ITC T-8S02 Operation Manual Download Page 16 | Manualshive

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The mixer has several built-in features which are easily activated by making adjustments inside the
mixer chassis. Changing the selection of all built-in features requires only the correct placement of
internal jumpers or varying the settings of an internal potentiometer.

Note

: All the internal components-jumpers and potentiometers-to which adjustments are needed for

built-in features are highlighted within dashed areas in the drawing below.

Warning

: Adjustments made to any other internal components may void the warranty.

16

5.5 Special Features Activation

OPERATION

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Summary of Contents for T-8S02

Page 1: ...yfor future reference MIXER PRE AMPLIFIER OPERATION MANUAL OPERATION MANUAL PUBLIC ADDRESS SYSTEM T 8S02 1 2 3 4 5 6 7 8 AUX M A M A M A M A M A M A M A M A BUS BUS BUS BUS BUS BUS BUS BUS CUT CUT CUT CUT CUT CUT CUT CUT LOW LOW LOW LOW LOW LOW LOW LOW T 8S02 HEADPHONE POWER MAIN LIMIT THRESHOLD RATIO ON OFF 18 12 6 3 0 3 6 12 20 20 100 0 ...

Page 2: ...3 3 Helpful hints 8 4 INSTALLATION 9 5 OPERATION 11 5 1 Troubleshooting Gain Structure 12 5 2 Recommended Input Wiring Methods 13 5 3 Fine Tuning 14 5 4 Compressor Limiter 15 5 5 Special Features Activation 16 5 6 Jumper Options 17 6 TROUBLESHOOTING TIPS 18 7 GLOSSARY 19 8 TECHNICAL INFORMATION 20 9 BLOCK DIAGRAM 21 2 ...

Page 3: ...esult in fire or electric shock Be sure to replace the unit s terminal cover after connection completion Because high voltage is applied to the speaker terminals never touch these terminals to avoid electric shock Be sure to ground to the safety ground earth terminal to avoid electric shock Never ground to a gas pipe as a catastrophic disaster may result Avoid installing or mounting the unit in un...

Page 4: ...ing sooty smoke or steam as doing otherwise may result in fire or electric shock When the Unit is in Use Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury and or property damage In addition the object itself may fall off and cause injury and or damage Make sure that the volume control is set to minimum position before power is switched...

Page 5: ...lector switch of line and Mic 8 each input can gain control 9 each input is with low cut filter 10 phantom power offer power for condenser Mic 11 each input seperately control knob input PWL 12 main output spare output seperately control knob 13 airproof potentiometer to low noise and long life 14 external power source 15 main output with compressor 16 compressor with by pass switch 17 compressor ...

Page 6: ...the signal level of either the main or auxiliary bus and to indicate either the average or peak signal See page 18 for details 7 Threshold Control Screw pot adjustment sets the signal level 20 to 20 VU factory setting is 0 VU at which the Compressor Limiter becomes active 8 Ratio Control Screw pot adjustment sets the amount of compression 0 100 factory setting is 100 of the signal above the thresh...

Page 7: ...ary Bus Output Balanced line level connection to auxiliary output bus 5 Main Output Microphone Line Switch Selects main output to be either MIC 50dB or line 0dB level 6 Main Bus Output Balanced connection to main output bus 7 Auxiliary Input Balanced buffered uncontrolled line level terminals for additional ninth input connection directly to the summing buses selected by internal jumpers The facto...

Page 8: ... frequency devices and other electromagnetic field sources such as Fluorescent lights Electrical motors SCR dimmers AC power lines etc Note Always use 2 conductor shielded cable to reduce EMI or RF interference to the Line MIC inputs Keep the mixer and other equipment clean and free of dust by wiping occasionally with a soft damp cloth Protect the mixer from electrical damage by disconnecting it f...

Page 9: ...nd Auxiliary 3 to zero 1 AUX M A M A BUS BUS CUT LOW HEADPHONE POWER MAIN LIMIT THRESHOLD RATIO ON OFF 18 12 6 3 0 3 6 12 20 20 100 0 1 2 3 Turn amplifier s volume controls to the 7 o clock position B Connect Inputs Connect lead into desired pluggable terminal strip 6 on rear panel Press Input Pad Microphone Line Switch 5 to appropriate position in for line input or out for MIC input Note that the...

Page 10: ...AC power outlet and to the AC Power Jack 4 located on far left side of rear panel E Power up mixer GND 17VCT AC 4 Press Power Switch 8 to in position Power Indicator LED 7 will be lit if mixer is powered Set Main Output Volume Control Knob 5 to 2 o clock If auxiliary output is desired also set Auxiliary Output Volume Control Knob 6 to 2 o clock AUX HEADPHONE POWER MAIN LIMIT THRESHOLD RATIO ON OFF...

Page 11: ... Main Output Volume Control Knob 3 on the front panel controls the mixer s final amplifier stage to the master output This control should optimally operate between the 9 and 2 o clock positions when gain structure is correct With all channels operating the main output meter should show a signal output range between 0 and 6VU Adjust the main output control accordingly If the output occasionally pea...

Page 12: ...de adequate volume the input gain setting is too low Turn the volume control knob to the 1 o clock position and increase the input gain by turning the input gain trim control clockwise until clipping occurs or VU meter is over 0 VU Then adjust the gain to a setting just below the clipping level If channel volume is too high If a channel is not clipping but must be set below the 9 o clock position ...

Page 13: ...hown below This method can solve certain ground loop problems It has 6dB gain and good noise and ground loop rejection Unbalanced Source to Balanced Input Method 1 For an unbalanced source device the drawing below shows the best wiring method Because of the design of the mixer this wiring provides a slight 6 dB boost and moderate noise and ground loop rejection Unbalanced Source to Balanced Input ...

Page 14: ...rimarily with mic level input It is particularly effective when handheld mics are used M A BUS CUT LOW 1 Phantom Power If a condenser microphone s is not independently powered press Phantom Power Switch 2 to the on position ON OFF PHANTOM POWER GND 17VCT AC 1 The phantom power switch will power condenser capacitor Mics through the Mic cable Depressing the button simultaneously applies phantom powe...

Page 15: ...ets what signal level will activate the Compressor Limiter It has a range of 20 to 20 dB The Ratio Control 4 is a screw potentiometer that sets the compression ratio that will be applied when the signal exceeds the threshold It has a range from 0 to 100 ACompressor becomes a Limiter when the compression ratio is 10 1 or greater The factory setting for the threshold is 0 VU 4 dB but this is variabl...

Page 16: ...rrect placement of internal jumpers or varying the settings of an internal potentiometer Note All the internal components jumpers and potentiometers to which adjustments are needed for built in features are highlighted within dashed areas in the drawing below Warning Adjustments made to any other internal components may void the warranty 16 5 5 Special Features Activation OPERATION ...

Page 17: ...This is the factory default Note The meter will operate only when a jumper is in one of these two positions Bus Routing Options AUX In Jumpers JP4 These jumpers determine the destination of the Auxiliary Input The choices are MAIN installed Auxiliary Input is routed to Main Output AUX installed Auxiliary Input is routed to Auxiliary Output MAIN and AUX both installed Auxiliary Input is routed to b...

Page 18: ...e at the 7 o clock position Make sure that all unused input channels have the MIC Line switch in the Line position Make sure the MIC Line switch is in the correct position for both the inputs and the main output Hum MIC lines can easily cause hum Make sure to locate them away from vibration and magnetic field sources motors power supplies and lines and data lines Check MIC lines especially the shi...

Page 19: ...ground pathways exist between two or more devices and which can cause hum in the audio signal Jumper Ashort length of conductor used to connect pins electrically Limiter Adevice that severely at rates greater than 10 1 restricts the upper dynamic range of a signal by regulating the rate of increase of an input signals amplitude so that it will not exceed a predetermined threshold Line Microphone L...

Page 20: ...mum Level input trim pot max gain 70 dB line pad off 20 dB line pad on Maximum Level input trim pot min gain plus 20 dB headroom 30 dB line pad off 20 dB line pad on AUXILIARY INPUT Input Impedance 20k ohm balanced Nominal Input Level 0 dB OUTPUTS Output Impedance 220 ohm unbalanced 440 ohm balanced Nominal Load Impedance 600 ohm Nominal Level 4 dB RMS Maximum Level 26 dB RMS Balanced Main Output ...

Page 21: ...9 BLOCK DIAGRAM 21 JP3 JP2 JP1 JP4 BLOCK ...

Page 22: ...PUBLIC ADDRESS SYSTEM VersionV0 1 ...

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