AD161 User Manual
Contents
1. NI IN A IND H2 JSYHd l 7 INPUT PANEL LAYOUT 1 Microphone power i H gt l 4 Electronic 5 balanced 2 dee phase I input XLR U I gt switch O a 3 Mixer off on ae 2 5 6 AA Cells Input Panel Details Input XLR connector 4 accepts balanced microphone level signals XLR input 8 output Pin 1 Shield Pin 2 Signal Pin 3 Signal the case of unbalanced signals pins 1 8 should be connected together This will not lead to a loss of signal level The microphone input functions are as follows Switch 1 selects 48V phantom and 12V tonader power for use with condenser microphones Powering may be selected before or after connecting microphone but switch off all powering on unterminated modules to ensure unconditional stability of the mixer Input 2 has a phase change 2 which operates on the input signal is the normal position A two position toggle switch 3 turns the mixer OFF ON and any auxiliary equipment powered via the MULTIWAY connector It selects either internal batteries or an external DC source When external power is applied it takes precedence over the internal batteries Power to the mixer is confirmed by the MIX ON2. RETURN 18dBu AUX INPUT 18dBu gt 2k5R RETURN gt 10kR AUX INPUT gt 100kR 48V PHANTOM 8 12V TONADER 423dBm TRANSFORMER BAL 6008 LOAD 418dBm MONITOR 600R LOAD lt 60R MAIN lt 20R MONITOR 182 0 1dB MAIN OUTPUT 0 1 5dB MONITOR PATHS lt 0 05 1kHz 0dBm OUTPUT lt 0 20 50Hz to 15kHz 15dBm OUTPUT lt 65dB 40Hz to 15kHz INTERCHANNEL MIC lt 125dB EIN 20Hz to 20kHz 200R SOURCE HPF PRE TRANSFORMER 12dB OCTAVE 3dB 150Hz 3dB 90Hz THRESHOLD 8dB RATIO 10 1 ATTACK FACTORY SET 1 0Ms RELEASE FACTORY SET 250Ms 80mA FROM 12V DC SUPPLY WITHOUT POWERED MICS Mechanical SIZE CASE 180mm X 146mm X 58mm SIZE O A 205mm X 168mm X 64mm WEIGHT 1 15kg INC BATTERIES 5 5 0001 DOL INT IH HO IE IIIA HI WT 191 V BLOCK DIAGRAM 6 10810402 1947 100 541 100 SLIDA E S o olju D do 136 13A31 138 DIW 330v 4 12 div o 06575450 06
3. LED The internal battery compartment 5 reguires a total of 6 AA cells Access is gained via a captive lid which is retained by one 90 degree turn fastener The lid hinges outwards from the side panel 10 8 TOP PANEL LAYOUT 1 Meter PPM VU sa CIN P a Y 2 Talk to monitor 2 U LLI 3 Slate level control gt sli 4 Limiter selector 8 threshold indicator j EN 5 Output level control L lt 9 Batterv status at 10 Mixer on e indicator 11 1kHz tone inject a f 12 Slate mic i inject 0 5 13 Aux to output OP AUX Ho 14 Monitor select 4 15 Monitor 1 level control 4 16 High pass filter 4 17 Pre fade listen select Top Panel Details The input gain of the microphone amplifier is set by the 2 position switch 7 The maximum gain is either 60dB or 70dB determined by the position selected Input level is controlled using the INPUT LEVEL control 8 The control acts on the microphone pre amplifier gain and also performs the function of a conventional fader This facilitates the maximum input signal capability increasing when the signal level gain is reduced The high pass filter 16 operates on both input level settings When selected the filte
4. electronically balanced tape return enters the mixer on the MULTIWAY connector 7 Adjacent is the return input calibration preset 6 MULTIWAY Pin1 Return Pin 4 Output Pin 2 Return Pin 5 Output Pin Volts out Pin6 OV The headphone monitor 1 output appears on an A type stereo jack 1 The monitor may be configured internally to allow either the main monitor signal OP RET or AUX on both sides of the headphones or alternatively the main monitor signal on the left earpiece and AUX input 3 on the right earpiece This latter configuration can be set by DIL 2 and DIL 4 Refer to Adjustments and Calibrations The headphone monitor 2 output appears on A type stereo jack 2 Level is set using the associated preset control The monitor may be configured internally using DIL 3 to monitor either the main monitor signal OP RET or AUX or the signal from input 1 This enables for example an outstation to receive only the signal from the boom microphone if feeding input 1 Selecting TALK overrides the monitor signal allowing the mixer operator to communicate with an external station The electronically balanced AUX input enters the mixer on an A type stereo jack 3 The level of signal is set using the associated preset control The AUX can also be used as a fourth input allowing a line level signal to be routed to the main output It also appears in the monitor section and can be used as a second return or communication in
5. is mounted on the main printed board 62 016 020 Should a fault condition arise the link will reset when the reason for the fault has been removed Limiter threshold is set at the factory at 8dBu but an internal preset potentiometer allows adjustment to any other level above OdBu Microphone powering the mixer will remain unconditionally stable if the powering on unterminated input channels is switched off this also improves the noise performance and crosstalk Powering 48V phantom PH or 12V tonader TA may be selected before or after the microphone is connected to the module We wish you many trouble free hours of use from your mixer As a company we are fully committed to BS EN ISO 9001 Should you have any problems or reguire any further information please do not hesitate to contact us WARNING 2 IMPORTANT SAFETY INSTRUCTIONS READ The user of electrical products must be familiar with their potential dangers and fundamental precautions must always be taken Please read the following text carefully Power supply units manufactured by Audio Developments Ltd are not user serviceable There are no user serviceable parts associated with any such power supply unit THE OUTER COVERS MUST NOT BE REMOVED Such a power supply unit is solely for use with audio mixers and sound processors hereafter called the equipment manufactured by Audio Developments Ltd Always use cord set accepted by a National Ap
6. to change the specification or modify the product in any way 19 12 CUSTOMER NOTES AND FACTORY MODIFICATION 20 14 TECHNICAL LIBRARY 21
7. 11 12 14 INTRODUCTION READ MET 1 IRB ACK ING cr idol 1 Vis al e ad 1 Spe ifi Points READ ME iis tora trato 1 IMPORTANT SAFETY INSTRUCTIONS READ 2 POWERINQG a S E 3 TEGHNIGAL SPECIFICATION iiic tn 5 i 5 Mechanical s onion citet tos aen n A TAT PARSE auae E a d Ca REA n d 7 DIAGRAM T cUm 8 INPUT PANEL ERYOU A EERE 9 Panel Details iii o to i 10 TOP PANEL RP OUR PTT pe ns Gr ed 11 Top Patel Details 12 O tp t Panel Detalle ufu ot u moi a rre Coe PER c Et 15 ADJUSTMENTS AND eene 16 Meter CallDEatlOEls cou oet bebat rninn bas 16 PR Mi 16 Line Up T one Oscillator tic 16 Low Batt ery IMA ALONG a la 16 O tp t lts RN D 17 Internal Settings 62 0162020 17 internal Settings 62 016 021 d v n RETIRO REP ano ER RR UE 18 POWER SUPPLY UNE aia oh i dte x ui eoe 19 CUSTOMER NOTES AND FACTORY 20 TECHNICAL LIBRARY i acoso dealt o 21 1 INTRODUCTION READ Unpacking If there are any signs of damage to the outside of the ca
8. his is because under these conditions an high signal level could then be present at the pre fade point and if routed to the headphones would create a high pressure level causing pain to the ears 9 1 Monitor 1 output 2 Monitor 2 output 8 level control 3 Auxiliary input amp level control OUTPUT PANEL LAYOUT N N N ss e gt ZZEE lt AXLO2 gt JASAL FEREE 7 uu gt gt gt 255 000 E NOtTLOO N i 5 06 S 2 4 Output XLR o Ne F a Se transformer 522 m _ e m Made in England by Audio Developments Ltd b Hall Lane Walsall Wood Walsall WS9 9AU Tel 44 0 1543 375351 Fax 44 0 1543 361051 email support audio co uk MULTIWAY Serial Number lt 5 External power connector lt 6 Return level control 7 Output amp return multiway 8 Output level attenuator 14 Output Panel Details Main output XLR 4 is transformer balanced and may be switched between microphone level and line level 8 Main output is also available at the MULTIWAY connector 7 and can be set internally using DIL 5 to follow or bypass the output attenuator 8 The factory setting is line level Output XLR Pin 1 Shield Pin 2 Signal Pin 3 Signal The
9. ndicator that illuminates when the PSU is operational FOR SAFETY REASONS AD100 09 POWER SUPPLY UNIT MUST BE CONNECTED MAINS EARTH maintenance to the PSU or its mains cable assembly should be performed by a qualified engineer CHARGING If nickel cadmium cells are fitted in an 0140 series mixer they may be recharged in situ from AD100 09 power supply whether the mixer 5 in use or not Maximum current is set at 250mA in addition to the 500mA of current supplying the audio electronics The charging circuit has its own ON OFF slide switch and LED indicator DO NOT ACTIVATE THE CHARGE CIRCUIT UNLESS THE MIXER IS FITTED WITH NICKEL CADMIUM CELLS FUSES Two 20mm ANTI SURGE fuses protect AD100 09 against fault conditions Should either fail it is strongly recommended that the cause be traced Refer to the TECHNICAL LIBRARY Only suitably qualified personnel should service the power supply unit The fuse holder on the front panel contains the mains fuse 250mA HRC TYPE T 240v AC For continued safety the specified fuse link must be fitted in the mains fuse holder when a replacement is required Ensure it is of a type approved by a National Approved Body DC OUTPUT XLR PIN 1 OV PIN 3 NOT CONNECTED PIN 2 CHARGE PIN 4 14 DC DO NOT REMOVE THE OUTER COVERS NOTE The power supply unit should be serviced by a suitably qualified engineer Only genuine spare parts with identical specification must be used Itis DANGEROUS
10. pproximately 2 0V After setting VR109 adjust the output signal to just greater than 8dBu with the limiter deselected Introduce the limiter and adjust VR108 until the output signal falls to 48dBu This is the THRESHOLD setting If a different threshold setting is reguired alter the signal levels accordingly The DC voltage at PIN 3 of IC 105 should be approximately 0 6V different from that at PIN 7 Internal Settings 62 016 020 DIL 2 PRE HILO POST MON di OUTPUT DIL 1 Internal Settings 62 016 021 DIL 101 HP 1 L O a n b HP 2R O VR106 SET LOW BATTERY VR108 O VR109 O SETO DIL 102 AUX CH1 RET HP1 ab 18 11 POWER SUPPLY UNIT TYPE AD100 09 The AD100 09 mains POWER SUPPLY UNIT is suitable for driving most of AUDIO DEVELOPMENTS range of portable audio mixers This PSU is single rail device providing 500 of current at 14V DC potential and is used as a substitute for battery power with mixers containing an internal DC DC converter The AD100 09 may be powered from either a 110V 120V AC source or a 220V 240V AC source Ensure that the AC Voltage Selector Switch on the front panel 15 in the correct position for the source in use Operating the equipment at the wrong voltage could be hazardous Care must be taken to connect the LIVE NEUTRAL and EARTH pins of the PSU s IEC mains connector to the corresponding terminals associated with the AC source The ON OFF switch contains an i
11. proved Body EARTHING GROUNDING When using an external power supply unit that is connected to the mains supply to drive the mixer it must be CONNECTED TO EARTH certain types of malfunction or breakdown earthing provides a path of least resistance for electric current and considerably reduces the risk of electric shock DANGER Incorrect connection of the equipment grounding earthing conductor can result in the risk of electric shock Where possible obtain a pre wired mains lead from a reputable supplier with the correctly fitted mains connector for the type of mains outlet in use otherwise one correctly wired and checked by a gualified electrical engineer If your mains lead is not suitable for the mains outlet have the correct plug fitted by gualified personnel The MAINS PLUG of this eguipment is the primary disconnect device Therefore in the final application ensure it remains close to the eguipment and easily accessible 3 POWERING The mixer may be powered from either internal cells or an external DC power source The integral battery compartment reguires a total of 6 AA cells Access is gained via a captive lid which is retained by a 90 degree turn fastener The lid hinges outwards from the side panel Either conventional dry or rechargeable cells may be used Ensure correct cell rotation when populating the battery compartment Note There is no internal charge facilitv on the AD161 When driving the mixer from an exte
12. put when operated in conjunction with the TALK facilitates a two way conversation between mixer operator and external station External power is supplied to the mixer via the 4 pin male XLR 5 Refer to powering section for details Power XLR Pin1 OV Pin2 N C Pin3 N C Pin 4 9V to15V DC 10 ADJUSTMENTS AND CALIBRATIONS Meter Calibration The meter either VU or a PPM type may be selected VU meter There is one preset VR1 on PCB 862 016 022 for meter adjustment Introduce a 1kHz tone from a signal generator to an input Adjust levels to achieve a reading of 4dBu at the main output on an AC millivoltmeter measured across pins 2 and 3 of the output XLR Ensure that the meter mechanical zero is set then adjust VR1 preset to give a meter reading of OVU PPM meter The PPM driver printed circuit 62 016 023 has three calibration controls presets VRI adjusts the reference level VR2 and VR3 adjust the law of the meter adjusts the upper sector of the scale and adjusts the lower sector To initiate calibration set each preset to its mid position Using the tone generator and millivoltmeter as described above adjust mixer levels for a reading of 6dBu on the millivoltmeter from the main output Adjust VR1 for reading of 12 Increase the output signal to 6dBu and adjust VR2 for a reading of 0 Decrease the output signal to 18dBu and adjust VR3 for a reading of 24 Repeat this procedure until an accurate
13. r protects the input circuit from the effects caused by wind traffic air conditioning etc Operating freguencies are to be found in the TECHNICAL SPECIFICATION A fourth input at line level is possible using the auxiliary input The signal is routed to the main output by selecting the auxiliary routing switeh AUX 13 The level is controlled by a preset potentiometer mounted adjacent to the to the auxiliary input connector Mounted on the output panel The OUTPUT LEVEL control 5 is the master controlling the level of any signal mixed onto the main buss and determines the signal level at the main output The limiter may be switched in to the main output LIM 4 A red LED indicates when limiting is taking place The threshold of the limiter the signal level at which the limiter starts to operate is factory set at an output signal level of 8dBu to the Adjustments and Calibrations section for the procedure on how to adjust the threshold level if reguired The 1kHz line up tone when selected 11 replaces the normal signal on the main output Line up tone is calibrated on the PPM scale to 6 giving a line output level of OdBu with the output fader 5 set to maximum The calibration when a VU meter is fitted is an output level of 4dBu OVU The signal from the internal microphone 6 allows the mixer operator to add a voice signal to the main output by operating the switch marked SLATE 12 the level being set by a sc
14. rewdriver operated preset level control 3 TALK 2 enables the mixer operator to communicate with an outstation via Monitor 2 The signal replaces any other appearing at the outstation The meter 1 is factory set to read main output Alternatively it may be set to follow MON 1 switch 14 to read either main output monitor output or aux input This is determined by a DIL switch mounted on printed circuit 62 016 020 Refer to Adjustments and Calibrations The main output signal is metered and monitored after the output fader and limiter The monitor signal is metered before its level control Please refer to the Adjustments 8 Calibrations section for setting instructions 12 Battery status is read on the meter 1 selecting 9 When a VU meter is fitted the OVU mark indicates minimum battery volts When the internal voltage drops below a safe operating level the MIX ON indicator LED 10 will flash The remaining controls are associated with headphone monitoring at monitor 1 Output OP tape return or Auxiliary AUX may be selected 14 these signals are also available at Monitor 2 The level of Monitor 1 signal is controlled by potentiometer 15 Pre fader listen 17 routes input signals to the monitor PFL mix buss for auditioning on headphones and overrides the main monitor signal at Monitor 1 Caution Care should be taken when operating the PFL if a high signal level is being fed into an input T
15. rnal power source PIN 1 is the OV connection and a voltage in the range 9V to 15V DC should be supplied to PIN 4 The power source should be capable of delivering approximately 250mA allowing some capacity for phantom powering If an external power supply unit PSU is to drive the mixer a current capability of at least 250mA is required It is poor practice to run a PSU at its limit therefore we recommend a minimum of 500mA Audio Developments AD100 09 PSU is a suitable unit WARNING When NOT using the PSU AD100 09 supplied for the mixer ensure your 4 pin XLR is correctly wired to match the POWER IN connector Failure to do so may result in the breakdown of the internal DC DC converter Make this check even if using a PSU which may have been supplied to you in the past eg AD100 06 or AD100 05 NOTE No facility for charging nickel cadmium cells exists within the AD161 Mixer If these type of cells are used they must be recharged using a separate unit outside the battery box housing of the mixer 5 15 4 TECHNICAL SPECIFICATION Electrical REFERENCE 0dB 775mV at 1kHz unless otherwise stated GAIN MAX INPUT LEVEL INPUT IMPEDANCE MIC POWERING MAX OUTPUT OUTPUT IMPEDANCE FREQUENCY RESPONSE HARMONIC DISTORTION CROSSTALK NOISE HIGH PASS FILTER OUTPUT LIMITER CURRENT CONSUMPTION MIC 75dB continuously variable 60dB continuously variable MIN 4dBu
16. rton please notify us or your supplier immediately regardless of the unit s apparent physical condition This is in case a claim has to be made at a later date because of previously undetected transit damage The packaging material should not be discarded until the mixer has been acceptance tested and a suitable transit storage case is available for secure safe storage Visual Inspection Identification please make a separate note of the serial number for your own capital eguipment records Ensure that it agrees with the number on the invoice packing note The serial number label is on the output panel Temperature check the meter glasses for condensation If the package has been transit during cold weather leave the mixer for at least 12 hours to allow it to return to normal room temperature Any measurements or subjective tests then made will be to a known temperature reference Specific Points READ ME Battery compartment the mixer has an integral battery compartment to accept 6 cells Do not allow batteries to run below 1 0V per cell as this will degrade the performance of the mixer Access to internally assignable DIL switches requires the removal of the bottom panel and side covers Testing and calibration should only be undertaken by suitably qualified engineers If in doubt contact the factory or your agent for advice protect the mixer and internal power supply an automatic reset fuse
17. set of readings is obtained without further adjustment to any of the presets being reguired Now check the calibration of all meter points Line Up Tone Oscillator To adjust tone level at the output of the mixer apply an AC millivoltmeter across pins 2 8 3 on the output XLR and adjust preset VR3 mounted on printed circuit board 62 016 020 to achieve the desired reading Factory settings OdBu when PPM meter fitted 4dBu when VU fitted Low Battery Indicator The low reading is set at the factory and corresponds to a set of batteries having discharged to 1 volt cell On a VU meter low volts is at OVU On a PPM meter it is indicated by a separate marking To set apply 6 7v to pin 4 of the external power connector and adjust VR106 located on PCB 682 016 021 and align meter pointer to the appropriate mark 16 Output limiter Biasing and threshold are adjusted as follows VR109 biases the limiter circuit to the point of correct operation and VR108 sets the threshold Labelled SET 0 and THR respectively With no signal present VR109 should be adjusted to give a reading in the range 1 5V to 2 5V at PIN 7 of IC 105 VR108 should be adjusted to give a reading in the range 2 5V to 3 5V at PIN of 105 Apply a signal at 1kHz to the mixer to give a level of OdBu at the main output Then select the limiter function and adjust VR109 until the output signal starts to fall typically 0 2dB The DC voltage at PIN 7 of IC 105 should be a
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