Alto_CLE2.0_Compressor_Service_Manual.pdf

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Service Manual
Model: CLE2.0
Compressor / Limiter / Gate
www.altoproaudio.com
Version: 1.1
CONTENTS
1. Specification
2. Block Diagram
3. Schematic Diagram
4. Printed Circuit Board
5. Wiring Diagram
6.
---------------------------
Test Procedure
-------
7. Electrical Parts List
8. Exploded Views & Mechanical Parts List
9. Notes
1.Specification
INPUT
Connectors
Type
Impedance
Nominal operating level
Max input level
CMRR
XLR and 1/4” TRS (Pin 2 and Tip hot)
Electronically balanced/unbalanced, RF filtered
Balanced >50Kohm, Unbalanced>25Kohm
+4dBu/-10dBV switchable
>+24dBu balanced and unbalanced
Typically>50dB at 1KHz
OUTPUT
Connectors
Type
Impedance
Max output level
XLR and 1/4” TRS (Pin 2 and Tip hot)
Electronically balanced/unbalanced, RF filtered
Balanced 120ohm, Unbalanced>60ohm
>+21dBu,+20dBm balanced and unbalanced
SIDECHAIN INPUT
Connectors
Type
Impedance
Max input level
1/4” TRS (Tip hot)
RF-rejecting, DC de-coupled, unbalanced input
>10Kohm
>+24dBu
SIDECHAIN OUTPUT
Connectors
Type
Impedance
Max input level
1/4” TRS (Tip hot)
RF-rejecting, DC de-coupled, unbalanced output
2Kohm
>+21dBu
SYSTEM SPECIFICATIONS
Bandwidth
Frequency Response
Noise
THD
IMD
Crosstalk
Stereo Coupling
20HZ to 20kHz, +0/-0.5dB
0.35Hz to 200kHz,+0/-3dB
>-95dBu, unweighted, 22Hz to 22kHz
<0.008% Typical at +4dBu, 1kHz, unity gain
<0.04% Typical at +20dBu, 1kHz, unity gain
<0.1% Typical SMPTE
<-100dB, 22Hz to 22Khz
True RMS detection
EXPANDER/GATE SECTION
Type
Threshold
Ratio
Attack
Release
Interactive Expander (Interactive Ratio Control)
variable (OFF to +15dB)
variable (1:1 to 1:8)
<1ms/50dB, program dependent
variable (SLOW:100ms/1dB,FAST:100ms/100Db)
COMPRESSOR SECTION
Type
Threshold
Ratio
Threshold Characteristic
Manual Attack Time
Manual Release Time
Auto Attack Time
Auto Release Time
Output level
Interactive Compressor (Interactive Knee Adaptation)
variable (-40dB to +20dB)
variable (1:1 to ¡Û :1)
variable (Interactive or Hard Knee)
variable (0.5ms to 100ms / 20dB
variable from 0.05 ms to 5s / 20dB
Typical 15ms at 10dB, 5ms at 20dB, 3ms at 30dB
Program dependent, typical 125dB/s
variable (-20dB to +20dB)
PEAK LIMITER SECTION
Type
Threshold
Ratio
Stage 1 Limiter Type
Attack Time
Release Time
Stage 2 Limiter Type
Attack
Release
Interactive Gain Control Peak Limiter
variable (+4dB to OFF (+22dBu))
¡Û:1
Clipper
“zero”
“zero”
Program Limiter
program dependent, typ. <5ms
program dependent, typ. 20dB/s
FUNCTION SWITCHES
SC EXTERN
SC MON
INTERACTIVE
CONTOUR
AUTO
I/O METER
IN/OUT
OPERATING LEVEL
COUPLE
Switches the detector section to the external SC input.
Monitoring the external SC input, disengaging the
normal audio.
Enables the “Interactive Knee Adaptation”
characteristics.
Allows for frequency dependent detection.
Enable the automatic and program dependent setting of
the Attack-/Release times, disengaging the manual
Attack-/Release controls.
Switches between input and output for the Level Meter.
Relay controlled hard-bypass
Changes the internal reference level from +4 dBu to –
10dBu.
Linking both channels for stereo operation. Channel 1
becomes master.
INDICATORS
GAIN REDUCTION
INPUT/OUTPUT LEVEL
Expander/Gate Threshold
Compressor Threshold
Peak Limiter Threshold
Function switch
12 element LED display:
1/2/4/6/9/12/15/18/21/24/27/30 dB.
8 element LED display:
-30/-24/-18/-12/-6/0/+3/+6/+9/+12/+18 dB
2 LED for under “+” and above “-“
3 LEDs for under “+”,Interactive “0” and above “-
1 LED for indication of limiter function.
LED indicator for each
POWER SUPPLY
Mains Voltages
~120VAC, 60Hz
~240VAC, 50Hz
~230VAC, 50Hz
~100-120VAC,
General Export Model
~200-240VAC, 50-60Hz
100-120VAC : 400mA (SLOW-BLOW)
200-240VAC : 200mA (SLOW-BLOW)
14 Watts
Standard IEC receptacle
USA/Canada
U.K./Australia
Europe
Fuse
Power consumption
Mains Connection
PHYSICAL
Dimension
Net Weight
W(483.0)*D(198.0)*H(44.2) mm
3.3Kg

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