AEQ BC-2500 Broadcast Audio Mixer USER’S MANUAL ED. 01/03 A.E.Q., S.A. manufacturer of this equipment is a Registered Company with UNE EN - ISO-9001 by AENOR ER-080/1/96 standard.
1. GENERAL 1.1. GENERAL PRECAUTIONS 1.1.1. READ ALL INSTRUCTIONS 1.1.2. POWER SUPPLY AND EARTH CONNECTIONS 1.1.3. PROTECTION FROM EXCESSIVE SUPPLY VOLTAGE VARIATION 1.1.4. PROTECTION AGAINST WATER AND HUMIDITY 1.1.5. VENTILATION, FIRE AND INFLAMMABLE VAPOURS 1.1.6. MAINTENANCE 1.1.7. GUARANTEE 2. EQUIPMENT POWER SUPPLY 2.1. GENERAL 2.1.1. BEFORE CONNECTION TO THE MAINS SUPPLY 2.1.2. VOLTAGE SELECTION 2.1.3. SWITCHING ON THE EQUIPMENT 3. AUDIO CONNECTIONS 3.1. GENERAL 3.2. OTHER AUDIO CONNECTIONS 4.
5.6.2. DESCRIPTION OF CONTROLS AND CONNECTORS 5.7. BC-2578 MONITORING, SIGNAL AND CONTROL MODULE 5.7.1. FUNCTIONAL DESCRIPTION 5.7.1.1.CONTROL MONITORS, METERS AND PRE-LISTEN BLOCK 5.7.1.1.1. DESCRIPTION OF CONTROLS 5.7.1.2. STUDIO MONITOR BLOCK 5.7.1.2.1. DESCRIPTION OF CONTROLS 5.7.1.3. COMMAND, INTERCOM, OSCILLATOR AND TIME-SIGNAL BLOCK 5.7.1.3.1. DESCRIPTION OF CONTROLS 5.7.1.4. STUDIO AND CONTROL MONITOR CUT AND SIGNAL ADMINISTRATION 5.7.1.5. REMOTE FUNCTIONS 5.7.2. DESCRIPTION OF REAR CONNECTORS 5.8.
7. CONFIGURATION OF PROGRAMMABLE BRIDGES 7.1.BC-2511 PROGRAMMING BRIDGES 7.2.POSITION OF THE BC-2511 MODULE PROGRAMMING BRIDGES 7.3.BC-2521/22 PROGRAMMING BRIDGES 7.4. POSITION OF THE BC-2521/22 MODULE PROGRAMMING BRIDGES 7.5. BC-2560 A/C PROGRAMMING BRIDGES 7.6. POSITION OF THE BC-2560 A/C MODULE PROGRAMMING BRIDGES 7.7. BC-2533 PROGRAMMING BRIDGES 7.8. POSITION OF THE BC-2533 MODULE PROGRAMMING BRIDGES 7.9. BC-2578 PROGRAMMING BRIDGES 7.
1. GENERAL 1.1. General precautions The following cautionary and security measures must be observed during all phases of operation and maintenance of the unit. Failure to follow the instructions that are highlighted in this manual could affect the specification and function of the equipment. AEQ. S.A. accept no responsibility for damage or injury caused by incorrect operation of the equipment. 1.1.1. Read all the instructions.
1.1.6. Maintenance The maintenance operations of this unit should only be carried out by qualified technical personnel. AEQ S.A. does not accept responsibility for any damage or injury to the equipment caused by maintenance by unauthorized persons, not for any damage or injury to other equipment or persons caused by any unauthorized repair or maintenance operation. Caution. A risk of severe electrical shock exists due to very high voltages that are present in the interior of the power supply unit.
2. EQUIPMENT POWER SUPPLY 2.1. General A description of the module to power supply connection is detailed in Section 5.7 and 5.8. 2.1.1. Before connection to the mains supply Caution: Before the equipment is connected to the power supply, the voltage selector must be checked an if necessary set for the supply voltage as in Section 2.1.2. and the DC power supply cable connected between module BC-2578 and the power supply BC-2523.
3. AUDIO CONNECTIONS 3. 1. General The audio connections of the AEQ BC-2500 mixer comply with the AES 14-1992 (ANSIS 4.48-1992) recommendations. This recommendation is based on IEC 268-12 of 1987. Equipment for sound systems part 12, application of connectors for radio broadcast and similar uses. The audio connection cables should be checked for compatibility with the standards indicated.
4. MIXER DESCRIPTION 4.1. Basic design concepts. The AEQ BC-2500 Audio Mixer has been designed for use in radio broadcast studios together with mobile units, television and sound installations where the quality and reliability of the equipment are fundamental factors. The criteria base for development and fabrication of the audio mixer were based on our extensive experience in the field of radio broadcasting and direct contact with the professionals in the sector.
4.2. Initial Configuration The AEQ BC-2500 audio mixer is supplied with two basic configurations: BC-2500 FM-AUTOCONTROL 1 BC-2501FM 1 BC-2578 2 5 1 2 7 1 BC-2511 BC-2522 BC-2533 BC-2560-A BC-2502 BC-2523 Chassis with capacity for 24/20 modules, with audio meters and PFL monitor loudspeakers. Control, monitor and “intercom” module for controller and announcer. (occupies three module space) Micro/line mono input module. Double switchable stereo input module.
5. MODULE DESCRIPTION 5.1. BC-2511 MICRO/LINE MONO INPUT MODULE. 5.1.1. Functional description. The micro/line mono input module BC-2511 permits the connection of two independent inputs; one microphone level (21) and the other line level (22), selection being carried-out by means of the switch (1) MICRO/LINE. Push-bottom (3) HFF activates a radiofrequency filter.
5.1.2. Description of Controls and Connectors. FRONT 1 2 3 4 5 6 7 8 9 10 11 12 1.2.3.4.5.- Input switch MICRO/LINE Gain adjusting potentiometer GAIN Radiofrequency switch HFF Treble frequency level adjusting potentiometer TREBLE Middle frequency parametric equalizer potentiometer MID/FREQ 6.- Middle frequency level adjusting potentiometer MID/GAIN 7.- Bass frequency level adjusting potentiometer BASS 8.- Equalizer activation switch EQ.ON 9.- Saturation level led indicator CLIP 10.
5.2. BC-2521 DOUBLE LINE EQUALIZED STEREO INPUT MODULE. 5.2.1. Functional description The Double Line Equalized Stereo Input Module BC-2521 permits the connection of two stereo inputs A and B. These lines are connected to (23) INPUT A (L) and (24) INPUT A (R) for the left and right Line A channels and (26) INPUT B (L) and (27) INPUT B (R) for the left and rigth Line B channels, selection is by switch (1) INPUT A/B.
5.2.2. Description of Controls and Connectors. FRONT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 1.2.3.4.5.6.- A/B Input selector switch INPUT A/B Mono/stereo selector switch ST/MONO Gain adjusting potentiometer GAIN Radiofrequency switch HFF Treble frequency level adjusting potentiometer TREBLE Middle frequency parametric equalizer potentiometer MID/FREQ 7.- Middle frequency level adjusting potentiometer MID/GAIN 8.- Bass frequency level adjusting potentiometer BASS 9.
5.3. BC-2522 DOUBLE LINE STEREO INPUT MODULE. 5.3.1. Functional description The Double Line Stereo Input Module BC-2522 permits the connection of two stereo inputs A and B. These lines are connected to (18) INPUT A (L) and (19) INPUT A (R) for the left and right Line A channels and (21) INPUT B (L) and (22) INPUT B (R) for the left and rigth Line B channels, selection is by switch (1) INPUT A/B. If the selector is at rest input A is active, when the selector is depressed input B is selected.
5.3.2. Description of Controls and Connectors. FRONT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1.- A/B Input selector switch INPUT A/B 2.- Mono/stereo selector switch ST/MONO 3.- Gain adjusting potentiometer GAIN 4.- Radiofrequency switch HFF 5.- Saturation level led indicator CLIP 6.- Send to auxiliary 1 bus potentiometer AUX. 1 7.- Send to auxiliary 2 bus potentiometer AUX. 2 8.- Balance level adjusting potentiometer BALANCE 9.- Balance activation switch BALANCE ON 10.
5.4. BC-2533 HYBRID TELEPHONE INPUT/OUTPUT MODULE. 5.4.1. Functional description The Hybrid Telephone Input/Output Module BC-2533 permits the adaptation of an external analogue or digital hybrid telephone to the other modules that make up the system. An audio input (20) INPUT FROM LINE is available for the signal from the external hybrid telephone at line level. This input can be monitored by activating the push-button PFL INPUT (16) the status is shown by the illumination of the PFL led. PFL INPUT (14).
Note: The BC-2533 module can be programmed for connection to telephone bus 1 or 2. This operation is performed during manufacturate. To alter this specification our Technical Service department should be consulted. It should be noted that two BC-2533 modules must never be connected to the same telephone bus.
5.4.2. Example of remote connection of the Hybrid AEQ TH-02 MKII BC-2533 TH-02 MKII REMOTE INPUT FROM LINE OUTPUT TO LINE REMOTE OUTPUT INPUT Module. Hybrid pin connector. 5.4.3. Example of remote connection of the Hybrid AEQ TH-12 Module BC-2533 TH-12 REMOTE RING 1 REMOTE AIR 1 INPUT FROM LINE OUTPUT TO LINE RING AIR OUTPUT INPUT Module. Hybrid pin connector. Note: The situation of P.D.P. (program bridges) varies according to the AEQ external hybrid model selected.
5.4.4. Description of Controls and Connectors. FRONT 1 2 3 4 5 6 7 8 9 1.- Output level adjusting potentiometer OUTPUT LEVEL 2.- Wait 1 switch WAIT 1 3.- Call on line 1 luminous indicator RING 4.- Line 1 “TO AIR” switch AIR 1 (line busy) 5.- Interconnection with a second BC-2533 switch MULTIPLEX 6.- Wait 2 switch WAIT 2 7.- Call on line 2 luminous indicator RING 8.- Line 2“TO AIR” switch AIR 2 9.- Send to auxiliary 1 bus potentiometer AUX.1 10.- Send to auxiliary 2 bus potentiometer AUX.2 11.
5.5. BC-2560-A STEREOPHONIC + SUM MONOPHONIC OUTPUT MODULE 5.5.1. Functional description The Stereophonic + Sum Monophonic BC-2560-A output module combines all the signal inputs it receives. The BC-2560-A can be programmed for connection to any of the output buses: Master 1, Master 2, Auxiliary 1 and Auxiliary 2. This operation is performed during manufacturate. To alter this specification consult section 7. It should be noted that two BC-2560-A/C modules must never be connected to the same bus.
5.5.2. Description of Controls and Connectors. FRONT 1.- Output level slide potentiometer FADER 2.- Mono line output connector MONO 3.- Left line output connector LEFT 4.
5.6. BC-2560-C STEREOPHONIC + SUM MONOPHONIC OUTPUT+INPUT BYPASS MODULE 5.6.1. Functional description The Stereophonic + Sum Monophonic + Input Bypass BC-2560-C output module performs the function of combining all the inputs signals assigned to it and a switch allows the signal or these signals combined, or and external input, to be sent to the output. The normal use of this module is Master 1 output.
5.6.2. Description of Controls and Connectors. FRONT 1.- Bypass input level potentiometer NETWORK LEVEL 2.- Bypass/Console selector BYPASS NETWORK 3.- Luminous bypass pre-listen indicator PFL NETWORK 4.- Pre-listen activation push-button PFL NETWORK 5.- Output level slide potentiometer FADER 6.- Mono line output connector MONO OUTPUT 7.- Left line output connector OUTPUT (L) 8.- Rigth line output connector OUTPUT (R) 9.- Left external input connector EXT INPUT (L) 10.
5.7. BC-2578 MONITORING, CONTROL AND SIGNALING MODULE. 5.7.1. Functional description The function of the Monitoring, Control and Signaling BC-2578 module is the monitoring of the studio and control, management of the command and intercom sends, control of the oscillator, input of time schedules and administration of the signal circuit. It also controls the VU-meters and pre-listen loudspeakers situated at the front of the chassis.
5.7.1.1.1. Description of Controls. FRONT 1.- Phantom power supply active luminous indicator PHANTOM 2.- Power supply active luminous indicator + ANALOG,-ANALOG 3.- Send to master 1 control monitor selector MASTER 1 4.- Send to master 2 control monitor selector MASTER 2 5.- Send to auxiliary 1 control monitor selector AUX.1 6.- Send to auxiliary 2 control monitor selector AUX.2 7.- Send to external input 1 control monitor selector EXT.1 8.- Send to external input 1 control monitor selector EXT.2 9.
5.7.1.2. Studio Monitor Block This unit controls the sends to the principal studio monitor outputs together with the primary and secondary headphone circuits. The following signals can be monitored: - Master 1, by selecting (1) MASTER 1 - Master 2, by selecting (2) MASTER 2 - Auxiliary 1, by selecting (3) AUX.1 - Auxiliary 2, by selecting (4) AUX.2 - External Input 1, by selecting (5) EXT.1 - External input 2, by selecting (6) EXT.
5.7.1.2.1. Description of controls. FRONT 1.2.3.4.5.6.7.8.- 1 2 3 4 Send to master 1 studio monitor selector MASTER 1 Send to master 2 studio monitor selector MASTER 2 Send to auxiliary 1 studio monitor selector AUX.1 Send to auxiliary 2 studio monitor selector 2 AUX.2 Send to external input 1 studio monitor selector EXT.1 Send to external input 2 studio monitor selector EXT.2 Send to pre-listen studio monitor selector PFL Principal studio monitor send level adjustment potentiometer MONITOR LEVEL 9.
5.7.1.3. Command, Intercom, Oscillator and Time-signal administration Block This block administers the command sends and intercom circuit returns, the oscillator circuit sends and the reception of time signal tones.
5.7.1.3.1. Description of Controls. 1.- Oscillator activation switch ON/OFF 2.- Oscillator send to master 1 switch MASTER 1 3.- Oscillator send to master 2 switch MASTER 2 4.- Oscillator send to auxiliary 1 switch AUX. 1 5.- Oscillator send to auxiliary 2 switch AUX. 2 6.- Oscillator send to teleph 1 switch PHONE 1 7.- Oscillator send to teleph 2 switch PHONE 2 8.- Commands send to master 1 switch MASTER 1 9.- Commands send to master 2 switch MASTER 2 10.- Commands send to auxiliary 1 switch AUX.1 11.
5.7.1.4. Signal, Studio and Control Monitor cut Administration Block This block administers the Control and Studio monitor cut and Signal circuits. There are two independents signal “ON AIR” circuits, Studio and Control that is activated when signals are received from programmed BC-2511, BC-2521 and BC-2522 input modules. The rear panel houses the connectors necessary to feed a direct 24-volt power supply, without external transformers or relays, to two luminous signaling circuits.
5.7.1.5. Remote functions Block. This module has the following remote functions: Remote Cut (REMOTE MUTE) and Remote Pre-listen (PFL REMOTE). The relevant connectors are situated in the rear connector I/O CONNECTOR Operational outline diagram of the Remote Cut and Remote Pre-listen circuit: Pin number of I/O CONECTOR BOOTH DESK 9V REMOTE CUT PUSH-BUTTON 5V 5V REMOTE PRE-LISTEN PUSH-BUTTON 0V When the Remote Cut push-button is activated all the programmed input channels are deactivated (see section 7.
5.7.2.Description of rear connectors.
5.8. BC-2523 EXTERNAL POWER SUPPLY MODULE. 5.8.1. Functional description. The external power supply module BC-2523 supplies the power required by the console functions and the signaling circuits (on air/off air). The following are situated on the module rear panel: The ON/OFF switch POWER (1), the power cable connector and fuseholder AC POWER (2), the signalling fuseholder FUSE (3), the voltage selector VOLTAGE SELECTOR (4) and the power output connector DC POWER SUPPLY OUTPUT (5).
5.9. BC-2501 CHASSIS AND METER PANEL MODULE. 5.9.1. Functional description The AEQ BC-2500 console is constructed on a metallic chassis with a capacity of 20 modules (BC-2501 FM or 24 modules (BC-2501) always occupy a minimum of 4 modules, being the minimum number necessary for console operation (modules BC-2578 & BC-2560). The chassis incorporates a panel housing the console pre-listen stereo loudspeakers and meters.
6. TECHNICAL SPECIFICATIONS 6.1 INPUTS 6.1.1. Microphone input. Transformer Balanced. Input Impedance: Input Range: Equivalent noise: Fader Range: 6.1.2. Line Input. Transformer Balanced. Input Impedance: Input Range: Fader Range: >3 Kohms -91 dBv Fader max, Master = 0 -17 dBv -122 dBv. 200 Ohms, 20 Hz-20 KHz -∞ / +12 dB >6K5 Ohms -34 dBv +25 dBv -∞ / +12 dB 6.1.3. Input/Output in BC-2511 Module.
Note: Master Output Level = + 4 dBv AEQ BC-2500 Radio Broadcast Mixing Desk 38
6.2 OUTPUTS 6.2.1. Master and Auxiliary Stereo Outputs. Output Impedance: < 75 Ohms Nominal Output Level: +4 dBv Maximum Output Level: + 18 dBv: D<0.2%, 30 Hz-20 KHz + 25 dBv: D<0.2%, 60 Hz-20 KHz + 27 dBv: D<0.2%, 72 Hz-20 KHz Band Width to 1.5 dB: 20 Hz-20 KHz Absolute Output noise: -70 dBm.20 Hz-20 KHz, Fader master max (all sends cut) -78 dBm.20 Hz-20 KHz, Fader master 0 (all sends cut) -95 dBm.20 Hz-20 KHz, Fader master -70 (all sends cut) 6.2.2. Control/Studio Monitor Outputs.
6.5. Dimensions 6.5.1. 20/24 Module chassis diagram. AEQ BC-2500 Mixer 20/24 module dimensional chassis diagram. (BC-2501FM/BC2501 of 20 or 24 modules, respectively. 310 485 65 310 800/956 590 834/990 Note: All measurements in millimetres.
7. CONFIGURATION PROGRAMMING BRIDGES WARNING All manipulation inside the equipment must be carried out only by qualified technical personnel. 7.1. BC-2511 programming bridges. FUNCTION P.D.P. position for function activation Activation of the signal circuit in LINE position .............:.................................. Deactivation of the signal circuit in LINE position ............................................... Send to AUX 1 POSTFADER:.......................... Send to AUX 1 PREFADER:..........
7.2. Position of the BC-2511 module programming bridges. P.D.P defect positions BC-2511 Module (I.C. board view) 1 P.D.P.1 Off P.D.P.2 On P.D.P.3 Off P.D.P.4 On P.D.P.5 Off P.D.P.6 Off P.D.P.7 On P.D.P.8 On P.D.P.9 On P.D.P.10 Off P.D.P.11/12-1C Off P.D.P.11/12-2C On P.D.P.11/12-3C Off P.D.P.
AEQ BC-2500 Radio Broadcast Mixing Desk 43
7.3. BC-2521/22 programming bridges. FUNCTION P.D.P. position for function activation Send to AUX 1L POSTFADER:......................... Send to AUX 1R POSTFADER:......................... Send to AUX 1L PREFADER:............................ Send to AUX 1R PREFADER:.…........................ Send to AUX 2L POSTFADER:...............…........ Send to AUX 2R POSTFADER:......................... Send to AUX 2L PREFADER:............................ Send to AUX 2L PREFADER:............................
7.4. Position of the BC-2521/22 module programming bridges P.D.P. defect positions BC-2521/22 Module (I.C. board view) P.D.P.1 On P.D.P.2 Off P.D.P.3 On P.D.P.4 Off P.D.P.5 On P.D.P.6 Off P.D.P.7 On P.D.P.8 Off P.D.P.9 Off P.D.P.10 Off P.D.P.11 Off P.D.P.12 Off P.D.P.13 On P.D.P.14 Off P.D.P.15 On P.D.P.16 Off P.D.P.17/18-1C Off P.D.P.17/18-2C On P.D.P.17/18-3C Off P.D.P.
AEQ BC-2500 Radio Broadcast Mixing Desk 46
7.5. BC-2560 A/C programming bridges. FUNCTION P.D.P. position for function activation Module programmed as output MASTER 1:.......P.D.P. 1,5,9,13,17,21,25,29,33,34 On. Module programmed as output MASTER 1 with BYPASS NETWORK option ...................... P.D.P. 1,5,9,13,17,21,25,29 On,33 and 34 Off. Module programmed as output MASTER 2:...... P.D.P. 2,6,10,14,18,22,26,30,33,34 On. Module programmed as output MASTER 2 with BYPASS NETWORK option...................... P.D.P.
7.6. Position of the BC-2560 A/C module programming bridges P.D.P. defect positons according to type of output selected BC-2560 A/C Module (I.C. board view.) 34,33 31,27,19,23 32,28,20,24 29,25,17,21 30,26,18,22 11,15,3,7 12,16,4,8 9,13,1,5 10,14,2,6 P.D.P.1 P.D.P.2 P.D.P.3 P.D.P.4 P.D.P.5 P.D.P.6 P.D.P.7 P.D.P.8 P.D.P.9 P.D.P.10 P.D.P.11 P.D.P.12 P.D.P.13 P.D.P.14 P.D.P.15 P.D.P.16 P.D.P.17 P.D.P.18 P.D.P.19 P.D.P.20 P.D.P.21 P.D.P.22 P.D.P.23 P.D.P.24 P.D.P.25 P.D.P.26 P.D.P.27 P.D.P.28 P.D.P.29 P.D.
7.7. BC-2533 programming bridges. FUNCTION P.D.P. position for function activation Send to AUX 1 POSTFADER:............................ Send to AUX 1 PREFADER:.............................. Send to AUX 2 POSTFADER:...................…...... Send to AUX 2 PREFADER:.............................. The send is activated when the switch CHANNEL ON and FADER are activated .:... P.D.P. 1 On & P.D.P. 2 P.D.P. 2 On & P.D.P. 1 P.D.P. 3 On & P.D.P. 4 P.D.P. 4 On & P.D.P. 3 Off Off Off Off P.D.P.
Note 1: Two BC-2533 modules must never be programmed together as PHONE 1. Note 2: Two BC-2533 modules must never be programmed together as PHONE 2.
7.8. Position of the BC-2533 module programming bridges P.D.P. defect positions according to type of output selected BC-2533 module (C.I. board view.) PHONE 1 P.D.P.1 P.D.P.2 P.D.P.3 P.D.P.4 P.D.P.5/6-2C P.D.P.7 P.D.P.8 P.D.P.9 P.D.P.10 P.D.P.11 P.D.P.12 P.D.P.13 P.D.P.14 P.D.P.15 P.D.P.
AEQ BC-2500 Radio Broadcast Mixing Desk 52
7.9. BC-2578 programming bridges FUNCTION P.D.P. position for function activation T’Back microphone send from T’Back selector to MASTER 1: T’Back microphone send from T’Back selector to MASTER 2:. T’Back microphone send from T’Back selector to AUXILIARY 1: T’Back microphone send from T’Back selector to AUXILIARY 2: P.D.P. 1,2,3 & 4. On. P.D.P. 5,6,7 & 8. On. P.D.P. 9,10,11 & 12. On. P.D.P. 13,14,15 & 16. On. Time-Top’s input signal send to MASTER 1 output :...............................................
AEQ BC-2500 Radio Broadcast Mixing Desk 54
7.10. Position of the BC-2578 module programming bridges BC-2578 module (I.C. board view) P.D.P. defect position P.D.P.1 On P.D.P.2 On P.D.P.3 On P.D.P.4 On P.D.P.5 On P.D.P.6 On P.D.P.7 On P.D.P.8 On P.D.P.9 On P.D.P.10 On P.D.P.11 On P.D.P.12 On P.D.P.13 On P.D.P.14 On P.D.P.15 On P.D.P.16 On P.D.P.17 On P.D.P.18 On P.D.P.19 On P.D.P.20 On P.D.P.21 Off P.D.P.22 Off P.D.P.23 Off P.D.P.24 Off P.D.P.25 Off P.D.P.26 Off P.D.P.27 Off P.D.P.28 Off P.D.P.29 Off P.D.P.30 Off P.D.P.31 Off P.D.P.32 Off P.D.P.
AEQ BC-2500 Radio Broadcast Mixing Desk 56
APPENDIX 1: AEQ WARRANTY AEQ guarantees that this product has been designed and manufactured under a certified Quality Assurance System and according to the ISO 9001/2002 Standard. AEQ therefore Guarantees that the necessary test protocols to assure the proper operation and the specified technical characteristics of the product have been followed and accomplished. This includes that the general protocols for design and production and the particular ones for this product are conveniently documented. 1.
