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6-2
TECHNICAL DATA
Orban Model 464A
Specifications
Performance
Frequency response
(2O-20,0OOHz):
±0.25dB below
leveler,
compressor,
and
high-
frequency
limiter
thresholds.
RMS
noise
(20-20, 000Hz):
>85dB
(90dB
typical)
below
output
clipping
threshold
with
high-frequency
limiter
strapped
for
flat
output.
Interchannel crosstalk:
Better
than
-60dB
at
15kHz (-67dB
typical), falling at
6dB/octave below 15kHz.
Installation
Audio
Input
Impedance: >10K ohms,
active
balanced,
EMI-suppressed.
Operating
level:
Usable
with
-lOdBu
to
+8dBu
lines.
(OdBu = 0.775V
RMS;
for this
application,
the
dBm
@
600Q
scale
on
voltmeters
can be
read
as
if
were
calibrated
in
dBu.)
Connectors:
Barrier
strip
(#5
screws)
in
parallel
with
1/4" tip-ring-sleeve
(TRS)
phone
jacks
and XLR-type
jacks.
Audio Output
Impedance: 30
ohms
(93
ohms
for units
with
serial
numbers below
1306000),
electronically
balanced
and
floating to
simulate
true
transformer
output.
Minimum
load
impedance
is
600 ohms.
Output
can be unbalanced
by grounding
one
output
terminal.
Level: Front-panel
controls permit
use
with
-10dBm
to
+8dBm
systems. Output
clipping
level
is
>+20dBm
@
600n.
Connectors:
Barrier
strip
(#5
screws)
in
parallel
with 1/4"
TRS
phone
jacks
and
XLR-type
jacks.
Physical
Buttons: "Wink-eye"
type
—
end
of
buttons
turn
white
when
pressed
in.
Meters: Four
10
-segment
LED
bargraph
displays
show
gain reduction
and peak
output
level for
each
channel.
Indicators:
Four
LEDs
light
to
show
operation
of
gating or
high-frequency
limiting.
Dimensions:
19" (48.3
cm)
wide,
9
5
/g"
(24.5
cm)
deep,
1
3
/,j"
(4.5
cm)
high.
Operating temperature range: 32-1 13°F (0-45°C)
Power
requirements: 115/230
volts
AC
±10%, 50-60Hz,
16VA.
Three-wire
"U-Ground"
plug
(USA
standards)
or
CEE7/7
plug (Continental
Europe)
attached.
EMI-suppressed.
Fuse:
V
2
-amp
3AG
250V
Slow-Blow
for
115V
operation;
250mA
"T"-type
3AG
250V
Slow-Blow
for
230V
operation.
Options
Security
cover
(acrylic):
To
prevent unauthorized adjustment
of controls.
Order
SCI
CLEAR
for
a
clear cover,
SCI
BLUE
for
a
transparent blue
cover, or
SCI
WHITE
for
an
opaque
white
cover.
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