M612A

SA14-065 AUD/0 AMPL IFIER_ASSEMBLX Power_Supely The power supply , integral the 5A14-065 assembly derives its Jc voltage appearing pins and 22 the assembly connector) from the externa power transformer T201 mounted the chassis the M6124 . Bridge rectifier CRS along with C31 and C32 rectifies and filters the ac voltage providing nominal +/-32 volt output These voltages drive the power output stage the 5A14-065 directly wel| as appearing connector pins 15 and for the purpose powering the external SA8-117 Indicator Driver Assembly The +/-32 volt voltages are further decoupled and filtered by 011 through 014 and C33 through C36 This provides +/-21 volt dc regulated supply voltages operate the integrated circuit amplifiers the 5A14-065 amplifier ssembly

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5A14-065 1-2

MFG MFG PART NUMBER UI , u2,43 U4,u5 Pin Dip Socket AMP 640463-3 04 05,09, 010 Heat Sink WBS A605-03-020 Heat Sink Standoffs WBS A605-03-022 WBS recommends the use replacement parts made by the specified manufacturers for continued optimum equipmen performance_ 5A14-065 2-4

MFG MFG PART NUMBER R2o1 R202/ R203 Gain and Trim Con trol Knobs (Optiona Elma 021-1220 Black Caps (Optional ) 040-1620 WBS recommends tne use replacemen parts made by the specified manufacturers for continued imum equipmen performance

M612A AUDIO DIS TR IBUTI ON AMP LI F IER

+40 dB to -6 dB c o n tinuou sly v ariable wi lh a +/-3 dB trim (Bridgin g Gain) .

Frequ ency Re sponse: +/ - 0. 2 dB 20 Hz to 20 kHz .

a t 4 0 d B ga in:

at un ity g ain : Gr e a t e r t han 90 d B below +8 dB m (me a s ured ov e r a 20 Hz to 20 k Hz bw).

Harmonic Di s torti on : Le s s th a n 0.2% THO from 20 Hz to 20 k Hz up to +24 dBm output level w it h 12 output s s im u l l a n eo u s l y driv en .

Inpu t Lev el : -32 d Bm -t o +14 dBm nomina l for +8 dBm outpul, +2 4 dBm maximum a t unilY ga in .

Inp u t I mp e d a n c e : J O, OOO ohms or g re a ler, bal anced.

Sourc e Imp ed anc e : 600 o h ms or le s s, b a la nced o r unbal anced .

Com mo n Mo d e Reject ion Rat i o : Gr e a t e r th an 65 dB.

Common Mod e Vo lt ag e : 70V p e ak ma ximu m.

Outpu t Lev e l: +8 d Bm nominal, +2 4 dBm maxim um a t " a ch ou tp ut , 12 o utputs ma ximum .

Out pu l Impeda nce: 600 oh"'s r"" is li v,, 11.\ e eeb out pu t, activ"el y b a la n c e d.

Lo a d Imp e d a n c e: 60 0 ohms ba lanced for e a c h o utp ut. a .c

OUlpu t ' sol a l io n: 6 0 dB or gr"a ter. ps BS

Phasing : Th e lo w l e r min a l numb er o f t h e in p ul pa ll' and t h e lo w t " r m l n a l numb"r of W

Ihe ou tpu t pair a r e in p h a s ". :// tp ht

WAR D - BECK S Y STE M S L TD.

TECHN IC AL DA TA

M612A AUDIO D ISTRIBUT IO N AMPLIF IER

P a we r Requiremen t: 115V AC +/ _ 1~ , 50/ 60 Hz , 25 VA.

Ambie n t Tem pe r at ur. : o IQ 60 d~ gr _ s C .. lsiu s .

Dlmen . lon.: 3 .4" " wi d .. x 3.4" h i g h " 13. 7 " deep ( 86 mm " 86 mm " 348 mm)

We i g h t : Si b s ( 2 . 25 Kg) n .. l.

a .c ps BS W :// tp ht

WAFI O - B E C I< S YS TEMS L T D .

~ M6 12,t, AUDIO D IST R I BUTI ON AMPL IF IE R

The M6 12,t, Au di o DIS lr lbul lan Amp l ifi e r is an ec po ...ered madul a r p lu g _ In u n il d e signed 10 b ri d g e a cral's a s i n gl " aud i o $OUre " . It p ro vides a multip le of mutual l y Isol a te d aulpu lS at a s ta nd a r d +8 dBm 600 ohm l e vel for d I str ibu t ion Ihrough an au d io s yS l em .

The a cti vely ba lanced i n pu t prov id e s a high impeda nce br idgin g loa d to tne soure" a s ...,,11 as pro v idin g a high rejec llon 10 common mod e vol l ages . Th i s a l ia ..., for r-euee te s ys l em OPeration to be ach l"ved ... i t hou t the inclu , lon of tr an s fo rmers , e ven t ho u g h large a c po t en l lal e nteer eece s ma y "" ist be t wee n varI ous pa rt s of a n aud io s y s l etIl . T h e a bsence o f conv ent ion al a u di o t r a n s fo r me r s and au tpu l cauplin g ca pac i tor s re su l l s i n e "ce p tl o n al ly h i g h pe r formance c be r-e c r- e -taucs . Th " s e lf-p o...e -e d re etuee Ins u r e s i n d i v i d u al mo d ule r el1_ abl l il y an d t h " fr eedom f ro m th e d e p e nd enc y of man y a mp l i f ie r s u pon a s In g le c en t r alized p o w"r s u p p l y .

A fr o nt p an e l con tr o l permi t s e: +40 dB to - 6 dB co n t i n u o us l y va r ia b le gai n a d j u s tmen t to b e made . An a d di tiona l t r i m con trol a l lo ws a fur l he r fi n e g ain adjustmen t of +/-3 d B . Su ff ic ie n t gai n 15 provi de d t o br i dg e a - 30 dam au di o SOUrc e wllh a l l 12 ou tp u ts o pera t ing a t +8 d am p o...e r- le vel. .

Th e t ...e tve 600 ohm ac t iv ely balanced out pu ts are a v a i l a b le d irec tly a l t ne mo d ul" con nec tor.s. Ea c h ou t p u t i s ca pable of dell v "ring II. ma " lmu m of + 24 dam into a 600 oh m load . An Iso lation o f a t lea s l 60 de bet...Hn al l au tPU IS Is p r o v id e d . Th e int e rna l r e s is ti ve sp il lter n et ork s mounted d i .. ecll y on I..... modu le c on n ec t or s e l iminate t ime con ml ng extern al ... irlng . All connection s are made di rec ll y to t ..... MF6 f rame recept acles .

T hree front pane l L EO In d ic a t ors prov id" a

M612A AUDIO DISTRIBUTION AMPL IFIER Gain: +40 dB dB continuously variable with +/-3 dB trim (Bridging Gain) .

Frequency Response: +/- 0.2 dB Hz 20 kHz

Noise:

40 dB gain: unity gain: Greater than dB below dBm . 4' dBm 20 kHz bw ) Greater than dB below (measured over 20 Hz Harmonic Distortion: Less than 0 . 2% THD from 20 Hz 20 kHz up +24 dBm output level with 12 outputs simultaneously driven . Input Level dBm +14 dBm nominal for dBm output, +24 dBm maximum at unity gain. Input Impedance: 30 , 0oo ohms greater balanced Source Impedance: 600 ohms less, balanced unbalanced Common Mode Rejection Ratio: Greater than 65 dB . Common Mode Voltage: 70v peak maximum. Output Level dBm nominal +24 dBm maximum at each output, 12 outputs maximum. Output Impedance: 600 ohms resistive actively balanced each output, Load Impedance: 600 ohms balanced for each output _ Output Isolation: dB or greater_ Phasing: The low terminal number the input pair and the low terminal number the output pair are phase

M612A AUDIO DISTRIBUTION AMPL IFJER Power Requirement: T15V Ac +/-107 , 50/60 Hz, 25VA _ Ambient Temperature: degrees Celsius Dimensions: 3.4" wide 3.4"1 high 13.711 deep (86 mm mm 348 mmy Weight: Ibs (2.25 Kg) net . . . ` . . . . .

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M612A AUDI0 DISTRIBUTION AMPLIEIER The M612A plugs directly into the WBS MF6 series mounting frame, which may be installed standard EIA inch equipment rack The MF6 frame wiii accommodate maximum five M612A distribut- ion amplifiers any combination single multiple width modules not exceeding ten single width units. The vertical rack space required two rack units (3-1/2 inches) the mounting frame has been procured without receptacles, these must pe installed the ppropriate module positions_ Each M612A module requires two type MFR6 receptacles .

Note that the receptacle containing the ac line voltage input inverted provide the mechanical polarization necessary prevent inadvertent' insertion other companion modules which not operate from the ac power Iine Where vertical rack space permits and the ultimate noise and crosstalk performance desired recommended that only modules the same type be allocated each individual mounting frame_ Alternatively _ possible mix modules different types by exercising extreme care separate cables carrying different levels and functions_ Place all ac-powered units the right the frame as viewed from the front.

Install insulating rubber sleeves over all ac soldered terminal connections For refer external connections drawing 612-02-003 including shield and ground wiring, To obtain optimum resuits use insulated, shielded, twisted pairs for both input and output wiring Cables operating with level differ_ ences exceeding 25 dB should be laced separately and dressed apart from each other Keep power wiring away from low level circuits Ground cable shields one end only Ground loops must avoided generally ecommended as good engineering practice that one rack unit space be provided between full frames distribution amplifiers for optimum ventilation Consultation with the factory ecommended for applications where greater packaging density may be required deemed necessary

M612 A AUDIO DISTR IBUT ION AMPLIFIER

Bus s MOL 1/ 4

Connector , 22 Pin Fem ale

p, pt COO?,e ctor , 16 Pi~ Mal e

Audio Amp lifi e r Assembly 5A 14-065 Indica tor Dr iver Assem bl y 5A8-117 Outpu t Sp iiller Network As s embl ie s (4)

R201 Pot entiometer 5K :~g~/

MISCELLANEOUS COMP ONENTS

R201 Gain a n d Trim ContN) 1 R20 2/ Kn o b s (Option al) R203 Black Cap s ( Opt io n a l ) a .c ps BS W

WBS recommends th e us e of replaceme n t pa r ts mad e by t h e sp ecified manufacturers fo r c on t i n u e d op timum equi pment p erformanc e . :// tp ht

WAR D-BECK S Y S TEMS L TO.

P I AND P2 CONNECTOR LAYOUTS

M6 12A AUDIO D IS TRI BU T IO N AMPLIF IER

CHASSIS

'----=- +-.,J.I- OUTPUT "' 0

AMPLI FIER ELECTRICAL GROUND RETURN TO a .c

INSULATED GROUND BUS ps BS W :// tp ht

I (-9d B) I (-6d B) I I ( - 6dB )

I (-6d B)

I TR IM ( - 6d B)

I ~T

tr +/- : ;B ( - 6d B) IN PU T ( RE -32 d Bm TO +14 dBm ~ Iv 30K o h ms. (-6d B)

('] 9' GAIN +4 0/ -6 dB ( - 6d B ) I I I I ~ I ( - 6d B )

( - 6 d B)

( - 6d B )

PROGR AM DETE CTORS ( -6d B) .1/ >-- - - --1 ~ OVERLOAD REF

~ ;>-----~ ~ NORMAL RE F - -- ----I a .c ps

115V AC ( BS

50 /60 Hz

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-l / (-9dB) I, "- 2 ( - 6d B) I , "- 3 ( - 6 d B) I , "- 4 (-6;;B ) I ·5 ( - 6d B ) I 6 ( - 6 d B) "-

v v I, 7 OUTP UTS +8 d Bm 600 oh ms (-6 d B) I 8 (-6d B ) t 9 / ( - 6 d B)

-,-- I 10 ( - 6d B)