M463L — Submaster Module

8-109 AMPLIFIER SERIES

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Noise: -108 dBm EIN from 20 Hz to 20 kHz.

Source Impedance: 600 ohms or less, balanced or unbalanced.

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WARD-BECK SYSTEMS LTD. . T

8-109 AMPLIFIER SERIES

Output Level : +30 dBm max imum.

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M463L_SUBMASTER_MODULE bandpass filter passes only portion the signal delivered from the buffer, with the center frequency and bandwidth determined by the FREQUENCY , "Q" and PEAK/SHELF controls . The HIGH FREQUENCY equalization continuously adjustable from kHz and controlled by RI/R2 R21 determines the amount cuT BOOST total range from +15 dB provided With SWI depressed the unit wili produce high frequency SHELVING characteristic.

When Swi released, both positive negative PEAKING can be obtained. The control R3 effective only with SW1 the PEAKING mode and covers 0-factor range The MId FREQUENCY equalization adjusted by RA/R5 , covering frequency range from 0.4 kHz cut/boost controlled by R22 R6 adjusts the 0-factor_ Positive negative bell-shaped PEAKING equalization applicable the mid-frequency range- The LOw FREQUENCY equalization operates similarly the high frequency section.

R7/R8 adjusts the frequency range from 400 Hz . cut BOOST are controlled by R23, by R9 and SW12 determines the choice either SHELVING PEAKING characteristics_ The three signals which leave the 4-126 filter are correction signals" either in-phase 180 degrees out-of-phase with the equalizer input ana bandpass limited determined by the equalizer section and control settings These correction signals are then summed together with the primary input) signal by tne operational amplifiers 21 , 22 and 24 thus forming the equalized output signal_ This concept adding correction signal together with the incoming signal form the equalized signa directly responsible for the low noise and distortion capabilities this unit The compound signal as generated long the entire processing chain appears the output 24 _ From here routed one the normally open contacts the EQUAL IZER INSERT switch SW13 _ Thus with SW13 depressed the equalized signal fed the output amplifier 8-109A .

addition, as SW13 depressed, the LED indi- cator activated_ 2-2

M463L SUBMASTER MODULE The M463L combination SUBMASTER/EQUALIZER module, designed combined mixed feeds from previousiy assigned mixing accept channel inputs. As may be required the unit processes the mixed signal, equalizes and routes the appropriate points within the console system. Input and Summing Amp ifiec The signal orignating from the external mixing network applied the edge connector pins and and subsequently connects the current nodes the 4-141 summing amplifier To facilitate summing module testing, direct input provided on P1 , pins and EQUALIZER Section The output 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 amplifiers through 24.

through 24 serve as mixing and isolation amplifiers They are used mix the primary input signal with correction signal derived Trom the outputs the 4-126 filter networks; resulting raising lowering thc level selected portions the audio spectrum Additionally they isolate the filter networks from each other and prevent interaction between them resulting accurate and repeat- able equalizing performance The cut/boost controis R2I R22 and R23 feed an in-phase out- proportional signal the buffer amplifiers 25, 26 oT-phase and 28 respectively 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 result the maximum equalization +15 dB and -15 dB respectively _ The outputs buffer amplifiers 25, 26 and Z8 are routed the 4-126 printed circuit board which contains three bandpass filters corresponding each the three sections the equalizer .

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M463L SUBMASTER_MODULE Gain: +18 dB +/ - 0.5 dB . (bridging gain) (With fader dB "in-hand" position. Frequency Response: 0.25 dB from 20 Hz to 20 kHz . (Equalizer bypass position. Noise: dB below dBm nominal output level 20Hz to 20 kHz) _ Harmonic Distortion: Less than 25% from Hz 20 kHz +28 dBm less Typically less than 0.05% across mos" bandwidth) Source Impedances Summing 30, 000 ohms balanced Direct: 600 ohms less balanced Input Impedances Summing: Less than Direct: 30,000 ohms ohms Output Impedance: Less than 100 ohms (at ouiputs 8-109A amplifiers only ) 8-109F Load Impedance: 600 ohms balanced (at insertion point and DIRECT output) Output Level dBm nominal insertion +8 dBm nominal DIRECT output +30 dBm maximum (at outputs 8-109F 8-109A amplifiers only Phasing: Input and outpu terminals designated by numbers are in phase.

Power Requirements: volts dc, 100 MA nominal 300 MA maximum Ambient Temperature: degrees Celsius. Dimensions: wide 14.5" high 6.5" deep (41 mm 360 Mm 165 Mm ) Weight: ozs (1150 gms) E

M463L SUBMASTER_MODULE MASTER ASSIGNMENT switches Sw22 and SW23 : When depressed LEFT output signal fed via summing resistors externa master summing duses Mi andfor M3 respectively. PUBL IC ADDRESS switch Sw3: With switch depressed, the output signal fed the PA output _ PRE/POST PUBLIC ADDRESS switch Sw4: Allows the choice the pick-off point for the PUBLIC ADDRESS signal either prior (PRE) after (PoST the submaster fader 4 ) REV SEND switches SWS and SW6: With either switch depre essed (ne output signal fed the appropriate RS output _ FOLDBACK switches SW7 SW8 depressed the ouiput signal SW9 and SWIO: With any switch fed the appropriate FB output hiGH FREQUENCY section: FREQUENCY

control R4/5: Continuously variable from 0.4 4-kHz The calibration refers the center frequency the bel l-shaped PEAKING response curve_ 10) MID FREQUENCY section 0-ADJUSTMENT R6: Allows adjustment the O-factor the PEAKING filter for values from 10

8-109 AMPLIFIE R SER IE S

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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

4-141 2-1

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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