M463K — Submaster Module

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M463K SUBMASTER_MODULE The M463K combination SUBMASTER/EQUALIZER module, designed accept combined mixed feeds from previously assigned mixing channel inputs may be required tne unit processes the mixed signal equalizes and routes the appropriate points within the console system. Input and Summing Amplifier The signal orignating irom the external mixing network applied the edge connector P1 , pins and and subsequently connects the summing current nodes the 4-141 summing amplifier_ facilitate module testing, direct input provided on P1 , Pins and EQUALIZER Section The ouiput the 4-141 summing amplifier routed one the normally closed contacts the EQUALIZER INSERT switch SW13 allow bypassing the equalizer _ Additionally, the 4-141 output fed 21, the first four cascaded summing amp lifiers through 24.

through 24 serve as mixing and isolation amplifiers They are used mix the primary input signal with correction signal derived from the outputs the 4-126 filter networks resu Iting raising lowering the level selected portions the audio spectrum Additionally , they isolate the filter networks from each other and prevent interaction between them resu Iting accurate and repeatable equalizing performance The cut/boost controls R21 R22 and R23 feed an in-phase OuI- of-phase proportional signal the buffer amplifiers 25, 26 and 28 espective The level the signal fed the buffers dependent on the cut/boosT control setting with maximum level occurring either end the potentiometer and nuli setting the potentio- meter mid-position Full clockwise full counterclockwise potentio- meter settings wiii result the maximum equalization +15 dB and -15 dB respectively The outputs buffer amplifiers 25_ 26 and 28 are routed the 4-126 printed circuit board which contains three bandpass filters corresponding each the three sections the equa izer _ 2-1

4-126 EQUALIZER FILTER AMPL IFIER The 4-126 equalizer filter amplifier printed circuit board utilized as an internal component certain WBS 460 series equalizer modules. The 4-126 comprises three independent state variable filter networks, designed operate the Low Frequency Mid Frequency and High Frequency bands the audio spectrum respectively Each these three filter sections functions pass shaped portion the audio spectrum thus genera ting correction signal be summed with the primary signal passing through the module.

conjunction with components external the 4-126 and part the main module, possible control the different parameters equalization indepen - dently each other such as frequency boost/cut and Each the three filter networks consists three operational ampli- fiers, one which operates the summing mode, with the two others functioning as integrators the summing amplifier, the outputs the two integrators are mixed with the original filter output signal, the compound output turn being fed back the integrating amplifiers.

Depending upon where the signal inserted set three operationai amplifiers, band-pass Pass characteristics are achieved withdrawn from this high pass, low- With the appropriate external circuitry, the 4-126 can be used generate: BAND-PASS within each BAND REJECTION characteristics the three frequency bands LOW-PASS positive characteristics negative SHELVING HIGH-PASS positive characteristics negative SHELVING 4-126 1-1

M463K SUBMASTER_MODULE Gain: Unity +/ - 0.5 dB _ (With fader dB "in-hand" position. Frequency Response: +/ - 25 dB from 20 Hz kHz _ (Equalizer in bypass position. Noise: dB below -10 dBm nominal output level (20 Hz to 20 kHz ) Harmonic Distortion: Less than 0.25% from Hz 20 kHz +28 dBm less Typically less than 0.05% across most bandwidth) Source Impedances: Summing 30 , 000 ohms balanced Direct: 600 onms less balanced Input Impedances: Summing Less than Direct: 0oo ohms ohms Output Impedance Less than 100 ohms (at outputs 8-109A amplifiers only 8-109 Load Impedance: 600 ohms balanced and DRECT output) .

(at insertion point Output Level dBm nominal insertion. ~10 dBm nominal DIRECT output _ +28 dBm maximum (at outputs 8-109 8_109A amplifiers only ) Phasing: Input and output terminals designated by numbers are phase. Power Requirements volts dc, 100 MA nominal 300 MA maximum Ambient Temperature: 60 degrees Celsius Dimensions: wide 14.5" high 6.5" deep (41 Mm 360 mm 165 Mm) 1-1

M463k INPUT MODULE 13) MASTER ASSIGNMENT switches SW24 and SW25: When depressed RIGHT output signal fed via summing resistors externa master summing buses M2 and/or M4 respectively 14) PUBLIC ADDRESS LEVEL control R13/14: Controls level PA output bus 15) STAGE AMPLIFIER level control R17/18: Controls level SA output buses 16) PRE/POST STAGE AMPLIFIER switch Sw18: Allows choose the Pick-up point for the STAGE AMPLIFIER signal either prior (PRE) after (POST) the submaster fader _ 17) PRE/POST FOLDBACK swi tch SW2o: Allows choose the pick-up point for the FOLDBACK Signal routed ou tputs FB3 and ther prior (PRE) or after (PoST) the channel fader .

18) FOLDBACK LEVEL control R17/18 19) and R19/20: Control levels FBI , FB2 , FB3 and FB4 output buses 20) PRE/PosT FOLDBACK switch Sw19: Allows choose the pick-Up point for the FOLDBACK signal routed outputs FBI and either prior (PRE after (Post) the submaster fader . 21 ) hIGH FREQUENCY section BooST/cuT control R21 Continuously variable from dB +15 dB .

Sets gain loss high frequency content the program material with reference the nominal level - 22) MId FREQUENCY section, BoosT/cut control R22: Continuously variable from dB +15 dB Sets gain loss mid frequency content the Program material with reference the nominal level 23 ) Low FREQUENCY section BoosT/cut control R23 : Continuously variable from dB +15 dB . Sets gain loss low frequency content the Program material with reference the nominal level 24) PAN control R24 R27: Positions channel signal between assigned mixing buses (left and right) _ 25 ) SUB ON switch SW21 When depressed, feeds signal main outputs, as wel | the PA; FB, SA and SOLO outputs Additionally SW21 equipped with contacts provide externa control functions.

Note that the PFL output not routed through SW21 6-2

M463K inPUT MODULE MASTER ASSIGNMENT switches SW22 and Sw23 : When depressed, LEFT output signal fed summing resistors externa master summing buses and/or M3 respectively _ PUBLIC ADDRESS switch Sw3: With switch depressed, the output signal fed the PA output. PRE/POST PUBLIC ADDRESS switch SW4: Allows choose the pick-up point for the PUBLIC ADDRESS signal either prior (PRE) after (PosT) the submastcr fader STAGE AMPLIFIER switches SwS and Sw6: With either Swi tch depressed, the output signal fed the appropriate SA outpul_ FOLDBACK switches SW7, Sw8, SW9 and Swio: With either switch depressed, the output signa fed the appropriate FB out- put HIGH FREQUENCY section: FREQUENCY

control R1/2 . Continuously variable from 25 kHz The calibration de- fines the dB corner point from the max mum available SHELV- ING BoOST cut dB _ MID FREQUENCY section, FREQUENCY

control R4/5: Continuously variable from 6.4-kHz _ The calibration refers the center frequency the bell-shaped PEAKING res-_ ponse curve: MID FREQUENCY section,

R6: Allows 0-factor the PEAKING filter for values from 10 . vary the Low FREQUENCY section, FREQUENCY

control R7/8: Continuously variable from 400 Hz The calibration defines the dB corner point from tne maximum available SHELVING BOOST cut 15 dB 10) EQUALIZER INSERT switch Sw13: When depressed, this switch inserts the EQUALIZER section into the signal path and acti- vates the associated LED . When released, the unequalized input signa bypassed directly the 8-109A output amplifier 11) PAN switch Sw14: When depressed, enables PAN controi 12) SOLO switch SW16 : When depressed, the signal following the subma ter fader fed the SOLO output 6-1

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Tne 8-109 ser ies of alnQ lif ie no a"e u til i z ed a s a n in te""al component w i l h in " a .. io us was se ries of audi o con sole modules. Eac h 8-109 ....mp llfl e r mou n lS a . a pl u g_ in ....s sembly onto lhe module mo lherboard .

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Th e foll o wi ng s p ec ifi c a ti o ns a pp ly 10 In e 8- 109 s e r ie s 01 a mp li fi e ....

8.1 09 Balll nced I S ea 8.109A Unba lanced , 'B 8 . 109 B Ba lanced 18 d8 8. 109C Ba lanced 39 d8 8-1090 Unb alanced 29 dB 8-109E Bal anced 29 dB 8- I09F Bal anced 33 dB 8-10% Balanced 23 ee

F ..eq uency Re sponse : +/- 0 .2 d B f l'O<Tl 20 Hz 10 20 k Hz.

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4-141 summing AMPLIFIER PART DESCRIPT ION MFG MFG PART_NUMBER Capacitor 330 uF/6 330 uF/6 6800 100 pF 220 pF Kemet T390F 337MOO6A5 Aselco Philips co92-MC-100-682M 2222 638-70101 2222-630-03221 5800 pF 100 pF 220 pF 33 uF/10 1000 pF Aselco Philips co92-MC-100-682m 2222-638-70101 2222- 530-03221 T390D336M010AS co92-MC-100-102m Kemet Aselco 330 pF Philips 2222-630-03331 2222-638-70479 ete Capacitor 100 3.3 2222- 638- 70101 2222-638-09338 C15 uF/1o 10 uF/25 uF/25 uF/35 uF/35 Kemet T3900336M01OAS T390C1O6MO25AS T390B105M035AS c20 C21

pF pF 220 Philips 2222-638-03278 2222-630 03221 Transistor National PN3569 PNS 138 PN3569 PNS138

Resistor 1/4w 59 47K 47K 7k5 1KB Philips 8 R6 R7 15K 100

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4-126 EQUAL IZER FILTER AMPLIFIER PART DESCRIPION MFG MFG PART_NUMBER Resistor 1/4w 5% 10K 10K 620 22K = TK Philips -

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