 57* kHz
TV tuohtiw txetelet
VT-MA htiw txetelet it50 zHk OS* kHz 250 kHz
)iix dnuoS reirracretni )onom( fi ti si 6 kHz )reirrac( 25 kHz SIi kHz
degnahc
)iiix dnuoS reirracretni laud/oerets( ehT ecnereffid fo
)dnuos fi ti si degnahc eht dnuos -bus
reirrac sah ot eb
deniatniam

noisicerp( enil-flah
)tesffo
)vix ytilibatS fo laudiser reirrac 10+t5% %O;+ol 01 +lO
edutilpma 0 %
)vx Output egnar rof latigid etilletas 330 MHz/450 zHM268/zHM
oidar slangis
)ivx ycneuqerF ytilibats VT-MF 2 200 kHz * 200 kHz * 200 kHz
retrevnoc
)iivx Hum noitaludom eulaV dna dohtem
fo tnemerusaem
nevig ni SI 14231
traP( 3) : 1995
IS 14231( Part 5 ) : 1995
-k--l
mw
&FFMTING
FIG.2 EXAMPIFJZO RD IAGRAMOF N F, C/N ORS /N FOR
DEVICEWS IIHA GC
Table 2 Video Parameters Requirements
( Clause 6.1.3 )
r?:.
Parameters Grade 1 Grade 2 Grade 3 Notes
(1) (2)
(3) (4) (5) (6)
9 ecnadepmI 75 Q 75 L-2 7.5 cz BNC rotcennoc SOQ
si dednemmocer
toD[ : LID 16
(1753)] r&w(
prepration)
nruteR ssol r34dB ~26 Bd 226 Bd nI lanimon
ii)
noissimsnart egnar
)iii egatloV ppVl.O*l 1 f 0.1 ppv I f 0.3 ppv

)vi ytiraloP evitagen .cnys evitagen .cnys evitagen .cnys

)v te&O taegatlov 7.5 Q daol 52.75 V ~2.75 V ~2.75 V
Table 3 Audio Parameters Requirements
( Clause 6.1.4 )
SI Parameters Grade 1 Grade 2 Grade 3 Remarks
No.
(1) 4( (3) 4( (5) (6)
9 tupnl ecnadepmi 2600 L-2 2.600 51 r600 SL See 7.2.16
)ii Output ecnadepmi s30 s2 s30 s2 s30 L2 od
)iii egatloV W-M( 1.55 V,,, rof t30 kHz noitaived sdnopserroC ot +6
)rotaludom mBd at 60052 ;daol
dradnatS G/B ,,rj = 1 ,zHk -erp dna
sisahpme-ed 50 sp
)vi egatloV MP( oidar 1.55 V,,, rof 04* zW noitaived mf = 1 ,zHk -erp dna
)rotaludom sisahpme-ed 75u.s