2
DUAL/STEREO COMPRESSOR/NOISE GATE CN-220
1. INTRODUCTION
........................................................................................................................................................................3
2. SWITCHES, CONTROLS, ADJUSTMENTS AND CONNECTORS
..........................................................................................4
FRONT PANEL
..........................................................................................................................................................................4
REAR PANEL
............................................................................................................................................................................5
3. WORKING PRECAUTIONS
......................................................................................................................................................6
4. INSTALLATION
.........................................................................................................................................................................6
UNPACKING
............................................................................................................................................................................6
MOUNTING
.............................................................................................................................................................................6
CHANGING THE VOLTAGE AND THE FUSE
........................................................................................................................6
CONNECTING TO THE MAINS
.............................................................................................................................................. 7
INPUT CONNECTION
............................................................................................................................................................. 7
UNBALANCED INPUT .........................................................................................................................................................8
BALANCED INPUT...............................................................................................................................................................9
OUTPUT CONNECTION
.........................................................................................................................................................9
UNBALANCED OUTPUT ................................................................................................................................................... 10
BALANCED INPUT.............................................................................................................................................................. 11
GROUND LINK
....................................................................................................................................................................... 11
5. OPERATION
............................................................................................................................................................................ 12
NOISE GATE
........................................................................................................................................................................... 12
TEST MONITOR SWITCH (SIDE TEST) ................................................................................................................................. 12
ACTIVITY LED’s (SHUT — OPEN)......................................................................................................................................... 13
HP AND LP KEY FILTER CONTROLS................................................................................................................................... 13
THRESHOLD CONTROL..................................................................................................................................................... 13
ATTACK TIME SWITCH ...................................................................................................................................................... 13
RELEASE TIME CONTROL................................................................................................................................................... 14
RANGE SWITCH ................................................................................................................................................................ 14
BYPASS SWITCH................................................................................................................................................................ 14
COMPRESSOR
....................................................................................................................................................................... 14
BAND COMPRESSOR CONTROL AND SWITCH ............................................................................................................... 14
THRESHOLD CONTROL..................................................................................................................................................... 14
COMPRESSION RATIO CONTROL..................................................................................................................................... 15
GAIN REDUCTION VUMETER ........................................................................................................................................... 15
BYPASS SWITCH................................................................................................................................................................ 15
COMMON
.............................................................................................................................................................................. 15
OUTPUT LEVEL CONTROL................................................................................................................................................. 15
OUTPUT LEVEL VU-METER................................................................................................................................................ 15
STEREO SWITCH ................................................................................................................................................................ 16
SIDE CHAIN CONNECTOR................................................................................................................................................ 16
6. OPTIONS
................................................................................................................................................................................. 16
SECURITY COVER (TP-1)
....................................................................................................................................................... 16
KEY LOCKED SECURITY COVER (TS-1)
................................................................................................................................ 16
7. BLOCK DIAGRAM AND HOW IT WORKS
............................................................................................................................17
8. REPAIR GUIDE
.........................................................................................................................................................................17
9. APPLICATION EXAMPLES
..................................................................................................................................................... 19
SUPPRESSING CROSSTALK IN MULTI-MIC APPLICATIONS
........................................................................................... 19
GATING DRUMS
................................................................................................................................................................... 19
REDUCING BACKGROUND NOISE
..................................................................................................................................... 19
REDUCING FEEDBACK IN MICROPHONES WITH HIGH COMPRESSION
.....................................................................20
LEVEL VARIATIONS IN VOICES AND INSTRUMENTS
.......................................................................................................20
RECORDINGS
........................................................................................................................................................................20
SPEAKER PROTECTION
........................................................................................................................................................20
PRODUCING THE TALKOVER EFFECT
................................................................................................................................. 21
INCREASING THE OUTPUT LEVEL OF A MIXING SIGNAL
................................................................................................. 21
SOUND PRESSURE LEVEL CONTROL
................................................................................................................................... 21
SELECTIVE SOUND PRESSURE LEVEL CONTROL
...............................................................................................................22
TIME CONTROL
.....................................................................................................................................................................22
10. TECHNICAL SPECIFICATIONS
.............................................................................................................................................23
11. WARRANTY
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