Iec 60958 4 4 2016

The tran p rt f ormat is inten ed for u e with s ielded twisted-p ir ca le of con entional desig over distan es of up to 10 m at f rame rates of up to 5 kHz.. The tran p rt format def i

Digit al audio int er ace –

Part 4- 4: Professional appl cat ions – Physical and elect rical paramet ers

Partie 4- 4: Appl cat ions profe sionnel es – Paramètres phy siques et électriques

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Digit al audio int er ace –

Part 4- 4: Professional appl cat ions – Physical and elect rical paramet ers

Part ie 4- 4: A ppl cations professionnel es – Paramèt res phy siques et élect riques

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FOREWORD 4

INTRODUCTION 6

1 Sco e 7

2 Normative ref eren es 7

3 Terms an def i ition 7

4 Common features 8

5 Jit er 8

5.1 Output interface jt er 8

5.1.1 General 8

5.1.2 Intrin ic j t er 8

5.1.3 Jiter gain 9

5.2 Receiver j t er toleran e 10 An ex A (informative) Symb l rates an UI 1

An ex B (normative) Balan ed tran mis ion 12

B.1 General c aracteristic 12

B.1.1 Con g ration 12

B.1.2 Eq al sation 12

B.1.3 Ca le 12

B.2 Line driver c aracteristic 13

B.2.1 Output imp dan e 13

B.2.2 Sig al ampltu e 13

B.2.3 Balan e 13

B.2.4 Rise an fal times 13

B.3 Line receiver c aracteristic 13

B.3.1 Terminatin imp dan e 13

B.3.2 Maximum input sig als 14

B.3.3 Minimum input sig als 14

B.3.4 Receiver eq al zation 14

B.3.5 Common-mode rejection 15

B.4 Con ector 15

B.4.1 XLR con ector 15

B.4.2 8-way mod lar con ector 15

An ex C (normative) Co xial tran mis ion 17

C.1 General 17

C.2 Line driver c aracteristic 17

C.2.1 General 17

C.2.2 Output imp dan e 17

C.2.3 Sig al c aracteristic 17

C.3 Co xial ca le c aracteristic 18

C.4 Line receiver c aracteristic 18

C.4.1 General 18

C.4.2 Terminatin imp dan e 19

C.4.3 Maximum input sig als 19

An ex D (informative) Optical tran mis ion 21

D.1 Short haul 21

D.2 Medium haul 21

D.3 L n haul 21

Biblogra h 2

Fig re 1 – Intrin ic-j ter me s rement-f ilter c aracteristic 9

Fig re 2 – Jit er tran f er f un tion mas 10 Fig re 3 – Jit er toleran e template 10 Fig re B.1 – Simpl fied example of the con g ration of the circ it (b lan ed) 12 Fig re B.2 – Eye diagram, b lan ed receiver 14 Fig re B.3 – Su gested eq al zin c aracteristic f or a receiver o eratin at 4 kHz f rame rate 15 Fig re C.1 – Output sig al waveform 17 Fig re C.2 – Eye diagram, co xial receiver 19 Fig re C.3 – Eye p tern f or lon -distan e tran mis ion 2

Ta le A.1 – Symb l rate vers s sampl n freq en y 1

Ta le A.2 – UI (n ) vers s sampl n f req en y 1

Ta le C.1 – Output sig al c aracteristic 18

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

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

2) Th formal 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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e p n e arisin o t of th p blc tio , u e of, or rela c u o , this IEC Pu lc tio or a y oth r IEC

Pu lc tio s

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in is e s ble f or th c r e t a plc tio of this p blc tio

9) Ate tio is drawn to th p s ibi ty th t s me of th eleme ts of this IEC Pu lc tio ma b th s bje t of

p te t rig ts IEC s al n t b h ld re p n ible f or id ntifyin a y or al s c p te t rig ts

International Stan ard IEC 6 9 8-4-4 has b en pre ared by tec nical are 4: Digital s stem

interf aces an protocols, of IEC tec nical commit e 10 : Au io, vide an multimedia

s stems an eq ipment

This f irst edition, together with IEC 6 9 8-4-1 an IEC 6 9 8-4-2, can els an re laces the

IEC 6 9 8-4 publ s ed in 2 0 an its Amen ment 1:2 0 an con titutes a tec nical

revision

This edition in lu es the f ol owin sig if i ant tec nical c an es with resp ct to

IEC 6 9 8-4:2 0 with its Amen ment 1:2 0 :

a) s p ort f or a wider ran e of ph sical media;

b) s p ort f or a wider ran e of au io sampl n freq en ies;

The text of this stan ard is b sed on the fol owin doc ments:

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

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 "htp:/we store.iec.c " in the data

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

• with rawn,

• re laced by a revised edition, or

The two-c an el digital au io interf ace has b en widely u ed in a variety of profes ional

au io a pl cation that have re c ed b yon the vision of the original stan ard In p rtic lar,

a pl cation u in in re sed sampl n freq en ies an alternative ph sical media

Se aratin the stan ard into in e en ently-maintaina le p rts al ows, f or example, ad itional

tran mis ion media to b introd ced in the f uture by revisin IEC 6 9 8-4-4 without af f ectin

the other p rts of the IEC 6 9 8-4 series The p rts comprise:

Part 4-1: Au io content: def i es the f ormat f or codin au io u ed for the au io content It

sp cif ies the semantic of the au io data, in lu in the "val dity" f lag It also

sp cif ies the sampl n f req en y by ref eren e to AES5

Part 4-2: Metadata an s bcode: sp cif ies the f ormat f or inf ormation, metadata, or s bcode

tran mit ed with the au io data: prin ip l y the c an el statu but also u er data

an the au i ary bits Implementors wi note that the c r ent implementation

o tion ("Stan ard" an "En an ed") b th req ire that statu data b

implemented cor ectly in compl ant eq ipment

Part 4-4: Ph sical an electrical p rameters: sp cif ies the ph sical sig als that con ey the

bit stre m sp cif ied in IEC 6 9 8-1 The tran p rt f ormat is inten ed for u e with

s ielded twisted-p ir ca le of con entional desig over distan es of up to 10 m

at f rame rates of up to 5 kHz L n er ca le len th an hig er f rame rates may

b u ed, but with a ra idly in re sin req irement f or care in ca le selection an

p s ible receiver eq al zation, or the u e of active re e ters Provision is made in

this stan ard f or ada tin the b lan ed terminals to u e 7 Ω co xial ca le

Tran mis ion by fibre-o tic ca le is u der con ideration

DIGITAL AUDIO INTERFACE –

Part 4-4: Prof essional appl cations –

Physical and electrical parameters

This p rt of IEC 6 9 8 sp cif ies the ph sical an electrical p rameters f or dif f erent media

This p rt together with IEC 6 9 8-1, IEC 6 9 8-4-1, an IEC 6 9 8-4-2 sp cif y an interface

for the serial digital tran mis ion of two c an els of p riodical y sampled an l ne rly

re resented digital au io data from one tran miter to one receiver

The tran p rt format def i ed in IEC 6 9 8-1 is inten ed f or u e with s ielded twisted-p ir

ca le of con entional desig over distan es of up to 10 m without tran mis ion eq al zation

or an sp cial eq alzation at the receiver an at f rame rates of up to 5 kHz L n er ca le

len th an hig er f rame rates may b u ed, but with a ra idly in re sin req irement f or

care in ca le selection an p s ible receiver eq alzation or the u e of active re e ters, or

b th Provision is made in this stan ard f or ada tin the b lan ed terminals to u e 7 Ω

co xial ca le, an tran mis ion by f ibre-o tic ca le is u der con ideration This stan ard

do s not cover con ection to an common car ier eq ipment In this interf ace sp cif i ation,

an interf ace f or con umer u e is also mentioned The two interfaces are not identical

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

are in isp n a le for its a pl cation For dated ref eren es, only the edition cited a pl es For

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

amen ments) a pl es

IEC 6 2 8-12, So nd s stem e uipme t – P art 12: Ap li ation of c n e tors for bro dc st

a d simil r u e

IEC 6 6 3-7 (al p rts), Co n ctors for electro ic e uipme t – P art 7 : Detail s e ificatio for

8-wa , u s ield ed , fe a d fix ed c n e tors

IEC 6 9 8-1:2 0 , Digital a dio intera e – P art 1: Ge eral

IEC 6 9 8-1:2 0 /AMD1:2 14

IEC 6 9 8-4-1, Digital a d io intera e – P art 4-1: P rofe sio al a p c tio s – Audio c nte t

IEC 6 9 8-4-2, Digital a dio intera e – P art 4-2: P rofe sio al a p c tio s – Metadata a d

s b od e

IEC 61 6 -8, Rad io-fe u n y c n e tors – P art 8: Se tio al s e ific tio – RF c ax ial

c n e tors with in er diameter of o ter c nd uctor 6,5 mm (0,25 in) with b y n t loc –

Ch ra teristic imp d an e 50 Ω (ty e BN C)

ISO/IEC 1 8 1, I nformatio te hn log – Ge eric c b n for c stomer premis s

3 Terms a d de nitions

For the purp ses of this doc ment, the fol owin terms an def i ition a ply

unit interv l

UI

s ortest nominal time interval in the codin s heme

Note 1 to e try: Th re are 12 UIin a s mple fame Se An e A

Note 2 to e try: This n te a ple to th Fre c la g a e o ly

Note 1 to e try: This d f i itio e clu e th efe t of intrin ic jter

Note 2 to e try: Th ratio is e pre s din d cib ls

3.5

f rame rate

f req en y at whic frames are tran mit ed

Al interf aces s al b s bject to the common j ter req irements in ac ordan e with Clau e 5

Other p rameters s al comply with the tran mis ion typ sp cif ied

The interf ace s ould u e the b lan ed tran mis ion f ormat sp cif ied in An ex B The

interf ace may u e the f ormat sp cif ied in An ex C or one of the alternative tran mis ion

f ormats to b sp cif ied in a future edition (se An ex D)

5 Jit er

5.1 Output interf ac j t er

Jit er at the output of a device s al b me s red as the s m of the j t er intrin ic to the device

an jt er b in p s ed throu h from the timin ref eren e of the device

5.1.2 Intrinsic j t er

The p ak value of the intrin ic j ter at the output of the interface, me s red at al the

tran ition zero cros in s s al b les than 0,0 5 UI when me s red with the intrin ic-j t er

me s rement f ilter

• This j t er may b stron ly as mmetric an the deviation f rom the ide l timin s ould me t

the sp cif i ation in either direction

• This req irement a pl es b th when the eq ipment is loc ed to an ef fectively jt er fre

timin referen e, whic may b a mod lated digital au io sig al, an when the eq ipment

is fre - u nin

• The intrin ic-jt er me s rement-f ilter c aracteristic is s own in Fig re 1 It s ows a

minimum-phase hig -p s f ilter with 3 dB aten ation at 7 0 Hz, a f irst order rol -of f to

If j ter aten ation is provided an it is s c that the sin soidal jt er gain f als b low the j t er

tran fer f un tion mas of Fig re 2 then the eq ipment sp cif i ation s ould state that the

eq ipment j ter aten ation is within the sp cifi ation of this stan ard The mas imp ses no

ad itional l mit on low-freq en y j t er gain The l mit starts at the input-j ter f req en y of

Figure 2 – Jit er tra sfer-f unction mas

5.2 Re eiv r j t er tolera c

An interface data receiver s ould cor ectly decode an in omin data stre m with an

sin soidal j t er def i ed by the j t er toleran e template of Fig re 3

The template req ires a j ter toleran e of 0,2 UI p ak-to-p ak at hig f req en ies,

in re sin with the in erse of freq en y b low 8 kHz to level of f at 10 UI p ak-to-p ak b low

2 0 Hz

Fig re 3 – Jit er tolera c template

0,11

10

10

2 0 Hz

Tolera c(UI)

8 0 0 Hz

0,2 UI

Jiter fe u n y (Hz)

104

105

106

107

Annex A

(informative)

Symbol rates and UI

Deman s on the p rf orman e of the interf ace are determined by the frame rate, whic is in

turn determined by the au io sampl n f req en y AES5 recommen s a set of sampln

f req en ies ref er ed to a b sic rate of 4 kHz with o tion to u e 4 ,1 kHz or 3 kHz These

b sic rates may b s aled by certain multiples to ac ieve hig er or lower sampln

f req en ies

Ta le A.1 an Ta le A.2 i u trate how the s mb l rate at the interface, an the UI c an e

with dif ferent sampl n -f req en y multiples

Table A.1 – Symb l rate v rs s s mpl ng fre ue c

Sampln frequ nc (F

s)

Annex B

(normative)

Balanced transmission

B.1 General characteristics

B.1.1 Configuration

A circ it conf ormin to the general con g ration s own in Fig re B.1 may b u ed

NOT Th ele tric l p rameters of th intera e are b s d o th s d fin d in ITU-T Re omme d tio V.1

whic alow tra smis io of b la c d-v lta e digital sig als o er c ble u to a few h n re meters in le gth

Figure B.1 – Simpl f ie e ample of th conf iguration of the circ it (bala c d)

B.1.2 Equ l s tion

Eq alzation may b u ed at the receiver

There s al b no eq alzation b f ore tran mis ion

The f req en y ran e u ed to q alf y the interf ace electrical p rameters is de en ent on the

maximum data rate s p orted The up er f req en y is 12 times the maximum frame rate

(a out 6 MHz for 4 kHz)

B.1.3 Cable

The intercon ectin ca le s al b b lan ed with a nominal c aracteristic imp dan e of 1 0 Ω

at freq en ies from 10 kHz to 12 times the maximum frame rate

The ca le s al b one of the f olowin typ s:

• s ielded (s re ned) ca le;

• u s ielded (u s re ned) twisted p ir (UTP) stru tured wirin (Category 5 or b ter, se

ISO/IEC 1 8 1); se item e) b low

• s ielded (s re ned) twisted p ir (STP) stru tured wirin (se ISO/IEC 1 8 1)

The same ca le typ s al b u ed throu hout an sin le interface con ection, in lu in

a) Holdin closer toleran es f or the c aracteristic imp dan e of the ca le, an f or the drivin

an terminatin imp dan es, can in re se the ca le len th for rel a le tran mis ion an

f or hig er data rates

b) Closer toleran es for the b lan e of the drivin imp dan e, the terminatin imp dan e,

an for the ca le itself can red ce b th electromag etic s s e tibi ty an emis ion

c) Usin ca le havin lower los at hig er freq en ies can improve the rela i ty of

tran mis ion f or gre ter distan es an hig er data rates

d) Care s ould b taken con ernin the desig of the interface to provide adeq ate b lan e

on the twisted p ir within the Category 5 ca le Usin RJ4 con ectors, con entional y

wired, c r ent practice favours the u e of pin 4 an 5 for sig als u in this b lan ed

interf ace (se aratin them from ATM sig als on the same ca le, f or example) Pin 3 an

6 are the pref er ed secon p ir For f ul protection, the interface may have to with tan

p wer voltages sp cified to s p ort network eq ipment, an the u e of tran f ormers an

bloc in ca acitors on the b lan ed interface is stron ly recommen ed

e) The UT ca le has b en s own to of f er tran mis ion up to 4 0 m overal u eq al sed, or

8 0 m eq al sed, at 4 kHz frame rate (Se AES pre rint 3 8 )

B.2 Line driver chara teristics

B.2.1 Output impe a c

The l ne driver s al have a b lan ed output with an internal imp dan e of 1 0 Ω with a

toleran e of 2 %, at freq en ies from 0,1 MHz to 12 times the maximum frame rate when

me s red at the output terminals

B.2.2 Signal ampl tude

The sig al ampl tu e s al l e b twe n 2 V an 7 V p ak-to-p ak, when me s red acros a

1 0 Ω resistor con ected to the output terminals, without an intercon ectin ca le present

NOT A ty ic lv lu is 4 V ± 10 %

B.2.3 Bala c

An common-mode comp nent at the output terminals s al b more than 3 dB b low the

sig al at freq en ies f rom DC to 12 times the maximum frame rate when terminated in a

f lo tin lo d of 1 0 Ω

B.2.4 Ris a d f al time

The rise an f al times, determined b twe n the 10 % an 9 % ampltu e p ints, s al b

b twe n 0,0 UI an 0,18 UI when me s red acros a 1 0 Ω resistor con ected to the output

terminals, without an intercon ectin ca le present Care s ould b taken to me t local

reg lation regardin electromag etic comp tibi ty (EMC)

NOT 1 Th minimum a d ma imum ris a d fal time f or a fame rate of 4 kHz are 5 n a d 3 n re p ctiv ly

NOT 2 Op ratio toward th lower lmit of 5 n ma impro e th re eiv d-sig al e e p tern, b t ma in re s

ele troma n tic ra iatio at th tra smiter

B.3 Line re eiver characteristics

B.3.1 Terminating impe a c

The receiver s al present an es entialy resistive imp dan e of 1 0 Ω with a toleran e of

2 % to the intercon ectin ca le over the freq en y b n f rom 0,1 MHz to 12 times the

maximum frame rate when me s red acros the input terminals The a pl cation of more than

one receiver to an one l ne mig t cre te tran mis ion er ors d e to the res ltin imp dan e

mismatc

B.3.2 Ma imum input signals

The receiver s al cor ectly interpret the data when con ected directly to a l ne driver workin

b twe n the extreme voltage lmits sp cif ied in B.2.2

NOT In th first v rsio of AE 3

1

th ma imum p a to p a sig al ampltu e for a ln driv r wa s e ifie a

10 V

B.3.3 Minimum input sign ls

The receiver s al cor ectly sen e the data when a ran om input sig al prod ces the eye

diagram c aracterized by a V

V

min: 2 0 mV

Fig re B.2 – Ey dia ram, bala c d re eiv r

B.3.4 Re eiv r e ual zation

Eq alzation may b a pled in the receiver to ena le an intercon ectin ca le lon er than

10 m to b u ed A s g ested freq en y eq al zation c aracteristic for o eration at f rame

rates of 4 kHz is s own in Fig re B.3 The receiver s al me t the req irements sp cified in

Figure B.3 – Sugge te e ual zing c ara teristic

f or a re eiv r operating at 4 kHz f rame rate

The stan ard connector f or b th outputs an inputs s al b the circ lar latc in thre -pin

con ector des rib d in IEC 6 2 8-12 Note that this typ of con ector is u ual y cal ed XLR,

or XLR-3

An output con ector f i ed on an item of eq ipment s al u e male pin with a f emale s el

The cor esp n in ca le con ector s al th s have f emale pin with a male s el

An input con ector f i ed on an item of eq ipment s al u e f emale pin with a male s el The

cor esp n in ca le con ector s al th s have male pin with a f emale s el The pin u age

s al b :

Pin 1 Ca le s ield or sig al e rth;

Pin 2 Sig al;

Pin 3 Sig al

The c an el codin me n that the relative p larity of pin 2 an 3 is not imp rtant Se

IEC 6 9 8-1:2 0 , 4.2 However, it is recommen ed that relative p larity is preserved for

these sig al p th Se AES2

B.4.2 8-wa modular conne tor

Where Category 5 stru tured ca l n is u ed, the 8-way mod lar con ector sp cified in

IEC 6 6 3-7 (sometimes caled "RJ4 ") is req ired Whie the interface is by defi ition

in en itive to p larity, f or the purp ses of con tru tin ada tors, XLR pin 2 s ould b

con ected to RJ4 pin 5 (or other od -n mb red pin), XLR pin 3 s ould b con ected to RJ4

pin 4 (or other even-n mb red pin), con istent with u in one of the four twisted p irs

Eq ipment man facturers s ould cle rly la el digital au io inputs an outputs as s c ,

in lu in the terms digital au io input or digital au io output, as a pro riate

In s c cases where p nel sp ce is l mited an the f un tion of the con ector mig t b

confused with an analog sig al con ector, the a breviation DI or DO s ould b u ed to

desig ate digital au io inputs an outputs, resp ctively

Annex C

(normative)

Coaxial transmission

The p rameters set in this an ex a ply to circ its where b lan ed eq ipment is ada ted to

co xial ca le Other stan ard cal f or more strin ent f i ures where con entional vide

eq ipment is u ed for digital au io sig als (SMPTE ST 2 6:19 5) or les strin ent f i ures

where con umer eq ipment is con ected over s ort distan es u in s re ned au io ca le

(IEC 6 9 8-1) Tec niq es f or ada ters are des rib d in AES-2id

C.2 Line driver chara teristics

No eq al zation b f ore tran mis ion s al b p rmited

NOT Th s e if i atio for th ln driv r (als k own a a g n rator or tra smiter is totaly diff ere t fom th

b la c d interf ac ele tric l s e if i atio a d is b s d o u b la c d c a ial-c ble tra smis io c n iste t with

c n e tio al profe sio al a alo -vid o pra tic

C.2.2 Output impe a c

The l ne driver s al have an u b lan ed output circ it havin a source imp dan e of 7 Ω

an a return los b t er than 15 dB over the f req en y b n f rom 0,1 MHz to 12 × f rame rate

(6,0 MHz in the case of 4 kHz)

C.2.3 Signal c ara teristic

The output sig al c aracteristic s al b as s own in Fig re C.1 an Ta le C.1 when

me s red acros a resistor con ected to the output terminals The resistor s al have a value

of 7 Ω with a relative toleran e of ±1 %

Table C.1 – Output sig al c ara teristic

b) The output voltage is simi ar to typical analog vide sig als

c) L s DC of fset provides a b t er res lt f or lon tran mis ion

d) The minimum value of the rise an f al times is c osen to restrict the b n width of the

output sig al When this digital au io sig al is f ed to a con entional analog vide

distribution ampl fier (VDA), restrictin the b n width prevents u neces ary phase

distortion of the sig al cau ed by l mited b n width of the analog VDA Hig frame rates

imply hig vide b n width fre of phase distortion Op ration toward the lower l mit may

improve the received-sig al eye p t ern, but may in re se EMC at the tran miter Care

s ould b taken to me t local reg lation regardin EMC

e) The maximum value of the rise an fal times is c osen with con ideration given the

desira i ty of lon -distan e (1 0 0 m) tran mis ion

f ) Fig res in (brac ets) re resent time values where the frame rate is 4 kHz

C.3 Coaxial cable c aracteristics

The intercon ectin ca le s al b co xial an have a c aracteristic imp dan e of 7 Ω ± 3 Ω

over the freq en y b n f rom 0,1 MHz to 12 × frame rate (6,0 MHz in the case of 4 kHz)

Se AES-2id f or a dis u sion of desig prin iples The ca le s ould b wel s re ned

C.4 Line re eiver characteristics

Eq alzation may b u ed at the receiver

Note that the recovered sig al integrity is determined by the sig al con ition at the en of the

terminated ca le an the receiver c aracteristic Receiver c aracteristic s c as thres old

level, h steresis level, input sen itivity, an so on, de en on the a plcation The a pl cation

is defi ed in p rt by tran mis ion distan e, sp cifi ca le u ed, req ired noise margin, an

p rf orman e of the down tre m cloc - ecovery circ itry If the intention is to preserve the

integrity of the sig al u der variou circ mstan es s c that it b identical in al cases, then

the req irement for the o timum receiver wi dif f er in e c case Th s, this stan ard

esta ls es only the minimum req irements, rather than sp cif yin the c aracteristic of every

receiver

C.4.2 Terminating impe a c

The terminatin imp dan e s al b a resistive imp dan e, at the ca le con ector, of 7 Ω

with return los of 15 dB or more over the f req en y b n from 0,1 to 12 × frame rate

(6,0 MHz in the case of 4 kHz)

C.4.3 Ma imum input signals

The receiver s al cor ectly interpret the data when con ected directly to a l ne driver workin

b twe n the extreme voltage lmits sp cif ied in C.2.3

C.4.4 Minimum input sign ls

The receiver s al cor ectly interpret the data when a ran om sig al at the input con ector

prod ces the eye diagram c aracterized by a V

V

min: 3 0 mV

Figure C.2 – Ey dia ram, coa ial re eiv r

Note that this sp cif i ation is eq ivalent to the one for a minimum sig al at the terminated

BNC con ector at the receivin en of the co xial ca le It is writ en to maintain comp tibi ty

with existin eq ipment conformin to An ex B when a resistive p d or tran former

imp dan e-con erter, ada tin a BNC (7 Ω) con ector to the typ of XLR con ector

des rib d in An ex B (1 0 Ω), is u ed to con ect the u b lan ed co xial ca le to the

b lan ed interf ace input Se AES-2id f or examples

For tran mis ion b yon 1 0 0 m, exp riments have f ou d the neces ity to u e a receiver of

hig sen itivity that can rel a ly o erate with an input sig al eye diagram c aracterized by a

Fig re C.3 – Ey pat ern f or long-dista c tra smis ion

Bibl ography

IEC 6 9 8 (al p rts), Digital a dio intera e

IEC 6 9 8-3, Digital a dio intera e – P art 3: Co s mer a p c tio s

ITU-R Recommen ation BS.6 7, A d igital a d io intera e for bro dca ting studio

ITU-T Recommen ation V.1 , Ele tric l c ara teristic for b la c d d ou le-c re t

inter-c a g circ its o eratin at data sign llin rate u to 10 Mbit/s

AES3-4, AES stand ard for d igital a dio – Digital in uto tp t intera in – Serial

tra smis io format for two-c a n l line rly-re re e ted d igital a d io data – P art 4: P hy ic l

a d electric l , Au io En ine rin Society, New York, NY, USA

AES5, AES re omme ded pra tic for profe sio al digital a d io – P refered s mp n

fe u n ie for a p c tion employin p ls -c de modulatio , Au io En ine rin Society,

New York, NY, USA

AES10, AES Re omme ded P ra tic for Digital Aud io En ine rin – Serial Multi-c a n l

Audio Digital I ntera e (MADI ), Au io En ine rin Society, New York, NY, USA

AES2 , AES re omme ded pra tic for profe sio al a dio – Co s rv tio of th p larity of

a dio sig als, Au io En ine rin Society, New York, NY, USA

AES-2id, AES informatio do ume t for d igital a d io e gin erin – Guideli e for th u e of

the AES3 intera e, Au io En ine rin Society, New York, NY, USA

AES pre rint 3 8 , 9 th AES Con ention, Amsterdam, F bruary 19 4, Twisted-p ir c bles

for AES/EBU Digital Audio Sig als, D G Kirby, BBC R & DD, (later publ s ed in J Au io En

Soc Vol 4 , No 3, 19 5 Marc , p 13 -14 )

SMPTE ST 2 6:19 5, Tra smissio ofAES/EBU Digital Audio Sig als Ov r Co x ial Ca le,

Society of Motion Picture an Television en ine rs, White Plain , NY USA

SMPTE ST 2 7:2 0 , Serial Digital Fib r Tra smis io Sy tem for AN SI/SM P TE 259M

Sign ls, Society of Motion Picture an Television en ine rs, White Plain , NY USA

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