Digital Redbox User Handbook RB-DDA6A 6 Way Stereo AES/EBU Digital Distribution Amplifier RB-DDA6S 6 Way S/PDIF Digital Distribution Amplifier RB-DDA6W 6 Way Word Clock Distribution Amplifier RB-ADDA Combined A/D and D/A Converter RB-DAC1 Digital to Analogue Converter RB-SC1 Sample Rate Converter RB-DHD6 Digital 6 Way Stereo Headphone Distribution Amplifier RB-DMA2 Dual Digital Microphone Amplifier RB-SP1 Digital Splitter & Combiner RB-DSS10 10 Way Stereo Digital Source Selector
Revision 1.8 November, 2003 ©Sonifex Ltd, 2000-3 All Rights Reserved Sonifex Ltd, 61, Station Road, Irthlingborough, Northants, NN9 5QE, England. Tel : +44 (0)1933 650 700 Fax : +44 (0)1933 650 726 Email : sales@sonifex.co.uk or technical.support@sonifex.co.uk Web : http://www.sonifex.co.uk Information in this document is subject to change without notice and does not represent a commitment on the part of Sonifex Ltd.
Contents Contents Warranty, Safety & Installation Information....................... i Warranty Information ..........................................................i Returning the Warranty Card ............................................... ii Safety of Mains Operated Redbox Equipment ........................ iii Preparing the Machine for Use .......................................... iii Equipment Safety ........................................................... iii Voltage Setting Checks.............
Contents 2.4.4. Physical Specifications ......................................... 2-4 3. RB-DDA6W 6 Way Word Clock Distribution Amplifier .. 3-1 3.1. Introduction............................................................. 3-1 3.2. System Block Diagram .............................................. 3-2 3.3. Rear Panel Connections and Operation ......................... 3-3 3.3.1. Word Clock Input ................................................ 3-3 3.3.2. Word Clock Outputs................................
Contents 5.4.2. RB-DAC1 Outputs................................................5-3 5.4.3. Rear Panel Controls .............................................5-4 5.5. Technical Specifications .............................................5-5 5.5.1. Connections........................................................5-5 5.5.2. Audio Specification ..............................................5-5 5.5.3. Operational Controls ............................................5-5 5.5.4. Equipment Type ....................
Contents 8. RB-DMA2 Dual Digital Microphone Amplifier ............... 8-1 8.1. Introduction............................................................. 8-1 8.2. System Block Diagram .............................................. 8-2 8.3. Front Panel Indicators & Controls ................................ 8-3 8.3.1. Sync & Power Indicator ........................................ 8-3 8.3.2. Input Level Adjustment ........................................ 8-3 8.3.3. Disabling the Fine Gain Control Knob .......
Contents 10.3.2. Illuminated Push Buttons .................................. 10-3 10.3.3. Headphone Output........................................... 10-3 10.3.4. Volume Control ............................................... 10-3 10.4. Rear Panel Connections and Operation ..................... 10-4 10.4.1. RB-DSS10 Inputs ............................................ 10-4 10.4.2. RB-DSS10 Outputs .......................................... 10-4 10.4.3. RB-DSS10 D-Type Connectors ...........................
Contents Figures Fig W-1: Mains lead table ................................................... iv Fig W-2: RB-RK1 (B) Small Redbox Front Rack-mount Kit ........ v Fig W-3: RB-RK2 Small Redbox Rear Rack-mount Kit .............. v Fig W-4: RB-RK3 Large Redbox Rear Rack-mount Kit .............. v Fig 1-1: RB-DDA6A Front Panel ......................................... 1-1 Fig 1-2: RB-DDA6A System Block Diagram ......................... 1-2 Fig 1-3: RB-DDA6A Rear Panel..........................................
Contents Fig 8-4: Jumpers to Disable Fine Gain Control .....................8-3 Fig 8-5: RB-DMA2 Rear Panel............................................8-4 Fig 8-6: RB-DMA2 Status Select Switches ...........................8-5 Fig 8-7: RB-DMA2 Frequency and Sync Rotary Switch Selections ....................................................................................8-7 Fig 9-1: RB-SP1 Front Panel .............................................9-1 Fig 9-2: RB-SP1 System Block Diagram ......................
Contents Redbox User Handbook
Warranty, Safety & Installation Information Warranty, Safety & Installation Information Warranty Information Warranty and Liability - important the purchaser is advised to read this clause.
Warranty, Safety & Installation Information (e) At the request and expense of the Purchaser the Company will test the Goods to ascertain performance levels and provide a report of the results of that test. The report will be accurate at the time of the test, to the best of the belief and Knowledge of the Company, and the Company accepts no liability in respect of its accuracy beyond that set out in Condition (a).
Warranty, Safety & Installation Information Safety of Mains Operated Redbox Equipment Preparing the Machine for Use Each Redbox is shipped in protective packaging and should be inspected for damage before use. Where an item is found to have transit damage, notify your supplier immediately with all the relevant details of the shipment. Packing materials should be kept for inspection.
Warranty, Safety & Installation Information Wire Colour Green, or green and yellow Blue, or Black Brown, or Red Connection Earth (E) Neutral (N) Live (L) Ordering the Correct Mains Lead When ordering a Redbox from Sonifex, it is helpful if you can specify your required operating voltage and mains lead.
Warranty, Safety & Installation Information Fitting Redboxes Redboxes can be fixed to the underside of a mixing desk, or other surfaces using 2 off No. 6 countersink screws. They can also be rack-mounted, with either the front, or rear of the Redbox positioned at the front of the rack: Front Mounting Redboxes: For rack mounting smaller (28cm) units the optional RB-RK1 (Red) or RB-RK1B (Black) kit can be used (which include 4 off M6 panel fixing screws).
Warranty, Safety & Installation Information Wherever you see this symbol an RB-RK1 front panel rack kit can be used for the following RB-UL1, RB-UL2, RB-BL2, RB-MA1, RB-MA2, RB-SM1, RB-SM2, RB-DDA6A, RBDDA6S, RB-DDA6W, RB-SC1, RB-SL2, RB-LC3, RB-LI2 Wherever you see this symbol an RB-RK2 back panel 19” rack ears kit can be used for the following RB-UL1, RB-UL2, RB-BL2, RB-MA1, RB-MA2, RB-SM1, RB-SM2, RB-DDA6A, RBDDA6S, RB-DDA6W, RB-SC1, RB-SL2, RB-LC3, RB-LI2 Wherever you see this symbol an RB-RK3 back p
Chapter 1 - RB-DDA6A 6 Way Stereo AES/EBU Digital Distribution Amplifier 1. RB-DDA6A 6 Way Stereo AES/EBU Digital Distribution Amplifier Fig 1-1: RB-DDA6A Front Panel 1.1. Introduction The RB-DDA6A 6 Way AES/EBU Digital Distribution Amplifier is used for distributing digital audio data in AES/EBU format. It has a single AES/EBU audio input, which is distributed to 6 outputs at the same level and condition as the input signal and can accept 24 bit, 96kHz signals.
Chapter 1 - RB-DDA6A AES/EBU 6 Way Stereo Digital Distribution Amplifier 1.2.
Chapter 1 - RB-DDA6A 6 Way Stereo AES/EBU Digital Distribution Amplifier 1.3. Rear Panel Connections and Operation 1.3.2 1.3.1 AES/EBU INPUT AES/EBU OUTPUT 1 2 3 4 5 Disconnect the mains supply before removing the equipment covers. 115V - 230V 6 This product must be earthed Fig 1-3: RB-DDA6A Rear Panel 1.3.1. AES/EBU Input The XLR 3 pin socket has an impedance of 110 ohms. It has the following connections: Pin 1: Screen Pin 2: Phase Pin 3: Non-phase 1.3.2.
Chapter 1 - RB-DDA6A AES/EBU 6 Way Stereo Digital Distribution Amplifier 1.4. Technical Specifications 1.4.1. Audio Specifications Input Impedance: Output Impedance: Sample Freq Range: Signal Level 110Ω ± 20% balanced 110Ω ± 20% balanced 30-100kHz (i.e. including 32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz and 96kHz) 3V/10V peak to peak min/max 1.4.2.
Chapter 2 - RB-DDA6S 6 Way Stereo S/PDIF Digital Distribution Amplifier 2. RB-DDA6S 6 Way Stereo S/PDIF Digital Distribution Amplifier Fig 2-1: RB-DDA6S Front Panel 2.1. Introduction The RB-DDA6S Digital Distribution Amplifier is used for distributing digital audio data in S/PDIF format. It has a single S/PDIF audio input, which is distributed to 6 outputs at the same level and condition as the input signal and can accept 24 bit, 96kHz signals.
Chapter 2 - RB-DDA6S 6 Way Stereo S/PDIF Digital Distribution Amplifier 2.2.
Chapter 2 - RB-DDA6S 6 Way Stereo S/PDIF Digital Distribution Amplifier 2.3. Rear Panel Connections and Operation 2.3.2 2.3.1 S/PDIF INPUT S/PDIF OUTPUT 1 2 3 4 5 6 115V - 230V Disconnect the mains supply before removing the equipment covers. This product must be earthed Fig 2-3: RB-DDA6S Rear Panel 2.3.1. S/PDIF Input The S/PDIF phono input has an impedance of 75 ohms. 2.3.2. S/PDIF Outputs The S/PDIF phono outputs have an impedance of 75 ohms.
Chapter 2 - RB-DDA6S 6 Way Stereo S/PDIF Digital Distribution Amplifier 2.4. Technical Specifications 2.4.1. Audio Specifications Input Impedance: Output Impedance: Sample Freq Range: Signal Level 75Ω ±5% unbalanced 75Ω ±5% unbalanced 30-100kHz (i.e. including 32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz and 96kHz) 0.5V ±20% peak to peak 2.4.2.
Chapter 3 - RB-DDA6W 6 Way Word Clock Distribution Amplifier 3. RB-DDA6W 6 Way Word Clock Distribution Amplifier Fig 3-1: RB-DDA6W Front Panel 3.1. Introduction The RB-DDA6W 6 Way Word Clock Distribution Amplifier distributes a word clock BNC input signal to 6 word clock BNC outputs re-conditioned. It is used in distributing reference clocks for digital audio systems. It has a single female BNC input which is distributed to 6 female BNC outputs.
Chapter 3 - RB-DDA6W 6 Way Word Clock Distribution Amplifier 3.2.
Chapter 3 - RB-DDA6W 6 Way Word Clock Distribution Amplifier 3.3. Rear Panel Connections and Operation 3.3.2 3.3.1 WORD CLOCK INPUT 115V - 230V Disconnect the mains supply before removing the equipment covers. This product must be earthed Fig 3-3: RB-DDA6W Rear Panel 3.3.1. Word Clock Input The Word Clock BNC input has an impedance of 75 ohms. 3.3.2. Word Clock Outputs The Word Clock BNC outputs have an impedance of <50 ohms.
Chapter 3 - RB-DDA6W 6 Way Word Clock Distribution Amplifier 3.4. Technical Specifications 3.4.1. Signal Specifications Input Impedance Output Impedance 75Ω <50Ω 3.4.2. Connections Input Outputs Mains Input 1 x BNC female 6 x BNC female Filtered IEC, 110-120V, or 220-240V switchable, fused 3.4.3. Equipment Type RB-DDA6W 6 Way word clock distribution amplifier 3.4.4. Physical Specifications Dimensions (Raw) Dimensions (Boxed) Weight 3-4 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 36cm (W) x 20.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter 4. RB-ADDA Combined A/D and D/A Converter 4.1. Introduction RB-ADDA COMBINED A/D AND D/A CONVERTER Fig 4-1: RB-ADDA Front Panel Using 24 bit, 96kHz capable devices, the RB-ADDA A/D and D/A Converter is a 1U rack-mount which produces an AES/EBU or S/PDIF level digital audio output from a balanced XLR or unbalanced phono stereo audio input.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter The analogue inputs have left and right level controls using pre-set potentiometers and DIP switches allowing a signal range from +9dBu to +27dBu. The analogue outputs have an output level control, allowing full-scale settings selectable from +12dBu, +18dBu or +24dBu. There are factory-set internal level controls for the analogue outputs allowing gain adjustment of ±1dB.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter 4.4. Rear Panel Connections and Operation Fig 4-3: RB-ADDA Rear Panel 4.4.1. RB-ADDA Inputs 4.4.1.1. XLR Analogue Inputs (Left and Right) The XLR 3 pin sockets used for the left and right channel inputs are electronically balanced and have an impedance of greater than 10kΩ bridging. Each XLR has the following connections: Pin 1: Screen. Pin 2: Phase. Pin 3: Non-phase. 4.4.1.2.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter 4.4.1.5. S/PDIF Inputs The S/PDIF digital phono inputs have an impedance of 75 Ω. 4.4.2. RB-ADDA Outputs 4.4.2.1. Analogue Outputs (Left and Right) The XLR 3 pin output plug connectors are electronically balanced with an output impedance of less than 50 Ω. They have the following connections: Pin 1: Screen. Pin 2: Phase. Pin 3: Non-phase. 4.4.2.2.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter 4.4.3. Rear Panel Controls 4.4.3.1. Full Scale dB Settings The full-scale dB settings can be set for signals of +12, +18, +24 dBu to give fullscale digits in the digital domain. Fig 4-4: RB-ADDA Full Scale dB Settings 4.4.3.2. Status Select Switches These switches are used to determine the status or content of the digital signals.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter 4.4.3.3. Digital Select Buttons These buttons are used to switch the digital connection between the AES/EBU XLR connector (button out) and the S/PDIF phono connector (button in) for the digital input and the digital output. 4.4.3.4. Analogue Select Button This button is used to switch the Analogue input between the balanced XLR connector (button out) and the unbalanced phono connector (button in). 4.4.3.5.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter 4.4.3.6. Test/Calibration Mode For optimum performance of the RB-ADDA, the unit should be calibrated when it has been powered up for approximately 10-15 minutes. The circuitry and chipsets contained in the unit will warm up during this time and the performance will deteriorate unless calibrated (the noise floor and dynamic range will be 1-2dB down on their best). The calibration cycle calibrates the gain and the zero reference of the A/D converter.
Chapter 4 - RB-ADDA Combined A/D and D/A Converter 4.5.5. Other Connections Mains Input: Filtered IEC, 110-120V, or 220-240V switchable, fused 10W max 4.5.6.
Chapter 5 - RB-DAC1 Digital to Analogue Converter 5. RB-DAC1 Digital to Analogue Converter RB-DAC1 HEADPHONE VOLUME DIGITAL - ANALOG CONVERTER Fig 5-1: RB-DAC1 Front Panel 5.1. Introduction Using 24 bit, 96kHz capable devices, the RB-DAC1 Digital to Analogue Converter is a 1U rack-mount which produces a stereo balanced XLR or unbalanced phono output from an incoming AES/EBU or S/PDIF digital input signal. There is also a headphone output for monitoring purposes.
Chapter 5 - RB-DAC1 Digital to Analogue Converter 5.2. System Block Diagram Volume Control AES/EBU Stereo Headphone Output Digital Source Selector Digital Input AES Receiver L DAC R S/PDIF XLR Professional Balanced Output Analogue Outputs L Phono Consumer Unbalanced Output R Fig 5-2: RB-DAC1 System Block Diagram 5.3. Front Panel Indicators & Controls 5.3.1 RB-DAC1 HEADPHONE VOLUME DIGITAL - ANALOG CONVERTER 5.3.3 Fig 5-3: RB-DAC1 Front Panel 5.3.1.
Chapter 5 - RB-DAC1 Digital to Analogue Converter 5.4. Rear Panel Connections and Operation 5.4.3.2 5.4.3.1 5.4.3.3 AES/EBU INPUT ANALOGUE OUTPUTS L FULL SCALE dB SETTINGS 5.4.2.2 S/PDIF AES/EBU S/PDIF INPUT R LEFT RIGHT Disconnect the mains supply before removing the equipment covers. 5.4.2.1 INPUT SELECT This product must be earthed 5.4.1.1 5.4.1.2 Fig 5-4: RB-DAC1 Rear Panel 5.4.1. RB-DAC1 Inputs 5.4.1.1. AES/EBU Input The digital input XLR 3 pin socket has an impedance of 110 Ω.
Chapter 5 - RB-DAC1 Digital to Analogue Converter 5.4.3. Rear Panel Controls 1 2 3 3 4 FULL SCALE dB SETTINGS +12 +18 +24 OFF ON ON OFF OFF ON STATUS DE-EMPHASIS ON ON OFF DE-EMPHASIS OFF RESERVED Fig 5-5: RB-DAC1 Status & Output Select Switches 5.4.3.1. Output Level Adjustment The output gain can be adjusted by dipswitches on the rear panel. The output gain can be set for a signal of full-scale digits in the digital domain to give +12, +18 or +24dBu output on the XLR connectors.
Chapter 5 - RB-DAC1 Digital to Analogue Converter 5.5. Technical Specifications 5.5.1. Connections Digital Inputs: 1 x AES/EBU XLR 3 pin female 1 x S/PDIF RCA phono Analogue Outputs: 2 x XLR 3 pin male (balanced) (L & R) 2 x RCA phono (unbalanced) (L & R) Headphone Output: 1 x ¼” (6.35mm) A/B gauge 3-pole stereo jack socket Mains Input: Filtered IEC, 110-120V, or 220-240V switchable, fused 10W max 5.5.2.
Chapter 5 - RB-DAC1 Digital to Analogue Converter 5-6 Redbox User Handbook
Chapter 6 - RB-SC1 Sample Rate Converter 6. RB-SC1 Sample Rate Converter Fig 6-1: RB-SC1 Front Panel 6.1. Introduction The RB-SC1 Sample Rate Converter standardises the sample rate of a digital audio signal to one of 32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz, or 96kHz, or to a synchronising input, selectable from AES/EBU, S/PDIF or TTL Word Clock. Both inputs and outputs can be selected as either AES/EBU or S/PDIF with the resultant digital level following the switch selection.
Chapter 6 - RB-SC1 Sample Rate Converter 6.2. System Block Diagram Digital Digital Source Input Select AES/EBU Digital Send Select AES Receiver Sample Rate Converter Digital Output AES/EBU AES Transmitter SPDIF SPDIF Conversion Clock Digital Sync Digital Sync Input Select AES/EBU Clock SPDIF AES Receiver Master Clock Generator Word Clock Frequency Select Fig 6-2: RB-SC1 System Block Diagram 6.3. Front Panel Indicators 6.3.1.
Chapter 6 - RB-SC1 Sample Rate Converter 6.4. Rear Panel Connections and Operation 6.4.2.1 6.4.1.1 6.4.1.2 AES/EBU INPUT S/PDIF INPUT AES/EBU OUTPUT AES/EBU INPUT FREQUENCIES AND SYNC MODES S/PDIF S/PDIF STATUS 6.4.2.3 AES/EBU AES/EBU WORD S/PDIF CLOCK SYNC INPUTS OUTPUT SELECT Disconnect the mains supply before removing the equipment covers. This product must be earthed 6.4.1.4 6.4.1.3 6.4.2.2 6.4.1.5 Fig 6-3: RB-SC1 Rear Panel 6.4.1. Inputs and Outputs 6.4.1.1.
Chapter 6 - RB-SC1 Sample Rate Converter 6.4.1.5. S/PDIF Output The digital output S/PDIF phono output has an impedance of 75 ohms. 6.4.2. Rear Panel Controls 6.4.2.1. Status Select Switches These switches are used to determine the content of the channel status bits embedded within the digital audio stream (switches 1 and 2) and to select the source for the digital sync signal from either digital audio input or TTL word clock (switch3).
Chapter 6 - RB-SC1 Sample Rate Converter If the sync signal is removed then the output sample rate will be set by, and locked to, the internal on-board clock generator at the closest frequency available to the previous sync input. In Slave sync mode, switch position D, the digital output sample rate follows the sync input. When the sync signal is not present the digital output is turned off. FREQUENCIES AND SYNC MODES kHz MASTER 32 44.1 0 1 2 3 4 5 AUTO 6 7 8 9 A B AUTO LOCK = C 48 64 88.
Chapter 6 - RB-SC1 Sample Rate Converter 6.5. Technical Specifications 6.5.1. Audio Specification Dynamic Range: Distortion & Noise: Sample Freq Range: Bit Depth: 120dB -114dB THD + N at 1kHz, ref 0dB FS 30kHz – 100kHz Up to and including 24 bits. 6.5.2.
Chapter 7 - RB-DHD6 Digital 6 Way Stereo Headphone Distribution Amplifier 7. RB-DHD6 Digital 6 Way Headphone Distribution Amplifier 1 2 3 4 5 6 Fig 7-1: RB-DHD6 Front Panel 7.1. Introduction The RB-DHD6 digital 6 way headphone distribution amplifier is a 1U rack-mount which receives a digital input signal, as either AES/EBU or S/PDIF and converts it to 6 individually buffered, jack-plug, headphone outputs, each with their own volume control.
Chapter 7 - RB-DHD6 Digital 6 Way Stereo Headphone Distribution Amplifier 7.2. System Block Diagram Volume Control AES/EBU Digital Input AES Receiver Audio Output Amp DAC Stereo Jack Output S/PDIF X6 Fig 7-2: RB-DHD6 System Block Diagram 7.3. Front Panel Indicators & Controls 1 2 3 4 5 6 Fig 7-3: RB-DHD6 System Block Diagram 7.3.1. Sync & Power Indicator The LED on the front panel is normally red to indicate that power is present on the unit.
Chapter 7 - RB-DHD6 Digital 6 Way Stereo Headphone Distribution Amplifier 7.4. Rear Panel Connections and Operation AES/EBU INPUT S/PDIF STATUS Disconnect the mains supply before removing the equipment covers. AES/EBU S/PDIF INPUT INPUT SELECT This product must be earthed Fig 7-4: RB-DHD6 Rear Panel 7.4.1. RB-DHD6 Inputs 7.4.1.1. AES/EBU Input The digital input XLR 3 pin socket has an impedance of 110 Ω.
Chapter 7 - RB-DHD6 Digital 6 Way Stereo Headphone Distribution Amplifier 7.4.2.1. Status Select Switches If de-emphasis is on (switch 1) the RB-DHD6 will decode 50/15µs emphasis when indicated by certain channel status bits in the incoming digital audio data. When off, no de-emphasis is applied. 7.4.2.2. Digital Select Button This button is used to switch the digital input between the AES/EBU XLR connector (button out) and the S/PDIF phono connector (button in). 7.5. Technical Specifications 7.5.1.
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier 8. RB-DMA2 Dual Digital Microphone Amplifier LEVEL 2 LEVEL 1 RB-DMA2 DIGITAL MICROPHONE AMPLIFIER + + Fig 8-1: RB-DMA2 Front Panel 8.1. Introduction The RB-DMA2 consists of two independent low-noise microphone pre-amplifiers for converting microphone level signals to digital AES/EBU, or S/PDIF, and analogue line level outputs. The RB-DMA2 can be used as a front end for digital mixing desks or routers, which do not have microphone inputs.
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier Auto Lock Mode - This operates like the auto mode except that if no sync-input signal is detected, it will use the internal master clock to sync to the sample rate which was last clocked to. When operating in sync modes, the front panel power LED flashes whenever the unit is not synchronised to the incoming digital signal, or when the unit is being calibrated. The unit should be calibrated once it has been powered up for more than 10 minutes.
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier 8.3. Front Panel Indicators & Controls LEVEL 2 LEVEL 1 RB-DMA2 DIGITAL MICROPHONE AMPLIFIER + 8.3.2 8.3.1 + 8.3.4 Fig 8-3: RB-DMA2 Front Panel 8.3.1. Sync & Power Indicator The LED on the front panel is normally red to indicate that power is present on the unit.
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier 8.3.4. Input Level Indicators For each input there is a tri-colour LED to give an indication of the level of the incoming mic signals. Green indicates -18dBFS, orange indicates -12dBFS and red indicates -6dBFS. 8.4. Rear Panel Connections and Operation 8.4.1.1 INPUT 1 INPUT 2 PHANTOM POWER 8.4.2.3 8.4.2.1 8.4.1.4 8.4.1.2 OUTPUT 1 AES/EBU OUTPUT S/PDIF INPUT AES/EBU INPUT OUTPUT 2 INPUT 1 INPUT 2 INPUT 1 LF FILTER INPUT 2 LF FILTER 8.4.3.
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier 8.4.2. RB-DMA2 Outputs 8.4.2.1. AES/EBU Output The digital output XLR 3 pin socket has an impedance of 110Ω and the signals on this connector comply with the IEC 60968 specification. It has the following connections : Pin 1: Screen Pin 2: Phase Pin 3: Non-phase 8.4.2.2. S/PDIF Output The digital output S/PDIF phono output has an impedance of 75Ω. 8.4.2.3. Analogue Line Outputs There is an analogue output on XLR 3 pin plug for each microphone input.
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier 8.4.3.2. Output Routing This uses switch 2 of the STATUS dipswitch block. When switch 2 is “ON”, the audio signal from Mic input 1 is copied to both channels of the digital output signal (channel B = channel A) and Mic input 2 is ignored (Dual mono mode). When “OFF”, the Mic input 1 signal is on channel A only of the digital output signal and channel B contains the Mic input 2 signal (Mono mode).
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier • In Slave Sync Mode, switch position D, the digital output sample rate follows the digital input. When the digital input signal is not present the digital output is turned off. The following table, also printed on the top of the unit, summarises the above settings and shows the sample rate generated by the internal clock generator in master and auto sync modes. kHz MASTER AUTO 32 0 6 AUTO LOCK = C FREQUENCIES AND SYNC MODES 44.1 48 64 88.
Chapter 8 - RB-DMA2 Dual Digital Microphone Amplifier 8.5.2. Audio Specification Min/Max Input Level: Input Impedance: Gain Range: Signal to Noise: Dynamic Range: Distortion and Noise: Phantom Power: Low Frequency Roll-off: Analogue Output Level: -63dBu / 5dBu to give FSD 2kΩ nominal balanced 68dB 128dB EIN >110dB < 0.01% THD + N absolute @ 1kHz +48V 125Hz @ 6dB/octave +18dBu Ref. FSD 8.5.3.
Chapter 9 - RB-SP1 Digital Splitter & Combiner 9. RB-SP1 Digital Splitter & Combiner 9.1. Introduction RB-SP1 DIG IT AL SP LITTE R COMBINE R TYPE SPLIT 96 MODE STEREO MONO SPLIT 96/48kHz BYPASS COMBINE 88.2/44.1kHz 32kHz Fig 9-1: RB-SP1 Front Panel The RB-SP1 Digital Splitter & Combiner is used to interface various double sampling pieces of equipment.
Chapter 9 - RB-SP1 Digital Splitter & Combiner 9.2. System Block Diagram Fig 9-2: RB-SP1 System Block Diagram 9.3. Front Panel Indicators & Controls MODE TYPE SPLIT 96 STEREO MONO 96/48kHz BYPASS SPLIT COMBINE 88.2/44.1kHz 32kHz Fig 9-3: RB-SP1 Front Panel 9.3.1. Front Panel LED’s There are four LED indicators situated on the front of the unit. The red LED on the far left of the front panel is to indicate that power is present on the unit.
Chapter 9 - RB-SP1 Digital Splitter & Combiner 9.3.2. Type & Mode Switches The Type and Mode switches are on the front panel – see Fig 5-3. The Type switch sets the unit into either the Split 96 or Stereo/Mono style of operation. The Mode switch sets the unit into Split, Bypass or Combine mode. See Figure 5-4 for diagrammatic explanations of the different types and modes available. Split 96 – This is a method that allows older equipment to handle 48kHz double sampled (96kHz) digital signals.
Chapter 9 - RB-SP1 Digital Splitter & Combiner Split 96 Split L R 96kHz O/P 1 L L 48kHz double sampled O/P 2 R R 48kHz double sampled O/P 1 L R 96kHz O/P 1 L Mute L L O/P 2 R Mute Mute R I/P 1 Combine 48kHz double sampled 48kHz double sampled L L I/P 1 R R I/P 2 L R I/P 1 SRC Stereo/Mono Split Any Sample Rate Dipswitch 1 Off Combine Sample Rate 1 Sample Rate 2 X I/P 1 X R O/P 1 I/P 2 X R Dipswitch 1 On L Dipswitch 1 On L Sample Rate 1 R SRC X Dipswitch 1 Off Bypass
Chapter 9 - RB-SP1 Digital Splitter & Combiner 9.4. Rear Panel Connections and Operation 9.4.2.1 9.4.2.2 1 AES/EBU S/PDIF 2 S/PDIF 1 1 AES/EBU 2 S/PDIF MODE SELECT AES/EBU AES/EBU 2 INPUTS OUTPUTS Disconnect the mains supply before removing the equipment covers. 9.4.1.2 This product must be earthed 9.4.1.4 9.4.1.3 Fig 9-5: RB-SP1 Rear Panel 9.4.1. Inputs and Outputs 9.4.1.1. AES/EBU Inputs The digital source XLR 3 pin sockets have an impedance of 110Ω.
Chapter 9 - RB-SP1 Digital Splitter & Combiner 9.4.2. Rear Panel Controls 9.4.2.1. Digital Input & Output Select Buttons These buttons are used to switch the digital connection between the AES/EBU XLR connector (button out) and the S/PDIF phono connector (button in) for the digital source and digital output. 9.4.2.2.
Chapter 9 - RB-SP1 Digital Splitter & Combiner 9.5. Technical Specifications 9.5.1. Audio Specifications Input Impedance: Input Impedance: Output Impedance: Output Impedance: Signal Level 110Ω ± 20% balanced (AES/EBU) 75Ω ±5% unbalanced (S/PDIF) 110Ω ± 20% balanced (AES/EBU) 75Ω ±5% unbalanced (S/PDIF) 3V/10V peak to peak min/max (AES/EBU) 0.5V ±20% peak to peak (S/PDIF) Sample Freq Range: 30-100kHz (i.e. including 32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz and 96kHz) 9.5.2.
Chapter 9 - RB-SP1 Digital Splitter & Combiner 9-8 Redbox User Handbook
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10. RB-DSS10 10 Way Stereo Digital Source Selector 10.1. Introduction Fig 10-1: RB-DSS10 Front Panel The RB-SS10 10 Way stereo Digital Source Selector is a 1U rack-mount which produces an AES/EBU and S/PDIF level digital audio output from 10 selectable AES/EBU or S/PDIF digital input signals. There are 10 illuminated front panel push buttons, which select and indicate the current channel selection.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.2.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.3. Front Panel Indicators & Controls 1 2 3 4 5 6 7 8 9 10 HEADPHONES RB-DSS10 LEVEL DIGITAL SOURCE SELECT 10.3.1 10.3.2 10.3.3 10.3.4 Fig 10-3: RB-DSS10 Front Panel 10.3.1. Power Indicator The LED on the front panel is used to indicate that power is present on the unit. However, it also has a secondary role to indicate whether the selected channel is routing the AES/EBU or S/PDIF input: Red indicates AES/EBU input.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.4. Rear Panel Connections and Operation 10.4.3.2 10.4.1.1 10.4.3.1 10.4.3.3 10.4.2.1 10.4.3.4 Fig 10-4: RB-DSS10 Rear Panel 10.4.1. RB-DSS10 Inputs 10.4.1.1. AES/EBU Inputs The 8 digital input XLR 3 pin sockets have an impedance of 110 Ω. They have the following connections: Pin 1: Screen Pin 2: Phase Pin 3: Non-phase The signals on this connector should meet the IEC 60968 specification 10.4.2. RB-DSS10 Outputs 10.4.2.1.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.4.3. RB-DSS10 D-Type Connectors 10.4.3.1. Digital Audio Inputs & S/PDIF Output This connector contains the other two remaining professional AES/EBU input connections, and the 10 S/PDIF input connections. It also has the S/PDIF digital output. The S/PDIF digital inputs and the output have an impedance of 75 Ω. Pin No.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.4.3.2. Remote Start I/O This 25 way D-type plug (male) connector contains the remote start input connection and the corresponding 10 opto-isolated remote start outputs. Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin Pin No.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.4.3.3. Remote Select/Switch Inputs This 25 way D-type socket (female) connector contains the front panel inhibit input connection and the remote switch inputs to control the channel selection. Pin No.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.4.3.4. Status Outputs This 25 way D-type socket (female) connector contains the remote status tallies. Pin No.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10.5. Technical Specifications 10.5.1. Audio Specifications Input Impedance: Input Impedance: Output Impedance: Output Impedance: Signal Level 110Ω ±20% balanced (AES/EBU) 75Ω ±5% unbalanced (S/PDIF) 110Ω ±20% balanced (AES/EBU) 75Ω ±5% unbalanced (S/PDIF) 3V/10V peak to peak min/max (AES/EBU) 0.5V ±20% peak to peak (S/PDIF) Sample Freq Range: 30-100kHz (i.e. including 32kHz, 44.1kHz, 48kHz, 64kHz, 88.
Chapter 10 - RB-DSS10 10 Way Stereo Digital Source Selector 10-10 Redbox User Handbook
Chapter 11 - Glossary 11. Glossary 1kHz ADSL 1000Hz or 1 kilohertz Tone of 1kHz is often used for line-up and testing. Asynchronous Digital Subscriber Link - a broadband delivery system over standard telephone lines (between the exchange and the user). AES Audio Engineering Society. AES/EBU Professional digital audio standard covering frame format, connections and interfaces. Interface is usually on XLR sockets and plugs.
Chapter 11 - Glossary DAT dB (decibel) DCF DDS & DI DLS DSP EBU EIN ENG EON EQ FM G3 Gain GRAM HDLC Hybrid IEC ISDN Kbps kHz 11-2 Digital Audio Tape. A ratio of two voltages or signal levels, expressed by the equation dB=20LOG(V1/V2) Adding the suffix "u" denotes that the signal is relative to 0.775V RMS. Adding the suffix "v" denotes that the signal is relative to 1V RMS.
Chapter 11 - Glossary LAN Local Area Network - scheme where several computers on the same premises are connected together so that they can exchange data. LCD Liquid Crystal Display (grey displays e.g. on calculators). LED Light Emitting Diode (small lights e.g. on computers). LNB Low Noise Block - the RF amplifier attached to a satellite dish. MCR See racks room. MDU Mains Distribution Unit - a panel of mains outlets for power distribution.
Chapter 11 - Glossary and transmitter status monitoring and logging equipment (or the transmitter itself !) are stored here with limited access. RDS Radio Data System. Reverb An echo (in very basic terms). RF Radio Frequency. RJ-45 A connection standard used in computer networking. S/PDIF Sony/Phillips Digital Interface. Domestic digital audio interface standard using phono connectors or optically using fibre-optic connectors. SPL Sound Pressure Level.
Chapter 12 - Connectors and Cabling 12. Connectors And Cabling Many of the problems associated with installing and maintaining studio equipment are due to the use of poor cables or faulty connections. It is recommended that, wherever possible, pre-wired cables are purchased from recommended manufacturers. If you need bespoke cables making, please ensure that the work is carried out by a qualified engineer. The type of connectors used with the Redboxes are the following: 12.1.
Chapter 12 - Connectors and Cabling 12.3. ¼” Jack Connector The following diagram shows the connection details for the jack connector : 1/4" 'A' Gauge Stereo Jack Plug Tip - Hot ( In Phase ) Signal Ring - Cold ( Out Of Phase ) Signal Sleeve - Ground ( Screen ) Signal 1/4" 'A' Gauge Stereo Jack Plug used for Headphones Tip - Left Signal Ring - Right Signal Sleeve - Ground ( Screen ) Signal Fig 12-3: ¼” Jack Connector 12.4.
Chapter 12 - Connectors and Cabling 12.5.
Chapter 12 - Connectors and Cabling 12-4 Redbox User Handbook
Index Index A AES/EBU Inputs RB-ADDA, 4-3 RB-DAC1, 5-3 RB-DDA6A, 1-3 RB-DDA6S, 2-3 RB-DHD6, 7-3 RB-DMA2, 8-4 RB-SC1, 6-3 RB-SP1, 9-5 AES/EBU Outputs RB-ADDA, 4-4 RB-DDA6A, 1-3 RB-DDA6S, 2-3 RB-DMA2, 8-5 RB-DSS10, 10-4 RB-SC1, 6-3 RB-SP1, 9-5 Analogue Outputs RB-ADDA, 4-4 RB-DAC1, 5-3 RB-DMA2, 8-5 Analogue Select RB-ADDA, 4-6 Audio Specification RB-SC1, 6-6 Auto sync mode RB-ADDA, 4-6 RB-DMA2, 8-7 RB-SC1, 6-4 Auto-Lock sync mode RB-ADDA, 4-6 RB-DMA2, 8-7 RB-SC1, 6-5 B Bit Rate Select RB-ADDA, 4-5 RB-DMA2,
Index RB-DAC1, 5-2 RB-DHD6, 7-2 RB-DMA2, 8-3 RB-DSS10, 10-3 RB-SP1, 9-2 Front Panel LED RB-ADDA, 4-2 RB-SC1, 6-2 G Gain RB-ADDA, 4-3, 4-4 RB-DAC1, 5-4 I Impedances RB-DDA6A, 1-4 RB-DDA6S, 2-4 RB-DDA6W, 3-4 RB-DHD6, 7-4 RB-DSS10, 10-9 RB-SP1, 9-7 Input Gain RB-ADDA, 4-3 Input Level Adjustment RB-ADDA, 4-3 Input Level Indicators RB-DMA2, 8-4 Inputs RB-ADDA, 4-3 RB-DMA2, 8-4 RB-DSS10, 10-4 Introduction RB-ADDA, 4-1 RB-DAC1, 5-1 RB-DDA6A, 1-1 RB-DDA6S, 2-1 RB-DDA6W, 3-1 RB-DHD6, 7-1 RB-DMA2, 8-1 RB-DSS10, 10-
Index Phantom Power Mic Operating RB-DMA2, 8-6 Physical Specifications RB-ADDA, 4-8 RB-DAC, 5-5 RB-DDA6A, 1-4 RB-DDA6S, 2-4 RB-DDA6W, 3-4 RB-DHD6, 7-4 RB-DMA2, 8-9 RB-DSS10, 10-9 RB-SC1, 6-6 RB-SP1, 9-7 Power Connection, iii Professional status bits RB-SC1, 6-4 R RCA Phono Connectors, 12-1 RCA Phono Inputs RB-ADDA, 4-3 RCA Phono Output RB-ADDA, 4-4 Rear Panel Connections and Operation RB-ADDA, 4-3 RB-DAC1, 5-3 RB-DDA6A, 1-3 RB-DDA6S, 2-3 RB-DDA6W, 3-3 RB-DHD6, 7-3 RB-DMA2, 8-4 RB-DSS10, 10-4 RB-SC1, 6-3 RB
Index RB-SC1, 6-3 Type Switch RB-SP1, 9-3 W Wiring Connectors, 12-1 Word Clock Input RB-DDA6W, 3-3 I-4 RB-DMA2, 8-5 RB-SC1, 6-3 Word Clock Outputs RB-DDA6W, 3-3 X XLR Connectors Wiring, 12-1 Redbox User Handbook
