M457 — Pre-Mixer Module

5 - 101 AMPLIFIER SERIES The operation 0 f both amp]i fier sections is identica] one section Will be described _ OnTy Each section consists 0 f two individua] inverting amp] ifiers namely 21 and 22 These are fo]owed by their respective out- put stages Q1 through Q4 _ In the 5-101 the two amp] j fier inputs a re interconnected to provide cross coup]ed differentia] Pair resu]ting in ba ]anced 6 , 000 o hm input The output is actively ba Tanced _ The 5 -1014 is des i gned with the 22 section to be used as summing (mixing input The output 0 f this section at termina 1 E4 is externa ] Iy connected to E1 thus providing an unbalanced input and an actively ba ]anced output The 5 -101B presents a n unbalanced bridging input (15k ohms ) to the source As is the cas e with the 5 - 101A , the output at termina 1 E4 is externa]Ty connected to E1 and i5 actively ba ]anced R47 to R50 together with C15 and C16 Provide on-card power supply decoup] ing _ 5-101-1-2

WARD-BECK SYSTEMS LTD. PARIS LIST 5-101A DUAL BOOSTER AMPL IFIER PART DESCRIPTIOn MFG MFG PART NUMBER C1 C3 Es C6 C7 C8 C9 C 10 Capac itor 33 uF/ 10 150 uF /6 V De Tete Capac itor 6 . 8 PF Kemet 73900336MO 10AS T390E157M006aS Philips 2222-638-09688 220 uF /10 V Kemet T390F227M0 10AS 33 uF/10 V 150 uF/ 6 V T3900336M010AS T390E157M0064S De lete C1 1 C12 C]3 C]4 C15 Capacitor 6 . 8 PF Philips 2222-638-09688 220 uF/10 V Kemet T390F227M010AS 22 uF/25 V Siemens B41313-A5226-2 C16 CR ] CR2 CR3 CR4 CR5 Diode Itt 1N4148 CR6 CR7 CR8 Transistor Nationa 1 PN3569 PN3645 Pn366? PN356 9 8 4 5 86 6 Q8 PN3645 PN3569 PN3645 5-101A-2-1

WAAD-BECK SYSTEMS LTD PARTS LiST 5 - 10 1A DUAL BOOSTER AMPLIFIER PART DESCRIPTIon MFG MFG PART NUMBER RI R2 R3 R4 R5 Resistor XW 5 % 47K 47K Philips De lete R6 R7 R8 Rg R ] 0 Res i stor XW 5 % 620 620 18k 9K1 620 Philips RI1 R12 RI 3 RI4 R15 620 15K 15K 15K 15K R16 R17 R1 8 R19 R20 33 33 33 33 4K7 R21 R22 R23 R24 R25 4K7 33 33 47K 47K R26 R27 R28 R2 9 R30 De lete Res i stor 'W 5 % 620 620 R31 R32 R33 R34 R35 18K 9K1 620 620 15K 5 - 101A-2-2

WARD-BECK SYSTEMS LTD_ PARIS LISt 5 -101A DUAL BOOSTER AMPLIFIER PART DESCRIPTIon MFG MFG PART NUMBER R36 R37 R38 R3 9 R40 Resistor XW 5 % 15K 15k 15K 33 33 Phi]jps R41 R42 R43 R44 R45 33 33 4k7 4k7 33 R46 R47 R48 R49 RS0 33 JK Res istor YW 5 % 180 180 R5 1 R52 R5 3 R54 Resistor #w 5 % 18k De Tete Res istor aW 5 % 18K DeTete 21 22 23 24 Integrated Circuit Nationa] LM3O IAN WBS recommends the uS e of rep]acement parts made by the spec ified manu facturers for continued opt imum equipment performance 5-101A-2 -3

WBS M457 SENS iTivity control R2 , RL , R6 and Duter knobs 95Se5 acconoda constant LEVEL contro setiings SY ng input_ eve | 5 the SENS control StaBtevi [inuous Iy adjus Jeve ] cons tro range for each dividua channe for both mi crophone inputs SEN-€-MiX ASs /GNMENT swi tches Shi through Sw8 Khen depressed these tches the outputs [ne ted Channe to mixing buses and/or required; SEN-C-Mix IXER LEVEL controls ano (inne knobs) Fhe con- are used comb the nd vidua input channe the des red 'forn Propor ion the output Tgna SEN-C-MIX SEN-C-mix 10/77 ISSUE DATE REDRAWN REVISION Cpp WBS WARD-BECK SYSTEMS DRN PNAHSES ENG_ CKD. RlL APP Iit SCALE M457 4X2 PREMIXER MODULE

5-101 AMPLIFIER SERIES The operation 0 f both amp] ifier sections is identica] one section will be described, Only Each section consists 0 f two individua ] inverting amp] ifiers namely 21 and Z2 _ These are fo ]owed by their respective out- put stages Q1 through Q4 _ In the 5-101 the two amp]ifier inputs are interconnected to provide cross coup]ed differential pa ir resulting in balanced 6 ,000 o hm nput The output is actively balanced _ The 5-1014 is designed with the 22 section to be used as summing (mixing) input The output 0 f this section at termina] E4 is externa]Ty connected to E] thus providing an unba lanced input and an actively ba lanced output The 5-]01B presents an unbalanced bridging input (15k ohms ) to the source As is the case with the 5-101A , the output at termina ] E4 is externa]y connected to E1 and is actively ba ]anced R47 to R50 together with C15 and C16 provide on-card power supply decoup] ing .

:.:` s 6 '.> P030 a 3 a - ~ . ~'' ` ` 4 U 5-101-1-2

M457 4x2 PRE-MIXER Input Sensitivities: Line: Mic: -15 to +15 dBm (ref 600 ohms 60 to -30 dBm ref 150 ohms source): source (Sensitivity continuous Ty adjustab 1e over 30 dB range . ) Ga in: Line: Mic: 15 dB maximum (matched ga in) 60 dB maximum (transducer gain) _ Frequency Response: f1.0 dB from 30 Hz to 20 kHz (tailored ro]1-0 ff ) Noise: -122 dBm EIn at maximum SENSITIVity (20 Hz to 20 kHz ) Harmonic Distortion: Less than 0 , 5% THD from 50 Hz to 15 kHz at +18 dBm output. Input Levels : Line: a t maximum sensitivity: at minimum sensitivity -15 dBm nomina] +15 dBm nomina 1 +10 dBm maximum_ +30 dBm maximum_ Mic: a t maximum sensitivity: at minimum sensitivity: 60 dBm nomina 1 -35 dBm maximum. -30 dBm nomina ] -8 dBm maximum_ Input Impedances Line: Mic : 30 000 ohms 750 ohms Source Impedances : Line Mic: 150/600 ohms ba Tanced/unba ]anced_ 150 ohms ba anced/unba Tanced Output Leve1 : 10 dBm nomina ] +22 dBm max imum_ I -1

WAAD-BECK SYSTEMS LTD_

M457 4x2 PRE-MIXER Output Impedance : Less than 100 ohms Load Impedance: 60 0 ohms ba Tanced _ Phas ing : Input and output termina ] s des i gnated by numbers are in phase . Power Requirements : +25 vo ]ts dc , 50 ma_ Ambient Temperature: 0 to 60 degrees Ce]sius_ Dimensions 6 " wide X 7" high X 6 . 5 " deep 845 mm x 178 mm X 165 mm ) 1 -2

WAAD-BECK SYSTEMS LTD CIRCUIT DESCRIPTIOn M457 42 PRE-MIXER The M457 PRE-MIXER is intended to accept four separate micro- phone or Tine inputs and combine them 1n the desired proportion to produce a n output 5 igna 1 Two separate output buses are provided ('A and B ' ) . Each preamp]i fier can feed either one or both output buses as may be requi red Preamplifiers Four identica ] Preamp]ifiers are contained in the M457 To ilustrate preamp] i fier number consists 0 f Q1 Q2 , 21 and assocjated components _ R2 is continuous Ty variab]e SENSItIVIty contro] permitting 30 dB input Teve] variation in order to accommodate constant MIXER LEVEL contro] settings _ Thus the SENSITiVity contro 1 permits operation with microphone Teve] s from -60 to -30 dBm or ine Teve] s from -15 to +15 dBm . RI is the MIXER LEVEL contro] norma ] ly pos itioned with 10 dB "in hand" When the Tine input is to be used 150 ohm resistor is externa ]Iy connected across pins and A 0 f the edge connector The amp]i fier wil] then present bridging input 30k ohm) to the source External Summing Inputs 27/28 and 25/26 a ] ]ow for externa ] summing or comb ining inputs to be injected into the A and B mixing buses respectively _ These inputs are des igned to accept the outputs 0 f other M457 pre-mixers In this way , it is poss ib]e to form 8 X2 , 12X2 or Targer pre-mixer groups 5 -101A BOOSTER Amplifier The 5 - 101A DUAL BOOSTER AMPLIFIER mixes the four Preamp] i fier outputs as we] 1 a $ the outputs o f 25/26 a nd 27/28 Assignment switches SwI through Sw8 determine the routing 0 f the pre- amp]i fier outputs to either A and/or B mixing buses The 'A and B outputs 0 f the 5 - 101A appear at pins 17/U and 16 /T respectively The output Teve1 a t these points is -10 dBm nomina Tly. 2 -1

WARD-BECK SYSTEMS LTD CIRCUIT DESCRIPTIOn M457 4X2 PRE-MIXER Summing outputs for buses 'A a nd B are brought out at pins 14/R and 15/S Thes termina]s may be para ] Te 1ed with the 5 umming outputs 0 f other pre-mixers to form pre-mixer groups a $ explained ear]ier and may subsequently be fed to termina ] s 12/N and 11/M 0 f another pre-mixer the output 0 f which Will then produce the combined mix 0 f aj1 inputs_ Alternatively the para ]elTed s uMMing outputs may be used t0 feed an M457A MASTER MIXER or any other suitab]e s umming input within the cons0 ] e system Power Supply Decoupling C1 through C4 together with RI1 and R12 form passive on-board power suppIy decoup] ing circuit CRI and CR2 prevent modu ]e dama ge in the event 0 f accidenta] po Tarity reversa] 2 -2

WAAD-BECK SYSTEMS LTD_ APPLICATION EXAMPLES M457 PRE-MIXER WM 12IN 15/5 M 1 14/R 12 X2 PRE-MXER 12 1 11M N2H 5/5 M 1 14R 11/m 12IN 17U OUTPUt (-10 dBm) 1 16L1 B" OUTPUT (-10 dBm ) 8X2 PRE_MXER with MASTER output 11/M 12/n 15/5 M 5 14/R 6 F 8/J M OUtPut (+8 dBm) 1 11/M 12/N 15/5 2/8 40 ; B" OUTPUt (+8 dBm) M 5 14/R EXTERNAL INPUT 3-1

WAAD-BECK SYSTEMS LTD PARIS LIST M457 4X2 PRE- MIXER PART DESCRIPTIOn MFG MFG PART NUMBER Capacitor 22 uF/25 V Siemens B41313-45226-2 0 E6 C9 C10 C11 C12 C]3 C14 C15 100 uF/25 V Philips 426ETF]00 680 pF 2222-630-03681 47 pF uF/35 470 pF uF/ 35 V 68 pF 2222-638-70479 T390B105M0354S 2222-630-03471 T390B105M035AS 2222-638-70689 Kemet Philips Kemet Phi]ips 6 . 8 pF 10 uF/25 V 150 uF/ 6 V 2222-638-09688 T390C106M025AS T390E157m006as Kemet De lete Capac itor 680 pF Philips 2222-630-03681 C]6 C17 C18 C19 C20 47 pF uF/35 V 470 pF 1 uF/35 V 68 pF 2222-638-70479 T390B105M035AS 2222-630-03471 T390B105M035AS 2222-638-70689 Kemet Philips Kemet Phi]ips C21 C22 C23 C24 C25 6 8 pF 10 uF/25 150 uF / 6 V 2222-638-09688 T390C706M025AS T390E157M006A$ Kemet De lete Capac itor 680 pF Phi]ips 2222-630-03681 C26 C27 C28 C2g C30 47 pF uF/ 35 V 470 pF 1 uF/35 V 6 8 p F 2222-638-70479 T390B105M035AS 2222-630-03471 T390B105M03545 2222-638-70689 Kemet Phi]ips Kemet Philips C31 C32 C33 C34 C35 6 . 8 pF 10 uF/25 V 150 uF / 6 V 2222-638-09688 7390c106m025as T390E157M006AS Kemet De Tete Capac itor 6 80 pF Philips 2222-630-03 681 4-1

WAAD-BECK SYSTEMS LTD_ PARTS LiSt M457 4X2 PRE-MIXER PART

M457 4x2 PRE-MIXER Input Sensitivities: . a, { Line: ` -15 to +15 dBm (ref _ 600 ohms Mic: -60 to -30 dBm (ref 150 ohms source}: 2 W ~~. (Sensitivity continuous Iy adjustab ]e 2 ~: <. ' . ` oVer 30 dB range . ) Gain: :3 Line: Mic: 15 dB maximum (matched gain) -. " 60 dB maximum (transducer gain) _ ^ +1.0 dB from 30 Hz to 20 kHz (tailored ro]]-off) Frequency Response: Noise: -122 dBm EIn at maximum SENSITIVIty (20 Hz to 20 kHz) Harmonic Distortion Less than 0 .

5 % THD from 50 Hz to 15 kHz at +18 dBm output_ Input Levels: Line: at maximum sensitivity: at minimum sensitivity: -15 dBm nomina] +10 dBm maximum_ +15 dBm nomina 1 +30 dBm maximum_ Mic: at maximum sensitivity: at minimum sensitivity: -60 dBm nomina ] -35 dBm maximum_ -30 dBm nomina ] -8 dBm maximum. Input Impedances Line: Mic: 30 , 00 0 ohms _ 750 ohms Source Impedances : Line : Mic: 150/600 ohms ba Ianced/unbalanced _ 150 ohms ba anced/unba lanced Output Leve1 -10 dBm nomina] +22 dBm maximum.

1-1

M457 4X2 PRE-MIXER The M457 PRE-MIXER is intended to accept four separate micro- phone or ine inputs and combine them in the desired proportion to produce an output s igna ] Two separate output buses are provided ('A and B' ) . Each preamplifier can feed either one or both output buses as may be required Preamplifiers Four identica] preamp]ifiers are contained in the M457 To iTlustrate preamp]ifier number cons ists 0 f Q1 Q2 21 and associated components .

R2 is continuous ly variabje SENSITivity contro] permitting 30 dB input Ieve 1 variation in order to accommodate constant MIXER LEVEL contro] settings_ Thus the SENSITIVIty contro] permits operation with microphone jeveis from 60 to 30 dBm or Tine Teve]s from -15 to +15 dBm . RI is the MIXER LEVEL contro] normally positioned with 10 dB in hand" When the Tine input is to be used 150 ohm resistor is externa ]ly connected across pins and 0 f the edge connector The amp]ifier wi 11 then present bridging input (30k ohm) to the source External Summing Inputs 27/28 and 25/26 a ] ow for externa] summing or combining inputs to be injected into the A and B mixing buses respectively These inputs are designed to accept the outputs 0 f other M457 pre-mixers In this way it is possib ]e t0 form 8X2 , 12X2 or Targer pre-mixer groups 5_l0JABOOSTER Amplifier The 5 -101A DUAL BOOSTER AMPLIFIER mixes the four preamp]i fier outputs as we11 a$ the outputs 0 f 25/26 and 27/z8 Assignment switches SWI through SW8 determine the routing 0 f the pre- amp]ifier outputs to either A and/or B mixing buses The A and B ' outputs 0 f the 5-101a appear at pins 17/U and 16 /T respectively .

The output Tevel at these points is -10 dBm nomina Iy 2-1

M457 4X2 PRE-MIXER PART DESCRIPTIon MFG MFG PART NUMBER R10 R1I R12 R13 R14 De lete Res istor AW 5 % 390 390 Delete Philips R15 R16 R17 R1 8 RI9 Resistor Sw 5 % 15K 15K 39 K 15K 100 Philips R20 R21 R22 R23 R2 4 39K 15K 1K 220 47k R25 R2 6 R27 R2 8 R2g 1K 620 10k 2k2 15K R30 R31 R32 R33 R34 15k Delete R35 R36 R37 R38 R39 Resistor YW 5 % 15K 15K 39 K 15K 100 R40 R41 R42 R43 R44 39 K 15K 1K 220 47K 4-3

WAAD-BECK SYSTEMS LTD, PARIS LIST M457 4X2 PRE-MIXER PART DESCRiPTIOn MFG MFG PART NUMBER R45 R46 R47 R48 R49 Res istor YW 5 % IK 620 10k 2K2 15K Phi]ips R50 R5 1 R52 R5 3 R54 15K De lete R55 R56 R57 R58 R59 Resistor GW 5 % 15k 15K 39 K 15K 100 Philips R60 R61 R62 R63 R6 4 39 K 15K 1K 220 47K R65 R6 6 R67 R68 R6 9 1K 620 10k 2k2 15k R70 R7I R72 R73 R74 15K De ete R75 R76 R77 R78 R79 Res istor 4w 5 % 15K 15K 39 K 15K 100 Philips

WAAD-BECK SYSTEMS LTD PARTS LISt M457 4X2 PRE-MIXER PART

M457 4X2 PRE-MIXER PART DESCRIPTIon MFG MFG PART NUMBER SW4 SW5 Sw6 Sw7 Sw8 Switch Schadow WBS 11-005 2 22 23 24 25 Integrated Circuit Nationa 1 LM2OIAN 26 27 28 Transformer WBS 13280 TZ T T3 T4 WBS recommends the us e 0 f replacement parts ma de by the specified manufacturers for continued opti mum equipment performance 4 -6

WAAD-BECK BySTeMS LTD_ PARTS LiST M457 4x2 PRE-MIXER MODULE CONTROL KNOBS _ CAPS AND BUTTONS USED ON DESCR PTION MFG MFG PART NUMBER R1 R3 R5 R7 ) Knob Knob Cap Black Black Black) E Ima 021-352 021-122 040-102 R2 R4 R6 R8 Knob Knob Cap (Black ) Black Black 021-352 021-122 040-102 SW1 To Sw8 Button (White) Schadow FM-WH 4-7

WAAD-BECK SYSTeMs LTD DESCRIPTIOn 5-101 AMPLIFIER SERIES The 5-101 s eries of amp]ifiers are utilized a5 plug- in units within certain Wa rd-Beck Systems 400 s eries modu les There are two separate amp]ifiers per card each providing an actively ba ]anced output with maximum capability 0 f +25 dBm _ The fo] ]owing specifications apply to the 5-101 amp]ifiers _ UNIT InPUt GAIN MAX outPuT 5-101 5 - 101A 5 - 101B Ba Tanced Unba ]anced ( s umming ) Unba Ianced 15 dB Unity 20 dB +25 dBm +25 d Bm +25 dBm Frequency Response : +0.25 dB from 30 Hz t0 20 kHz Noise: -100 dBm from 20 Hz to 20 kHz . Harmonic Distortion: Less than 0 . 35% THD from 20 Hz to 20 kHz at +24 dBm output output Impedance: Less than 100 ohms Load Impedance: 600 ohms minimum_ Power Requirements: +24 Vo ]ts dc , 20 mA quiescent current 80 mA at +25 dBm output into 600 o hm oad Ambient Temperature: to 60 degrees Celsius . Dimensions 3.375 " 4.125" X 0 . 57" (86 mm X 105 mm X 15` mm) . 5-101-1-1

WAAD-BECK SYSTEMS LTD_

M457 4X2 PRE-MIXER PART DESCRIPIION MFG MFG PART NUMBER c1 C2 C3 C4 C5 L Capacitor 22 uF/25 Siemens B41313-45226-2 100 uF/25 Philips 426ETF]00 :` 220 pF 2222-630-03221 C6 , C7 ; . c8 C9 C10 47 pF uF/35 470pF 1 uF/35 68 pF 2222-638-70479 T390B105M035aS 2222-630-03471 T390B105M0354S 2222-638-70689 Kemet Philips Kemet Philips C11 6 . 8 pF C12 ; 10 uF/25 V C13 150 uF/ 6 C14 Delete C15 Capacitor 220 pF 2222-638-09688 T390c106m025aS T390E157M006aS Kemet Philips 2222-630-03221 C]6 47 pF C17 uF/35 C18 470 pF C19 uF/35 C20 68 pF 3 , 3 ~ C21 6 .

8 pF C22 10 uF/25 C23 150 uF / 6 C24 Delete C25 Capacitor 220 pF 2222-638-70479 T390B105M035aS 2222-630-03471 T390B105M035AS 2222-638-70689 Kemet Philips Kemet Philips 2222-638-09688 T390C106M0254S T390E157MOO6AS Kemet Philips 2222-630-03221 C26 C27 C28 C29 C30 47 pF ~uF/35 470 pF 1 uF/35 68 pF 2222-638-70479 T390B105M035AS 2222-630-03471 T390B105M035AS 2222-638-70689 Kemet Philips Kemet Philips C31 C32 C33 C34 C35 6 .

8 pF 10 uF/25 V 150 uF/ 6 2222-638-09688 T390C106m025a5 T390E157M006AS Kemet De lete Capacitor 220 pF Philips 2222-630-03221 4-1

5-101A DUAL BOOSTER AMPLIFIER PART DESCRIPTIOn MFG MFG PART NUMBER '^ .` 4 ` RI 3 { Resistor AW 5 % 47K R2 ,` 47K R3 Delete R4 RS Philips 3 e R6 Resistor SW 5 % 620 R7 620 R8 18K R9 "n 9K1 RI0 620 Philips ~ ;; ;. R1T - R12 R13 R14 R15 620 15K 15K 15k 15K ~e ; ;a ~ > R16 R17 R18 R19 R20 33 33 33 33 4K7 ~. ~u:C 7 3` 4 R21 R22 R23 R24 R25 4K7 33 33 47K 47K 76 X R26 R27 R28 R2g R30 Delete

"J8'~:[ ' ' U Resistor XW 5 % 620 620 R31 R32 R33 R34 R35 18K 9K1 620 620 15K 5-101A-2 -2