Sonifex RB-DS2Stereo Delay Synchroniser and Time-Zone Delay
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.
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 or vice-versa. It is a stereo delay, but can also be used as a dual mono delay to process each audio path separately.
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 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.
Specifications A/D Audio Specification Maximum Input Level +27dBu Input Impedance >10kohms bridging Analogue and Digital Input Levels Selectable +12dBu, +18dBu or +24dBu for FSD Analogue Pre-set Input Gain Range Adjustable input gain of +/-3dB Signal to Noise Better than -101dBFS (RMS A-weighted at 24bit) Dynamic Range >110dB Distortion and Noise >96dB THD + N at 1kHz D/A Specification Maximum Output Level +24dBu Output Impedance <50ohms Dynamic Range >100dB Analogue Output Gain Range Selectable -6dBu to +24dBu ref FSD Sampling Frequency Selectable 32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz or 96kHz Sample Selectable 16bit or 24bit Channels Stereo or dual mono Format (Fields and Frames) PAL, NTSC Delay Units Samples, fields, frames, milliseconds, hh:mm:ss Maximum Delay 10.5 seconds @ 96kHz, 24bit, stereo (excluding memory expansion) Rear Panel Connections Analogue Inputs 2 x XLR 3 pin female (balanced) (L and R) Analogue Outputs 2 x XLR 3 pin male (balanced) (L and R) Digital Input 1 x AES/EBU XLR 3 pin female Digital Output 1 x AES/EBU 3 pin male Remote I/O Port 15-way D-type plug, 8 GPI inputs, 4 GPI outputs Serial RS232 9 way D-type plug Memory Expansion Internal CompactFlashTM storage card supporting upto 2GB Mains Input Filtered IEC, continuously rated 100-240VAC, 47-63Hz, fused, 60W peak, 30W average Front Panel Controls Display Vacuum florescent display System Navigation Rotary selector with integral push-switch Audio Bypass Via push-button Physical Specification Weight Nett: 1.7kg Gross: 2.3kg Dimensions Raw: 48cm (W) x 15.8cm (D) x 4.2cm (H) (1U) Boxed: 53cm (W) x 25.5cm (D) x 6cm (H)
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