Operating instructions

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Clocking
The internal digital clock of the 2192 was designed for extreme stability and jitter-free operation.
The internal clock conditioner removes jitter from external sources, so conversion quality is
unaffected by clock source.
Flexibility
Combined with its extensive digital I/O, flexible front-panel routing controls, and phase aligned
clock conditioner, the 2192 provides high-quality master clock source and clock distribution for
your entire studio.
Two separate word clock inputs as well as AES/EBU, S/PDIF, and ADAT S-MUX can be used as
external clock sources in addition to the internal clock. Four word clock outputs are provided so the
2192 can be used as a master clock source without cascading the clock through external devices,
which can degrade the clock signal. A prominent lamp indicates when the 2192 is successfully
synchronized to an external clock source.
A/D and D/A conversion is accomplished at any available 2192 sample rate, even if the 2192 is
synchronized (slaved) to an external clock source that is running at a multiple (subclock) or
submultiple (overclock) of the 2192 sample rate.
Subclocking/Overclocking
Subclocking occurs if the 2192 is synchronized to an external clock that is running at 2x or 4x the
2192 sample rate. Overclocking occurs if the 2192 is synchronized to an external clock that is
running at 1/2 or 1/4 of the 2192 sample rate.
The 2192 clock source can be set to internal, and the digital source device set to synchronize to
the 2192 (recommended), or the clock source can be set to an external source that is generated
either by the digital source device, or an external clock master. When an external clock master is
used, both the digital source device and the 2192 must be set to synchronize to the external clock
master.
Reclocking
When an external clock master is used that provides a multiple or submultiple of the digital source
sample rate (e.g. a 48kHz clock master with 96kHz audio), the 2192 can slave to the clock
master, and generate the required word clock output for the digital source device at the higher or
lower sample rate.
Because the 2192 performs clock conditioning and jitter removal on all external clock sources,
there is no degradation in sound quality caused by inferior clock sources. All BNC clock and digital
output signals are generated from the conditioned internal clock, so the 2192 can be used for
reclocking poor quality external source clocks.
Synchronizing to unrelated clock rates (e.g. 44.1kHz clock with 48kHz digital audio) and sample
rate conversion are not supported.
The 2192 does not perform sample rate conversion.