Iec 61196 1 116 2015

9 5.4.1 Test in trument deviation calc lation... COA XIA L COMMUNICA TION CABLES – Part 1-116: Electrical test methods – Test for impedance with time domain reflectometry TDR This p rt o

Coax ial communicat ion cables –

Part 1- 116: Elect rical t est met hods – T est for impedance w it h t ime domain

reflect omet ry (TDR)

Part ie 1- 116: Mét hodes d'essais élect riques – Essai d'mpédance par

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Part 1- 116: Elect rical t est met hods – T est for impedance w it h t ime domain

reflect omet ry (TDR )

Part ie 1- 116: Mét hodes d'ess is élect riques – Essai d'mpédance par

INT ERNAT IONAL

ELECT ROT ECHNICAL

ELECT ROT ECHNIQUE

INT ERNAT IONALE

®

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FOREWORD 3

1 Sco e 5

2 Normative ref eren es 5

3 Terms an def i ition 5

4 Prin iples 5

5 Test method 6

5.1 Eq ipment 6

5.2 Test sample 7

5.3 Proced re 7

5.4 Calc lation of test data 9

5.4.1 Test in trument deviation calc lation

9 5.4.2 Cor ection calc lation 9

6 Test re ort 9

7 Req irement 9

Fig re 1 – Prin iple of TDR me s rement 6

Fig re 2 – Test sample 7

Fig re 3 – Z air test set-up 8

Fig re 4 – Test set-up with test sample 8

INTERNATIONAL ELECTROTECHNICAL COMMISSION

1 Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org niz tio for sta d rdiz tio c mprisin

al n tio al ele trote h ic l c mmite s (IEC Natio al Commite s) Th o je t of IEC is to promote

intern tio al c -o eratio o al q e tio s c n ernin sta d rdiz tio in th ele tric l a d ele tro ic f i ld To

this e d a d in a ditio to oth r a tivitie , IEC p bls e Intern tio al Sta d rd , Te h ic l Sp cific tio s,

Te h ic l Re orts, Pu lcly Av ia le Sp cific tio s (P S) a d Guid s (h re f ter refer e to a “IEC

Pu lc tio (s)”) Th ir pre aratio is e tru te to te h ic l c mmite s; a y IEC Natio al Commite intere te

in th s bje t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n n

-g v rnme tal org niz tio s laisin with th IEC als p rticip te in this pre aratio IEC c la orate clo ely

with th Intern tio al Org niz tio f or Sta d rdiz tio (ISO) in a c rd n e with c n itio s d termin d b

a re me t b twe n th two org niz tio s

2) Th f ormal d cisio s or a re me ts of IEC o te h ic l maters e pre s, a n arly a p s ible, a intern tio al

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th later

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p te t rig ts IEC s al n t b h ld re p n ible for id ntif yin a y or al s c p te t rig ts

The International Stan ard IEC 61 9 -1-1 6 has b en pre ared by s bcommit e 4 A:

Co xial ca les, of IEC tec nical commite 4 : Ca les, wires, waveg ides, R.F con ectors,

R.F an microwave p s ive comp nents an ac es ories

The text of this standard is b sed on the f ol owin doc ments:

Ful inf ormation on the votin f or the a proval of this stan ard can b f ou d in the re ort on

votin in icated in the a ove ta le

This publ cation has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

This stan ard is inten ed to b re d in conju ction with IEC 61 9 -1 It is b sed on the

secon edition (2 0 ) of that stan ard

A l st of al p rts of the IEC 61 9 series, publ s ed u der the general title: Co xial

c mmu ic tion c bles, can b f ou d on the IEC we site

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

the sta i ty date in icated on the IEC we site u der "ht p:/we store.iec.c " in the data

related to the sp cif i publ cation At this date, the publ cation wi b

• reconfirmed,

• with rawn,

• re laced by a revised edition, or

• amen ed

COA XIA L COMMUNICA TION CABLES –

Part 1-116: Electrical test methods –

Test for impedance with time domain reflectometry (TDR)

This p rt of IEC 61 9 a pl es to co xial commu ication ca les It sp cifies test method f or

determinin the imp dan e of co xial commu ication ca les with time domain reflectometry

(TDR)

The f ol owin doc ments, in whole or in p rt, are normatively ref eren ed in this doc ment an

are in isp n a le f or its a pl cation For dated referen es, only the edition cited a ples For

u dated referen es, the latest edition of the referen ed doc ment (in lu in an

amen ments) a pl es

IEC 61 9 -1:2 0 , Co xial c mmu ic tion c bles – P art 1: Ge eric sp cific tion – Ge eral,

definit io s a d re uireme ts

IEC 6 15 -1-1, Metallic c mmu ic tion c bles test meth ds – P art 1-1: Ele tric l –

Me sureme t of th p lse/ste return los in th fe u n y d omain usin t he I nverse Discrete

Fo rier Tra sformat io (IDFT)

3 Terms and def initions

For the purp se of this doc ment, the terms an definition given in IEC 61 9 -1 a ply

4 Principles

When a ste f un tion sig al is sent to ca le u der test an the signal p s throu h the test

p int of ca le, p rt of the energ is reflected The distan e (L) f om the input en to the test

p int can b calc lated by me s rin the total sig al travel n time ( ) as Fig re 1 The

c an e of imp dan e can b also calc lated by me s ring the ampl tu e of the input an

reflected sig al, as s own in Fig re 1

Figure 1 – Principle of TDR me s reme t

The distan e L of the test p int can b determined by:

r22

L

(1)

The imp dan e of the test p int s ould b :

inre

UU

=r

(2)

rr

−+

×

=

11

0iLZ

where

L is the distan e of the test p int, in metres (m);

v is the pro agation velocity, in metres p r secon (m/s);

t is the total sig al travel n time as s own in Fig re 1, in secon s (s);

c is the pro agation velocity in f re sp ce (3 × 10

Test in trument: A time domain ref lectometer (TDR) u in a ste voltage with enou h

resolution an ac urac an rise time les than 10 ps, or a vector network analy er (VNA)

with time domain ca a i ty u in a ste f un tion in ac ordan e with IEC 6 15 -1-1

i0

L

t

Ref eren e comp nents: A precision air l ne an a precision lo d with the same nominal

The proced re is as fol ows

a) After ful y prehe tin test in trument, set the test mode to me s re imp dan e of the test

sample

b) The precision air l ne s al b con ected b twe n the test in trument an the precision

lo d, as s own in Fig re 3 Set the test ran e of test in trument to reg lar imp dan e

ran e of the precision air l ne, an record the average imp dan e Z

air

L

sample

IE C

For hig er precision, test lead s al b as s ort as p s ible.

c) In ert the test sample b twe n the precision air lne an the precision lo d, as s own in

Fig re 4 Set test ran e of test in trument to me s re within the confines of “L

d) The test sample s al then b turned en -to-en an the me s rement re e ted as 5.3 c).

5.4 Calc lation of te t data

5.4.1 Te t instrume t de iation c lc lation

The imp dan e deviation of test in trument is given by:

air0Z

• ambient temp rature, in degre Celsiu (°C);

• p rameters set in the VNA (when a pl ca le);

• the toleran e of the precision lo d an air l ne;

Fig re 4 – Montage d'es ai avec éc anti on d'es ai 16

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

Partie 1-116: Méthodes d'essais électriques –

Essai d' mpédance par réflectométrie dans le domaine temporel (TDR)

1 L Commis io Ele trote h iq e Intern tio ale (IEC) e t u e org nis tio mo diale d n rmals tio

c mp s e d le s mble d s c mité éle trote h iq e n tio a x (Comité n tio a x d l EC) L’ EC a p ur

o jet d fa oris r la c o ératio intern tio ale p ur to te le q e tio s d n rmals tio d n le d main s

d léle tricité et d léle tro iq e A c t ef fet, l EC – e tre a tre a tivité – p ble d s Norme intern tio ale ,

d s Sp cif i atio s te h iq e , d s Ra p rts te h iq e , d s Sp cific tio s a c s ible a p blc (P S) et d s

Guid s (ci-a rè d n mmé "Pu lc tio (s) d l EC" L ur éla oratio e t c nfié à d s c mité d'étu e , a x

tra a x d s u ls to t Comité n tio al intére s p r le s jet traité p ut p rticip r L s org nis tio s

intern tio ale , g u ern me tale et n n g u ern me tale , e lais n a e l EC, p rticip nt é aleme t a x

tra a x L’EC c la ore étroiteme t a e lOrg nis tio Intern tio ale d Normals tio (ISO), s lo d s

c n itio s f i é s p r a c rd e tre le d u org nis tio s

2) L s d cisio s o a c rd off i iels d l EC c n ern nt le q e tio s te h iq e re ré e te t, d n la me ure

d p s ible, u a c rd intern tio al s r le s jets étu ié , éta t d n é q e le Comité n tio a x d l EC

intére s s s nt re ré e té d n c a u c mité d’étu e

3) L s Pu lc tio s d l EC s pré e te t s u la f orme d re omma d tio s intern tio ale et s nt a ré e

c mme tele p r le Comité n tio a x d l EC To s le ef forts rais n a le s nt e tre ris a n q e l EC

s'a s re d le a titu e d c nte u te h iq e d s s p blc tio s; l EC n p ut p s être te u re p n a le d

lé e tu le ma v is uti s tio o interprétatio q i e e t f aite p r u q elc n u uti s te r f i al

4) Da s le b t d'e c ura er lu iformité intern tio ale, le Comité n tio a x d l EC s'e g g nt, d n to te la

me ure p s ible, à a plq er d f aç n tra s are te le Pu lc tio s d l EC d n le rs p blc tio s n tio ale

et ré io ale To te div rg n e e tre to te Pu lc tio s d l EC et to te p blc tio s n tio ale o

ré io ale c r e p n a te d iv nt être in iq é s e terme clairs d n c s d rnière

5) L’EC ele-même n f ournit a c n ate tatio d c nf ormité De org nisme d c rtif i atio in é e d nts

fo rnis e t d s s rvic s d'é alu tio d c nformité et, d n c rtain s cte rs, a c d nt a x marq e d

c nformité d l EC L’ EC n'e t re p n a le d'a c n d s s rvic s eff ectu s p r le org nisme d c rtific tio

in é e d nts

6) To s le uti s te rs d iv nt s'a s rer q ' s s nt e p s e sio d la d rnière é itio d c te p blc tio

7) Au u e re p n a i té n d it être imp té à l EC, à s s a ministrate rs, emplo é , a xi aire o ma d taire ,

y c mpris s s e p rts p rtic lers et le membre d s s c mité d'étu e et d s Comité n tio a x d l EC,

p ur to t préju ic c u é e c s d d mma e c rp rels et matériels, o d to t a tre d mma e d q elq e

n ture q e c s it, dire te o in ire te, o p ur s p orter le c ûts (y c mpris le f rais d ju tic ) et le

d p n e d c ula t d la p blc tio o d luti s tio d c te Pu lc tio d l EC o d to te a tre

Pu lc tio d l EC, o a cré it q i lui e t a c rd

8) L'ate tio e t atiré s r le réf ére c s n rmativ s cité s d n c te p blc tio L'uti s tio d p blc tio s

référe c e e t o lg toire p ur u e a plc tio c re te d la pré e te p blc tio

9) L’ate tio e t atiré s r le f ait q e c rtain d s éléme ts d la pré e te Pu lc tio d l EC p u e t faire

lo jet d droits d bre et L’EC n s urait être te u p ur re p n a le d n p s a oir id ntif i d tels droits

d bre ets et d n p s a oir sig alé le r e iste c

L Norme internationale IEC 61 9 -1-1 6 a été éta le p r le sou -comité 4 A: Câ les

co xiau , d comité d’étu es 4 de l IEC: Câ les, fi s, g ides d'on es, con ecteurs,

comp sants p s ifs p ur micro-on e et ac es oires

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