Antex Electronics StudioCard AV Pro, StudioCard 2000, & SC-22 - Manual (Page 57)

C h a p t e r 3 Mi x e r C o n t r o l s a n d I n d i c a t o r s
3-8 Antex StudioCard Copyright © 1997
Adapter Controls Description
1 Sample Clock
Source DSP-
Clock The physical source of the audio sample clock is derived from this selection.
When DSP is selected, the sample clock generator signal source is the internal
clock on the Digital Signal Processor card (StudioCard). See note at end of
table..
2 Sample Clock
Source Internal Internal selector. When selected, the sample clock generator signal source is
supplied through the CLOCK IN connector on the top of the StudioCard internal
to the computer. This is the correct setting for the PVR without the PFx board or
for slave StudioCards in multiple card installations. See note.
3 Sample Clock
Source External External selector. When selected, the sample clock generator signal source is
supplied from the External Clock In female BNC connector of the Digital I/O
cable. See note.
4 Sample Clock
Source HSync HSync selector. When selected, the sample clock generator signal source is
supplied from a composite video or composite sync signal source through the
VIDEO IN connector on the top of the StudioCard. This is the correct setting for
many video capture boards. NOTE: The signal source must be a stable one,
such as from a time base corrector or sync generator. The uncorrected output
from a VTR is not adequate. See note.
5 Sample Clock
Source Digital Digital selector. When selected, the sample clock generator signal source is the
word clock derived from the digital input (AES/EBU or S/PDIF). See note.
6 Sample Clock
Reference Auto Auto selector. When selected, the sample clock generator will automatically
determine the frequency of the selected clock source. This is the only valid
option for the DSP-Clk and Digital In. The DSP-clock is a fixed 20 MHz clock.
The Digital In is always a word clock. See note.
7 Sample Clock
Reference
27MHz 27MHz selector. When selected, the sample clock generator will assume that
the selected clock source has a frequency of 27 MHz. This is the correct setting
for the PVR when connected via the PVR sync cable, PN 210-0398 (PFx not
installed). Supports 13.5MHz and 54MHz clocks also. See note.
8 Sample Clock
Reference Word Word selector. When selected, the sample clock generator will treat the selected
clock source as a word clock with a frequency identical to the desired sampling
rate. The sampling point of the StudioCard’s A/D and D/A occurs on the rising
edge of the input word clock. This provides a means to maintain coherency with
other digital audio devices. Valid word clock frequencies are 32, 44.1 and 48
kHz. Slave devices in multiple card installation use an internal word reference.
See note.