AAA-3131 User Manual (Revision 03)
Contents
1. Frequency Response Distortion Noise Attenuation mono mix mode Power requirements Voltage Power consumption Other Temperature range Dimensions Standard accessories 0 0 5 dB 20 Hz to 20 kHz lt 0 1 at 20 dBm 100 dB wrt 24 dBm 3 dB or 6 GB selectable by links 12 Vdc from main module See main module specifications 0 50 C ambient 65 mm x 48 mm Matching connector for control input type 1300 103 426 Due to our policy of continuing development these specifications are subject to change without notice IRT Electronics Pty Ltd www irtelectronics com Page 13 of 17 Revision 03 CAA 3130 AAA 3131 CONFIGURATION The main module must first be configured to accept the sub module This is achieved by various link settings as outlined in the main module manual The main module is normally delivered set for stereo operation and no sub modules fitted Before installing the CAA 3130 check that the main module is set to stereo mode as detailed in main module instruction manual INSTALLATION Module To install the sub module onto the main module first ensure that the proper mode of operation has been selected on both the main and sub modules Then remove straps LK 1 and LK 2 on the main module Hold the sub module so that the legends on the sub board and the legends on the main module have the same orientation Place the sub module over the connector pins of the main module The 16 pins fi2. Number Impedance Maximum output level Minimum output load DC on output Indicators Audio activity Performance Gain Frequency response Harmonic distortion Noise Crosstalk Left Right Amplifier Amplifier Power Requirements Voltage Power consumption Connectors Other Temperature range Mechanical Finish Front panel Rear assembly Dimensions Supplied accessories Transformerless balanced 2 L and R Bantam Jack lt 70Q 24 dBu into 600 Q 1 kQ lt 20 mV 2 front panel LED s set for 4 dBu 1 kHz user adjustable Internally linked to a maximum gain of 6 12 or 18 dB 0 0 3 dB for 20 Hz to 20 kHz lt 0 005 20 Hz to 20 kHz at 20 dBm 110 dB Ref 24 dBm 20 Hz to 20 kHz 75 dB 20 Hz to 20 kHz 80 dB 20 Hz to 20 kHz 28 Vac CT 14 0 14 or 16 Vdc lt 5 VA Phoenix pluggable screw block 0 50 C ambient Suitable for mounting in IRT 19 rack chassis with all connections at the rear Grey background black lettering amp red IRT logo Detachable silk screened PCB with direct mount connectors to Eurocard and external signals 6 HP x 3 Ux 220 mm IRT Eurocard Rear connector assembly with Phoenix pluggable compression screw terminals Matching connectors for audio inputs amp outputs supplied Due to our policy of continuing development these specifications are subject to change without notice IRT Electronics Pty Ltd www irtelectronics com Page 6 of
3. 17 Revision 03 AAA 3131 INTERNAL ADJUSTMENTS Factory settings The following adjustable resistors are factory set and should not be adjusted unless a component has been changed They are not operational controls Before adjusting any of these controls allow time for the AAA 3131 to reach temperature stability RV 1 Left Common Mode Rejection Adjusted to reduce input common mode signals to a minimum at the output of the AAA 3131 RV 2 Right Common Mode Rejection Adjusted to reduce input common mode signals to a minimum at the output of the AAA 3131 User settings Audio activity indicators RV 5 Left amp Right Level detector threshold Note that RV5 sets the threshold level for both channels Detector threshold point is measured at the output of the DA This setting may be adjusted to a value consistent with normal operating level Factory setting is 4 dBu 1 kHz Maximum gain Left channel LK 8 set as designated on PCB overlay for 6 12 or 18 dB max Right channel LK 7 set as designated on PCB overlay for 6 12 or 18 dB max See also Configuration and Installation sections following CONFIGURATION The AAA 3131 may be configured for several modes of operation including remote control and conversion to a multi output oscillator with the addition of sub modules This is achieved by various link settings as outlined below The AAA 3131 is normally delivered set for stereo operation 6 dB maximum gain on
4. both channels and no sub modules fitted Configuration Summary 1 Sub modules No sub module LK 1 amp LK 2 soldered on board Any sub module Cut LK 1 amp LK 2 on board CAA 3130 Set to stereo mode as below CAA 3132 Set to stereo mode as below AAO 3130 Set to stereo mode as below LK 7 amp LK 8 are inoperative 2 Stereo mono Stereo LK 3 amp LK 6 installed LK 4 not installed Mono L Input LK 3 amp LK 4 installed LK 6 not installed LK 8 sets maximum gain Gain adjust is only by RV 3 L gain LK 7 and RV 4 are inoperative Mono R Input LK 4 amp LK 6 installed LK 3 not installed LK 7 sets maximum gain Gain adjust is only by RV 4 R gain LK 8 and RV 3 are inoperative NOTE 1 Sub modules no longer available Reference for previous modules sold already in existence IRT Electronics Pty Ltd www irtelectronics com Page 7 of 17 Revision 03 AAA 3131 AAA 3131 Overlay amp Link Settings LKi1 R73 a5 a7 PR ai a3 T RUS LK3 aB _ R58 R59 U R23 R24 ma ma c3 R4 LK12 REO R61 al a1 eee R26 Sl 53 fre LEFT GAIN ia c14 Hates a 82 fe SS Rut ou m4 a an RAS a H cH sgg fe 2 N R45 RIGHT GAIN g ye ow 8 izal ga A ge B zg 44 88588388 538 Rs assada o gt R50 re 865 335 R52 S R53 s Hr kio ruaas H GE ca C 3 ll Tin Vl LJ Il AUDIO DISTSN AMP rs oes PS gl Ses STEREO 1
5. range specified Earthing The earth path is dependent on the type of frame selected In every case particular care should be taken to ensure that the frame is connected to earth for safety reasons See frame manual for details Signal earth For safety reasons a connection is made between signal earth and chassis earth No attempt should be made to break this connection Installation in frame or chassis See details in separate manual for selected frame type Audio Connections For mono operation it is usual to connect the input audio cable to the Left input pins For stereo connect the Left input cable to the Left input and the Right input audio cable to the Right input The input and output connectors are 3 way balanced Phoenix connectors Where an unbalanced connection is required the signal may be connected between either the input and GND or the input and GND On the input only the unused input pin should be connected directly to GND Do not ground the unused output pin as this will damage the amplifier IRT Electronics Pty Ltd www irtelectronics com Page 9 of 17 Revision 03 AAA 3131 Front amp rear panel connector diagrams Q AAA 3131 IRT L O GAIN R MONITOR REMANTE IRT Electronics Pty Ltd www irtelectronics com Page 10 of 17 Revision 03 AAO 3130 AAA 3131 FACTS STEREO OSCILLATOR SUB MODULE NOTE Obsolete No Longer Available Information for existing modules only GEN
6. AAA 3131 N s n In T ELECTRONICS User Manual IRT Electronics Pty Ltd www irtelectronics com Revision 03 STEREO AUDIO DISTRIBUTION AMPLIFIER Revision History AAA 3131 Revision Date By Change Description Applicable to 00 29 11 2006 AL Original Issue S N 2 0605001 01 05 01 2007 AL Overlay and link settings diagram added to S N 2 0605001 Configuration section 02 25 10 2010 AL Obsolescence of sub board information noted S N gt 0605001 03 25 05 2012 AL Reformatted layout S N gt 0605001 IRT Electronics Pty Ltd www irtelectronics com Page 2 of 17 Revision 03 USER MANUAL Table of Contents AAA 3131 Section Page Revision History 2 Operational Safety 4 General Description 5 Technical Specifications 6 Internal Adjustments 7 Configuration 7 AAA 3131 Overlay amp Link Settings 8 Installation 9 Front and rear layouts 10 Sub modules NOTE Obsolete No Longer Available Information for existing modules only 11 AAO 3130 FACTS Stereo Oscillator sub module 11 General Description 11 Technical Specifications 11 Configuration 12 Installation 12 Operation 12 CAA 3130 Remote Mode amp Phase Control sub module 13 General Description 13 Technical Specifications 13 Configuration 14 Installation 14 CAA 3132 Dual Remote Control sub module 15 General Description 15 Technical Specifications 15 Configuration 16 Inst
7. ERAL DESCRIPTION The AAO 3130 Four frequency switched stereo oscillator sub module converts the supporting main module audio distribution amplifier into a multi output reference stereo oscillator for test or alignment purposes Right channel can be set up for either pulsed interrupted every second or continuous operation This configuration conforms to the recommended practice of FACTS Federation of Australian Commercial Television Stations for channel identification Provision is made to remotely switch the frequency to a fixed 40 Hz 400 Hz 1 kHz or 10 kHz tone TECHNICAL SPECIFICATIONS Control input Remote switch component Single pole 4 position or equivalent not supplied Connections On rear assembly of main module 4 pin female polarised IDC 1300 104 Pin 1 GND 2 Relay 1 control 3 Relay 2 control 4 Relay 3 control Oscillator On Performance See main module specifications for other specifications Distortion lt 0 01 at 8 dBm Frequency Remote selectable to 40 Hz 400 Hz 1 kHz or 10 kHz Power requirements Voltage 12 Vdc from main module Power consumption See main module specifications Other Temperature range 0 50 C ambient Dimensions 65 mm x 48 mm Standard accessories Matching connector for control input type 1300 104 Due to our policy of continuing development these specifications are subject to change without notice IRT Electronics Pty Ltd www irtelectronics com Page 11
8. LK 3 6 oer E se MONO LEFT GAIN LK 3 4 g 8 ay 2 a 2l 3 3 MONO RIGHT GAIN LK 4 6 LK1 ASSY 805100 No sub module installed LK1 and LK2 soldered on board Any sub module installed Cut or remove LK1 and LK2 Stereo mode BB and GRGlinstalled KA hot installed Mono mode Left input LK3 and LK4 installed X lhot installed LK8 sets maximum gain Gain is adjusted by RV3 Left Gain LK7 and RV4 are inoperative Mono mode Right input MRi and MRGlinstalled LK3 not installed LK7 sets maximum gain Gain is adjusted by RV4 Right Gain LK8 and RV3 are inoperative LK LK10 LK11 Bypasses output fan resistors Only used with special non standard rear assembly not supplied IRT Electronics Pty Ltd www irtelectronics com Page 8 of 17 Revision 03 AAA 3131 INSTALLATION Pre installation Handling This equipment may contain or be connected to static sensitive devices and proper static free handling precautions should be observed Where individual circuit cards are stored they should be placed in antistatic bags Proper antistatic procedures should be followed when inserting or removing cards from these bags Power AC mains supply Ensure that operating voltage of unit and local supply voltage match and that correct rating fuse is installed for local supply DC supply Ensure that the correct polarity is observed and that DC supply voltage is maintained within the operating
9. allation 16 Maintenance amp Storage 17 Warranty amp Service 17 Equipment return 17 This instruction book applies to units later than S N gt 0605001 IRT Electronics Pty Ltd www irtelectronics com Page 3 of 17 Revision 03 AAA 3131 OPERATIONAL SAFETY WARNING Operation of electronic equipment involves the use of voltages and currents that may be dangerous to human life Note that under certain conditions dangerous potentials may exist in some circuits when power controls are in the OFF position Maintenance personnel should observe all safety regulations Do not make any adjustments inside equipment with power ON unless proper precautions are observed All internal adjustments should only be made by suitably qualified personnel All operational adjustments are available externally without the need for removing covers or use of extender cards IRT Electronics Pty Ltd www irtelectronics com Page 4 of 17 Revision 03 GENERAL DESCRIPTION AAA 3131 BLOCK DIAGRAM AAA 3131 SIGNAL PATH Analogue Audio I P L Balanced Analogue Audio I P R Do o Balanced O P s Balanced O P 1L O P 2L O P 3L O P 4L O P 5L O P 1R O P 2R O P 3R O P 4R O P 5R The IRT AAA 3131 is a high performance audio distribution amplifier that can be used for either mono or stereo signals Inputs and outputs are balanced connector types which can be wired for unbalanced operation if needed for duplic
10. ating applications Front panel access is provided for the gain adjustment of Left and Right channels from zero output to the maximum of the selected gain range LED s on the front panel indicate the presence of audio on each channel and balanced output bantam jacks are provided for front panel monitoring The AAA 3131 is fabricated in IRT s standard Eurocard format and may be housed in a variety of IRT Eurocard frames alongside other standard modules Applications Stereo signal duplication and distribution Level matching and balancing Standard features Selectable stereo or mono mode Balanced inputs and outputs Front panel monitoring bantam jacks LED audio activity indicators Front panel gain adjustments Selectable gain ranges 6 dB 12 dB amp 18 dB Maximum output level 24 dBu IRT Electronics Pty Ltd www irtelectronics com Page 5 of 17 Revision 03 TECHNICAL SPECIFICATIONS Inputs Left Mono and Right Type Impedance Maximum input level Input CMR Outputs Main Located on rear assembly Type Number Impedance Maximum output level Maximum output loading DC on output AAA 3131 Tranformerless balanced bridging gt 10 kQ 24 dBu 6 dB gain mode gt 55 dB 20 Hz to 20 kHz Transformerless balanced 10 10 mono or 5 Land 5 R lt 40Q 24 dBu into 600 Q 10 x 600 Q or up to 26 High Z lt 20 mV Monitoring Located on front panel Type
11. ed warranty period of three years from date of first delivery unless contrary conditions apply under a particular contract of supply For situations when No Fault Found for repairs a minimum charge of 1 hour s labour at IRT s current labour charge rate will apply whether the equipment is within the warranty period or not Equipment warranty is limited to faults attributable to defects in original design or manufacture Warranty on components shall be extended by IRT only to the extent obtainable from the component supplier Equipment return Before arranging service ensure that the fault is in the unit to be serviced and not in associated equipment If possible confirm this by substitution Before returning equipment contact should be made with IRT or your local agent to determine whether the equipment can be serviced in the field or should be returned for repair The equipment should be properly packed for return observing antistatic procedures The following information should accompany the unit to be returned A fault report should be included indicating the nature of the fault The operating conditions under which the fault initially occurred Any additional information which may be of assistance in fault location and remedy A contact name and telephone and fax numbers Details of payment method for items not covered by warranty Full return address For situations when No Fault Found for repairs a minimum charge
12. nection is made the oscillator will default to 400 Hz operation 1234 As the remote switches and wiring carry the full relay current it is important that the losses in the external wiring be kept to a minimum Connect to Pin 1 GND 2 Default N C 2 amp 3 3 IRT Electronics Pty Ltd www irtelectronics com Page 12 of 17 Revision 03 CAA 3130 AAA 3131 REMOTE MODE amp PHASE CONTROL SUB MODULE NOTE Obsolete No Longer Available Information for existing modules only GENERAL DESCRIPTION The CAA 3130 can remotely switch between mono and stereo modes or reverse the phase of the left channel in stereo mode Links on the board allow a choice of either a 3 dB or 6 dB mono mix Only one mode is possible at any time Normal stereo operation Reverse phase of left channel Switch left channel input to mono output Mix left and right channels to mono output with selectable 3 dB or 6 dB cut in signal level ey ake TECHNICAL SPECIFICATIONS Control input Remote gain component Connections Not supplied On rear assembly of main module 4 pin female polarised IDC 1300 103 426 Pin 1 GND 2 Relay 1 control 3 Relay 2 control 4 Relay 3 control Performance See main module specifications for other specifications Remote selectable Only one mode is possible at any time Stereo normal Invert left channel phase Mono output from left input Mix of stereo input to mono output Operation modes
13. ns Performance 10 kQ potentiometer Not supplied One required for each of the two functions On rear assembly of main module 4 pin female polarised IDC 1300 104 426 CCW connection of the potentiometers GND Rotor for first gain element CW connection of the potentiometers 1 kQ in series with 12 Vdc Rotor for second gain element See main module specifications for other specifications Frequency Response Harmonic Distortion Noise Attenuation Power requirements Voltage Power consumption Other Temperature range Dimensions Standard accessories 0 0 5 dB 20 Hz to 20 kHz lt 0 1 20 Hz to 20 kHz at 20 dBm 94 dB Ref 24 dBm 20 Hz to 20 kHz gt 75 dB Measurement for stereo fade mode 12 Vdc from main module See main module specifications 0 50 C ambient 65 mm x 48 mm Matching connector for control input type 1300 104 426 Due to our policy of continuing development these specifications are subject to change without notice IRT Electronics Pty Ltd www irtelectronics com Page 15 of 17 Revision 03 CAA 3132 AAA 3131 CONFIGURATION The main module must first be configured to accept the sub module This is achieved by various link settings as outlined in the main module manual The main module is normally delivered set for stereo operation and no sub modules fitted Before installing the CAA 3132 set the main module to stereo mode as detailed in main module instruc
14. of 1 hour s labour will apply whether the equipment is within the warranty period or not Contact IRT for current hourly rate NODWN Please note that all freight charges are the responsibility of the customer The equipment should be returned to the agent who originally supplied the equipment or where this is not possible to IRT directly Details of IRT s direct address can be found at IRT Electronics website Web address www irtelectronics com Email sales irtelectronics com IRT Electronics Pty Ltd www irtelectronics com Page 17 of 17 Revision 03
15. of 17 Revision 03 AAO 3130 AAA 3131 CONFIGURATION Before installing the AAO 3130 on the audio distribution amplifier main board cut the on board links LK1 and LK2 Ensure the main board is set for stereo operation as outlined in audio distribution amplifier main module section For pulsed tone on right channel on AAO 3130 sub board set link settings to LK1 closed and LK2 open For continuous tone on right channel on AAO 3130 sub board set link settings to LK1 open and LK2 closed Left channel always remains as a continuous tone INSTALLATION Module To install the sub module onto the main module first ensure that the proper mode of operation has been selected on both the main and sub modules Then remove straps LK 1 and LK 2 on the main module Hold the sub module so that the legends on the sub board and the legends on the main module have the same orientation Place the sub module over the connector pins of the main module The 16 pins fit into 16 holes in the sub module Push the sub board down until it rests on the orange insulation of the pins OPERATION Remote control of frequency To switch in the oscillator relay RL3 must be switched on This is done by connecting pins 1 and 4 on the 4 pin header on the rear connector of the main module s rear connector unit The frequency of the oscillator may be set using pins 2 and 3 connected to pin 1 of the remote connector on the rear assembly of the main module If no con
16. s Remote control To control the two gain elements two remote 10 kQ variable resistor should be wired between the pins of J3 on the main module rear assembly marked Remote 1 2 and 3 for the first element and 1 4 and 3 for the second element Connect Pin 1 to the bottom of both potentiometers CCW connection Pin 2 to the slider of the second element potentiometer rotor connection Trim Pin 3 to the top CW connection Pin 4 to the slider of the first element potentiometer rotor connection Balance IRT Electronics Pty Ltd www irtelectronics com Page 16 of 17 Revision 03 AAA 3131 MAINTENANCE amp STORAGE Maintenance No regular maintenance is required Care however should be taken to ensure that all connectors are kept clean and free from contamination of any kind This is especially important in fibre optic equipment where cleanliness of optical connections is critical to performance Storage If the equipment is not to be used for an extended period it is recommended the whole unit be placed in a sealed plastic bag to prevent dust contamination In areas of high humidity a suitably sized bag of silica gel should be included to deter corrosion Where individual circuit cards are stored they should be placed in antistatic bags Proper antistatic procedures should be followed when inserting or removing cards from these bags WARRANTY amp SERVICE Equipment is covered by a limit
17. t into 16 holes in the sub module Push the sub board down until it rests on the orange insulation of the pins Remote control CAA 3130 can be remotely switched to provide one of the following modes of operation Only one mode is possible at any time 1 Normal stereo operation 2 Reverse phase of left channel 3 Switch left channel input to mono output 4 Mix left and right channels to mono output with selectable 3 dB or 6 dB cut in signal level To control the operation mode a switch should be wired between the pins marked Remote 1 2 3 and 4 on the rear assembly Connect to Pin 1 GND Stereo Operation No connection Left Channel Phase Invert Left Channel Mono Right Channel Mono Stereo to Mono Mix 3 amp 4 Stereo to Mono Mix with L Phase reversal 2 amp 3 amp 4 IRT Electronics Pty Ltd www irtelectronics com Page 14 of 17 Revision 03 CAA 3132 AAA 3131 DUAL REMOTE CONTROL SUB MODULE NOTE Obsolete No Longer Available Information for existing modules only GENERAL DESCRIPTION This plug in option for selected IRT audio distribution amplifiers can be configured to provide any two of the following modes of operation STEREO FADE over 75 dB range STEREO TRIM of 6 dB CROSS FADE over 75 dB or 6 dB range MIX L R amp FADE both by up to 75 dB Only two modes of operation are possible at the same time TECHNICAL SPECIFICATIONS Control input Remote gain component Connectio
18. tion manual The CAA 3132 can be configured to provide any two of the following modes of operation 1 Stereo Fade Up to 75 dB attenuation on both channels simultaneously 2 Trim As above but range limited to 6 dB 3 Cross Fade Fade down left fade up right fade down right fade up left Up to 75 dB range 4 Balance As above but range limited to 6 dB 5 Mix L R amp Fade Add left to right and fade both by up to 75 dB To configure these options the following resistor values need to be in place RA RC RD RE RF RH RJ RK Stereo Fade 10k S C O C O C 10k S C O C O C Cross Fade 10k 10k O C O C 10k 10k 10k 10k Audio Over 10k 10k 33k O C 10k 10k 10k 10k Mix L R amp Fade 6k8 S C O C 6k8 10k 10k 10k O C Trim 10k 10k 22k O C 10k 10k 22k O C Balance 10k 10k 22k O C 22k 10k 10k O C INSTALLATION Module To install the sub module onto the main module first ensure that the proper mode of operation has been selected on both the main and sub modules Then remove straps LK 1 and LK 2 on the main module Hold the sub module so that the legends on the sub board and the legends on the main module have the same orientation Place the sub module over the connector pins of the main module The 16 pins fit into 16 holes in the sub module Push the sub board down until it rests on the orange insulation of the pin
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