REDBOX A5-HANDBOOK-01.indd
Redbox
User Handbook No 1
Digital Audio Converters, Synchronisers, Delays
& Silence Detectors
RB-ADDA
Combined A/D and D/A unit (24 bit, 96kHz
capable) (1U)
RB-ADDA2
Combined A/D and D/A unit (24 bit, 192kHz
capable) (1U)
RB-SC1
Sample rate converter (24 bit, 96kHz capable)
RB-DAC1
Digital to analogue converter
RB-SP1
Digital AES/EBU splitter & combiner unit
RB-DS2
Stereo audio delay synchroniser (AES/EBU &
analogue) (1U)
RB-SD1
Silence detection unit (1U)
Revision 2.00 August, 2006
©Sonifex Ltd, 2000-6
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 : [email protected] or [email protected]
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. Sonifex Ltd shall not be liable for any loss or
damage whatsoever arising form the use of information or any error contained in this
manual.
No part of this manual may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or information storage and
retrieval systems, for any purpose other than the purchaser’s personal use, without the
express written permission of Sonifex Ltd.
Unless otherwise noted, all names of companies, products and persons contained herein are
part of a completely fictitious adaptation and are designed solely to document the use of
Sonifex products.
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Redbox User Handbook No 1
CONTENTS
Warranty
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Safety Information
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Safety of Mains Operated Equipment
Voltage Setting Checks
Fuse Rating
Power Cable and Connection
Ordering the Correct Mains Lead
Installation Information
Atmosphere
Electromagnetic Radiation
Fitting Redboxes
WEEE & RoHS Directives - Sonifex Statement
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DIGITAL AUDIO CONVERTERS
1
RB-ADDA Combined A/D and D/A Converter
1
Introduction
System Block Diagram
Front Panel Indicators
Rear Panel Connections and Operation
RB-ADDA Inputs
XLR Analogue Inputs (Left and Right)
RCA Phono Inputs (Left and Right)
Input Level Adjustment
AES/EBU Inputs
S/PDIF Inputs
RB-ADDA Outputs
Analogue Outputs (Left and Right)
RCA Phono Outputs (Left and Right)
Output Level Adjustment
AES/EBU Output
S/PDIF Output
Rear Panel Controls
Full Scale dB Settings
Status Select Switches
Digital Select Buttons
Analogue Select Button
Frequency and Sync Mode Rotary Switch
Test/Calibration Mode
Technical Specifications RB-ADDA
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RB-ADDA2 Combined A/D and D/A Converter 24bit 192kHz
Introduction
Master Mode
Slave Mode
Auto Mode
Auto Lock Mode
System Block Diagram
Front Panel Controls & Indicators
SYNC Button & LEDs
A/D SOURCE Select Button & LEDs
FREQUENCY Set Button & LEDs
BITS Button & LEDs
Redbox User Handbook No 1
CON T E N TS
Warranty and Liability - important the purchaser is advised to read this clause
Unpacking the Redbox
Warranty Registration
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CON T E N TS
CO N T E N TS
D/A SOURCE Select Button & LEDs
Reset Button
Rear Panel Connections and Operation
RB-ADDA2 Inputs
XLR Analogue Inputs (Left and Right)
RCA Phono Inputs (Left and Right)
Input Level Adjustment
AES/EBU Input
S/PDIF Input
Optical Input
AES/EBU Sync Input
Word Clock Input
RB-ADDA2 Outputs
Analogue Outputs (Left and Right)
RCA Phono Outputs (Left and Right)
Output Level Adjustment
AES/EBU Output
S/PDIF Output
Optical Output
Serial Port Control
Serial Interface Commands and Responses
Error messages
Upgrading Firmware
Technical Specification RB-ADDA2
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RB-SC1 Sample Rate Converter
Introduction
System Block Diagram
Front Panel Indicators
Front Panel LED
Rear Panel Connections and Operation
Inputs and Outputs
AES/EBU Inputs
S/PDIF Inputs
Word Clock Input
Status Select Switches
S/PDIF
Inputs
Digital Input
Select Buttons
S/PDIF Output
Word
Clock Input
Frequency and Sync Mode Rotary Switch
AES/EBU Output
S/PDIF Output
Rear Panel Controls
Status Select Switches
Digital Input Select Buttons
Frequency and Sync Mode Rotary Switch
Technical Specifications RB-SC1
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RB-DAC1 Digital to Analogue Converter
Introduction
System Block Diagram
Front Panel Indicators & Controls
Sync & Power Indicator
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Redbox User Handbook No 1
CONTENTS
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RB-SP1 Digital Splitter & Combiner
Introduction
System Block Diagram
Front Panel Indicators & Controls
Front Panel LED’s
Type & Mode Switches
Split 96
Rear Panel Connections and Operation
Stereo/Mono
Bypass
Inputs and Outputs
AES/EBU Inputs
S/PDIF Inputs
AES/EBU Outputs
S/PDIF Outputs
Rear Panel Controls
Digital Input & Output Select Buttons
Mode Select Dip Switches
Technical Specifications RB-SP1
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CON T E N TS
Headphone Output
Volume Control
Rear Panel Connections and Operation
RB-DAC1 Inputs
AES/EBU Input
S/PDIF Input
RB-DAC1 Outputs
Analogue Outputs (Left and Right)
RCA Phono Outputs (Left and Right)
Rear Panel Controls
Output Level Adjustment
De-emphasis Switch
Digital Select Button
Technical Specifications RB-DAC1
SYNCHRONISERS, DELAYS & SILENCE DETECTORS
6
RB-DS2 Audio Delay Synchroniser
Introduction
Extended Mode using Compact Flash™
Front Panel Controls
Setting the Delay
Selecting The Main Menu
Bypassing The Delay
System Reset
Rear Panel Connections and Operation
XLR Analogue Inputs (Left and Right)
Analogue Input Adjustment
AES/EBU Input
XLR Analogue Outputs (Left and Right)
AES/EBU Output
Remote Inputs and Outputs
RS232
The Default Screen
The Main Menu
Mode
Source
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CON T E N TS
CO N T E N TS
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Channels
Sample Rate
Sample Width
Format
Delay Units
Volume
Input Peak Digits
Output Gain
Analogue Mute
Digital Mute
Setups
View
Load
Save
Remote Loading
Memory Card
Details
Format Card
Control Lock
System
Baud Rate
Set Time
Set Date
Information
Serial Port Control
Serial Interface Commands and Responses
Upgrading Firmware
Technical Specification RB-DS2
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RB-SD1 Silence Detection Unit
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Introduction
System Block Diagram
Rear Panel Connections and Operation
A/B Inputs (Left and Right)
Outputs
Silence Detect Trigger Level
Silence Detect Interval Control
Mode Dip Switch Settings
Remotes Connector
Front Panel Selectors and Indicators
Source Select and Indicator
Mode Selector and Indicator
Main and Aux Indicators
Alarm Indicator
Restore Button
Additional Modes
To Set the Additional Modes
Technical Specifications RB-SD1
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Redbox User Handbook No 1
FIGURES
Figures
Fig A: Packing List.
ii
Fig B: Fuse Rating Table.
iii
Fig C: Mains Cable Wire Colours
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Fig D: Mains Lead Table.
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Fig E: RB-RK1Small Redbox Front Rack-mount Kit .
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Fig F: RB-RK2 Small Redbox Rear Rack-mount Kit.
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Fig 1-1: RB-ADDA Front Panel
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Fig 1-2: RB-ADDA System Block Diagram
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Fig 1-3: RB-ADDA Rear Panel
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Fig 1-4: RB-ADDA Full Scale dB Settings
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Fig 1-5: RB-ADDA Status Select Switches
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Fig 1-6: RB-ADDA Frequency and Sync Rotary Switch
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Fig 2-1: RB-ADDA2 Front Panel
Fig 2-2: RB-ADDA2 System Block Diagram
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Fig 2-3: SYNC Button & LEDs
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Fig 2-4: A/D SOURCE Select Button & LEDs
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Fig 2-5: FREQUENCY Set Button & LEDs
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Fig 2-6: CS DATA Button & LEDs
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Fig 2-7: BITS Button & LEDs
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Fig 2-8: D/A SOURCE Select Button & LEDs
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Fig 2-9: RB-ADDA2 Rear Panel
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Fig 3-1: RB-SC1 Front Panel
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Fig 3-2: RB-SC1 System Block Diagram
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Fig 3-3: RB-SC1 Rear Panel
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Fig 3-4: RB-SC1 Status Switches
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Fig 3-5: RB-SC1 Frequency and Sync Rotary Switch Settings
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Fig 4-1: RB-DAC1 Front Panel
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Fig 4-2: RB-DAC1 System Block Diagram
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Fig 4-3: RB-DAC1 Front Panel
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Fig 4-4: RB-DAC1 Rear Panel
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Fig 4-5: RB-DAC1 Full Scale Digits and De-emphasis Settings Switches
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Fig 5-1: RB-SP1 Front Panel
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Fig 5-2: RB-SP1 System Block Diagram
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Fig 5-3: RB-SP1 Front Panel
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Fig 5-4: RB-SP1 Type and Mode Flow Diagrams
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Fig 5-5: RB-SP1 Rear Panel
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Fig 5-6: RB-SP1 Mode Select Dip Switches
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Fig 6-1: RB-DS2 Front Panel
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Fig 6-2: RB-DS2 System Block Diagram
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Fig 6-3: RB-DS2 Front Panel Controlsl
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Fig 6-4: RB-DS2 Rear Pane
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Redbox User Handbook No 1
FI G U RE S
Fig G: RB-RK3 Large Redbox Rear Rack-mount Kit.
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FI G U R E S
Fig 6-5: The Default Screen
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Fig 6-6: The Main Menu
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Fig 6-7: Maximum Delays in Normal Mode (Using On-Board Memory Only)
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FI G U RE S
Fig 6-8: Maximum Delays in Extended Mode with 128 MB
Compact Flash™ Memory Card Installed
Fig 6-9: Maximum Delays in Extended Mode with 1 GB
Compact Flash™ Memory Card Installed.
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Fig 7-1: RB-SD1 Front Panel
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Fig 7-2: RB-SD1 System Block Diagram
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Fig 7-3: RB-SD1 Rear Panel
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Fig 7-4: RB-SD1 Front Panel
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Redbox User Handbook No 1
WARR ANT Y
Warranty
Warranty and Liability - important the purchaser is advised to read this clause
(a)
The Company agrees to repair or (at its discretion) replace Goods which are found to
be defective (fair wear and tear excepted) and which are returned to the Company
within 12 months of the date of despatch provided that each of the following
are satisfied:
Notification of any defect is given to the Company immediately upon its
becoming apparent to the Purchaser;
(ii)
The Goods have only been operated under normal operating conditions and
have only been subject to normal use (and in particular the Goods must have
been correctly connected and must not have been subject to high voltage or
to ionising radiation and must not have been used contrary to the Company’s
technical recommendations);
(iii)
The Goods are returned to the Company’s premises at the Purchaser’s expense;
(iv)
Any Goods or parts of Goods replaced shall become the property of the
Company;
(v)
No work whatsoever (other than normal and proper maintenance) has been
carried out to the Goods or any part of the Goods without the Company’s prior
written consent;
(vi)
The defect has not arisen from a design made, furnished or specified by the
Purchaser;
WARR ANT Y
(i)
(vii) The Goods have been assembled or incorporated into other goods only in
accordance with any instructions issued by the Company;
(viii) The defect has not arisen from a design modified by the Purchaser;
(ix)
The defect has not arisen from an item manufactured by a person other than
the Company. In respect of any item manufactured by a person other than the
Company, the Purchaser shall only be entitled to the benefit of any warranty or
guarantee provided by such manufacturer to the Company.
(b)
In respect of computer software supplied by the Company the Company does not
warrant that the use of the software will be uninterrupted or error free.
(c)
The Company accepts liability:
(i)
For death or personal injury to the extent that it results from the negligence of
the Company, its employees (whilst in the course of their employment) or its
agents (in the course of the agency);
Redbox User Handbook No 1
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WA R R A N T Y
WARR ANT Y
(ii)
For any breach by the Company of any statutory undertaking as to title, quiet
possession and freedom from encumbrance.
(d)
Subject to conditions (a) and (c) from the time of despatch of the Goods from the
Company’s premises the Purchaser shall be responsible for any defect in the Goods
or loss, damage, nuisance or interference whatsoever consequential economic or
otherwise or wastage of material resulting from or caused by or to the Goods. In
particular the Company shall not be liable for any loss of profits or other economic
losses. The Company accordingly excludes all liability for the same.
(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).
(f )
Subject to Condition (e) no representation, condition, warranty or other term, express
or implied (by statute or otherwise) is given by the Company that the Goods are of
any particular quality or standard or will enable the Purchaser to attain any particular
performance or result, or will be suitable for any particular purpose or use under
specific conditions or will provide any particular capacity, notwithstanding that the
requirement for such performance, result or capacity or that such particular purpose
or conditions may have been known (or ought to have been known) to the Company,
its employees or agents.
(g)
(i)
To the extent that the Company is held legally liable to the Purchaser for any
single breach of contract, tort, representation or other act or default, the
Company’s liability for the same shall not exceed the Price of the Goods.
(ii)
The restriction of liability in Condition (g)(i) shall not apply to any liability
accepted by the Seller in Condition (c).
(h)
Where the Goods are sold under a consumer transaction (as defined by the
Consumer Transactions (Restrictions on Statements) Order 1976) the statutory
rights of the Purchaser are not affected by these Conditions of Sale.
Unpacking the Redbox
The Redbox is shipped with the following equipment. Please check your packaging to
ensure that you have all of the items below. If anything is missing, please contact the
supplier of your equipment immediately.
Item
Redbox audio interface
IEC Mains lead fitted with moulded mains plug
Handbook and warranty card
Quantity
1
1
1
Fig A: Packing List.
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Redbox User Handbook No 1
SAFE T Y & INSTALL ATION
INFORMATION
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 the carrier immediately with all
the relevant details of the shipment. Packing materials should be kept for inspection and
also for if the product needs to be returned.
Warranty Registration
Serial Number
………………………………………
Safety Information
Safety of Mains Operated Equipment
This equipment has been designed to meet the safety regulations currently advised
in the country of purchase and it conforms to the safety regulations specified by
use of the CE Mark.
Warning : There are no user serviceable parts inside the equipment. If you should ever
need to look inside the unit, always disconnect the mains supply before removing the
equipment covers.
Voltage Setting Checks
Ensure that the machine operating voltage is correct for your mains power supply by
checking the box in which your Redbox was supplied. The voltage is shown on the box label.
The available voltage settings are 115V, or 230V. Please note that all Redboxes are either
switchable between 115V and 230V, or have a universal power supply.
Fuse Rating
The Redboxes are supplied with a single fuse in the live conducting path of the power
infeed at the power supply. For reasons of safety it is important that the correct rating
and type of fuse is used. Incorrectly rated fuses could present a possible fire hazard, under
equipment fault conditions. The fuse ratings for the Redboxes are: Voltage
115 V
230 V
S AFE T Y & I NSTALL ATION IN FORMATION
In order to register the date of purchase so that we can keep you informed of any design
improvements or modifications, it is important to register online at:
www.sonifex.co.uk/register or complete the warranty registration document that is
enclosed and return it to Sonifex Ltd in the UK. For your own records you should write down
the serial number (which can be found on the rear of the Redbox.
Fuse
200mA, 5 x 20mm SB
100mA, 5 x 20mm SB
Fig B: Fuse Rating Table.
The active fuse is fitted on the outside rear panel of the unit.
Redbox User Handbook No 1
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S A F E T Y & I NSTALL ATION
I N F O R M AT ION
Power Cable and Connection
SAFE T Y & INSTALL ATION INFORMAT I ON
An IEC power connector is supplied with the Redbox, which has a moulded plug, attached
– this is a legal requirement. If no moulded plug has been supplied with your Redbox, please
contact your supplier, because an IEC connector is always supplied from the Sonifex factory.
If for any reason, you need to use the Redbox with a different power cable, you should use
the following wiring guidelines:
Wire Colour
Green, or green and yellow
Blue, or Black
Brown, or Red
Connection
Earth (E)
Neutral (N)
Live (L)
Fig C: Mains Cable Wire Colours
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. After the product code add:
UK, for 230V, UK 3 pin to IEC lead
EC, for 230V, European Schuko 2 pin to IEC lead
US, for 115V, 3 pin to IEC lead
AU for 230V, Australasian 3 pin to IEC lead
Fig D: Mains Lead Table.
E.g. order RB-SC1 UK for a UK IEC lead to be supplied.
Installation Information
Atmosphere
The units should be installed in an area that is not subject to excessive temperature
variation (<0°C, >50°C), moisture, dust or vibration.
Electromagnetic Radiation
The cover is connected to earth by means of the fixing screws. It is essential to maintain
this earth ground connection to ensure a safe operating environment and provide
electromagnetic shielding.
Fitting Redboxes
Redboxes can be fixed to the underside of a mixing desk, or other surfaces using 4.2mm
holes in the sides and fixed with 2 x M4 screws or 2 x No. 6 countersink wood screws.
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Redbox User Handbook No 1
SAFE T Y & INSTALL ATION
INFORMATION
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).
Fig E: RB-RK1Small Redbox Front Rack-mount Kit .
Rear Mounting Redboxes: For rear panel mounting you can use either the RB-RK2, or
RB-RK3, depending on the size of your Redbox.
RB-RK2 1U rear panel rack kit for small Redbox range, e.g., RB-BL2
Fig F: RB-RK2 Small Redbox Rear Rack-mount Kit.
e.g. for fitting an RB-BL2:
Wherever you see this symbol an RB-RK2 small Redbox rear panel 19” rack kit can be used :
RB-RK3 1U rear panel rack kit for large Redbox range, e.g., RB-DA6
Fig G: RB-RK3 Large Redbox Rear Rack-mount Kit.
S AFE T Y & I NSTALL ATION IN FORMATION
Wherever you see this symbol an RB-RK1 front panel rack kit can be used :
e.g. for fitting an RB-DA6:
Wherever you see this symbol an RB-RK3 large Redbox rear panel 19” rack kit can be used :
Note: When fitting the rear-mounting rack-kits, a notch has been
left on the inside of the right-hand rack-piece for the mains cable to
pass through. Make sure that the mains cable has been put through
the notch before attaching the right hand rack-piece.
Redbox User Handbook No 1
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S A F E T Y & I NSTALL ATION
I N F O R M AT ION
WEEE & RoHS Directives - Sonifex Statement
SAFE T Y & INSTALL ATION INFORMAT I ON
The Waste Electrical and Electronic Equipment (WEEE) Directive was agreed on
13 February 2003, along with the related Directive 2002/95/EC on Restrictions
of the use of certain Hazardous Substances in electrical and electronic
equipment (RoHS).
The Waste Electrical and Electronic Equipment Directive (WEEE) aims to minimise the
impacts of electrical and electronic equipment on the environment during their life times
and when they become waste. It applies to a huge spectrum of products. It encourages
and sets criteria for the collection, treatment, recycling and recovery of waste electrical and
electronic equipment. All products manufactured by Sonifex Ltd have the WEEE directive
label placed on the case. It gives a contact for individuals who are unsure about the correct
procedure when the product has reached its “end of use”.
Sonifex Ltd will be happy to give you information about local organisations that can
reprocess the products, or alternatively all products that have reached “end of use” can be
returned to Sonifex and will be reprocessed correctly free of charge.
Sonifex Ltd has phased out the use of certain hazardous substances identified in the
European Union’s Restriction of Hazardous Substances (RoHS) directive. The RoHS directive
limits the use of certain hazardous substances currently used in EEE manufacture, including
lead, mercury, cadmium, hexavalent chromium, and halide-containing compounds PBB
(polybrominated biphenyl) and PBDE (polybrominated diphenyl ether). Elimination of these
substances will result in more environmentally friendly recycling of electronic equipment.
For the products which Sonifex manufacture, the main area where products were affected
was in the use of lead for manufacturing and assembling electronics circuit boards.
Sonifex Ltd practices lead-free (LF) manufacturing processes. LF solder is used on the
surface-mount PCB manufacturing processes and for hand soldering. The printed circuit
boards (PCBs) used are either gold plated, or immersion tin plated, both of which use no
lead. Historically the PCBs were hot air solder levelled (HASL) PCBs which used tin/lead
based solder.
The manufacturing processes include the assembly of purchased components from various
sources. Product is offered as RoHS compliant, or LF, only after sufficient evidence is received
from the component manufacturers that their components are RoHS compliant. Sonifex
Ltd relies solely on the distributor, or manufacturer, of the components for identification of
RoHS compliance. Thus whilst every effort is made to ensure compliance, Sonifex Ltd makes
no warranty, or certification, or declaration of compliance concerning said components.
Sonifex Ltd defines “Lead Free” as pertaining to any product, which has been manufactured
by Sonifex Ltd using components which have been declared by the manufacturers as
“Lead Free”. All statements by Sonifex Ltd of RoHS compliance are based on component
manufacturer documentation.
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Redbox User Handbook No 1
DIGITAL AUDIO CONVERTERS
1
1
RB-ADDA Combined A/D and D/A Converter
Introduction
Fig 1-1: RB-ADDA Front Panel
The unit operates in four modes:
Master Mode - In this mode the unit receives an analogue audio signal, which
is digitised and formatted for digital serial transmission (IEC958). The necessary
clock signals are generated internally from an on board master clock at a
selectable rate (32kHz, 44.1kHz, 48kHz, 64kHz, 88.1kHz or 96kHz).
Slave Mode - In this mode the unit automatically detects the presence of a digital audio
sync signal, if present at the digital input, and synchronises the digital output to it. If no sync
is present, no output will be generated.
Auto Mode - Here the unit synchronises to the digital audio sync signal if present at the
digital input and uses the internal master clock only if no sync input signal is detected. In
this case, the internal master clock is used at the selected sample rate.
Auto Lock Mode - This operates like the auto mode. The difference is that if the sync input
signal is lost, the unit will revert to an internal master clock rate as near as possible to the
last sync signal received.
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 RBADDA should be calibrated once it has been powered up for more than 10 minutes.
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.
DI G I TAL AU DIO CONVERTERS - RB -ADDA
Using 24 bit, 96kHz capable devices, the RB-ADDA A/D and D/A Converter is a 1U rackmount which produces an AES/EBU or S/PDIF level digital audio output from a balanced XLR
or unbalanced phono stereo audio input. The unit also produces a stereo balanced XLR or
unbalanced phono output from an incoming AES/EBU or S/PDIF digital input signal.
There are buttons to select either the AES/EBU or S/PDIF input or output for the D/A and
A/D sections respectively. The output bit depth can be selected from 16, 20 or 24 bits.
Inputs of a different bit depth to the output are dithered using a psychoacoustic noise filter.
Redbox User Handbook No 1
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D I G I TA L AUDIO CONVERTERS
For the digital output, there is a switch available to define the content of the channel status
bits embedded within the digital audio stream. The channel status bits will be forced to
Professional Mode for sample rates above 48kHz as they are not supported by the Consumer
Mode. For sample rates of 32kHz, 44.1kHz and 48kHz, the status bits can be either set to
Professional or Consumer Mode.
D IGITAL AUDIO CONVERTERS - RB -ADDA
System Block Diagram
Fig 1-2: RB-ADDA System Block Diagram
Front Panel Indicators
The LED on the front panel is normally red to indicate that power is present on the unit.
However, it also has a secondary role to indicate the status of the digital inputs
Fast flashing between red and amber – indicates a loss of digital input signal or that the unit
is being calibrated.
Rear Panel Connections and Operation
RCA Phono RCA Phono
Inputs
Outputs
XLR Analogue
Inputs
Fig 1-3: RB-ADDA Rear Panel
2
AES/EBU
Input
XLR Analogue
Outputs
Digital Select
Button
S/PDIF
Input &
Output
AES/EBU
Output
Frequency & Synch
Mode Rotary Switch
Status Select
Switches
Digital Select
Button
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RB-ADDA Inputs
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.
Input Level Adjustment
The input gain can be individually adjusted for left and right channels by dipswitches and
through pre-set potentiometers accessible on the rear panel. For full scale dB settings refer
to Fig 1-4.
Individual preset pots give a further ± 3dBu to give a total gain range of +9dBu to +27dBu
for full-scale digits. The consumer input on the phono connector has a further 10dbU gain
incorporated to give a total gain range of -1dBu to +17dBu for full-scale digits.
AES/EBU Inputs
The digital input XLR 3 pin socket has an impedance of 110 Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector should meet the IEC 60968 specification
S/PDIF Inputs
The S/PDIF digital phono inputs have an impedance of 75Ω.
RB-ADDA Outputs
Analogue Outputs (Left and Right)
The XLR 3 pin output plug connectors are electronically balanced with an output
impedance of less than 50Ω. They have the following connections:
Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
DI G I TAL AU DIO CONVERTERS - RB -ADDA
RCA Phono Inputs (Left and Right)
The two left and right RCA inputs are unbalanced and have an impedance of greater
than 20kΩ.
RCA Phono Outputs (Left and Right)
These RCA (phono) outputs are unbalanced and have an output impedance of less
than 75Ω.
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D IGITAL AUDIO CONVERTERS - RB -ADDA
Output Level Adjustment
The output gain can be individually adjusted for left and right channels through the rear
panel by dipswitches. Each 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 (see Fig 1-4).
The consumer output on the phono connector has a further 10dbU attenuation
incorporated.
AES/EBU Output
The digital output XLR 3 pin socket has an impedance of 110Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector will comply with the IEC 60968 specification
S/PDIF Output
The digital output S/PDIF phono output has an impedance of 75Ω.
Rear Panel Controls
Full Scale dB Settings
The full-scale dB settings can be set for signals of +12, +18, +24 dBu to give full-scale digits
in the digital domain.
Analogue (A/D)
Input Full Scale
Setting (dBu)
Switch 1
Switch 2
+12
OFF
OFF
+18
ON
OFF
+24
ON
ON
Analogue (D/A)
Output Full Scale
Setting (dBu)
Switch 3
Switch 4
+12
OFF
OFF
+18
ON
OFF
+24
ON
ON
Fig 1-4: RB-ADDA Full Scale dB Settings
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Status Select Switches
These switches are used to determine the status or content of the digital signals.
The type of information encoded in the channel status bits of a digital audio signal can be
professional or consumer and is determined by switch 1. However at bit rates higher than
48kHz, consumer mode is not available, so professional mode is used and this switch will
be ignored.
If de-emphasis is selected (switch 2) the RB-ADDA will decode 50/15µs emphasis when
indicated by certain channel status bits in the incoming digital audio data.
Status
1
ON
Professional
1
OFF
Consumer
2
ON
De-emphasis On
2
OFF
De-emphasis Off
Bits
16
20
24
3
OFF
OFF
ON
4
OFF
ON
ON
Fig 1-5: RB-ADDA Status Select Switches
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.
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).
Frequency and Sync Mode Rotary Switch
This rotary switch is used to select the Synchronisation Mode and to select the frequency
of the digital output when using the on-board clock generator. There are 4 modes of
operation: - Master Mode, Auto Sync Mode, Auto Lock Sync Mode & Slave Mode.
DI G I TAL AU DIO CONVERTERS - RB -ADDA
The sample size for the analog to digital conversion can be set to 24, 20 or 16 bits (switch 3
& 4). When the signal is truncated from 24 bits, a psycho-acoustic filter is applied to maintain
optimum signal quality. These settings are summarised by the table in Fig 1-5, which is also
shown on the top panel of the unit.
In Master Sync Mode, switch positions 0 – 5, the digital output sample rate is simply set by,
and locked to, the internal on-board clock generator. No sync signal is used or required.
In Auto Sync Mode, switch positions 6– B, the digital output sample rate follows the digital
input. When the digital input signal is not present the output sample rate will be set by,
and locked to, the internal on-board clock generator at a frequency determined by the
switch position.
In Auto-Lock Sync Mode, switch position C, No output will be generated until lock is
achieved with a digital input signal. The digital output sample rate now follows the digital
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D I G I TA L AUDIO CONVERTERS
input. If the digital input 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 digital input.
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.
D IGITAL AUDIO CONVERTERS - RB -ADDA
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.
Frequencies and Sync Modes
Rotary
Switch
Number
Mode
Sample
DIGITAL
AUDIO CONFrequency
VERTERS
(kHz)
0
Master
32
1
Master
44.1
2
Master
48
3
Master
64
4
Master
88.2
5
Master
96
6
Auto
32
7
Auto
44.1
8
Auto
48
9
Auto
64
A
Auto
88.2
B
Auto
96
C
Auto Lock
-
D
Slave
-
Fig 1-6: RB-ADDA Frequency and Sync Rotary Switch
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.
To calibrate the RB-ADDA, set the rotary FREQUENCIES AND SYNC MODES switch to position
“F”. The power LED on the front panel will flash quickly for 2 – 3 seconds and will illuminate
fully when the unit is calibrated. Once calibration is complete, reset the rotary switch to the
position that you require.
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Technical Specifications RB-ADDA
A/D Connections
Analogue Inputs:
Digital Outputs:
Analogue Outputs:
D/A Audio Specification
Max Output Level:
Max Output Level:
Output Impedance:
Output Impedance:
Dynamic Range:
Gain Range:
Other Connections
Mains Input:
Operational Controls
Analogue Input Select:
Bit Depth:
Digital Output Select:
Modes & Frequencies:
Digital Input Select:
Channel Status Bits:
Equipment Type
RB-ADDA
Physical Specifications
Dimensions (Raw)
Dimensions (Boxed)
Weight
Redbox User Handbook No 1
+27dBu (balanced inputs)
+17dBu (unbalanced inputs)
>10kΩ bridging (balanced inputs)
>20kΩ (unbalanced inputs)
Switchable +24dBu/+18dBu/+12dBu for FSD
Adjustable 3dB loss to 3dB gain (L and R adjust)
Better than –109dbFS (RMS A-weighted at 24bit)
>110dB
>96dB THD + N at 1kHz
1 x AES/EBU XLR 3 pin female
1 x S/PDIF RCA phono
2 x XLR 3 pin male (balanced) (L & R)
2 x RCA phono (unbalanced) (L & R)
+24dBu (balanced outputs)
+14dBu (unbalanced outputs)
<50Ω (balanced outputs)
<75Ω (unbalanced outputs)
>100dB
Selectable 12dBu, 18dBu or 24dBu output level, ref FSD
Filtered IEC, 110-120V, or 220-240V switchable,
fused 10W max
XLR or phono, via push-switch
16, 20 or 24 bits via DIP switch
AES/EBU or S/PDIF, via push-switch
16 way rotary DIP switch
AES/EBU or S/PDIF, via push-switch
Set to consumer or professional mode via DIP switch
DI G I TAL AU DIO CONVERTERS - RB -ADDA
A/D Audio Specification
Maximum Input Level:
Maximum Input Level:
Input Impedance:
Input Impedance:
Input Levels:
Gain Range:
Signal to Noise:
Dynamic Range:
Distortion and Noise:
D/A Connections
Digital Inputs:
2 x XLR 3 pin (balanced) (L & R)
2 x RCA phono (unbalanced) (L & R)
1 x AES/EBU XLR 3 pin plug
1 x S/PDIF RCA phono socket
Combined A/D and D/A converter
48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
53cm (W) x 20.5cm (D) x 6cm (H)
Nett: 1.6kg
Gross: 2.2kg
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2 RB-ADDA2 Combined A/D and D/A Converter 24bit 192kHz
DIGITAL AUD IO CONVERTERS - RB -ADDA2
Introduction
Sync Button
and LEDs
Reset
Button
Frequency Set Bits Button
Button and LEDs and LEDs
A/D Source Select
Button and LEDs
CS Data Button
and LEDs
D/A Source Select
Button and LEDs
Fig 2-1: RB-ADDA2 Front Panel
192
The RB-ADDA2 A/D and D/A converter is a 1U rack-mount which produces
an AES/EBU, S/PDIF or TOSlink optical level digital audio output from a
balanced XLR or unbalanced phono stereo audio input. It also produces
a stereo balanced XLR or unbalanced phono output from an incoming
AES/EBU, S/PDIF or TOSlink optical digital input signal.
The RB-ADDA2 is a high performance, enhanced version of the RB-ADDA providing the
following additional features:
•
It supports higher sample frequency rates up to and including 176.4kHz and 192kHz.
•
It has additional independent AES/EBU and Word Clock synchronising inputs, so
that the A/D and D/A sections can operate independently, with the digital outputs
synchronised to an external master reference clock.
•
It has TOSlink optical digital audio input and output.
•
It has front panel push-button switches for all the main settings. The buttons are
arranged in sets, where pressing the button advances the current selection and
LED indicator.
•
A serial RS232 port is included so that the RB-ADDA2 settings can be controlled
remotely. The front panel LED indicators alter automatically when using RS232
commands.
The A/D SOURCE push-button is used to select from either the balanced or unbalanced
stereo analogue inputs and this push-button also defines the input level for full scale digits
at one of +12dBFS, +18dBFS or +24dBFS. These values can then be fine-tuned by using
rear-panel pre-set potentiometers which give another ±3dB of gain adjustment, allowing
a signal range from +9dBu to +27dBu. The RCA phono inputs have a further 10dB nominal
gain incorporated to give a total signal range of -1dBu to +17dBu for full-scale digits.
For the digital output, there are three push-button switches to select the sample frequency,
bit depth and status bit modes. The FREQUENCY button allows selection of the master
sample frequency from one of 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz.
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The BITS button sets the output bit depth as one of 16, 20 or 24 bits, and the CS DATA
button defines the content of the channel status bits embedded within the digital audio
stream. The channel status bits will be forced to Professional Mode for sample rates above
48kHz as they are not supported by the Consumer Mode. For sample rates of 32kHz, 44.1kHz
and 48kHz, the status bits can be forced to either Professional Mode (PRO), Consumer Mode
(CON) or to follow the mode of the input (FOLLOW).
The SYNC button is used to select the synchronisation input, from Word Clock, AES/EBU or
the D/A input, and also the synchronisation mode of the digital output. The A/D section of
the RB-ADDA2 operates in four selectable modes:
Slave Mode
In this mode the unit is synchronised to an external source, using the digital audio sync or
D/A input signal from which the clock signals are stripped, or to the TTL level Word Clock.
The FREQUENCY LED will indicate the synchronised sample frequency and if no sync is
present, no output will be generated.
Auto Mode
Here, the unit is synchronised to an external source, using the digital audio sync or D/A
input signal from which the clock signals are stripped, or to the TTL level Word Clock. If no
sync signal is present the unit runs from the onboard master clock at a rate selected by the
front panel control (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz).
Auto Lock Mode
This operates like the auto mode except that if no sync signal is present the unit will run at
the closest master clock rate to the last locked incoming signal. The FREQUENCY LED will
indicate the synchronised sample frequency.
When operating in sync modes, the SYNC button flashes whenever the unit is not
synchronised to the incoming digital signal.
The D/A section has one SOURCE push-button which is used to select the digital input
source from AES/EBU, S/PDIF or TOSlink optical and which also sets the analogue output
level to be generated for full scale digits, from either +12dBFS, +18dBFS or +24dBFS. The
RCA phono outputs have a further 10dB nominal attenuation to reduce the signal to that
expected by consumer equipment. There are factory-set internal level controls for fine
tuning the analogue output gain adjustment. If no digital audio source is present, the D/A
SOURCE button flashes.
DI G I TAL AU DIO CONVERTERS - RB -ADDA2
Master Mode
In this mode the unit receives an analogue audio signal, which is digitised and formatted
for digital serial transmission (IEC958). The necessary clock signals are generated internally
from an on board master clock at a selectable rate (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz,
176.4kHz or 192kHz).
The RB-ADDA2 automatically decodes 50/15µs emphasis if this is indicated by certain
channel status bits in the incoming digital audio data. In both A/D and D/A sections, audio is
sent to all of the outputs simultaneously. A red LED indicates when power to the RB-ADDA2
is on.
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System Block Diagram
Digital Input
Optical
Digital Source
Select
AES
Rec
AES/EBU
L
DAC
R
Analogue
Output
Consumer
R Unbalanced
S/PDIF
DIGITAL AUD IO CONVERTERS - RB -ADDA2
Sync Input
AES/EBU
Word
Clock
L
Professional
Balanced R
Analogue
Input L
Consumer
Unbalanced R
L
AES
Rec
Master
Clock
Generator
Rec
Gain
ADC
Frequency
Select
Gain
Analogue
Input Select
Digital
Output
AES/EBU
AES
Transmitter
S/PDIF
Digital
Send Select
Optical
Fig 2-2: RB-ADDA2 System Block Diagram
Front Panel Controls & Indicators
The LED on the front panel is normally red to indicate that power is present on the unit.
SYNC Button & LEDs
This button will select one of the 4 operating modes for
the RB-ADDA2 Analogue to Digital conversion. 3 modes
use an external sync and this button is also used to select
the external sync source that generates the sampling
frequency used. The Mode button will flash when the
external sync signal selected is not present.
A/D SOURCE Select Button & LEDs
This button will select between the balanced and
unbalanced analogue audio inputs for the RB-ADDA2
Analogue to Digital conversion. The signal level
corresponding to full-scale digits can be set to +12, +18
or +24dBu.
FREQUENCY Set Button & LEDs
When the button is not illuminated it will select the internal
master frequency that is used in Master Mode and in Auto
Mode when no sync signal is present. At other times, when
the button is illuminated, the LEDs will show the actual
sampling frequency of the incoming sync source. To view
the Master Frequency press the button once to enter the
setting mode. Any further button presses will advance the
set frequency.
10
Professional
Balanced
Fig 2-3: SYNC Button & LEDs
Fig 2-4: A/D SOURCE Select
Button & LEDs
Fig 2-5: FREQUENCY Set
Button & LEDs
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Fig 2-6: CS DATA Button & LEDs
BITS Button & LEDs
This button sets the bit depth of the RB-ADDA2 Analogue
to Digital conversion to 16, 20 or 14 bits. The bit depth is
reflected in the appropriate channel status bits in the digital
output stream.
Fig 2-7: BITS Button & LEDs
D/A SOURCE Select Button & LEDs
This button will select the digital audio input source
for the RB-ADDA2 Digital to Analogue conversion and
will also set the level of the output signal corresponding
to full-scale digits to +12, +18 or +24dBu. The D/A
SOURCE select button will flash if the digital audio
source selected is not present.
Fig 2-8: D/A SOURCE Select
Button & LEDs
Reset Button
In the unlikely event that the RB-ADDA2 unit fails to respond, press
the reset button to reboot the unit (see Fig 2-1 for location).
Rear Panel Connections and Operation
XLR Analogue
Outputs
SPDIF
Output
RCA Phono
Inputs
XLR Analogue
Inputs
RCA Phono
Outputs
Input Level
Adjustment
AES
Sync Input
SPDIF AES Digital
Fuse
Input Input
Optical Optical
Output Input
AES Digital
Output
RS232
IEC Mains
Input
DI G I TAL AU DIO CONVERTERS - RB -ADDA2
CS DATA Button & LEDs
This button will select the type of channel status bits to be
embedded in the digital audio output – either professional
or consumer. The channel status type can be set directly or
can follow the digital audio input source.
2
Word Clock
Sync Input
Fig 2-9: RB-ADDA2 Rear Panel
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RB-ADDA2 Inputs
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:
DIGITAL AUD IO CONVERTERS - RB -ADDA2
Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
RCA Phono Inputs (Left and Right)
The two left and right RCA inputs are unbalanced and have an impedance of greater
than 20kΩ.
Input Level Adjustment
The input gain is set for both left and right channels by using the A/D SOURCE Select Button
(Fig 2-4). Pre-set potentiometers, accessible on the rear panel, give a further ± 3dBu to give a
total signal range of +9dBu to +27dBu for full-scale digits.
The RCA Phono Inputs have a further 10dBu nominal gain incorporated to give a total signal
range of -1dBu to +17dBu for full-scale digits.
AES/EBU Input
The digital input XLR 3 pin socket has an impedance of 110Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector should meet the IEC 60968 specification
S/PDIF Input
The S/PDIF digital phono input have an impedance of 75Ω.
Optical Input
The digital audio optical input meets the TOSLink specification used by most professional &
consumer equipment.
AES/EBU Sync Input
The digital input XLR 3 pin socket has an impedance of 110 Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector should meet the IEC 60968 specification.
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Word Clock Input
The Word Clock input is designed to receive a distributed clock running at the actual
sampling frequency. The signal can be differential, or single ended, TTL level.
RB-ADDA2 Outputs
Analogue Outputs (Left and Right)
The XLR 3 pin output plug connectors are electronically balanced with an output
impedance of less than 50Ω. They have the following connections:
RCA Phono Outputs (Left and Right)
These RCA (phono) outputs are unbalanced and have an output impedance of less
than 75Ω.
Output Level Adjustment
The output gain can be individually adjusted for left and right channels through the
front panel by the D/A SOURCE Select button (Fig 2-8). Each 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. The RCA phono outputs have a further 10dBu nominal attenuation
incorporated.
AES/EBU Output
The digital output XLR 3 pin socket has an impedance of 110Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector will comply with the IEC 60968 specification
S/PDIF Output
The digital output S/PDIF phono output has an impedance of 75Ω.
Optical Output
The digital audio optical output meets the TOSLink specification used by most professional
& consumer equipment.
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DI G I TAL AU DIO CONVERTERS - RB -ADDA2
Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
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Serial Port Control
The Serial Port allows the RB-ADDA2 to be controlled and updated from a PC via a pin-topin serial cable, using the Sonifex Serial Control Interface (SCI) software. This software is
available as a free download from the Sonifex website at www.sonifex.co.uk/sci.
DIGITAL AUD IO CONVERTERS - RB -ADDA2
Default Settings for the Serial Port
14
Baud Rate:
19200
Data Bits:
8
Stop Bits:
1
Parity:
Even
Handshaking:
XON/XOFF
Serial Interface Commands and Responses
Most of the commands follow the same structure: a 3 letter command followed by a colon,
followed by a parameter (if any) and terminated by Carriage Return with optional Line Feed.
A Line Feed character may be sent but it will be ignored by the RB-ADDA2. Commands are
not case sensitive and all parameters are in hex.
Responses are CR & LF terminated.
After the delay synchroniser has been powered-up, an initialisation string is sent
“Initialising ADDA2”.
Following are the commands and the expected responses:
Command
Description
Response
ADB:nn
- Set ADC Bit Size
nn=00
- 16 Bits
nn=01
- 20 Bits
nn=02
- 24 Bits
- ACK:
ADC:nn
- Set ADC Channel Status Type
nn=00
- Send Consumer CS Data
nn=01
- Follow Sync Input (or use last set)
nn=02
- Send Professional CS Data
- ACK:
ADF:nn
- Set ADC Channel Status Type
nn=00
- Select 32kHz Master Clock Sample Rate
nn=01
- Select 44kHz Master Clock Sample Rate
nn=02
- Select 48kHz Master Clock Sample Rate
nn=03
- Select 88kHz Master Clock Sample Rate
nn=04
- Select 96kHz Master Clock Sample Rate
- ACK:
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Command
Description
nn=05
nn=06
Response
- Select 176kHz Master Clock Sample Rate
- Select 192kHz Master Clock Sample Rate
ADM:nn
- ACK:
ADS:nn
- ACK:
- Set ADC Source & Full Scale Input Level
nn=00
- Select Balanced XLR Inputs
nn=04
- Select Unbalanced Phono Inputs
And add
- +12dBu represents Full Scale Digits (+2 for unbalanced)
- +18dBu represents Full Scale Digits (+8 for unbalanced)
- +24dBu represents Full Scale Digits (+14 for unbalanced)
Bnn:
- Baud Rate
nn=11 (115200)
nn=57 (57600)
nn=38 (38400)
nn=19 (19200)
nn=96 (9600)
DAS:nn
- Set DAC Source & Full Scale Output Level
nn=04
- Select AES Digital Audio Input
nn=08
- Select SPDIF Digital Audio Input
nn=10
- Select Optical Digital Audio Input
- ACK: (at old rate)
- ACK:
And addnn=01
nn=02
nn=03
- Full Scale Digits Sends +12dBu Out (+2 for unbalanced)
- Full Scale Digits Sends +18dBu Out (+8 for unbalanced)
- Full Scale Digits Sends +24dBu Out (+14 for unbalanced)
DWN:
- Download new code
-OK: then erasing message
Then send S-records followed by S-record terminator to force
programming of flash memory and reboot
FPS:
- Request Front Panel Settings
- FPS:aa_bb_cc_dd_ee_ff
Where aa = value from ADC Mode as ADM: above
bb = value from ADC Source as ADS: above
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DI G I TAL AU DIO CONVERTERS - RB -ADDA2
- Set ADC Mode & Select Sync Source
nn=00
- Master Mode
nn=04
- Auto Mode
nn=08
- Auto Lock Mode
nn=10
- Slave Mode
For last three modes add
nn=01
- Select External AES Sync input as sync source
nn=02
- Select DA Stage input as sync source
nn=03
- Select Word Clock input as sync source
nn=01
nn=02
nn=03
2
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Command
Description
Response
DIGITAL AUD IO CONVERTERS - RB -ADDA2
cc = value from ADC Frequency as ADF: above
dd = value from ADC Bits as ADB: above
ee = value from ADC CS Data Select as ADC: above
ff = value from DAC Source as DAS: above
LOC:
- Lock Front Panel
- ACK:
MEM:
- Memory Dump
MFn:
- Limit Front Panel Frequency Selection
Where n=0 for No Limit
n=1 for 48kHz Limit &
n=2 for 96kHz Limit
REG:
- Register Dump
- Registers, then 4 lines of 8 x Rrr:dd
Where rr is register number and dd is value shown as 2 hex digits
SER:
- Serial Number request
- SER:012345
SRQ:
- Status Request
Where aa = ADC Status
dd = DAC Status
ss = Internal Status
- STA:aa_dd_ss
STK:
- Stack Dump
- STK: aaaa, then 6 lines Sadd:data
Where aaaa= current Stack Pointer,
add is memory address starting at 0800(hex)
and data is 16 bytes of data, each byte shown as 2 hex digits
UNL:
- Unlock Front Panel
UID:
- Unit ID Request
VER:
- Firmware Version Request
- Memory, then 10 lines
Madd:data
Where add is memory address starting at 060(hex)
and data is 16 bytes of data, each byte shown as 2 hex digits
- ACK:
- ACK:
- UID:ADDA2
- VER:1.23 or BOOT:1.23
Error messages
The following error messages can be returned for illegal commands
Err:01
Err:02
Err:04
16
- return if Command Not Found
- return if Missing Parameter
- return if Parameter out of range
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2
Upgrading Firmware
Occasionally, it may be necessary to upgrade the firmware on the RB-ADDA2 to add new
functionality and fix software bugs. New firmware updates will be made available from time
to time on the Sonifex website. Visit www.sonifex.co.uk for details.
Please note: Firmware files can take several minutes to transfer to the RB-ADDA2 at lower
baud rates. To speed up the process, select a higher baud rate prior to transferring the new
firmware.
Technical Specification RB-ADDA2
A/D Connections
Analogue Inputs:
2 x XLR 3 pin (balanced) (L & R)
2 x RCA phono (unbalanced) (L & R)
Digital Outputs:
1 x AES/EBU XLR 3 pin plug
1 x S/PDIF RCA phono socket
1 x TOSLink optical output
Sync Inputs:
1 x AES/EBU XLR 3 pin female
1 x Word Clock BNC
A/D Audio Specification
Maximum Input Level:
+27dBu (balanced inputs)
Maximum Input Level:
+17dBu (unbalanced inputs)
Input Impedance:
>10kΩ bridging (balanced inputs)
Input Impedance:
>20kΩ (unbalanced inputs)
Input Levels:
Switchable +24dBu/+18dBu/+12dBu for FSD (on bal inputs)
Gain Range:
Adjustable 3dB loss to 3dB gain (L and R adjust)
Signal to Noise:
Better than –113dbFS (RMS A-weighted at 24bit)*
Dynamic Range:
Better than -110dB*
Distortion and Noise:
Better than -100dB THD + N at 1kHz*
Cross-talk:
Better than -112dB (20Hz to 20kHz)*
DI G I TAL AU DIO CONVERTERS - RB -ADDA2
The firmware is upgraded using the Serial Control Interface - SCI. This PC software
downloads the new firmware and initiates the upgrade process. To upgrade the firmware,
select the required firmware file in the SCI upgrade firmware section. The RB-ADDA2 will
automatically reboot and enter the bootstrap mode prior to the transfer of the firmware file.
The SCI software downloads the firmware to internal memory, and then erases the current
firmware before programming the update. When the firmware is complete, the unit reboots
with the new firmware.
* Measured using balanced inputs
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D I G I TA L AUDIO CONVERTERS
A/D Operational Controls
Analogue Input Source:
Balanced XLRs or unbalanced phonos, via
A/D SOURCE push-button
D IGITAL AUDIO CONVERTERS - RB -ADDA2
Analogue Input Level for FSD: +12dBFS, +18dBFS or +24dBFS, via A/D
SOURCE push-button
Analogue Input Level
+9dBu to +27dBu via rear-panel
Adjust:
+3dB via pre-set pots
Sample Frequency Rates:
32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or
192kHz, via FREQUENCY push-button
Bit Depth:
16, 20 or 24 bits, via BITS push-button
Channel Status Bits:
Consumer mode, professional mode or follow input, via
CS DATA push-button
Sync Input Select:
AES/EBU, Word Clock or D/A input, via SYNC push-button
Sync Mode Select:
Master, slave, auto, auto lock, via SYNC push-button
D/A Connections
Digital Inputs:
1 x AES/EBU XLR 3 pin female
1 x S/PDIF RCA phono
1 x TOSLink optical input
Analogue Outputs:
2 x XLR 3 pin male (balanced) (L & R)
2 x RCA phono (unbalanced) (L & R)
D/A Audio Specification
Max Output Level:
+24dBu (balanced outputs)
Max Output Level:
+14dBu (unbalanced outputs)
Output Impedance:
<50Ω (balanced outputs)
Output Impedance:
<75Ω (unbalanced outputs)
Gain Range:
Selectable 12dBu, 18dBu or 24dBu output level,
ref FSD (on balanced inputs)
Signal to Noise:
Better than -106dB (RMS A-weighted at 24 bit)*
Dynamic Range:
Better than-100dB*
Distortion and Noise:
Better than -85dB THD +N at 1kHz*
Cross-talk:
Better than -112dB (20Hz to 20kHz)*
* Measured at balanced outputs
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2
Other Connections
Mains Input:
Universal filtered IEC, continuously rated 85-264VAC @4763Hz, max 10W
Serial Port:
RS232 9 Pin D-type socket
D/A Operational Controls
AES/EBU, S/PDIF or TOSlink optical, via D/A SOURCE pushbutton
Analogue Output
Level for FSD:
Selectable +12dBu, +18dBu or +24dBu output level, ref
FSD, via D/A SOURCE push-button
Equipment Type
RB-ADDA2
Combined A/D and D/A converter, 24 bit 192kHz
Physical Specifications
Dimensions (Raw)
48cm (W) x 15.8cm (D*) x 4.2cm (H) (1U)
Dimensions (Boxed)
53cm (W) x 25.5cm (D*) x 6cm (H)
Weight
Nett: 1.6kg Gross: 2.3kg
* Note that this product is deeper than standard Redboxes.
Redbox User Handbook No 1
DI G I TAL AU DIO CONVERTERS - RB -ADDA2
Digital Input Select:
19
3
D I G I TA L AUDIO CONVERTERS
3 RB-SC1 Sample Rate Converter
Introduction
D IGITAL AUD IO CONVERTE RS - RB -S C1
Fig 3-1: RB-SC1 Front Panel
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.
If synchronising to an external signal there are several modes causing different actions in
case of loss of the synchronising signal.
There are also switches available to define the content of the channel status bits embedded
within the digital audio stream.
System Block Diagram
Digital
Input
AES/EBU
Digital
Source
Select
AES
Receiver
SPDIF
Sample
Rate
Converter
AES
Transmitter
SPDIF
Conversion
Clock
Digital Sync
Input
AES/EBU
Clock
Master
Clock
Generator
SPDIF
Word
Clock
Digital Sync
Select
Digital
Digital Send Output
Select
AES/EBU
AES
Receiver
Frequency
Select
Fig 3-2: RB-SC1 System Block Diagram
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3
Front Panel Indicators
Front Panel LED
The LED on the front panel is normally red to indicate that power is present on the unit.
However, it also has a secondary role to indicate the status of the digital inputs
Fast flashing between red and amber – indicates a loss of digital input signal.
Slow flashing between red and amber - when not in master mode this indicates the absence
of a synchronising input.
Rear Panel Connections and Operation
Status
Select
Switches
S/PDIF AES/EBU AES/EBU S/PDIF
Input Audio
Sync
Sync
Output Input
Input
S/PDIF
Output
Digital Digital
Input Output
Select Select
Button Button
Frequency and Sync Mode
Rotary Switch
Word-Clock
Sync Input
Digital
Sync Input
Select
Button
Fig 3-3: RB-SC1 Rear Panel
Inputs and Outputs
AES/EBU Inputs
The digital source and digital sync XLR 3 pin sockets both have an impedance of 110 ohms.
They have the following connections:
DI G I TAL AU DIO CONVERTERS - RB -SC1
AES/EBU
Audio
Input
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on these connectors should meet the IEC 60968 specification
S/PDIF Inputs
The digital source and digital sync S/PDIF phono inputs both have an impedance of 75Ω.
Word Clock Input
The BNC TTL word clock input has an impedance of 50Ω.
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D I G I TA L AUDIO CONVERTERS
AES/EBU Output
The digital output 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
The signals on this connector will comply with the IEC 60968 specification
D IGITAL AUD IO CONVERTE RS - RB -S C1
S/PDIF Output
The digital output S/PDIF phono output has an impedance of 75 ohms.
Rear Panel Controls
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 (switch 3).
The channel status bits will be forced to Professional Mode for the highest 3 sample rates
as they are not supported by consumer mode. For the lowest three rate these status bits
can be either set to follow the input signal type (switch 1 off ) or can be forced to either
professional or consumer mode (switch 1 on and switch 2 either off or on). These settings
are summarised in Fig 3-4 and are also on top of the unit.
Status Select Switch Settings
1
On
Force channel status type to...
1
Off
Follow input
2
On
Professional output
2
Off
Consumer output
3
On
Digital sync
3
Off
Word-clock sync
Fig 3-4: RB-SC1 Status Switches
Digital Input 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,
the digital sync input and the digital output
Frequency and Sync Mode Rotary Switch
This rotary switch is used to select the synchronisation mode and to select the frequency of
the digital output when using the on-board clock generator. There are 4 modes of operation
:- Master mode, Auto Sync Mode, Auto Lock Sync Mode & Slave Mode.
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DIGITAL AUDIO CONVERTERS
3
In Master sync mode, switch positions 0 – 5, the digital output sample rate is simply set by,
and locked to, the internal on-board clock generator. No sync signal is used or required.
In Auto sync mode, switch positions 6– B, the digital output sample rate follows the sync
input. When the sync signal is not present the output sample rate will be set by, and locked
to, the internal on-board clock generator at a frequency determined by the switch position.
In Auto-Lock sync mode, switch position C, no output will be generated until lock is
achieved with a sync signal. The digital output sample rate now follows the sync input. 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.
Fig 3-5, also printed on the top of the unit, summarises the rotary switch settings and shows
the sample rate generated by the internal clock generator in master and auto sync modes.
Frequencies and Sync Modes
Rotary
Switch
Number
Mode
Sample
Frequency
(kHz)
0
Master
32
1
Master
44.1
2
Master
48
3
Master
64
4
Master
88.2
5
Master
96
6
Auto
32
7
Auto
44.1
8
Auto
48
9
Auto
64
A
Auto
88.2
B
Auto
96
C
Auto Lock
-
D
Slave
-
DI G I TAL AU DIO CONVERTERS - RB -SC1
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.
Fig 3-5: RB-SC1 Frequency and Sync Rotary Switch Settings
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D I G I TA L AUDIO CONVERTERS
Technical Specifications RB-SC1
D IGITAL AUD IO CONVERTE RS - RB -S C1
Audio Specification
Dynamic Range:
120dB
Distortion & Noise:
-114dB THD + N at 1kHz, ref 0dB FS
Sample Freq Range:
30kHz – 100kHz
Bit Depth:
Up to and including 24 bits.
Connections and Controls
Audio Inputs:
1 x AES/EBU XLR 3 pin female
1 x S/PDIF RCA phono female
(Input button select between AES/EBU and S/PDIF)
Sync Inputs:
1 x AES/EBU XLR 3 pin female
1 x S/PDIF RCA phono female
1 x TTL BNC female
(Input button select between AES/EBU and
S/PDIF, and DIP switch select between TTL and
either of the other two)
Outputs:
1 x AES/EBU XLR 3 pin male
1 x S/PDIF RCA phono female
(Output button select between AES/EBU and S/PDIF);
Mains Input:
Filtered IEC, continuously rated 85-264VAC @47-63Hz,
max 10W
Operational Modes:
Master mode, auto sync mode, auto lock mode and slave
mode, set via rotary switch
Status bits:
Forced to consumer mode, professional mode, or set to
follow input
Equipment Type
RB- SC1
Sample rate converter
Physical Specifications
24
Dimensions (Raw)
28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
Dimensions (Boxed)
36cm (W) x 20.5cm (D) x 6cm (H)
Weight
Nett:
1.0kg
Gross: 1.4kg
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DIGITAL AUDIO CONVERTERS
4
4 RB-DAC1 Digital to Analogue Converter
Introduction
Fig 4-1: RB-DAC1 Front Panel
The analogue outputs have an output level control, allowing full-scale settings selectable
from +12dBu, +18dBu or +24dBu. De-emphasis on the output can be enabled via
dipswitch.
There is a button to select either the AES/EBU or S/PDIF input for the D/A converter, which is
located on the rear panel.
When operating, the front panel power LED flashes whenever the unit is not synchronised
to the incoming digital signal.
System Block Diagram
Volume Control
Stereo
Headphone
Output
AES/EBU
Digital
Input
S/PDIF
L
Professional
R Output
Digital Source
Selector
AES
Receiver
DAC
L
R
Consumer
Output
DI G I TAL AU DIO CONVERTERS - RB -DAC 1
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.
Fig 4-2: RB-DAC1 System Block Diagram
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D I G I TA L AUDIO CONVERTERS
Front Panel Indicators & Controls
Sync & Power
Indicator
Headphone Volume
Output
Control
DIGITAL AUD IO CONVERTERS - RB -DAC1
Fig 4-3: RB-DAC1 Front Panel
Sync & Power Indicator
The LED on the front panel is normally red to indicate that power is present on the unit.
However, it also has a secondary role to indicate the status of the digital inputs :
Flashing between red and amber – indicates a loss of a valid digital input signal.
Headphone Output
The output available on the front panel through a ¼” stereo jack socket, is designed to drive
150 mW into 32Ω to 600Ω professional headphones.
Volume Control
The headphone output has its own volume control, which is independent of the level
adjustment for the main outputs, and has a maximum output level of +12dBu.
Rear Panel Connections and Operation
Analogue
Outputs (L&R)
RCA Phono
Outputs (L&R)
Fig 4-4: RB-DAC1 Rear Panel
26
AES/EBU
Input
S/PDIF
Input
Full Scale
Digital Select
Digits and
Button
De-emphasis
Switches
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DIGITAL AUDIO CONVERTERS
4
RB-DAC1 Inputs
AES/EBU Input
The digital input XLR 3 pin socket has an impedance of 110Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector should meet the IEC 60968 specification
RB-DAC1 Outputs
Analogue Outputs (Left and Right)
The XLR 3 pin output plug connectors are electronically balanced with an output
impedance of less than 50Ω. They have the following connections:
Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
RCA Phono Outputs (Left and Right)
These RCA (phono) outputs are unbalanced and have an output impedance of less
than 75Ω.
Rear Panel Controls
Full Scale dB Settings
Switch Number
+12
+18
+24
1
2
OFF
ON
ON
OFF
OFF
ON
Emphasis Settings
3
ON
De-emphasis On
3
OFF
De-emphasis Off
4
DI G I TAL AU DIO CONVERTERS - RB -DAC 1
S/PDIF Input
The S/PDIF digital phono input has an impedance of 75Ω.
Reserved
Fig 4-5: RB-DAC1 Full Scale Digits and De-emphasis Settings Switches
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. The consumer output on the phono connector has a further 8½dBu
attenuation incorporated.
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D I G I TA L AUDIO CONVERTERS
De-emphasis Switch
If de-emphasis is selected (switch 3) the RB-DAC1 will decode 50/15µs emphasis when
indicated by certain channel status bits in the incoming digital audio data.
Digital Select Button
This button is used to switch the digital input from the AES/EBU XLR connector (button out)
to the S/PDIF phono connector (button in).
DIGITAL AUD IO CONVERTERS - RB -DAC1
Technical Specifications RB-DAC1
28
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
Audio Specification
Max Output Level:
+24dBu (balanced outputs)
+14dBu (unbalanced outputs)
+12dBu (headphone outputs)
Output Impedance:
<50Ω (balanced outputs)
<75Ω (unbalanced outputs)
Dynamic Range:
>100dB
Noise & Distortion:
<0.01% THD + N @1kHz
Sample Freq Range:
30kHz – 100kHz
Gain Range:
Selectable 12dBu, 18dBu or 24dBu output level, ref. FSD
Headphones:
Drives 150 mW into 32Ω to 600Ω headphones
Max Output Level:
+12dBu
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DIGITAL AUDIO CONVERTERS
4
Operational Controls
Digital Input Select:
AES/EBU or S/PDIF, via push-switch
Gain Select:
Selectable 12dBu, 18dBu or 24dBu output level,
ref. FSD
De-emphasis On/Off:
Dipswitch
Equipment Type
Digital to Analogue Converter
Physical Specifications
Dimensions (Raw)
48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
Dimensions (Boxed)
53cm (W) x 20.5cm (D) x 6cm (H)
Weight
Nett:
Redbox User Handbook No 1
1.4kg
Gross:
2.0kg
DI G I TAL AU DIO CONVERTERS - RB -DAC 1
RB-DAC1
29
5
D I G I TA L AUDIO CONVERTERS
5 RB-SP1 Digital Splitter & Combiner
Introduction
D IGITAL AUD IO CONVERTE RS - RB -S P1
Fig 5-1: RB-SP1 Front Panel
The RB-SP1 Digital Splitter & Combiner is used to interface various double sampling pieces
of equipment. Some older equipment uses 2 AES/EBU connectors for double sampling with
each connector carrying an audio signal at a normal frame rate, whilst other equipment
has a single connector using twice the frame rate. The RB-SP1 can interface between them,
either combining the signals from 2 XLR’s into 1, or splitting the signal from 1 XLR into 2.
The RB-SP1 can also be used for interfacing stereo and mono signals to digital mixing desks
by splitting the left and right signals of a stereo XLR to two separate XLR’s, and vice versa by
combining them.
Additionally, a sample rate converter on the second digital input can be used to convert
the sample rate of the secondary input to that of the primary input. The RB-SP1 can handle
sample rates up to 96kHz and sample sizes of 16, 20 and 24 bit.
There are two types of operation : Split 96, and Stereo/Mono. These each have three
different switch modes : Split, Bypass and Combine.
Both inputs and outputs can be selected as either AES/EBU or S/PDIF with the resultant
digital level following the switch selection.
System Block Diagram
Digital
Input
Select
Receiver
Transmitter
Router
Digital
Input 1
Digital
Output 1
Digital
Input 2
Combine & Bypass Mode Only
Digital
Output
Select
Digital
Output 2
Receiver
& SRC
Transmitter
Split Bypass Mode Only
Fig 5-2: RB-SP1 System Block Diagram
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5
Front Panel Indicators & Controls
Fig 5-3: RB-SP1 Front Panel
The three LED’s grouped together on the right hand side have two roles, see Fig 5-3. The
first is to indicate the synchronisation frequencies of the incoming digital signals, and the
second is to flash when a signal has been lost. These indicators are labelled individually to
show the current sync frequencies.
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. To do this, Split 96 uses two digital signals running at 48kHz, where
both sub-frames of a single 48kHz stream are used to carry information about a mono
signal, with the resultant signal of both 48kHz streams being equivalent to a stereo 96kHz
signal. The unit will also perform the same function for 88.2kHz stereo and 44.1kHz double
sampled signals.
•
In Split Mode a single stereo 96kHz signal is received into input 1 which is then
output as two separate 48kHz signals. Output 1 will contain just left channel data and
output 2 will contain just right channel data. If the signal from the input disappears
then both Outputs will be muted.
•
In Combine Mode two 48kHz double sampled input signals are combined to create a
single 96kHz signal on output one. If either input 1 or 2 are lost then the output will be
muted. In this mode output 2 will always be muted.
DI G I TAL AU DIO CONVERTERS - RB -SP1
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.
Stereo/Mono – This allows a digital stereo signal to be separated into two mono digital
signals and vice-versa.
•
In Split Mode a single stereo digital signal is routed to two digital outputs. Output
1 will contain the original left channel data on its left output and a muted signal on
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5
D I G I TA L AUDIO CONVERTERS
its right output. Output 2 will contain the original right data on its left output and a
muted signal on its right output. This mode can be altered by the dipswitch settings,
to a channel swap mode or a dual mono mode. These are described in more detail in
the Rear Panel Controls section below.
In Combine Mode two mono signals are combined to create a single stereo signal.
Output 1 will contain the input 1 left channel data on its left channel and input 2 left
channel data on its right channel. This mode can be altered by a dipswitch setting, as
with the split mode. Where either the left or right channel data of input 2 is output on
the right channel data of the output. If the two signals are of different sample rates,
a sample rate converter can be switched in place to convert the sample rate of input
channel 2 to that of input channel 1. In the Stereo/Mono Combine mode, output 2 is
always muted.
D IGITAL AUD IO CONVERTE RS - RB -S P1
•
Bypass Mode – In Bypass mode, input 1 is routed to output 1 and input 2 is routed to
output 2. Input 1 is used as the master clock input. If input 2 is at a different sample rate
to input 1 then input 2 is sample rate converted to match input 1. If the signal from input
2 is lost then output 2 will be muted. However, if the signal from input 1 is lost then both
outputs will be muted and will only return once a signal is present on input 1.
Note that when the unit is operating in Bypass Mode the Type switch is ignored.
Split 96
Split
L
R
I/P 1
48kHz double sampled
L
L
I/P 1
48kHz double sampled
R
R
I/P 2
96kHz
O/P 1
L
L 48kHz double sampled
O/P 2
R
R 48kHz double sampled
O/P 1
L
96kHz
R
Combine
SRC
Dipswitch 3
Off
Split
Any Sample Rate
L
R
O/P 1
L
Mute
L
L
O/P 2
R
Mute
Mute
R
I/P 1
Dipswitch 1
Off
Combine
32
Sample Rate 1
L
X
I/P 1
O/P 1
I/P 2
Dipswitch 3
On
L
R
Dipswitch 1
On
R
R
Dipswitch 3
On
Redbox User Handbook No 1
Sample Rate 1
R
Combine
48kHz
double sampled
L
L
I/P 1
R
L
R
L
I/P 2
I/P 1
R
R
I/P 2
L
R
I/P 1
L
R
I/P 1
L
X
I/P 1
R
L
X
X
I/P 2
I/P 1
R
X
I/P 2
48kHz double sampled
48kHz double sampled
Stereo/Mono
48kHz
double sampled
O/P 2
DIGITALO/P
AUDIO
CONVERTERS
1 L
R
SRC
O/P 1
SRC
Any Sample Rate
Split
Any Sample Rate
O/P
O/P 2
1
O/P 2
Combine
Sample Rate 1
Combine
Sample
Sample Rate
Rate 2
1
Sample Rate 2
X
R
Dipswitch 1
On
Dipswitch 1
Off
Dipswitch 1
On
Dipswitch 1
Off
X
R
O/P 1
SRC
96kHz
O/P 1
L
Dipswitch 3
On
L
Mute 3
Dipswitch
Off
L
Dipswitch
3
On
R
L
Mute
Mute
Mute
L
R
L
Dipswitch 1
Off
Dipswitch 1
On
Dipswitch 3
On
Dipswitch 1
Off
Dipswitch 1
On
Dipswitch 3
On
R
Mute
Mute
R
Sample Rate 1
L
R
Sample
1
X
= InputRate
Ignored
X = Input Ignored
L
R
I/P 1
O/P 1
L
R
Sample
Sample Rate
Rate 2
1
L
L
R
R
I/P 2
I/P 1
O/P
O/P 2
1
L
L
R
R
Sample Rate 2
L
R
I/P 2
O/P 2
L
R
SRC
Sample Rate 1
Sample Rate 1
Fig 5-4: RB-SP1 Type and Mode Flow Diagrams
Rear Panel Connections and Operation
Digital Input &
Output Select
Buttons
S/PDIF
Inputs
R
R
L
R
Bypass
Sample
Rate 1
AES/EBU
Inputs
R
R
SRC
SRC
AES/EBU
Outputs
5
L
96kHz
R
Dipswitch 3
Off
O/P 1
Split
R
R 48kHz double sampled
Mode Select
Dip Switches
DI G I TAL AU DIO CONVERTERS - RB -SP1
Combine
S/PDIF
Outputs
Fig 5-5: RB-SP1 Rear Panel
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D I G I TA L AUDIO CONVERTERS
Inputs and Outputs
AES/EBU Inputs
The digital source XLR 3 pin sockets have an impedance of 110Ω. They have the following
connections and meet the IEC 60968 specification:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
D IGITAL AUD IO CONVERTE RS - RB -S P1
S/PDIF Inputs
The digital source RCA phono inputs both have an impedance of 75Ω.
AES/EBU Outputs
The digital output XLR 3 pin plugs have an impedance of 110Ω. They have the following
connections and meet the IEC 60968 specification:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
S/PDIF Outputs
The digital output S/PDIF phono outputs have an impedance of 75Ω.
Rear Panel Controls
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.
Mode Select Dip Switches
RB-SP1 Mode Select Settings
1
ON
Input 1 Channel B = Output 2 Channel B in Stereo/Mono Split Mode
1
OFF
Input 1 Channel B = Output 2 Channel A in Stereo/Mono Split Mode
2
ON
SRC Enabled
2
OFF
SRC Disabled
3
ON
Dual Mono in Stereo/Mono Split Mode
3
OFF
Single Mono in Stereo/Mono Split Mode
4
Reserved
Fig 5-6: RB-SP1 Mode Select Dip Switches
Altering the Stereo/Mono Split/Combine Mode – In Split mode With switch 1 off, channel
A (Left) and B (Right) on the input are transferred to channel A (Left) of outputs 1 and 2
respectively. With switch 1 on, channel A (Left) on the input is transferred to channel A (Left)
on output 1 and channel B (Right) on the input is transferred to channel B (Right) of output
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2. With switch 3 on (switch 1 is ignored), channel A (Left) is transferred to both channels on
output 1 and channel B (Right) on the input is transferred to both channels on output 2.
In Combine mode with switch 1 off, channel A (Left) on input 1 is transferred to channel
A (Left) of output 1, and channel A (Left) on input 2 is transferred to channel B (Right) of
output 1. With switch 1 on channel A (Left) on input 1 is transferred to channel A (Left) of
output 1, and channel B (Right) on input 2 is transferred to channel B (Right) of output 1.
Technical Specifications RB-SP1
Audio Specifications
Input Impedance:
110Ω ± 20% balanced (AES/EBU)
Input Impedance:
75Ω ±5% unbalanced (S/PDIF)
Output Impedance:
110Ω ± 20% balanced (AES/EBU)
Output Impedance:
75Ω ±5% unbalanced (S/PDIF)
Signal Level
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)
Connections
Audio Inputs:
DI G I TAL AU DIO CONVERTERS - RB -SP1
Switching on the Sample Rate Converter - Switch 2 is used to turn the sample rate
converter on, or off and can be used in all modes. When there are two inputs connected
to the unit which are at different sample rates or which need to be synchronised, then the
sample rate converter should be switched on. If it is not, then you may suffer from missed
samples and bit errors affecting the signal output. If the sample rates of the incoming
signals are always going to be the same and are synchronised, then switch the sample rate
converter off, as leaving it on will worsen the output signal (signal jitter will increase).
2 x AES/EBU XLR 3 pin female
2 x S/PDIF RCA phono female
(Input button select between AES/EBU and S/PDIF)
Audio Outputs:
2 x AES/EBU XLR 3 pin male
2 x S/PDIF RCA phono female
(Output button selects between AES/EBU and S/PDIF)
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D I G I TA L AUDIO CONVERTERS
Mains Input:
Filtered IEC, continuously rated
85-264VAC @ 47-63Hz max 10W
9.5.3. Equipment Type
DIGITAL AUDIO CONVERTE RS - RB -S P1
RB-SP1
36
Digital splitter & combiner
9.5.4. Physical Specifications
Dimensions (Raw)
48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
Dimensions (Boxed)
53cm (W) x 20.5cm (D) x 6cm (H)
Weight
Nett:
1.6kg
Gross:
2.2kg
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6 RB-DS2 Audio Delay Synchroniser
Introduction
Fig 6-1: RB-DS2 Front Panel
The RB-DS2 has both balanced analogue and AES/EBU digital audio inputs and outputs on
3 pin XLR connectors. It can act as a combined A/D and D/A unit meaning that analogue
inputs can be delayed and output as AES/EBU and vice-versa. It is a stereo delay, but can
also be used as a dual mono delay to process each audio path separately, or as a mono delay
using the left inputs and outputs.
As standard the RB-DS2 can provide up to 10.5 seconds of delay at 96kHz sampling, 24
bit (42 secs at 48kHz, 16 bit). An internal Compact Flash™ expansion allows up to 2GB of
memory to be accessed providing delay times of over 3.5 hours, for example, to delay a
programme output across different time-zones, or to shift a broadcast programme by
1 hour for a satellite rebroadcast. Delay times can be selected in samples, fields, frames,
milliseconds and, with the Compact Flash™ expansion, in hh:mm:ss. Frame and field
definitions can be for PAL (25 frame) or NTSC (30 frame) signals.
A front panel blue vacuum fluorescent display with rotary controller is used for selecting
the various settings of the delay, which include the source (analogue or digital), channels,
sample rate, sample bit width, format (PAL or NTSC), delay units and the delay itself.
Additionally, input peak digits can be selected from +12dBu, +18dBu and +24dBu for FSD
and two left and right pre-set potentiometers on the rear panel allow the input gain range
to be altered by ±3dB around the selected peak digits.
The analogue output gain range can be altered in software from -6dBu to +24dBu output
level, ref FSD.
Both analogue and digital outputs can be separately muted and a front panel Bypass button
disengages electro-mechanical relays to divert both analogue and digital inputs to their
outputs. This is also disengaged automatically when a power-fail occurs.
All of the settings in the unit can be saved to one of 8 configuration settings. These Configs
can be viewed, edited, saved and loaded, and also remotely loaded by using one of the
8 GPI contacts, meaning that any setting, such as delay time or Bypass, can be altered
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S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -D S 2
The RB-DS2 is a stereo audio delay synchroniser used for resynchronising audio to video
following delay processes such as standards conversion, transmission delay, logo insertion,
video aspect ratio conversion and network delays. It can be used for fixed installations
to correct a permanent audio delay, or on an intermittent basis to provide occasional
correction, for example for live links. Accepting digital audio signals up to 96kHz, 24 bit, the
sonic quality of the RB-DS2 is superb and silent switching is used to provide the smoothest,
cleanest audio delay available.
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instantaneously using a GPI signal. The RB-DS2 also has an RS232 serial port for remotely
controlling the unit and there are 4 remote outputs which can be used for signalling. The
front panel controls can be locked-out for situations where remote control is being used to
run the unit, or where physical security is required.
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -DS 2
Extended Mode using Compact Flash™
Extended mode allows the delay synchroniser to provide audio delays in excess of 3.5
hours so that the unit can act as a broadcast time-zone delay. The memory card slot is
internally mounted and currently supports Compact Flash™ cards up to 2Gbytes. The delay
synchronizer uses the DOS format with a 16bit FAT. If a Compact Flash™ memory card is
installed in the internal card slot, the status of the card will be indicated in the lower right
side of the display. If the card is not formatted, or the format is corrupted, the display will
show “NOFMT” indicating that the card cannot be written to until it has been formatted (see
System Menu: Memory Card for details on formatting the card). When the card is correctly
formatted, the capacity is shown in Mbytes.
The delay synchronizer generates a file on the Compact Flash™ memory card, prior to
starting the delay process, which effectively reserves all the space available and provides for
the largest possible delay. If the Compact Flash™ memory card was removed and placed in
a PC card reader, the file, named “RB-DS2.WAV”, would play using any utility that’s supports
Broadcast Wave Format - PCM files.
Note: Extended Mode can only be used for mono and stereo CHANNELS settings, not for
dual mono signals.
System Block Diagram
AES/EBU
AES/EBU
Digital
Bypass
Control
Digital
Input
AES
Receiver
Digital
Bypass
Control
AES
Transmitter
Digital
Output
Recovered
Clock
Master
Clock
Generator
Source
select &
Delay Control
Professional
Balanced
AES/EBU
L
L
Analogue
Bypass
Control
Gain
ADC
DAC
Gain
R
Analogue
Bypass
Control
R
Analogue
Inputs
Gain
Gain
Analogue
Outputs
Fig 6-2: RB-DS2 System Block Diagram
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Front Panel Controls
All of the RB-DS2’s configurations can be accessed with the single front panel mounted
rotary control in conjunction with the vacuum fluorescent display.
CONTROL
SELECT MENU
HOLD
SELECT DELAY
Setting the Delay
To adjust the delay, lightly press the rotary CONTROL to enable the delay select mode. A
solid line will appear under the selected digit. To change the selected digit, turn the rotary
control. When configured for dual mono operation, the selection highlight will move
between left and right channel delay values. Once the required digit is highlighted, press
the rotary control to switch to delay edit mode. The highlight under the selected digit will
begin to flash indicating that delay edit mode is enabled. The value of the selected digit
can be changed, by turning the rotary control. When the selected digit is set to the required
value, press the rotary control again to return to the delay select mode. A different digit can
now be selected. If no further digit is selected, delay select mode will be disabled and the
selection highlight will disappear after 2.5 seconds.
Changes to the delay are implemented dynamically. If the selected delay value exceeds the
amount of audio data that has been stored, the analogue and digital outputs will be muted
until the required delay has been acquired. The audio will then be presented at the outputs.
In extended mode, where the memory card installed in the internal Compact Flash™ Storage
Card Slot is used, delay periods can be in excess of 1 hour. During acquisition of long delays
in extended mode, a progress bar is displayed to give an indication of when the audio
output will start. The size of the progress bar decreases as the delay is acquired.
The delay value that can be set cannot exceed the maximum delay for the selected mode.
For example, for an analogue input sampled at 96kHz, 24bit, using 25fps, the maximum
delay in frames for normal mode is 268 (see figures 4, 5 and 6 for maximum delay values).
Selecting The Main Menu
The RB-DS2’s configuration options are accessed from the main system menu. To access
the main system menu, press and hold the rotary CONTROL for at least 1.5 seconds. The
menu structure is arranged in a multi-tiered format with several menu items providing
access to sub-menus. To select a menu item, turn the rotary control until the required item
is highlighted, then press the rotary control to select the item. Each configuration is shown
as a list of available options. The currently selected option will be shown with a tick along
side it. The last item shown in each menu is CLOSE. Selecting close exits the system menu
and returns to the main display. In each sub-menu, the penultimate item shown is BACK.
Selecting back displays the previous menu.
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Fig 6-3: Front Panel CONTROL
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Bypassing The Delay
The Bypass button enables the delay bypass mode, which internally connects the inputs to
outputs in both the analogue and digital domains. The Bypass button is illuminated when
the delay bypass mode is enabled. When power is removed from the unit, the bypass mode
is automatically enabled.
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -DS 2
System Reset
A single LED on the left side of the front panel indicates that power is applied to the unit.
The system reset button is accessible through the small aperture to the right of the
power LED.
40
Rear Panel Connections and Operation
Fig 6-4: RB-DS2 Rear Panel
XLR Analogue Inputs (Left and Right)
The XLR 3 pin sockets used for the left and right channel analogue inputs are electronically
balanced and have an impedance greater than 10kΩ bridging. Each XLR has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
Analogue Input Adjustment
The Input Peak Digits setting (see System Menu: Volume) sets the analogue input gain for
full-scale digits in the digital domain. The preset potentiometers next to the analogue inputs
allow an additional adjustment of this value by ±3dB.
AES/EBU Input
The digital input XLR 3 pin socket has an impedance of 110Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector should meet the IEC 60968 specification.
XLR Analogue Outputs (Left and Right)
The XLR 3 pin output plugs are electronically balanced with an output impedance of less
than 50Ω. They have the following connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
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AES/EBU Output
The digital output XLR 3 pin plug has an impedance of 110Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector comply with the IEC 60968 specification.
Pin 9: Signal ground
Pin10: Open collector output 1
Pin11: Open collector output 2
Pin12: Open collector output 3
Pin13: Open collector output 4
Pin14: Open collector output 5
Pin15: Open collector output 6
RS232
The 9-way ‘D’ type socket connector allows direct connection to a serial port on a PC via a
pin-to-pin cable. See the section on Serial Port Control for details of this interface. It has the
following connections:
Pin 1: n/c
Pin 2: Transmit data (TxD)
Pin 3: Receive data (RxD)
Pin 4: n/c
Pin 5: Ground
Pin 6: n/c
Pin 7: Clear To Send (CTS)
Pin 8: Request To Send (RTS)
Pin 9: n/c
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Remote Inputs and Outputs
The 15-way ‘D’ type socket connector presents 8 active low inputs and 6 open collector
outputs. The inputs are used to remotely select one of 8 configuration setups (see System
Menu: Setups) when the Remote Loading function is enabled. The outputs are not currently
used. It has the following connections:
Pin 1: Active low input 1
Pin 2: Active low input 2
Pin 3: Active low input 3
Pin 4: Active low input 4
Pin 5: Active low input 5
Pin 6: Active low input 6
Pin 7: Active low input 7
Pin 8: Active low input 8
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The Default Screen
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -DS 2
The default screen (Fig 6-5) shows the current selections for audio source, sample rate, delay
units and delay. In stereo mode, the delay is common to both left and right channels. In dual
mono mode, the delay for the left and right channels is shown separately as each channel is
delayed individually. Also shown on the main screen is the mute status of the analogue and
digital outputs and the currently selected frame rate and sample size. All of the Audio Delay
Synchronisers’ settings are configured from the main system menu with the exception of the
actual delay. The delay is adjusted directly from the main screen following the instructions
on page 39.
SOURCE:
RATE:
DELAY:
L+R:
ANALOGUE
48KHZ
SAMPLES
0004800
A
D
25FPS
24BIT
Fig 6-5: The Default Screen
The Main Menu
To access the main menu, press and hold the rotary CONTROL knob and follow the
instructions on page 39.
MAIN MENU
MODE
SOURCE
CHANNELS
SAMPLE RATE
SAMPLE WIDTH
FORMAT
DELAY UNITS
VOLUME
SETUPS
MEMORY CARD
CONTROL LOCK
SYSTEM
CLOSE
Fig 6-6: The Main Menu
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Mode
This option selects which memory is used for the audio delay process. From the main
system menu select MODE. The available options are NORMAL and EXTENDED USING CF.
Changing the mode will force the analogue and digital audio outputs to be muted as the
current delay duration is reset and the delay is acquired on the new media. See figures 3, 4
and 5 for the maximum delays in each mode.
Normal – This mode selects the internal RAM to be used for the delay process. The size
of the internal memory used is 8232960 bytes.

Extended Using CF – This mode selects the Compact Flash™ memory card loaded
in the internal memory card slot. The internal memory card slot currently supports
Compact Flash™ cards up to 2Gbytes. If the Extended mode is selected with
no Compact Flash™ memory installed, a message box will be display and the
audio output will not be interrupted.
The default mode is Normal.
Source
This option selects which input is used for the audio delay process. From the main system
menu select SOURCE. The available options are ANALOGUE, ANALOGUE SYNC and DIGITAL.
The delayed audio appears at both the analogue and digital outputs regardless of the input
source selected.

Analogue – This selects the audio at the analogue inputs as the source for the delay.
The input is sampled and delayed using the selected sample rate generated from an
internal master clock. The digital input is not used.

Analogue Sync – This selects the audio at the analogue inputs as the source for the
delay. The input is synchronised to the digital audio sync signal at the digital input
and the analogue and digital audio outputs will be muted until a valid sync signal is
detected. Once a valid sync signal has been received and the delay process starts, any
subsequent loss of sync signal will force the unit to revert to an internally generated
master clock rate as near as possible to the last sync signal received.

Digital – This selects the audio at the digital input as the source for the delay. With no
digital signal applied, the analogue and digital audio outputs will be muted. Once a
valid digital input is received, the unit locks to this signal and the delay process starts.
Any change of sample rate on the digital input signal will force the unit to stop the
delay and mute the analogue and digital outputs. The delay will then restart once the
new sample rate has been validated. The analogue inputs are not used.
The default source is analogue.
Channels
This option selects how the left and right channels are used. From the main system menu
select CHANNELS. The available options are MONO, DUAL MONO and STEREO. Changing
the channels selection will mute the analogue and digital outputs while the delay is
acquired with the new setting.
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
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
Mono – The left channels only are used for the mono signal and the right channels are
muted. This mode doubles the delay durations available, compared to stereo and dual
mono settings.

Dual Mono – This allows the delay on the left and right channels to be independently
set. All other configuration options are common to both the left and right channels.

Stereo – The selected delay applies to both the left and right channels.
S YN C HRO NISERS, D EL AYS & SILENCE DTEC TORS - RB -DS 2
The default channel configuration is stereo.
44
Sample Rate
This option selects the sample rate used when the input source is set to Analogue. From the
main system menu select SAMPLE RATE. The available options are 32KHZ, 44.1KHZ, 48KHZ,
64KHZ, 88.2KHZ and 96KHZ. Changing the sample rate will mute the analogue and digital
outputs while the delay is acquired with the new setting. The default sample rate is 48kHz.
Sample Width
This option selects the sample size used in the analogue to digital and digital to analogue
conversion. From the main system menu select SAMPLE WIDTH. The available options are
16BIT and 24BIT. Changing the sample width will mute the analogue and digital outputs
while the delay is acquired with the new setting. The default sample width is 24bits.
Format
This option is used to set the number of frames per second that apply when setting the
delay in units of either Fields or Frames. From the main system menu select FORMAT.
The available options are 25 FRAMES PER SEC, 24 FRAMES PER SEC, 30 FRAMES PER SEC
and 30 DROP FRAME.

25, 24 and 30 Frames Per Second – Selects the required frame rate. When using Fields
as the selected delay units, there are 2 Fields to 1 Frame, so the Fields per second
equivalents of these settings are 50, 48 and 60 respectively.

30 Drop Frame – This refers to an actual frame rate of 29.97 frames per second.
The default format is 25 frames per second.
Delay Units
This option selects the units for the delay. From the main system menu select DELAY
UNITS. The available options are SAMPLES, FIELDS, FRAMES, TIME and METRES.

Samples – This refers to the number of 16bit or 24bit samples.

Fields – This uses the Format option to determine the actual number of Fields/second.

Frames – This uses the Format option to determine the number of Frames/second.

Time – In Normal mode, the time units are milliseconds. In Extended Using CF mode,
the time units are hours, minutes and seconds.

Metres – This allows for the delay of sound travelling the selected number of metres
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(calculated as the speed of sound at 20 degrees C, 343.371 m/sec). The delay is set in
units of 10 metres and is only available in Normal mode.
The default delay units are samples.
Volume
This selection shows the Volume sub-menu. The sub-menu items are INPUT PK DIGITS,
OUTPUT GAIN, ANALOGUE MUTE and DIGITAL MUTE.
Output Gain
This option sets the gain of the analogue output stage. From the volume sub-menu select
OUTPUT GAIN. The available gain settings are from –6 dB to +24 dB in 1 dB increments. The
default value for output gain is +12dB
Analogue Mute
This option mutes the analogue audio output. From the volume sub-menu select
ANALOGUE MUTE. The available options are OFF and ON. By default, the analogue mute
is off.
Digital Mute
This option mutes the digital audio output. From the volume sub-menu select DIGITAL
MUTE. The available options are OFF and ON. By default, the digital mute is off.
Setups
This selection shows the Setups sub-menu. The sub-menu items are VIEW, LOAD, SAVE
and REMOTE LOADING. Setups provide an easy way of saving and recalling configurations
settings. There are 8 available setups and each one includes the following parameters:
Mode (normal or extended),
Source (analogue, analogue sync or digital),
Channels (mono, dual mono or stereo),
Sample rate (32kHz, 44.1kHz, 48kHz, 64 kHz, 88.2kHz or 96kHz),
Sample width (16bit or 24bit),
Format (24fps, 25fps, 30fps or 30 drop frame),
Delay units (samples, fields, frames, time or metres),
Delay,
Input peak digits (+12dB, +18dB or +24dB),
Output gain (-6dB to +24dB),
Analogue mute,
Digital mute,
Bypass.
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Input Peak Digits
This option sets the full-scale dB input amplitude that will give full-scale digits in the
digital domain. From the volume sub-menu select INPUT PK DIGITS. The available options
are +12 dB, +18 dB and +24 dB. The default value for input peak digits is +12dB.
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View
This selection lists the configuration settings of the selected setup. From the setups submenu select VIEW followed by the required setup number. The details of the selected
setup are shown as a list.
S YNC HRONISERS, D EL AYS & SILENCE DTEC TORS - RB -DS 2
Load
This selection loads the selected setup. From the setups sub-menu select LOAD followed
by the required setup number. The analogue and digital audio outputs will be muted
whilst the new configuration is loaded.
46
Save
This selection allows the current configuration settings to be saved. From the setups submenu select SAVE followed by the required setup number. All of the current settings will
be saved to the selected setup, which can then be loaded at a later time.
Remote Loading
When remote loading is enabled, each setup can be loaded automatically by connecting
the ground pin (pin 9) to pins 1 to 8 on the 15-way D-Type remote socket on the rear
panel. Connecting pin 1 to ground selects setup 1, pin 2 selects setup 2, etc. From the
setups sub-menu select REMOTE LOADING. The available options are DISABLED and
ENABLED. By default, remote loading is disabled.
Memory Card
This selection shows the Memory Card sub-menu. The sub-menu items are DETAILS and
FORMAT CARD. An internally mounted Compact Flash™ memory card slot accepts memory
cards up to 2Gbytes. A memory card is only used in Extended Mode.
Details
This selection shows details of the installed memory. From the memory card sub-menu
select DETAILS. The information shown is the model number, the capacity and the amount
of space available for use by the delay process.
Format Card
This selection formats the memory card using the DOS format with a 16-bit FAT. From the
memory card sub-menu select FORMAT. When Format Card is selected, the system menu is
exited and the main screen is shown. A message box is then displayed indicating that the
memory card is being formatted.
Please note: Formatting will delete all files on the memory card.
Control Lock
This option allows the front panel bypass and rotary controls to be disabled. From the
main system menu select CONTROL LOCK. The available options are OFF and ON. Access
to the system menu is still enabled when the control lock is on to allow the lock to be
removed. When the control lock is enabled, a small key icon is displayed in the upper right
side of the main screen display. By default, the control lock is off.
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System
This selection shows the System sub-menu. The sub-menu items are BAUD RATE, SET TIME,
SET DATE and INFORMATION.
Baud Rate
This selection allows the baud rate of the serial port to be set. From the system sub-menu
select BAUD RATE. The available options are 9600, 19200, 38400, 57600 and 115200. The
default baud rate is 19200.
Set Date
This selection allows the date stored in the system real time clock to be set. From the system
sub-menu select SET DATE. The current date, if set, will be displayed. To set the date, turn the
rotary control to move the selection highlight between day, month and year. Once over the
required selection, press the rotary control to enable editing, which is performed by turning
the rotary control. Pressing the rotary control again allows the selection highlight to be
moved. Selecting OK saves the date, whilst CANCEL discards any changes made.
Information
This selection shows product and software version information. From the system sub-menu
select INFORMATION.
The Product Id is set to RB-DS2. This is used to identify the unit when using a PC and
the Redbox control software.
The Serial Number is factory set. Always quote this number in any correspondence
with Sonifex technical support.
The Bootstrap Version Number is the revision of the software that boots the system
and controls the firmware upgrade process. This software is installed at the factory
and can only be upgraded by Sonifex.
The Version Number is the revision of the main software. This software can be
upgraded. For the latest software updates, check the Sonifex website at
www.sonifex.co.uk
The Display Version Number is the revision of the software that is running on the
display PCB.
Redbox User Handbook No 1
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -D S 2
Set Time
This selection allows the time stored in the system real time clock to be set. From the system
sub-menu select SET TIME. The current time, if set, will be displayed. To set the time, turn the
rotary control to move the selection highlight between hours, minutes and seconds. Once
over the required selection, press the rotary control to enable editing, which is performed
by turning the rotary control. Pressing the rotary control again allows the selection highlight
to be moved. Selecting OK saves the time, whilst CANCEL discards any changes made.
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Serial Port Control
The Serial Port allows the RB-DS2 to be controlled and updated from a PC via a pin-topin serial cable, using the Sonifex Serial Control Interface (SCI) software. This software is
available as a free download from the Sonifex website at www.sonifex.co.uk/sci.
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -DS 2
Default Settings for the Serial Port
48
Baud Rate:
19200
Data Bits:
8
Stop Bits:
1
Parity:
Even
Handshaking:
None
Serial Interface Commands and Responses
Most of the commands follow the same structure: a 3 letter command followed by a colon,
followed by a parameter (if any) and terminated by Carriage Return with optional Line Feed.
A Line Feed character may be sent but it will be ignored by the RB-DS2. Commands are not
case sensitive.
Responses will be CR & LF terminated.
After the delay synchroniser has been powered-up, an initialisation string is sent
“Initialising DS2”.
Following are the commands and the expected responses:
Command
Description
Response
Bnn:
**Set baud rate where
nn = 11 (115200 baud)
nn = 57 (57600 baud)
nn = 38 (38400 baud)
nn = 19 (19200 baud)
nn = 96 (9600 baud)
BPD:
Bypass disable
ACK: or NAK:
BPE:
Bypass enable
ACK: or NAK:
BSV:
**Bootstrap version request where
n.n = bootstrap version
ACK: or NAK: (at old rate)
BSV:Vn.n
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
Command
DLY:c,n
Description
6
Response
Set delay where
ACK: or NAK:
c = 0 (left/stereo channel)
c = 1 (right channel)
n = delay
**Download firmware
new firmware installed when
‘S-Record’ terminator received
FMC:
Format memory card
ACK: or NAK:
LCS:n
Load configuration setup where
n = setup number (1-8)
ACK: or NAK:
LOC:
Enable control lock
ACK: or NAK:
MCD:
Request memory card details where
x = model number
y = capacity
z = size for delay
SAM:n
Set analogue mute where
n = 0 (off )
n = 1 (on)
ACK: or NAK:
SCH:n
Set channels where
n = 0 (mono)
n = 1 (dual mono)
n = 2 (stereo)
ACK: or NAK:
SDM:n
Set digital mute where
n = 0 (off )
n = 1 (on)
ACK: or NAK:
SDU:n
Set delay units where
n = 0 (samples)
n = 1 (fields)
n = 2 (frames)
n = 3 (time)
ACK: or NAK:
SER:
**Serial number request where
nnnnnn = serial number
SER:nnnnnn
Redbox User Handbook No 1
ACK: or NAK:
(ACK: indicates download can start)
MCD:x,y,z or NAK:
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -D S 2
DWN:
49
S YNC HRONISERS, D EL AYS & SILENCE DTEC TORS - RB -DS 2
6
50
H E A D P H O NE DISTRIBUTION
AMPLIFIERS
Command
Description
Response
SFM:n
Set format where
n = 0 (25 frames per second)
n = 1 (24 frames per second)
n = 2 (30 frames per second)
n = 3 (30 drop frame)
ACK: or NAK:
SIP:n
Set input peak digits where
n = 0 (+12dB)
n = 1 (+18dB)
n = 2 (+24dB)
ACK: or NAK:
SMD:n
Set mode where
n = 0 (normal mode)
n = 1 (extended mode)
ACK: or NAK:
SOG:n
Set output gain where
n = 0 (-6dB)
n = 1 (-5dB)
n = 2 (-4dB)
n = 3 (-3dB)
n = 4 (-2dB)
n = 5 (-1dB)
n = 6 (-0dB)
n = 7 (+1dB)
n = 8 (+2dB)
n = 9 (+3dB)
n = 10 (+4dB)
n = 11 (+5dB)
n = 12 (+6dB)
n = 13 (+7dB)
n = 14 (+8dB)
n = 15 (+9dB)
n = 16 (+10dB)
n = 17 (+11dB)
n = 18 (+12dB)
n = 19 (+13dB)
n = 20 (+14dB)
n = 21 (+15dB)
n = 22 (+16dB)
n = 23 (+17dB)
n = 24 (+18dB)
n = 25 (+19dB)
n = 26 (+20dB)
ACK: or NAK:
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
Command
Description
6
Response
n = 27 (+21dB)
n = 28 (+22dB)
n = 29 (+23dB)
n = 30 (+24dB)
Set remote setup loading where
n = 0 (off )
n = 1 (on)
SRQ:
Status request where STA:i_j_k_l_m_n_o_p_q_r_s_t_u_v_w_x_y_z
i = bypass status
J = left/stereo delay
k = right delay
l = control lock status
m = analogue mute status
n = channel setting
o = digital mute status
p = delay units setting
q = format setting
r = input volume setting
s = mode setting
t = output volume setting
u = remote loading setting
v = source setting
w = system date ddmmyy
x = sample rate setting
y = system time hhmmss
z = sample width setting
SSC:n
Set source where
n = 0 (analogue)
n = 1 (analogue sync)
n = 2 (digital)
ACK: or NAK:
SSD:ddmmyy
Set system date where
dd = day (1-31)
mm = month (1-12)
yy = year (00-99)
ACK: or NAK:
Redbox User Handbook No 1
ACK: or NAK:
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -D S 2
SRL:n
51
S YNC HRONISERS, D EL AYS & SILENCE DTEC TORS - RB -DS 2
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S YN C H RO N ISERS, DEL AYS &
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Command
Description
Response
SSR:n
Set sample rate where
n = 0 (32kHz)
n = 1 (44.1kHz)
n = 2 (48kHz)
n = 3 (64kHz)
n = 4 (88.2kHz)
n = 5 (96kHz)
ACK: or NAK:
SST:hhmmss
Set system time where
hh = hours (0-23)
mm = minutes (0-59)
ss = seconds (0-59)
ACK: or NAK:
SSW:n
Set sample width where
n = 0 (16bit)
n = 1 (24bit)
UID:
**Unit ID request
UNL:
Disable control lock
VER:
Version request where
y.yyy = firmware version
zzzz = display version
ACK: or NAK:
UID:DS2
ACK: or NAK:
VER:Vy.yyy,Vzzzz
** Supported in Bootstrap mode
Upgrading Firmware
Occasionally, it may be necessary to upgrade the firmware on the delay synchroniser to add
new functionality and fix software bugs. New firmware updates will be made available from
time to time on the Sonifex website. Visit www.sonifex.co.uk for details.
The firmware is upgraded using the Serial Control Interface - SCI. This PC software
downloads the new firmware and initiates the upgrade process. To upgrade the firmware,
select the required firmware file in the SCI upgrade firmware section. The delay synchroniser
will automatically reboot and enter the bootstrap mode prior to the transfer of the firmware
file. The SCI software downloads the firmware to internal memory, and then erases the
current firmware before programming the update. When the firmware is complete, the unit
reboots with the new firmware.
Please note: Firmware files can take several minutes to transfer to the delay synchroniser at
lower baud rates. To speed up the process, select a higher baud rate prior to transferring the
new firmware.
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
6
Technical Specification RB-DS2
Audio Specification
+27dBu
Input Impedance:
> 10kΩ bridging
Input Levels:
+24dBu / +18dBu / +12dBu for FSD
Gain Range:
Adjustable 3dB loss to 3dB gain (L & R adjust)
Signal to Noise:
Better than –101dBFS (RMS A-weighted at 24bit)
Dynamic Range:
> 110dB
Distortion & Noise:
> 96dB THD + N at 1kHz
Maximum Output Level:
+24dBu
Output Impedance:
< 50Ω
Dynamic Range:
> 100dB
Gain Range:
–6dBu to +24dBu output level, ref FSD
Sampling Frequency:
32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz or 96kHz
Sample Width:
16bit or 24bit
Channels:
Stereo, Dual Mono or Mono
Format (Fields & Frames):
25, 24 or 30 frames per second or 30 drop frame
Delay Units:
Samples, Fields, Frames or Time (msecs or hh:mm:ss
in ext. mode) & Metres (normal mode only)
Minimum Delays
30 samples at 32kHz, 44.1kHz and 48kHz
20 samples at 64kHz, 88.2kHz, 96kHz
Maximum Delays:
See Figures 6-7, 6-8 and 6-9.
Analogue/Digital Connections
Analogue Inputs:
2 x XLR 3 pin female (balanced) (L & R)
Analogue Outputs:
2 x XLR 3 pin male (balanced) (L & R)
Digital Inputs:
1 x AES/EBU XLR 3 pin female
Digital Outputs:
1 x AES/EBU XLR 3 pin male
Redbox User Handbook No 1
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -D S 2
Maximum Input Level:
53
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S YN C H RO N ISERS, DEL AYS &
S I L E N C E D E TEC TORS
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -DS 2
Additional Connections
54
Mains Input:
IEC Power Plug, 100-240 VAC, 47-63Hz, fused 60W peak,
30W average
Serial Communications Port:
9-way D-type socket
Remote Input/Output Port:
15-way D-type socket
Memory Expansion:
Internal Compact Flash™ Storage Card Slot
Operational Controls
Display:
Vacuum Fluorescent Display
System Navigation:
Rotary selector with integral push-switch
Audio Bypass:
Via push-switch
Physical Specifications
Dimensions (Raw)
48cm (W) x 15.8cm (D *) x 4.2cm (H) (1U)
Dimensions (Boxed)
53cm (W) x 25.5cm (D *) x 6cm (H)
Weight Nett:
1.6kg Gross: 2.2kg
* Note that this product is deeper than standard Redboxes.
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
44.1 kHz
16 bit
24 bit
2058240 1029120
2333
1166
2240
1120
2800
1400
2797
1398
1166
583
1120
560
1400
700
1398
699
46672
23336
16020
8010
48 kHz
16 bit
24 bit
2058240 1029120
2144
1072
2058
1029
2572
1286
2570
1285
1072
536
1029
514
1286
643
1285
642
42880
21440
14720
7360
Samples
Fields
25fps
24fps
30fps
30df
Frames
25fps
24fps
30fps
30df
Time (ms)
Metres
64 kHz
16 bit
24 bit
2058240 1029120
1608
804
1543
771
1929
964
1927
963
804
402
771
385
964
482
963
481
32160
16080
11040
5520
88.2 kHz
16 bit
24 bit
2058240 1029120
1166
583
1120
560
1400
700
1398
699
583
291
560
280
700
350
699
349
23336
11668
8010
4000
96 kHz
16 bit
24 bit
2058240 1029120
1072
536
1029
514
1286
643
1285
642
536
268
514
257
643
321
642
321
21440
10720
7360
3680
Fig 6-7: Maximum Delays in Normal Mode (Using On-Board Memory Only)
Note: 1. The delays shown are for a stereo, or dual mono, signal.
2. The delay times shown can be doubled for a mono signal.
Redbox User Handbook No 1
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -D S 2
Samples
Fields
25fps
24fps
30fps
30df
Frames
25fps
24fps
30fps
30df
Time (ms)
Metres
32 kHz
16 bit
24 bit
2058240 1029120
3216
1608
3087
1543
3859
1929
3855
1927
1608
804
1543
771
1929
964
1927
963
64320
32160
22080
11040
6
55
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -DS 2
6
56
S YN C H RO N ISERS, DEL AYS &
S I L E N C E D E TEC TORS
Samples
Fields
25fps
24fps
30fps
30df
Frames
25fps
24fps
30fps
30df
Time (hh:mm:ss)
32 kHz
44.1 kHz
48 kHz
16 bit
24 bit
16 bit
24 bit
16 bit
24 bit
32878592 16439296 32878592 16439296 32878592 16439296
51372
25686
37277
18638
34248
17124
49317
24658
35786
17893
32878
16439
61647
30823
44732
22366
41098
20549
61585
30792
44688
22344
41057
20528
25686
12843
18638
9319
17124
8562
24658
12329
17893
8946
16439
8219
30823
15411
22366
11183
20549
10274
30792
15396
22344
11172
20528
10264
00:17:07 00:08:33 00:12:25 00:06:12 00:11:24 00:05:42
Samples
Fields
25fps
24fps
30fps
30df
Frames
25fps
24fps
30fps
30df
Time (hh:mm:ss)
64 kHz
88.2 kHz
96 kHz
16 bit
24 bit
16 bit
24 bit
16 bit
24 bit
32878592 16439296 32878592 16439296 32878592 16439296
25686
12843
18638
9319
17124
8562
24658
12329
17893
8946
16439
8219
30823
15411
22366
11183
20549
10274
30792
15396
22344
11172
20528
10264
12843
6421
9319
4659
8562
4281
12329
6164
8946
4473
8219
4109
15411
7705
11183
5591
10274
5137
15396
7698
11172
5586
10264
5132
00:08:33 00:04:16 00:06:12 00:03:06 00:05:42 00:02:51
Fig 6-8: Maximum Delays in Extended Mode with 128 MB Compact Flash™ Memory Card Installed
Note:
1. A maximum of 2GB can be installed, doubling the above delay times.
2. In Extended Mode, the Metres selection is disabled.
3. The delays shown are for a stereo signal; in Extended Mode dual mono operation is not
available.
4. The delay times shown can be doubled for a mono signal.
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
64 kHz
88.2 kHz
96 kHz
16 bit
24 bit
16 bit
24 bit
16 bit
24 bit
Samples
261468160 130734080 261468160 130734080 261468160 130734080
Fields
25fps
204272
102136
148224
74112
136181
68090
24fps
196101
98050
142295
71147
130734
65367
30fps
245126
122563
177869
88932
163417
81708
30df
244881
122440
177691
88845
163254
81627
Frames
102136
51068
74112
37056
68090
34045
25fps
98050
49025
71147
35573
65367
32683
24fps
122563
61281
88934
44467
81708
40854
30df
122440
61220
88845
44422
81627
40813
Time (hh:mm:ss)
01:08:05 00:34:02 00:49:24 00:24:42 00:45:23 00:22:41
Fig 6-9: Maximum Delays in Extended Mode with 1 GB Compact Flash™ Memory Card Installed.
Note:
1. A maximum of 2GB can be installed, doubling the above delay times.
2. In Extended Mode, the Metres selection is disabled.
3. The delays shown are for a stereo signal; in Extended Mode dual mono operation is not
available.
4. The delay times shown can be doubled for a mono signal.
Redbox User Handbook No 1
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -D S 2
32 kHz
44.1 kHz
48 kHz
16 bit
24 bit
16 bit
24 bit
16 bit
24 bit
Samples
261468160 130734080 261468160 130734080 261468160 130734080
Fields
25fps
408544
204272
296449
148224
272362
136181
24fps
392202
196101
284591
142295
261468
130734
30fps
490252
245126
355738
177869
326835
163417
30df
489762
244881
355383
177691
326508
163254
Frames 25fps
204272
102136
148224
74112
136181
68090
24fps
196101
98050
142295
71147
130734
65367
30fps
245126
122563
177869
88934
163417
81708
30df
244881
122440
177691
88845
163254
81627
Time (hh:mm:ss)
02:16:10 01:08:05 01:38:48 00:49:24 01:30:47 00:45:23
6
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7
RB-SD1 Silence Detection Unit
Introduction
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -S D1
Fig 7-1: RB-SD1 Front Panel
58
The RB-SD1 Silence Detect Unit is a 1U rack mount device used to monitor an unattended
stereo studio feed and in the event of the signal going “quiet” after a given period the
unit will switch through an alternative stereo audio signal. This signal could be a recorded
message (e.g. “normal service will be resumed”, etc), a feed from a CD player or minidisk
machine, or an alternative recorded program. Controls are provided to start external
equipment and to provide remote status indication.
It has 2 balanced stereo audio inputs with the maximum input level being +28dBu. Each
input is user-defined as either the main source or auxiliary source and both sources
are monitored for failure, each having a remote failure alarm. In the event of the main
source dropping below a pre-set level for a pre-determined amount of time, the unit will
automatically switch through to the auxiliary signal. The silence detect level is adjustable
between -60dBu and -15dBu in 3dB steps via a 16 position rotary switch on the rear panel.
The silence interval can be adjusted between 2 seconds to 30 seconds in 2 second steps,
or, alternatively, set to 2 minutes 5 seconds also via a 16 position rotary switch on the rear
panel. The audio outputs use stereo professional balanced XLR-3 male connectors.
The unit can operate in 2 modes - automatic or manual. In both modes it will automatically
switch over to the auxiliary source on detecting silence. When the main signal is again
detected it will either return to the main signal automatically or manually depending on the
mode chosen.
The RB-SD1 has a number of remote operational features. Remote outputs provide separate
relay contact closures for failure of the main and auxiliary inputs. You can also control
remotely all of the front panel switches for source selection, mode selection and signal
Restore. You can remotely start and stop another piece of equipment on alarm failure
and main signal return respectively. Also, the longest silence time (2min 5sec) can be set
remotely, which is useful if you are expecting to broadcast a long silence.
The unit can be configured to alarm when either the left or right channel of the main input
source fails, or if the whole stereo signal fails. There are also options to set the remote start
output as momentary or latched, to disable switching to the auxiliary input on alarming
and to increase the gain on the auxiliary input so that an unbalanced input can be used, for
example, from a domestic minidisc player.
Front panel LED indicators show individually left and right programme and alarm conditions
for both the main and auxiliary inputs. The status of the source, mode and alarm state are
also shown on the front panel with LED indicators.
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
7
Additionally, the RB-SD1 can be programmed for specific applications, which can be
defined on power-up of the unit, e.g. for extended silence detect times. See page 64 for
current additional power-up modes, or contact Sonifex for further information if you have a
particular requirement.
The RB-SD1 has been designed to have a passive signal path through the main input, so
if power to the unit fails, the signal input will still be routed through to the output. This is
essential for applications such as installation at transmitter sites, where a power failure to
the unit should not prevent the audio input signal from being output to the transmitter.
System Block Diagram
Professional
Balanced
Left
Right
Reference
Voltage Select
0...9,A...F
Summing
Amp
Monitored
Channel Select
Mode Select
0...9,A...F
Output Select
( Default/Power Off )
Select Input A
Stereo
Output
Digital Control
Pot
Summing
Amp
A/B
Switch
Control
Output
Select
Microprocessor
Comparator
Push
Switch
Mode
Stereo
Input B
Professional
Balanced
Time Select
Push
Switch
15 PIN
Restore Main Channel
Select
Left
Remote
Connector
Right
Fig 7-2: RB-SD1 System Block Diagram
Rear Panel Connections and Operation
A Inputs
B Inputs
Stereo
Outputs
Time
Remotes
Control Connector
Level Mode
Control Select
Fig 7-3: RB-SD1 Rear Panel
Redbox User Handbook No 1
Left
Professional
Balanced
Right
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -S D1
Stereo
Input A
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S YN C H RO N ISERS, DEL AYS &
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A/B Inputs (Left and Right)
There are four XLR-3 inputs, two for channel A (Left & Right) and another two for channel B
(Left & Right). The XLR 3 pin sockets are used for the input channels and are electronically
balanced. They have the following connections: Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -S D1
Outputs
60
The stereo input consists of two XLR male connectors professionally balanced with
following connections: Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
Silence Detect Trigger Level
The trigger level rotary switch (Level) adjusts the level below which silence detection occurs.
This level may be varied from –15dB to -60db in 3db steps by adjusting the switch, which is
accessible on the rear panel.
Switch
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Level dBu -60 -57 -54 -51 -48 -45 -42 -39 -36 -33 -30 -27 -24 -21 -18 -15
Silence Detect Interval Control
The silence detect interval rotary switch (Time) adjusts the duration over which a silence is
detected before alarming and ranges from 2-30 seconds (0 – E in 2 second intervals) with F
on the switch being a 2 min 5 second silence. This maximum time can also be activated or
de-activated remotely via the remote connector.
Switch
Seconds
0
2
1
4
2
6
3
8
4
10
5
12
6
14
7
16
8
18
9
20
A
22
B
24
C
26
D
28
E
F
30 125
Mode Dip Switch Settings
1. Stereo/Mono.
ON
1
2
3
OFF
2. Remote Start Mode Switch.
4
3. Professional levels/Consumer levels (Input B).
4. Switch/No switching when alarmed.
1. Stereo/Mono Switch – The configuration of this defines whether you want to switch
sources when left and/or right channel of the incoming source go silent.
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
Switch
Description
On
When on, the unit operates in stereo mode, whereby if one channel goes
quiet the unit will switch, and requires both channels to be present before it
switches back.
Off
When off, the unit operates in mono mode. In this mode the unit will only
switch when both channels go quiet, and requires only one channel to be
present before the unit switches back.
Switch
Description
On
When on, the remote start pin (pin 15) on the remote connector is pulled low
for half a second when the unit switches to the auxiliary input. (Momentary
contact).
Off
When off, the remote start pin on the remote connector is pulled low when
the unit switches over to the auxiliary input and remains low until the unit
switches back to the main source or, if in manual mode, is restored by the
user locally or remotely. (Latched contact).
3. Professional/Consumer Switch – This allows you to use an unbalanced piece of
equipment as the auxiliary input, by raising the input gain.
Switch
Description
On
When on, Input B accepts professional balanced signal level.
Off
When off, Input B accepts consumer unbalanced signal level and raises the
input gain received by 12dB.
4. Switch/No Switching in alarm state – This defines whether the unit switches to the
auxiliary input on silence detection.
Switch
On
Off
Description
When on, if the unit goes into the alarm state the unit switches to the
auxiliary input.
When off, if the unit goes into the alarm state the unit does not switch to the
auxiliary input.
Redbox User Handbook No 1
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -S D1
2. Remote Start Mode Switch – This defines whether the remote start switch is momentary
or latched. Used for starting external equipment when silence is detected.
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Remotes Connector
Displayed below are the pin connections and descriptions for the remote connector:
SYN C HRON ISERS, DEL AYS & SILENCE DTEC TORS - RB -S D1
Pin No. Signal
Pin 1
Master Alarm Normally Open
O
Relay 1 N/O to Pin 9
Pin 2
Master Alarm Normally Closed
O
Relay 1 N/C to Pin 9
Pin 3
Aux. Alarm Normally Open
O
Relay 2 N/O to Pin 11
Pin 4
Aux. Alarm Normally Closed
O
Relay 2 N/C to Pin 11
Pin 5
Mode Switch
I
Momentary make to Pin 8
Pin 6
Mode Indicator
O
Internal Open Collector to Digital Ground
Pin 7
Restore Switch
I
Momentary make to Pin 8
Pin 8
Digital Ground
-
-
Pin 9
Master Alarm Common
O
N/O to Pin 1, N/C to Pin 2
Pin 10
Max Time Whilst Latched
I
Latched make to Pin 8
Pin 11
Aux. Alarm Common
O
N/O to Pin 3, N/C to Pin 4
Pin 12
+5V
O
To power up to a maximum 100mA
Pin 13
Source Select Indicator
O
Internal Open Collector to Digital Ground
Pin 14
Source Select Switch
I
Momentary make to Pin 8
Pin 15
Remote Start
O
Internal Open Collector to Digital Ground
Pins 1 - 4 are for external use to replicate the alarm conditions for the Main and Auxiliary
inputs. The Aux alarm output can also be used as Remote Stop pin (See section 12.5.6).
Pins 5 - 7, 13 and 14 are to replicate the switches and indicators for the source select, mode
and restore functions.
Pins 8, 9, 11 and 12 are common or voltage pins.
Pin 10 is to select remotely the maximum silence time (2min 5sec). This may be useful
for the broadcast of Remembrance Day services, or where you expect a silence of up to 2
minutes to be broadcast. The maximum silence time is set whilst the contact is latched.
Pin 15 is used to remotely start an external piece of equipment and operates on audio fail.
Front Panel Selectors and Indicators
Fig 7-4: RB-SD1 Front Panel
62
I/O Description
Source
Alarm
Selector Indicator
Mode Selector
and Indicator
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SYNCHRONISERS, DEL AYS &
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Source Select and Indicator
The normal Main input source is selectable via a push switch accessed via a hole located on
the front panel, or it can be controlled remotely (pins 13 and 14). This allows you to define
whether input A, or input B is going to be your Main audio input. There is an LED to indicate
which state the source select is set:
LED
Description
LED On
Main source is input A, Aux source is input B
LED Off
Main source is input B, Aux source is input A
Mode Selector and Indicator
The Mode Switch defines how the unit should operate during an alarm condition, when
the main audio source returns. There is an option to allow the device to switch back
Automatically or Manually. The mode is selected by a push switch accessed through a hole
on the front panel with a corresponding LED to represent its state, or it can be controlled
remotely (pins 5 and 6).
LED
LED On
LED Off
LED Flashing
Description
Automatic Mode – During an alarm condition when the main source
returns, it is switched back automatically, although there must be a
continuous signal present for two seconds before it switches.
Manual Mode – When the alarm condition is reached, the LED begins
to flash.
Manual Mode – The main audio has returned after an alarm condition.
To switch to the main source, push the Restore button (or control it
remotely).
Main and Aux Indicators
On the front panel there are four Main indicators and four Aux indicators. Each left/right
channel has a Program Content and Alarm Status indicator. The Program Content Indicator
represents the input signal level for that channel and the Alarm Status LED indicates when
the channel has dropped below the threshold for longer than the time selected.
Both the Main and Aux inputs are continuously monitored so that you can check that your
backup signal is operating correctly, as well as your main input source.
Note: Although one channel of the stereo input may have alarmed, the main alarm may
not be set, due to the setting of the Stereo/Mono Dipswitch.
Redbox User Handbook No 1
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -S D1
Note : If the unit is powered off, for example during a black-out, input A routes through
to the output. Therefore if the unit is subject to a power fail while the main source is set
to input B, the unit will output source A.
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SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -S D1
Alarm Indicator
The Alarm indicator situated on the front panel is used to display the alarm status of the
Main input. Its operation is dependant on the selected mode. When in stereo mode the
unit alarms on a single main channel timeout, and in mono, alarms on both main channels
timing out. The unit exits the alarm state on the return of the main source signal, depending
on the setting of the Stereo/Mono Dipswitch. The alarm indicator is remotely indicated on
pins 1 and 2 of the remotes connector.
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Restore Button
The restore button is used for restoring the main source signal when the unit is operating
in Manual Mode. When the main source signal returns after it has timed out, the Mode
LED flashes, indicating that the source signal can be restored. When the Restore button is
pressed the main source returns. This can be remotely controlled using pin 7 of the remotes
connector.
Additional Modes
An option to set the unit in different modes of operation is available and is selectable when
the unit is powered on. There are currently four modes of operation, and are as follows:
Normal Mode, Remote Stop Mode, Remote Alarm Set Mode, Signal Detection Mode and
Timout Times 2 Mode: Normal Mode is as described previously for normal machine power-up.
Remote Stop Mode operates as follows. When the main source returns from an alarmed
state, pin 4 on the remote connector (Aux Alarm NC) closes to Pin 11 (Aux Alarm Common)
for half a second. (Note: this will only occur when the Remote Start Mode Switch is set on
(page 10-4) and whilst in Remote Stop Mode, the Aux alarm is not available to indicate the
presence of audio on the auxiliary input).
Remote Alarm Set Mode operates as follows. When the RESTORE pin on the remote
connector (pin 7) closes to the DIGITAL GROUND pin on the remote connector (pin 8) the
unit will immediately enter an alarmed state and switch to the auxiliary input. This alarm
state is continued until the RESTORE pin opens to the DIGITAL GROUND pin. After this the
unit will switch back to the main input when audio is present.
NOTE: When operating in manual mode, restoration of output from the main input is
only available via the front panel restore switch. All other functions operate as normal.
Signal Detection Mode In this mode the three controls, source, remote source, mode,
remote mode, restore and remote restore have no effect.
The count in time for the signal detection is zero, i.e. as soon as signal is detected on an
input the relevant relay will switch. The relays operate the same as in normal mode, i.e. when
audio is detected on the main input, pin 1 on the remote connector closes to pin 9. When
audio is lost on the main input, pin 2 on the remote connector closes to pin 9. All other
functions operate as with normal mode.
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
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Timeout x 2 Mode. In this mode, the timeout selection is multiplied by two (see table
below), except for the max time selection (position F on the time rotary encoder). All other
functions operate as normal.
Switch
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
Seconds
4
8
12
16
20
24
28
32
36
40
44
48
52
56
60 125
F
To Set the Additional Modes
Apply power to the unit, and while the front panel ALARM LED is flashing, press and hold
the RESTORE button. The MAIN LEFT PROG, MAIN LEFT ALARM, MAIN RIGHT PROG and MAIN
RIGHT ALARM LED’s should now be flashing alternately. To select Normal Mode release the
RESTORE button while the MAIN LEFT PROG LED is on. To select the Remote Stop Mode
release the button while the MAIN LEFT ALARM LED is on. To select Remote Alarm Set Mode
release the button while the MAIN RIGHT PROG LED is on. To select Signal Detection Mode
release the button while the MAIN RIGHT ALARM LED is on. To select Timeout Times 2 Mode
release the button while the AUX LEFT PROG LED is on. To select Force Main Mode release
the button while the AUX LEFT ALARM LED is on.
After the button is released the unit will start working after five seconds. You only have to
do this once as the mode is stored in non-volatile memory and you will only need to repeat
this procedure if you wish to select a different mode. Each time the unit is powered on; the
selected mode is visible by checking which LED is:
MAIN LEFT PROG LED on
=
Normal Mode
MAIN LEFT ALARM LED on
=
Remote Stop Mode
MAIN RIGHT PROG LED on
=
Remote Alarm Set Mode
MAIN RIGHT ALARM LED on
=
Signal Detection Mode
AUX. LEFT PROG LED on
=
Timeout Times 2 Mode
AUX. LEFT ALARM LED on
=
Force Main Mode
Redbox User Handbook No 1
S YNCH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -S D1
Force Main Mode. In this mode only the remote mode control input has any effect. When
this control input is active (low) the output is forced to input B (the master input) regardless
of whether audio is present. The unit operates in auto mode and with input B as the master
input. All other functions operate as with normal mode.
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Technical Specifications RB-SD1
SYN CH RON ISER S, DEL AYS & SILENCE DTEC TORS - RB -S D1
Audio Specifications
66
Maximum Input Level:
+28dBu
Input Impedance:
> 100kΩ balanced
Maximum Output Level:
+28dBu
Output Impedance:
As input, except when using unbalanced auxiliary input
where output impedance < 50Ω
Frequency Response:
20Hz to 20kHz ±0.1dB
Gain:
+12dB (for unbalanced input B – optional)
Noise:
<-87dB, unity gain, ref +8dBu output for
unbalanced input.
Distortion:
As input for balanced input, <0.05% ref +8dBu output for
unbalanced input.
Connections
Inputs (Main & Auxiliary):
4 x XLR 3 pin female (balanced, auxiliary can
be unbalanced)
Output:
2 x XLR 3 pin male (balanced)
Remotes:
15 way D-type plug
Power:
Filtered IEC, 110-120V, or 220-240V switchable, fused,
6W maximum
Rear Panel Controls
Alarm Threshold:
-15dBu to -60dBu in 3dB steps via rotary switch
Silence Detect Duration:
2 sec to 30 sec in 2 second intervals and 125 second
option via rotary switch
Detection Type:
Mono or stereo, via dipswitch
Silence Switch Defeat:
Disable/enable silence switching, via dipswitch
Remote Start Mode:
Latched or momentary, via dipswitch
Redbox User Handbook No 1
SYNCHRONISERS, DEL AYS &
SILENCE DE TEC TORS
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Front Panel Controls and Indicators
Controls:
Source select, mode select and restore
Indicators:
Program and alarm indicators for left and right source
for both main and auxiliary channels
Source, mode and restore LEDs
Equipment Type
Silence detection unit
Physical Specifications
Dimensions (Raw):
48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
Dimensions (Boxed):
53cm (W) x 20.5cm (D) x 6cm (H)
Weight:
Nett:
Redbox User Handbook No 1
1.4kg
Gross: 2.0kg
S YN CH RONI SERS, DEL AYS & SILEN CE DTEC TOR S - R B -S D1
RB-SD1:
67
w w w. s o n i fe x . c o. u k
t:+44 (0)1933 650 700
f:+44 (0)1933 650 726
s a l e s @ s o n i fe x . co. u k
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