Antex Electronics StudioCard AV Pro, StudioCard 2000, & SC-22 - Manual (Page 116)

S a m p l e C l o c k G e n e r a t o r C h a p t e r 6
Antex Electronics Corporation Antex StudioCard 6-7
Sample Clock
Generator
The StudioCard’s sample clock generator generates a word
clock, at the desired sample rate, and related clocks for the
A/D and D/A converters based on a selected clock reference.
The clock reference, which can have a frequency of 24 kHz to
54 MHz, is multiplied by an appropriate factor by a phase-
locked loop circuit to create the output clocks.
Clock reference sources include the on-board DSP clock, video
horizontal sync, a clock from an adjacent board received on the
internal clock input, an external clock received from the
external clock input on the digital I/O connector, and a word
clock from the digital audio input. The generator supports
clocks of word and non-word types received from the external
clock input. Word clocks are processed in a manner so that
phase synchronization with external devices is maintained.
The word clock output of the generator is available at the
internal clock output connector. This signal is typically used as
a clock reference input to an adjacent board, but can be routed
to the host computer’s rear panel for use by external devices.