sensitive
timing,
Dolby
E
encoders
must
have
a
reference
phase
locked
to
the
video.
In
other
words,
the
SDI
video
timing
feeding
the
encoder
must
match
the
same
composite
reference
timing
that
is
connected
to
the
Dolby
E
encoder.
A
simple
black
burst
generator
that
does
not
share
the
same
SDI
video
timing
will
not
work
to
source
a
Dolby
E
encoder.
A
composite
video
reference
that
shares
the
same
timing
as
the
video
source
should
be
used.
Typically,
SDI
video
should
be
run
through
a
frame
synchronizer
that
is
utilizing
the
same
reference
as
the
DE
encoder.
The
Adtec
encoder
preserves
audio
and
video
timing
as
it
is
presented.
If
the
audio
timing
does
not
match
video
timing
at
the
inputs,
there
will
be
potential
line
placement
errors
and/or
CRC
errors
seen
on
a
decoder.
No
Detection
of
Dolby
E
/
Dolby
Digital,
Front
Panel
shows
“DE
---”,
“DP
---”,
“LP
---”:
The
encoder
will
automatically
detect
the
bit
depth
of
Dolby
E
(
16
/
20
bit
)
and
the
bitrate
of
Dolby
E
/
Dolby
Digital.
If
Dolby
E
is
selected
and
Dolby
Digital
is
presented,
the
encoder
will
change
automatically
and
vice
versa.
If
Dolby
Digital
is
selected
and
Dolby
E
is
presented,
the
encoder
will
change
the
configuration
automatically.
If
the
front
panel
shows
dashes
for
the
detected
bitrate
‘---’,
Dolby
is
not
being
detected.
This
is
most
commonly
due
to
a
mis-configured
SDI
Audio
Matrix
or
Dolby
not
being
present
on
the
specified
input
pair.
Look
at
the
SDI
signal
on
an
SDI
analyzer
to
verify
that
Dolby
is
present
on
the
pair
intended.
If
an
SDI
analyzer
is
not
available,
one
troubleshooting
tip
is
to
set
the
mode
to
ENCODE.
If
silence
or
regular
audio
is
heard
on
the
decoder,
a
compressed
bitstream
is
not
being
presented
on
the
corresponding
input.
The
SDI
matrix
can
be
changed
to
each
pair
without
restarting
the
encode
session.
Once
hash
is
heard,
then
a
compressed
bitstream
should
be
present.
Set
the
mode
back
to
Passthru
for
the
automatic
detection
mechanism
to
configure
the
Dolby
type
and
bitrate.
Note
:
When
an
audio
input
/
channel
is
configured
for
Pass
through
operation
Internal
tone
generation
does
not
function
for
the
pass
through
channels.
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