Sony CXD2701Q Data Book page 36

SONY
CXD1244S
1}
Command
and Audio
output
Attenuate data
is
in
12
bit
and can be
set
in
1024
steps.
The
relationship
between
command
and
outpu!
is
shown
in
the chart below.
Attenuate data Audio
output
400
(H)
dB
3FF
(H)
3FE
(H)
001
(H)
-0.0085
dB
-0.017
dB
-60.206
dB
000
(H)
-»
The
attenuate value from 001
(H)
to
3FF
(H)
can be obtained through the following formula.
Input
data
ATT=20log
1024
dB
Example: Attenuate data
for
3FA
(H)
1018
ATT=20log
1024
dB=-0.051
dB
2)
Attenuator operation
Suppose
that
there are pieces
of
attenuator
data
ATT1
,
ATT2
and
ATT3
and
that
ATT1>ATT3> ATT2
and
that
the place
of
attenuator data
ATT1
is
transferred
first
and ATT2
transferred next.
If
ATT2
is
transferred before.
The
value
of
ATT2
is
reached
(during the state
of
A
in
Fig.l),the
attenuation
directly
approaches
the
value
of
ATT2.
If
ATT3
is
transferred
before the value
of
ATT2
is
reached
(during the state of
B
or
C
in
Fig.1),
the attenuation
is
carried
on from the value
at
the time (B or
C)
to
approach
the
value
of
ATT3.
Transition from
one piece
of attenuator
data
to
another
is
the
same
as
in
the
case
of softmuting.
Fig.
1
Transition
from
one
attenuator value
to
another
-32-