Obviously one can use the old fashioned way if required, but unlikely to be any benefit and more likelihood for detrimental affect with modern DACs.Īlso whilst we are talking of DAC jitter, don’t forget ADC jitter. Modern methods and electronics makes that unnecessary (unless for multiple device synchronisation) and allows the benefits of locally providing clocks reducing the clock signal path in audio DACs. In days gone by highly stable clocks were bulky affairs and were often separate. Where I come from using an external clock unless synchronisation with multiple devices is required in a recording studio for example will add challenges to clock signal integrity. This is why most manufacturers like Naim, Chord etc of DACs pay very close attention to the clock and signal integrity of the clock. Whatever the project, custom modules can be integrated with the DC-314.Ĭlick on the items below for further information.That article is addressing what DAC clock jitter does to reconstruction. The design of the system lends itself to simple customisation: analogue distribution, line ident, two channel mixer.
MASTER WORD CLOCK GENERATOR GENERATOR
A card with an integrated web browser will be available in the future for this purpose.Īll audio cards will plug and play while the system is active with no audio side effects - unless you remove a clock generator that a digital output is relying on of course! The control bus passes information that allows remote analysis and control. This gives the DC-314 the ability to control and integrate all connected modules. The system has an I2C control bus integrated into the backplane. There is no limit to this, and the high speed data required for digital clocks is maintained throughout. In this way, multiple frequencies can be utilised within the same system. When the backplane finds another Clock Generator card, it can set a new clock frequency to all further cards to the right without effecting the cards to the left. All subsequent cards to the right will operate at this frequency. This may be the clock from an AES input, or a new clock from the Clock Generator card. The clock from this card is passed to the card to its right. The backplane of the system first uses the leftmost card. After data and audio is received and used, if necessary, it is passed to the next card on the right. The card connections have an 'in' and an 'out' connector. The development of the DC-314 digital converter started with the backplane. With the flexible option of 3 different base units, 6 card options, front or rear cabling, and redundant power supply, the DC-314 system from Glensound is a powerful digital conversion solution. Multiple conversions can therefore be simply managed without the need for additional hardware. Glensound have also developed a system of a common backplane that makes the 3u version very flexible, allowing multiple clock frequencies within the same frame. What the DC-314 system offers are these functions, in the most effective combination that you need now, whilst allowing simple upgrading as situations change in the future. The DC-314 CLK GEN remembers its operational mode even after power resets.ĭigital conversion, clock generation, and distribution of digital signals are all standard requirements within a broadcast facility or outside broadcast vehicle. If this reference is lost, then the output frequency will continue at the closest frequency to the input before it was lost. Will follow external reference if detected. If no reference is available then the output frequency is set by the user. The output frequency will follow the reference input. The digital output frequency is set by the user and no lock will occur to any clock reference even if it is available. The CLK GEN can act as master clock to external devices via a front panel BNC output.ĭARS (digital audio reference signal) Input On XLR (also locks onto AES3)Ī front panel push button scrolls through the following clock frequencies: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz The CLK GEN can sync to external references via a front panel word clock input.
Two devices are used for exceptional jitter specifications at 48kHz and another device for 44.1 kHz. The high speed data bus provides very low jitter. This master clock is available externally via a front panel BNC output. The CLK GEN module provides clock reference signal to other modules in slots to the right.
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