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14

 

          Chapter 3        

Installation Section 

Содержание XTRAMIXcxi

Страница 1: ...Ultra Compact Studio Line Mixer speck electronics Reference Manual Version 5b XTRAMIXcxi...

Страница 2: ...without permission the customer agrees to pay for parts and labor necessary to remove the modification before repair The cause of the defect is in the sole judgment of Speck Electronics Should a defec...

Страница 3: ...ster section Features Standard Accessories Regulated power supply Rack mount adapters Rubber Protectors Specifications Unpacking and Inspection Environmental Considerations Grounding Rack grounding Re...

Страница 4: ...Sends Stereo Effects Return Section Monitor Section Master Section Stereo Cue Return Section Stereo Aux Return Section Talkback Section Rear Panel Controls Input Channel Connections and Switches Effec...

Страница 5: ...per AC Grounding Quality AC system AC distribution Clock noise and AC Safety earth connection Electronics earth Proper Audio Grounding and Shielding EMI and RFI Sources of EMI Reducing EMI 44 44 44 44...

Страница 6: ...unded through the grounding conductor of the power cord To avoid electrical shock plug the power cord into a properly wired receptacle before making any audio connection to the mixer A protective grou...

Страница 7: ...2 Figure 1a Front Panel Layout Figure 1b Rear Panel Layout XTRAMIXcxi XTRAMIXcxi Chapter 1 Introduction Section...

Страница 8: ...oup 2 output mixer or any combination of the above mentioned configurations The mixer is divided into three basic sections The input section the effects send and return section and the master section...

Страница 9: ...witching Eight assignable subgroups available for all input channels and effects returns Effects send outputs have summing points so that other mixers aux outputs may be combined with the Xtramix send...

Страница 10: ...put Impedance Subgroup Insert Return Impedance Effects Sum In Impedance Effect Send Output Impedance Program Feed Output Impedance Monitor Feed Output Impedance Tuner Feed Output Impedance Subgroup Fe...

Страница 11: ...to indicate 0 VU Frequency response measured at program feed left Residual Noise Measurement Any primary line In to Program Out 89 dBu unweighted 95 dBu A weighted Test Conditions 0dBu signal at left...

Страница 12: ...avoid locating the Xtramix or any low level audio equipment immediately adjacent to power amplifiers power supplies or any source of Electromagnetic emissions To protect operating personnel the Nation...

Страница 13: ...erial number of the product Place the product in the original container if available If the original container in not available a suitable one can be purchased from Speck Electronics If the original c...

Страница 14: ...of the operators normal position in order to facilitate the use of the front panel controls Any device that emits a high EMI Electro Magnetic Interference or RFI Radio Frequency Interference energy fi...

Страница 15: ...ning the mounting location The power supply may be wired to operate with 100 VAC 120 VAC 220 VAC 230 VAC or 240 VAC 50 60hz Before applying AC power you should verify that the voltage setting on your...

Страница 16: ...into the receptacle on the power supply The connectors are keyed so they will only fit in one direction Next fit the rectangular plug into the connector at the rear of the Xtramix These connectors ar...

Страница 17: ...is made to operate the mixer it would be a good idea to set all the mixers controls to their neutral positions This gives you a reference point to work from when adjusting controls and switches All v...

Страница 18: ...hing the panel or markings Paper towels are not recommended Commercially available window cleaner solutions may be used however the solution should be applied to the cloth and not the panel to avoid t...

Страница 19: ...This page intentionally left blank 14 Chapter 3 Installation Section...

Страница 20: ...sign switches that are used in conjunction with the effects send pots for assignment to 8 effects send busses Each channel also incorporates an in place solo switch on the front panel and high low lev...

Страница 21: ...16 Figure 2 Input Channel Chapter 4 Operation Section...

Страница 22: ...o not automatically mix to the program monitor and headphone outputs They must be assigned to a subgroup first Once assigned to a subgroup the monitor level and pan for that respective subgroup is the...

Страница 23: ...Master Monitor or Headphone level although adjusting the Master Monitor or Headphone level will not affect any relative balance created with the Input Level Control Be aware that the solo circuit acti...

Страница 24: ...mono composite for the effects sends There are two Effects Send Controls available per input channel in the form of a black capped dual concentric potentiometer The smaller inner knob is labeled as th...

Страница 25: ...f the black capped concentric adjusts the level being sent to the selected Even effects bus This control is used in conjunction with the Even Effects Assign Switch and Even Assign Changeover Switch Wh...

Страница 26: ...21 Figure 3 Stereo Effects Return Channel Chapter 4 Operation Section...

Страница 27: ...when used in conjunction with the Channel Subgroup Assign Switches allows the effects return to be assigned to any of eight individual subgroups or any of four subgroup pairs When an effects return i...

Страница 28: ...oup Assign Switches will select subgroups 5 thru 8 Depressing this switch allows you to isolate any effect return to the Monitor and or Headphone outputs while maintaining stereo perspective The sourc...

Страница 29: ...24 Figure 4 Monitor Channel Chapter 4 Operation Section...

Страница 30: ...ive stereo mix level of all signals assigned to its associated assign subgroup With the Monitor s Pre Post switch see rear panel set to Pre this control will function independent of the assign Subgrou...

Страница 31: ...is allows you to solo multiple monitor channels while retaining their relative levels Depressing this switch deletes the Bus Subgroup signal from the Monitor Program and Headphone feeds although its a...

Страница 32: ...27 Figure 5 Master Section XTRAMIXcxi Chapter 4 Operation Section...

Страница 33: ...ssed this LED will change from green to red These 10 segment VU volume units meters indicate the relative levels of the stereo program and 8 subgroup outputs and are sensitive from 20db to 3db Dependi...

Страница 34: ...ster Typically the monitor outputs would be connected to a stereo power amplifier for purposes of driving a personal monitoring system However in situations where the Xtramix is interfaced to for inst...

Страница 35: ...amplifier via a dedicated headphone box the input sensitivity of the Cue Return has been calibrated accordingly Do not attempt to connect the speaker terminals of any power amplifier directly into th...

Страница 36: ...microphone will operate most efficiently when the operator speaks at a distance of about two feet from the mike This mike is activated by the Talkback Switch and is adjusted with the Talkback Trim Co...

Страница 37: ...32 Figure 6 Input Channel Connectors and Switches Chapter 4 Operation Section...

Страница 38: ...gnal to any stereo input channel use only the left input connector Doing so effectively converts the channel status from stereo to mono thereby eliminating the need for any external Y type connections...

Страница 39: ...34 Figure 8 Effects Monitor and Subgroup Connectors Chapter 4 Operation Section...

Страница 40: ...3 This potentiometer adjusts the output level to the outboard effects device itself of all channel signals routed to an Effects Send Master via its associated channel s Effects Send Controls When matc...

Страница 41: ...four odd subgroups 1 3 5 7 see Effects Return Assign Switches on the front panel Typically this input is utilized to connect the right output of a stereo effects device When an effects return is opera...

Страница 42: ...ut for the return of any stereo line level signal such as a analog digital or hard disk recorder A discrete mono signal may be utilized when plugged into the left connector only These 1 4 input connec...

Страница 43: ...38 Figure 10 Master Input Output Connectors Chapter 4 Operation Section 23...

Страница 44: ...before pre the Program Master Level Control This means that any device interfaced to this jack will be processed before the Program Master Level Control and will not be affected by any adjustments of...

Страница 45: ...be wired accordingly See figure 11b These balanced 1 4 TRS phone type connectors are the left right outputs for the stereo program master The signal present at these jacks is adjusted by the Program M...

Страница 46: ...or the monitor and headphones are before Pre the Program Master Control When set to this position any adjustment to the Program Master Control will have no direct affect on the monitor or headphone ou...

Страница 47: ...dio signal A discrete mono signal may be utilized when plugged into the left connector only Connections to the Cue return stereo input should be made with standard unbalanced tip and sleeve TS 1 4 plu...

Страница 48: ...erator will be required to perform this adjustment This 4 pin connector will accommodate the connector from the power supply cable The connectors are keyed so they will only fit in one direction For i...

Страница 49: ...44 Chapter 4 Operation Section This page intentionally left blank...

Страница 50: ...en add one synth to the mixer at a time carefully listening and monitoring your progress If a problem arises such as a buzz hum intermittent signal or nonexistent signal stop at that point and solve t...

Страница 51: ...hen using a larger rack system it is recommended that a dedicated and isolated AC service be provided This service should have its own AC wires isolated receptacle and breaker and not be shared with o...

Страница 52: ...likely be your audio equipment and would result in unwanted buzzes or hums In order for any audio signal such as a synth signal to get from the synth to the mixer it requires a minimum of 2 conductors...

Страница 53: ...by other electronic devices There are natural and man made sources of EMI that you can t do anything about These sources include radio TV and radar transmitters as well as motors lights and computers...

Страница 54: ...Appendix A 49 Signal Flow Diagram Part A...

Страница 55: ...Appendix A 50 Signal Flow Diagram Part B...

Страница 56: ...witchcraft 297 Balanced Effects Sends 1 8 T R S Switchcraft 297 Balanced Effects Sum 1 8 T R S Switchcraft 297 Unbalanced Tuner Output T R S Switchcraft 297 Balanced Headphone Output T R S Tip Left Ri...

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