Input/Output Configurations; Analog Left/Right Inputs; Digital; Aes/Ebu - Orban 8218 Operating Manual

INTRODUCTION
Orban Model 8218
AES/EBU
digital
input,
Overshoot
Control Limiter in/out,
and
AES/EBU
input
range.
• Remote
(contact closure) interface
using
opto-isolation
has pins
to select
between
analog or digital
input,
turn
pre-emphasis
on
or
off,
and
to select
among
stereo,
mono
from
left,
or
mono
from
right
operational
modes. Also on
the
remote
connector
is
a
digital pilot
reference output clock for external subcarrier gener-
ators
like
RDS.
This
is
a
TTL
level signal
with
0
to
+5V
transition
occurring at
the pilot
zero
crossing.
•
Overshoot
Control Limiter limits
overshoot to less
than
0.5dB with
minimum
artifacts.
•
AES/EBU
error
alarm
function provides
an alarm that indicates
if
a faulty
AES/EBU
signal
is
being received
at
the
821 8's digital input.
Input/Output Configurations
The
8218
provides:
• Analog
left/right
inputs or
digital
AES/EBU
left/right input.
• Composite
baseband
outputs.
•
SCA
subcarrier inputs.
•
Pilot
Reference output.
•
AES/EBU
error
alarm
function.
Analog
Left/Right
Inputs
The
left
and
right
analog inputs are
on XLR-type female connectors
on
the rear panel.
Input
impedance
is
greater than
lOOkQ; balanced and symmetrical.
Inputs can
accommodate from
0
to
+15dBu
for
100%
modulation.
(OdBu =
0.775Vrms).
Level
control of
the
analog inputs
is
via the
screwdriver-adjustable Left
and Right Drive
controls,
located
on
the
8218's front panel.
The
Left/Right
meter on
the
8218 shows
input levels as a
10-segment
bar graph
(5 to
1
10%).
100%
is
the threshold of the built-in
Overshoot Control Limiter. Inputs
reading
below
100%
on
this
meter are unaffected.
Digital
AES/EBU
Left/Right Input
The
digital
input follows the professional
AES/EBU
standard.
The
left/right digital input
is
on one
XLR-type
female connector on the rear panel.
The
digital
input
can
accommodate
a
20dB
level
adjustment,
in
four
6dB
ranges.
Fine
level
control
of
the
AES/EBU
input
is
via the screwdriver-adjustable Digital
Drive control, located