System Modules; Input Module; Output Module; Control Module - Usl JSD-80 Manual

Section 4: System Modules

4.1 Input Module

The Input Module contains the projector
preamps plus Non-Sync, Auxiliary and Mic
inputs. It also contains the bypass circuitry.
Two high-power DSPs implement "A" type
and "SR" noise reduction. A third DSP is
used for the matrix decoder, slit eq analyzer
and pink noise generator. Test points permit
connection of an oscilloscope to align the
fi lm projector's analog reader. LEDs indicate
the presence of left, center, right and sur-
round signals. Bicolor LEDs indicate the
correct level for LT and RT preamp inputs.
A status LED indicates the module is in a
"fault" condition.
1. Projector 1 Bypass Level Adjust
2. Projector 2 Bypass Level Adjust
3. Left Channel Test Point
4. Projector 1 Indicator green LED
5. Right Channel Test Point
6. Projector 2 Indicator red LED
7. Ground Test Point
8. Bypass level test point
9. *Left channel level indication.
10. *Right channel level indication.
11. Signal presence LEDs left to right: L,
C, R, Surround
12. THX pink noise enable jack
13. Status: Fault red LED
*A red color indicates signal is "low,"
a green color means OK, fl ashing red
indicates "high."

4.2 Output Module

The Output Module contains the eight-chan-
nel analog and AES-EBU input circuitry. It
also contains the balanced output circuitry.
Two high-power DSPs implement seven
channels of 1/3 octave equalization, plus a
parametric subwoofer equalizer. Test points
on each channel permit connection of diag-
nostic instruments. Level LEDs indicate the
presence of signals. A status LED indicates
the module is in a "fault" condition.
USL, Inc. JSD-80 Instruction Manual
1. Test Point. Gnd.
2-16. Signal presence LEDs left to right:
L, C, R, Sw, Ls, Rs, Bsl, Bsr, (or Lc,
Rc)
3-17. Test point left to right: L, C, R, Sw,
Ls, Rs, Bsl, Bsr (or Lc, Rc)
18. Status Light

4.3 Control Module

The Control Module manages all the com-
munication in the unit. It also contains the
automation interface, bypass volume and
remote volume circuitry.
On the Control Module is a "Non-Volatile
Flash" memory card known as the "Person-
ality Module." This module contains a copy
of all the installation alignment settings
made to the unit. If there is a failure of any of
the three internal modules, a technician will
be able to re-install the original alignment
settings without requiring a laptop. settings without requiring a laptop.
1. Personality Module
2. Write Protect Switch
3. Write Protect Indicator LED
4. Restore Switch
5. Restore
6. Fault
Note: When using the laptop inter-
face, prior to saving the confi guration
and parameters to the Personality Mod-
ule (1), you must slide the Write Protect
Switch (2) to the left (OFF) to allow writ-
ing to that module. Please remember to
turn the Write Protect Switch (2) to "ON"
after the data is saved to the Personality
Module (1).
Page 14
3rd Edition. February, 2006