User Manual-Mac

INSTALLING THE PCI-424 HARDWARE
33
3. Use word clock to resolve the HD192 system
clock and the other AES/EBU device with each
other.
These three AES/EBU input scenarios are
summarized below.
Some example scenarios are demonstrated below.
Simple AES/EBU input transfer (no rate convert)
Figure 3-10: Slaving the HD192 to an AES/EBU device. For the
HD192’s clock source, choose ‘HD192: AES/EBU’.
AES/EBU input with rate conversion
Figure 3-11: Rate-converting AES/EBU input.
AES/EBU input with word clock
Figure 3-12: In this scenario, the HD192 and other AES/EBU device are
both resolved to one another via a third master word clock source.
Clocking scenarios for AES/EBU output
The HD192 AES/EBU output is equipped with an
independent sample rate converter. In addition, it
can be clocked from one of several possible
sources, including its own crystal and separate ‘AES
Wor d I np ut’ . T h e s e opt io n s, sh ow n b e lo w i n
Figure 3-13, are briefly summarized in the
following sections. For further details, see “HD192
interface options” on page 73.
Scenario 1 Scenario 2 Scenario 3
Description
Simple
transfer
Rate
convert
Use word
clock
HD192 system
clock setting
HD192: AES/
EBU
Any setting
except
HD192: AES/
EBU
HD192:
Word Clock
AES/EBU input
rate convert
unchecked
(off)
checked
(on)
unchecked
(off)
Required HD192
cable
connections
AES/EBU IN AES/EBU IN AES/EBU IN
and Word
Clock IN
Are the devices
continuously
resolved?
Yes No Yes
Is the signal
being sample
rate converted?
No Yes No
Example
application
Simple digital
transfer into
the HD192
from DAT
deck or digi-
tal mixer.
Transfer from
digital mixer
running at a
different
sample rate.
Both the
HD192 and
other AES/
EBU device
are slaved to
‘house” word
clock.
Master
Slave
AES/EBU OUT
AES/EBU IN
HD192 clock source:
HD192: AES/EBU
AES input Rate
Convention option
is unchecked.
AES input Rate
Conversion option
is checked.
Master
Slave
AES/EBU OUT
AES/EBU IN
HD192 clock source:
PCI-424: Internal
(Slave)
(Slave)
AES/EBU OUT/IN
AES/EBU IN/OUT
HD192 clock source:
HD192: Word Clock In
Word clock IN
System Word clock IN
AES input Rate
Convention option
is unchecked.
‘House’ word clock master