Ideal for the transfer of digital audio between different digital equipment, the RB-SC1 sample rate converter standardises the sample rate of a digital audio signal to one of 32kHz, 44.1kHz, 48kHz or 96kHz, or to a synchronising input.
Both audio inputs and outputs have push button switches to select either AES/EBU or S/PDIF. The synchronising input can be selected from one of AES/EBU, S/PDIF or TTL Wordclock.
There are four modes of operation of the RB-SC1 dependant on how you want to synchronise the output to the input :
Master Mode - In this mode 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.
Auto Sync Mode - In this mode 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.
Auto Lock Mode - In this mode 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.
Slave Mode - In this mode the digital output sample rate follows the sync input. When the sync signal is not present the digital output is turned off.
There are also switches 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 follow the input signal type, or can be forced to either Professional or Consumer Mode.
As well as indicating that power is present on the unit, the LED on the front panel has a secondary role to indicate the status of the digital inputs. Fast flashing between red and amber indicates a loss of a digital input signal and slow flashing between red and amber indicates the absence of a synchronising input when not in Master Mode.
Audio Specification Dynamic Range 120dB Distortion and Noise -114dB THD + N at 1kHz, ref 0dB FS Input Impedance 75ohms S/PDIF inputs 110ohms AES/EBU input 50ohms BNC TTL word clock input Sample Frequency Range 30kHz - 100kHz Bit Depth Up to and including 24 bit Rear Panel Connections and Controls Inputs 2 x AES/EBU XLR 3 pin female (audio and sync) 2 x S/PDIF RCA phono (audio and sync) 1 x TTL BNC female (sync) Outputs 1 x AES/EBU XLR 3 pin male 1 x S/PDIF RCA phono Mains Input Filtered IEC, continuously rated 85-264VAC @ 47-63Hz, max 10W Input Select Push button switch between AES/EBU and S/PDIF Output Select Push button switch between AES/EBU and S/PDIF Sync Select Push button switch between AES/EBU and S/PDIF, with DIP switch selection between TTL and the other two inputs Operational Modes Master mode, auto sync mode, auto lock mode and slave mode, set via rotary switch Status Bits DIP switch used to force between consumer mode, professional mode, or set to follow input Physical Specification Weight Nett: 1.0kg Gross: 1.4kg Dimensions Raw: 28cm (W) x 10.8cm (D) x 4.2cm (H) Boxed: 36cm (W) x 20.5cm (D) x 6cm (H)
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