swissonic aD 96, Руководство пользователя

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clock source, one unit can be used to convert to x1 or
x2 mode and the output of that unit fed to the other.
Figures 8, 9, 10 and 11 show examples of clocking
configurations.
The AD96 will significantly reduce jitter present on it’s
Wordclock input before using that clock and will out-
put the «cleaned-up» version of the wordclock to the
respective output. See Figure 12 for the typical jitter
reduction characteristic.
The Adat lightpipe in itself is a good way of moving 8
channels of 24-bit, 44 or 48 kHz data from A to B. How
various pieces of gear interpret this data, that’s a dif-
ferent story. Original Adat MDMs only support 16 bit
of each channel, the same as older Adat soundcards.
The newer soundcards will input and output all 24bits.
Adat MDMs are available with 20-bit recording depth.
There are two sides of mapping 24/96 data to various
Adat equipment: mapping the sample rate and map-
ping the bit depth. To map the double sample rate, the
obvious solution of using two 48 kHz channels for
each 96kHz channel will work smoothly. This way, the
Figure 8: A single
AD96 is slaved to an
external 48 kHz clock
source (upper). The
AD96 can be used to
convert from a 96 kHz
source to the 48 kHz
needed by an Adat
MDM (lower).
Figure 9: Multiple units
are slaved to an exter-
nal clock source.
Figure 10: Multiple
units are synched
together, using the
first unit’s internal
clock as reference.
Figure 11: Daisy chain
configuration used
when locking to super-
clock.
Jitter reduction
ADAT and 24/96
Figure 12: Typical
jitter attenuation
characteristic
15
out in
AD96 Wordclock
Clocksource = WCL x1
out
in
AD96
Wordclock
Clocksource = WCL x2
WCL out = x1
Clocksource
48 kHz
Clocksource
96 kHz 48 kHz
Adat MDM
Clocksource
96kHz
out in
AD96 Wordclock
Clocksource = WCL x2
out in
AD96 Wordclock
Clocksource = WCL x2
out in
AD96 Wordclock
Clocksource = WCL x2
To other equipment
out in
AD96 Wordclock
Clocksource = int
WCL out = x2
out in
AD96 Wordclock
Clocksource = WCL x2
Clockmaster slave1
up to10 m
slave n (up to 8 units)
out in
AD96 Wordclock
Clocksource = WCL x2
To other equipment
Clocksource
superclock
out in
AD96 Wordclock
Clocksource = super
WCL out = super
out in
AD96 Wordclock
Clocksource = super
WCL out = super
out in
AD96 Wordclock
Clocksource = super
WCL out = super
To other equipment Up to 5m Up to 5m
out
Jitter
atten
uation (dB)
0
5
10
15
20
25
30
35
0.1 1 10 100
Jitterfrequency (Hz)
1K