M453A — Cue Amplifier

MFG MFG PART NUMBER R26 Knob Cap (Black) (Black) Elma 021-3520 040-3620 Swi Button (White) Schadow FG-Wh WBS recormends the use of replacement parts made by the specified manufacturers for continued optimum equipment performancc 3-4

WBS M4534 Huting Switch Ski: Vhen depressed, mutes Ehe speaker auteut c and ope: rates assoc iated DSI - LEVEL coeve?/ 0f26 : leve Sorfrer: output aP MUTE CUE IssU DATE RLYISIH WBS WAAD-BECK BySTeMS DrNPEcety ERG Ll CKD App I PSCALE M4534 CUE AMpLifIER

MFG MFG PART NUMBER R26 Knob Cap (Black) (Black) Elma 021-3520 040-3620 Swi Button (White) Schadow FG-WH WBS recorimiends the use replacement parts made by the specified manufacturers for continued optiMuM equipment performancc

M453A CUE AMPL IFI ER

Gai n: To Li ne Ou t put: 18 dB !2 ae . To Sp e a ~ e r Out put : 35 dB ! 2 dB.

Fre quency Response: ! 1 dB f rom SO Hz to 10 kHz .

Noi se : 7S dB below 3 wat t s or +I B dBm output ( 20 Hz to 20 kHz ).

Ha r mo nic Dis to r t io n : Les s than 0.5 ~ from 100 Hz t o 5 kHz at 3 watts or T1 8 dBm out put .

Source I mpedances : Slimmi ng Input: 30. 000 ohms . bala nce d. per sourc e . All oth er I nputs : 600 ohms or les s . bala nced.

Input I mpe dances: Summ i ng In put: Les s th an 5 ohms. All ot he r Inputs: 30.000 ohms.

I nput Le vel s : Summing In put : o dBm via 30 k ohm summ ing networ ~. Al l ot he r Inputs : o dB m nom i na l. tI 8 dBm maxi mum .

Outp ut Imp edan ces : Li ne : 150 ohms. ba lanced . Speaker: Le s s t han 0 . 5 ohm. ca p s. BS W :// tp ht

1- 1

W A t=l O- B E C K SYSTEMS LT O .

TE CHNICA L DATA "4 53-' CUE A"Pl IF IER

loa d t e pede nces : line : 600 ohms , balan ce d. Speaker: 8 ohms , balanced /un balan ce d.

Output leve ls : U ne: +8 dBm nOll l na 1 . +18 dB~ ~ a x i ..u•• Speaker : 300 mi l l i wa t t s nomina l, 3 wa tt s max1. um unde r normal pr ogra. condit ions.

Powe r Requ i rement s: +25 yolts dc , 35 .A i dli ng . 325 aA a t full powe r ou tput .

A~bl e n t T e ~ p erature: o t o 60 de grees Cels i us .

n f eens to ns : 1. 6" wide x 7" hf gh x 6 .5" dee p ( 41 mm x 178 11m x 165 mill ) .

a .c ps BS W :// tp ht

1- 2

WARD -seCK S YSTEMS LTD.

CIRCU IT DESCRI PTION H4 53A CUE AM PLI FI ER

Th e M453A is I cu e ee pl t t t e r with l 3- Wl tt ou tpu t clp lbt l t t y. Pro.ision is . lde t o conn ect the l . pl i f i er ou tp ut to th e sp el ter e i t her di r ec t ly o r .i l i n i nte grll Mu t in g rel lY . I n lddi tion t o t he Spel ter output, I bll inte d, +8 d8. line out put 15 .'de I.aillbl e .

I nputs Three types of inputs a r e pre v t ded: a) SUI,,,..ing I nput: Desi gned to ope r a te f r om the cu e Mixin g bus of an audi o co nsole. b) Dir ec t In put: De s i gned t o wor k fr om an ex te r nal 600 ohm lu di o s our ce. c) Swi tc hed In put s : Two addition a l i nput s ar e provid ed , enteri ng th e module vi a soli d st a te cros s poin t switch es Z3 an d Z4. These i nputs may be uti l ize d f or i nte rcom re qui r emen ts, suc h as fr om i nnou nce boo t h or news r oom fac il it i e s . Pre ampl i fie r in d In s er t II wit h 1ts l s s oci i t ed co~p onen ts COMpri s e s the prel.pllfie r s ectton. CIO co upl es the pre amp output to t he fr ont pinel le.e l con trol R26. FrOM R26. the slgnl l i s fed t o Mod ul e co nnec t or p l n 7 , wh i ch 15 no r ma l ly s t r appe d t o pln 8 . Re MoYll of t hI s conn ection pe rMits i nse r t io n of in externa l leve l con tro l lOCi ted i t lnot he r ope r . t l ng .rea of th e co nso l e. Out put AMplif ie r Fro. pin 8 of the modu le conne ctor, the s ig nal is coup led to th e out put aMpli f ier se ct t on via Cll , R29 .nd R30. R29 Ml 1 be j UMpe r ed by Jl to i nc r e .s e ove r a l l aMpl if ier gain by 10 dB . The outp ut aMpl i f i e r co ns1sts of I2 wi t h i t s asso ciated compon ents. An act i ve l y ba lance d l i ne output is brou gh t out a .c

It module co nnector pins 14/R .fter passin g th rough CI9 , C20, ps

R41 In

M453A CUE AMPLIFIER Gain: To Line Output: To Speaker Output: 18 dB +2 dB _ 35 dB +2 dB Frequency Response : t1 dB from 50 Hz to 10 kHz_ Noise: 75 dB be ]ow watts or +18 dBm output (20 Hz to 20 kHz) _ Harmonic Distortion: Less than 0 . 5% from 100 Hz to 5 kHz at 3 watts or +18 dBm output_ Source Impedances Summing Input: A11 other Inputs : 30 , 000 ohms ba lanced, per source 600 ohms or Tess ba lanced Input Impedances : Summing Input: A11 other Inputs Less than 5 ohms 30 , 000 ohms Input Levels: Summing Input: A11 other Inputs : dBm via 30k ohm s umming network _ dBm nominal +18 dBm maximum.

Output Impedances Line: Speaker: 150 ohms ba lanced _ Less than 0 . 5 ohm_ 1-1

M453A CUE AMPLIFIER Load Impedances : Line: Speaker: 600 ohms ba lanced_ 8 ohms ba lanced/unbalanced _ Output Levels : Line: Speaker: +8 dBm nomina ] . +18 dBm maximum. 300 milliwatts nomina ] 3 watts maximum under norma 1 program conditions Power Requirements : +25 voTts dc 35 ma idling 325 MA at full power output Ambient Temperature: 0 to 60 degrees Celsius Dimensions 1.6" wide x 7"high 6 .

5 " deep (41 mm X 178 Mm X 165 mm) _ 1-2

M4534 CUE AMPLIFIER The 3-watt speaker output is derived from the Tower ha ] f 0 f 22 Coup led through C21 the s igna ] appears at the DIRECT output at Pin S Alternatively when muting 0 f the cue speaker is required, the SWITCHED output at pin 15 should be connected to the cue speaker The common return for the cue speaker appears at pins 16 8 T Muting The muting relay K1 is norma IIy energized Connecting the mute contro] input at pin X to CONTROL COMMON wil1 switch 0 ff Q3 , causing K1 to de-energize in turn disconnecting the output s igna] to pin 15 _ Muting can a ]s0 be achieved by operating SW1, ocated at the front pane] 0 f the modu le The LED DS 1 will be iluminated to indicate muted status Input_Crosspoints 23 and 24 are cmos ana 10g Swi tches serving a$ s0]id state crosspoints for inputs #2 and #3 _ These inputs are used for intercom app]ications and are switched from their respective remote ocations Both switches are norma]ly 0FF Connecting the contro] inputs at pins 17 or U to CONTROL COMMON Will switch the corresponding crosspoint on _ Power_Supply_Decoupling The M453A is designed to operate from sing]e 25 Vo]t regulated supply Fuse F1 is integra] to the modu ]e and Wil1 open j f power dissipation becomes excessive CRS protects the amp ]ifier from inadvertent supply vo ]tage reversa ] Additiona] filtering is provided by C7 2-2

WARD-BECK SYSTEMS LTD,

C H I NR A D I O

Rl4OORADIOCONSOLE

R E PLACEABLE

1,

WARD-BECK SYSTEMS LTD.

C H I NR A D I O

REPLACEABLE PARTSLIST

\'

WARD-BECK SYSTEMS LTD.

C H I NM D I O

R E PLACEABLE

:,

WARD-BECK SYSTEMS LTD.

C H I NR A D I O

R 14OO RADIO CONSOLE LIST OF SEPAMTELY SUPPLiEDSTANDARD PRODUCT MANUALS

8) t'1497 A Master Module

WARD-BECK SYSTEMS LTD.

C H I NR A D I O

DRAWIN L IGS T

Also: parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices) · parts boilerplate (5 devices)