USL, Inc.
JSD-80 Instruction Manual
Page 7
3rd Edition. February, 2006
Voltage adjustment: None
f. Digital Input:
Eight channels AES-EBU @ 32-96 kHz,
24-bit sample rate.
Line Outputs:
Voltage: 24 mV to 750 mV (nominal:
300 mV)
Impedance: < 500 Ohms
Gain Adjustment: -22 to +8 dB
Hearing Impaired Outputs: 500 Ohms im-
pedance
Nominal level: 300 mV rms: sum of L,C & R
with left and right channels lowered 3 dB.
Audio Signal Paths
Headroom: 26 dB (with EQ fl at), 20 dB typi-
cal with 6 dB EQ boost)
S/N Ratio: 80 dB A weighted 22-22 kHz
EQ (subwoofer): one parametric adjustable
from 20 to 100 Hz
EQ bands (all other): 27 1/3 octave bands
from 40 Hz to 16 kHz
EQ level adjustment: +/-6 dB
Bass and Treble adju/-6 dB
Automation Inputs:
Active low, momentary dry contact clo-
sures. Automation common is connected
to signal ground inside the JSD-80 through
a 10 Ohm resistor (to minimize ground loop
problems).
Automation Outputs (DB25):
Active low. Recommended indicator circuit
is a standard LED with a 1k series resistor
connected between 5 V and the automation
status line. (See Section 12.)
Power Input:
100-240 V AC 50-60 Hz @ 360 mA
JSD-80, Cinema Sound Processor
1.4 Technical Specifi cations:
Rack-mount chassis frame construction
with plug-in modules accessible behind
removable front panel.
Signal Connections
a. Standard 9-pin D-type female connec-
tors for Projector 1, Projector 2, Mic,
and RS-232 communications port.
b. Standard 25-pin D-type female con-
nectors for Analog eight-channel In-
put (Ext 1), Digital eight-channel (Ext
2) and automation I/O.
c. Standard 25-pin D-type Male for Moni-
tor output.
d. Detachable screw terminal connec-
tors are used for Automation inputs,
Hearing Impaired output, Line out-
puts, Changeover pulse, Remote fader
and Mute.
e. RCA jacks are used for Non/Sync and
Aux input.
Signal Inputs
a. Projector Inputs:
Voltage: 0.35 mV nominal
Impedance: 360 Ohms
Voltage adjustment: -23.9 to +11.9 dB
(.35 to 20 mV)
High Frequency Slit EQ: 10 to 32 kHz
b. Non-Sync Input:
Voltage: 300 mV rms
Impedance: 30 kOhms
Voltage adjustment: -24 to +6 dB (150-
750 mv)
c. Auxiliary Input:
Voltage: 300 mV rms
Impedance: >20 kOhms
Voltage adjustment: -23.9 to +11.9 dB
(75 mV-1.2 V)
d. Microphone Input:
Impedance (mic): 2 kOhms
Voltage adjustment: -23.9 to +11.9 dB
(1.1-17.6 mV)
e. Analog eight-channel Input:
Voltage: 300 mV rms
Impedance: >20 kOhms
