Audio-developments AD146 Manual do Utilizador

0CONTENTSSCENARIO 1INTRODUCTION 3UNPACKING 3VISUAL INSPECTION 3SPECIFIC POINTS 3IMPORTANT SAFETY INSTRUCTIONS 6POWERING 7TECHNICAL SPECIFICATION 8EQUA

9NOISE MIC <-126dB 20Hz to 20kHz 200R SOURCE(WITH RESPECT TO THE INPUT)LINE >70dB SIGNAL-TO-NOISE RATIO 20Hz to 20kHzLIMITER THRESHOLD +8dBRATIO

10TECHNICAL SPECIFICATION - MECHANICALAD146 is supplied with 6, 8, 10 or 12 input modules. A separate meter bridge fittedwith 4 VU or PPM meters is su

11SIZEDROP THROUGH VERSION OF MOUNTING6 I/P 8 I/P 10 I/P 12 I/PA318 379 440 501B 324 385 446 507C 369 430 491 552MEASUREMENTS IN MILLIMETRESWEIGHT AS

12EQUALISATION CURVES

13CONNECTOR PANEL(1) Microphone inputor Line 1 of mono inputor Left of stereo input(2) Line inputor Line 2 of mono inputor Right of stereo input(3) Ma

14All input and output impedances are to be found in the TECHNICALSPECIFICATION.All inputs to, and outputs from AD146 are to be found on the connector

15External powering of the mixer is via a 4-pin XLR (13).XLR Pin 1 0V Pin 3 15V - 24V DCPin 2 Charge Pin 4 12V - 15V DCA suitable external power suppl

16MICROPHONE/LINE MODULE(1) Phantom-power toggle(2) Phase-change toggle(3) Input-gain selector(4) High-frequency amplitudecontrol(5) Mid-frequency amp

17The transformer-balanced, ultra-low-noise microphone amplifier does not require aninput attenuator as the available 50dB gain change is achieved wit

18S-switch (15) - creates a matrix amplifier across an adjacent pair of input modules.Refer to M-S NOTES.The panoramic potentiometer (7) routes the si

1SCENARIOTime was when it became necessary to update the ubiquitous AD145 PICO mixer.Our survey showed two main requirements: as well as Audio Develop

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20MONO LINE MODULE(3) Input-gain control(4) High-frequency amplitudecontrol(5) Mid-frequency amplitudecontrol(6) Low-frequency amplitudecontrol(7) Pan

21For optimum performance at line level, this module employs a double-balanced,instrumentation-grade input amplifier (3 x ICs) rather than the inferio

22STEREO LINE MODULE(13) EQ selector(14) Matrix selector(16) Channel fader(15) Routeing to monitor 1(9) Pre-faderlisten(10) PFL indicator LED(11) Over

23For optimum performance at line level, the stereo module employs RFI suppressed,double-balanced, instrumentation-grade input amplifiers.The input-ch

24(NOTE: It should be realised that a pair of mono input modules will always be moreflexible and versatile than a stereo module.)

25OUTPUT MODULE(11) Battery indicator(15) B or D to meter 2(13) Mon left to meter 1(17) 1kHz or 10kHz line-up(18)Continuous or interruptedline-up tone

26The meters are to broadcast specification with switchable functions; PPM and VUmovements are available to choice.The upper meter (1) reads battery s

27ADJUSTMENTS AND CALIBRATIONSRefer to component location diagrams in TECHNICAL LIBRARY.Line-up-tone oscillator - the preset (VR1) that adjusts its le

28Output limiters - calibration involves four presets per output; however, only two areinvolved with a particular parameter. Using 'A' outpu

2Being latter-day converts, we have included circuitry to take full advantage of all M-Stechniques - even shuffling - in both production and post-prod

29MONITOR MODULE(1) Channels to monitor(2) A output to monitor(3) B output to monitor(4) A-B output to monitor(5) C output to monitor(6) D output to m

30The monitor module is associated with all aural monitoring of input and output signalstogether with communications between the sound operator and an

31has been matrixed to the L-R domain by DEC (13). Any signal in the L-R domain maybe matrixed (13) in order to reveal mono capability on monitor 1 le

32M-S NOTESThe M-S techniques proposed by Alan Blumlein in the early nineteen-thirties haverecently been (re)discovered. These techniques fall into tw

33Blumlein's microphone techniques have advantages over all others (X-Y and A-B)such that it is worthwhile using M-S microphones even when mixing

34When mixing in the M-S domain (and) using M-S microphones, M-channels will bepanned left, S-channels will be panned right and spot microphones will

35POWER SUPPLY UNITTYPE AD100-09The AD100-09 mains POWER SUPPLY UNIT is suitable for driving most ofAUDIO DEVELOPMENTS’ range of portable audio mixers

36It is DANGEROUS to change the specification or modify the product in any way.CUSTOMER NOTES AND FACTORY MODIFICATIONS

37TECHNICAL LIBRARY

3INTRODUCTIONUnpackingIf there are any signs of damage to the outside of the carton, please notify us or yoursupplier immediately, regardless of the u

4Fuses - to protect the mixer and internal power supply are mounted on the powersupply/converter board. Access is gained by removing the output module

5Microphone powering - the mixer will remain unconditionally stable if the powering onunterminated input channels is switched off - this also improves

6WARNINGIMPORTANT SAFETY INSTRUCTIONSThe user of electrical products must be familiar with their potential dangers, andfundamental precautions must al

7POWERINGThe mixer may be powered from either internal cells or an external DC power source.The integral battery compartment requires a total of 10 si

8TECHNICAL SPECIFICATION - ELECTRICALREFERENCE 0dB = 775mV at 1kHz unless otherwise statedMAX GAIN MIC 85 75 65 55 45 35 dBLINE 50 40 30 20 10 0 dBMAX