Klark Teknik Square one, Operator'S Manual

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Page 3: ...71 Email info uk telex com Website www ktsquareone com Square ONE Splitter Operator Manual DOC02 SQ1SPLITTER Issue B January 2008 Telex Communications UK Limited In line with the company s policy of continual improvement specifications and function may be subject to change without notice This Operators Manual was correct at the time of writing E OE ...

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Page 5: ...ounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only us...

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Page 7: ... inserting or dropping foreign objects such as paper plastic metal etc into any gaps or openings on the equipment for example vents If this happens turn off the power immediately and unplug the power from the a c outlet Then have the equipment inspected by the manufacturer s qualified service personnel Installation Before installing and connecting up the equipment check that both the mains supply ...

Page 8: ...nterference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is...

Page 9: ...dderminster UK 19th October 2007 Managing Director Business Line R D Director Business Line Printed name John Oakley Printed name Simon Harrison Product Type Number Product Description Nominal Voltage s Current Freq Square ONE Splitter Microphone Splitter 115V AC 230V AC 400mA 200mA 50 60Hz reference number title 2004 108 EC EMC Directive EMC 2006 95 EC Low Voltage Directive LVD reference number t...

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Page 11: ...o unbalanced equipment 8 Powering the unit 8 Front panel 9 FIXED GAIN ISOLATED OUTPUT C PARALLEL INPUT section 9 ACTIVE SPLITTER section 10 Phones power and media split section 11 Rear panel 12 Channel I O connections 12 Media split and ground lift switches 13 Mains supply 13 Operation 14 Basic operation 14 Solo bus operation 14 Using headphones 14 Media split mode 15 Using the ground lift switche...

Page 12: ...tion 20 Crib sheet 22 More about splitters 23 Introduction 23 Passive parallel splitter 24 Isolated splitter 25 Active splitter 26 Balanced audio 27 Service information 28 Routine maintenance 28 Cleaning the unit 28 Checking replacing the mains fuse 28 ...

Page 13: ...nitoring MON multi track recording live broadcasting or indeed any other requirement see Figure 1 Typical channel I O connection options on page 2 Although the Square ONE Splitter is a cost effective unit its signal integrity and audio performance mean it can be used with any console and the quality of its preamp and circuitry can enhance the audio performance of lower cost consoles The Square ONE...

Page 14: ...omatically adapts to mains voltages in the range 100 to 240 volts 50 to 60Hz An LED on the front panel indicates when power is applied to the unit there is no mains power on off switch Figure 1 Typical channel I O connection options Analogue or digital multi track recorder Parallel inputs Transformer balanced output Electronically balanced output Front panel Rear panel FOH console for example the ...

Page 15: ... indicate 15dB 0dB 12dB and 21dB Additional features include Headphone output 1 4 jack and level control to monitor the solo bus Two global ground lift switches one for each set of electronically balanced outputs Media split switch for routing channel 8 to all 16 electronically balanced outputs Phantom power sensing for remotely enabling 48V on the inputs when phantom power is activated from any a...

Page 16: ...t required The Square ONE Splitter can assist in the elimination of ground loops within the system if required by utilising the integral LIFT switches that can disconnect the XLR pin one terminal on one both or neither output sets OUT A or OUT B as required As a secondary function the Square ONE Splitter also provides a transformer isolated output for every channel This is intended for varied and ...

Page 17: ...develop intermittent faults on some individual signal lines If this occurs there is normally little time available to de bug the problem fully before the show However the Square ONE Splitter provides a solution for such circumstances by providing an additional parallel input on the front panel of the unit for emergency connection of a spare mic or individual replacement cable These inputs can also...

Page 18: ...2U of rack space Four rack mount holes in the front panel are provided for rack mounting and are designed to fully support the weight of the unit in the rack Note Avoid over tightening the rack mount screws as this could damage the front panel The position of the unit will depend upon how it is to be used However when positioning the unit avoid placing it where the control knobs may be damaged by ...

Page 19: ...ol knob the gain range being adequate to accommodate most mics keyboards DI boxes backline preamp outputs and active guitar basses However passive guitars require a high impedance load and should be connected via a suitable active DI box such as the Klark Teknik DN100 Channel I O pin outs The following diagram shows the pin outs for both the male and female chassis connectors on the Square ONE Spl...

Page 20: ...u do have to connect to unbalanced devices the following wiring is recommended for best results Figure 3 I O connections to unbalanced devices Powering the unit Switch the power on at the mains power outlet The Square ONE Splitter does not have a mains power on off switch Your unit is now ready to operate Ground ve ve Ground ve ve Unbalanced device 1 3 2 2 1 Pin 1 Screen Ground not connected at ba...

Page 21: ...Phones power and media split see Phones power and media split section on page 11 4 Four cut outs for rack mounting FIXED GAIN ISOLATED OUTPUT C PARALLEL INPUT section The functions of channels 1 to 8 in this section are similar although the input of channel 8 is also used for the media split function 1 TX OUT 1 to TX OUT 8 sockets Eight transformer isolated balanced outputs each with a male XLR ch...

Page 22: ...l before it is sent to the electronically balanced outputs Range is from 0dB to 40dB in 5dB steps Note The transformer isolated outputs are derived before the mic amp gain stage and are buffered and driven at 6dB operating gain with no user adjustment available 5 Yellow LED for 30Hz switch 6 30Hz switch Switches the 30Hz high pass filter on off Operating at 30Hz the filter acts as an anti rumble f...

Page 23: ...nabling you to monitor the solo function 3 Blue POWER LED Mains power on off indicator When LED is illuminated mains power is on There is no mains on off switch on the Square ONE Splitter 4 Yellow MEDIA SPLIT LED Illuminates to indicate that media split is in operation This has a duplicate LED on the rear panel see item 5 in Media split and ground lift switches on page 13 Note Headphone output inc...

Page 24: ...h the unit Channel I O connections The functions of channels are 1 to 8 in this section are similar although the input of channel 8 is also used for the media split function see Media split and ground lift switches on page 13 Please refer to Connecting the audio cables on page 7 for pin assignments 1 OUT A sockets Eight electronically balanced outputs each with a male XLR chassis connector 2 OUT B...

Page 25: ...ED for MEDIA SPLIT switch This LED is duplicated on the front panel see ACTIVE SPLITTER section on page 10 6 MEDIA SPLIT switch Recessed switch for switching the unit to media split mode see Media split mode on page 15 for details of operation Mains supply 1 IEC socket Auto voltage sensing switch mode power supply that operates where the nominal mains voltage is in the range 100V a c to 240V a c 2...

Page 26: ...planned increases in level during performance Both the transformer isolated and electronically balanced outputs offer exceptional audio quality combined with excellent line driving capability However the transformer outputs may be preferred in situations where absolute electrical isolation must be maintained such as running feeds to mobile studios or outside broadcast facilities The fixed gain of ...

Page 27: ...gain mic preamps If doing so best practice is to set the unused mic gains to minimum Using the ground lift switches If you are experiencing ground loop problems switch on one or both of the ground lift switches that is OUTPUT A LIFT and OUTPUT B LIFT on the rear panel Each ground lift switch lifts or disconnects globally its respective set of eight outputs OUT A or OUT B on all eight channels The ...

Page 28: ... FOH and MON split and broadcast out In a live broadcast situation the Square ONE Splitter may be used to split the stage mic line signals at source Outside Broadcast Guitar Mic Keyboard To inputs Square ONE Splitter From electronically balanced outputs From transformer isolated output Broadcast FOH console for example the Midas Verona MON console for example the Midas Siena ...

Page 29: ...ommended that the transformer balanced outputs are used to feed the recorder or recording console especially if the grounding scheme is outside the control of the public address PA operator To inputs From electronically balanced outputs From transformer isolated output Guitar Mic Keyboard Square ONE Splitter FOH console for example the Midas Verona MON console for example the Midas Siena Analogue ...

Page 30: ...s live broadcast application the Square ONE Splitter provides isolated feeds from the group outputs of the FOH live sound console Outside Broadcast Guitar Mic Keyboard Broadcast Square ONE Splitter From transformer isolated output To input FOH console for example the Midas Verona ...

Page 31: ...nd 48V TX OUT 8 Media Split switches outputs 1 7 OUT A OUT B 30Hz 0 1 2 2 1 5 1 OUTPUT SOLO SOLO PHONES LEVEL 10 0 10 PHONES MEDIA SPLIT MEDIA SPLIT PUSH IN 1 IN 8 PUSH GAIN 0 20 35 40 5 15 10 30 25 GAIN 0 20 35 40 5 15 10 30 25 Remote 48V enable OUT A OUT B Remote 48V enable Note As channels 1 to 7 are identical this diagram only shows the audio signal path for channels 1 and 8 ...

Page 32: ... socket 750mW nominal 50 ohm load Terminations Audio Power Front panel connectors Channel input eight x AA series female XLRs labelled IN 1 to IN 8 Isolated output C eight x AA series male XLRs labelled TX OUT 1 to TX OUT 8 Headphone output one 1 4 TRS balanced jack socket Rear panel connectors Channel input eight x AA series female XLRs labelled IN 1 to IN 8 Electronic output A eight x AA series ...

Page 33: ...mm 7 7 8 Weight Net Shipping 4 5 kg 5 7 kg 1 Measurement conditions unit powered all filters bypassed unity gain and output terminated with 20k ohm balanced loads 2 Measurement conditions unit powered both inputs terminated with 150 ohms all filters bypassed unity gain set to 0dB and outputs terminated with 20k ohms balanced loads 3 Measurement conditions unit powered all inputs terminated with 15...

Page 34: ...5 40 5 15 10 30 25 48V 0 SOLO OUTPUT GAIN 30Hz 0 5 1 21 2 1 20 35 40 5 15 10 30 25 48V 0 SOLO OUTPUT GAIN 30Hz 0 5 1 21 2 1 20 35 40 5 15 10 30 25 48V 0 SOLO OUTPUT GAIN 30Hz 0 5 1 21 2 1 20 35 40 5 15 10 30 25 48V 0 SOLO OUTPUT GAIN 30Hz 0 5 1 21 2 1 20 35 40 5 15 10 30 25 48V 0 SOLO OUTPUT GAIN 30Hz 0 5 1 21 2 1 20 35 40 5 15 10 30 25 48V 0 SOLO OUTPUT GAIN 30Hz 0 5 1 21 2 1 20 35 40 5 15 10 30 ...

Page 35: ...devices However more advanced solutions are required to cope with factors within a sound system that cause signal degradation and produce external noise and radio frequency RF interference These factors include the number of splits required and the length of cable runs and also the inherent problems imposed by the low level of the mic signal and multiple grounding The types of splitter and how the...

Page 36: ...lengthy mic cable runs also significantly increase capacitance which in turn reduces the high frequency content making the sound dull and uninspiring Also the input impedance of each console added to the system will reduce the overall level Phantom powered mics are normally supplied via two 6k8 ohm resistors If additional 48V sources are enabled in parallel this increases the current and voltage p...

Page 37: ... the problem of sensitive low level mic signals being carried over long distances and their susceptibility to picking up additional noise from other sources which is ultimately amplified at the mixing console When using a 1 1 1 1 ratio transformer the loading on the mic and the extra capacitance remains resulting in high frequency loss Also the input impedance of each console added to the system w...

Page 38: ...urate sound Ground lift switches are provided on the electronic outputs to enable isolation if required In addition a transformer isolated output normally derived as a copy of the post preamp signal but on the Square ONE Splitter is tapped off before the gain stage is buffered and driven making it relatively safe from external interference This would typically be used for broadcasters who prefer t...

Page 39: ... third is a grounded shield that surrounds the hot and cold cables An unbalanced connection only has two cables one of which the grounded shield is also used for signal return As the hot and cold cables are of equal voltage and the same source impedance but of opposite polarity when they are subtracted any noise voltages caused by interference and noise pick up appearing identically on both cables...

Page 40: ...dry lint free cloth Do not use harsh abrasives or solvents When cleaning the unit take great care not to damage control knobs pushbuttons etc Checking replacing the mains fuse The equipment must be independently isolated from the mains voltage supply before any attempt is made to change or check the protective fuse The fuse must always be replaced and its drawer closed before the equipment is reco...

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Page 42: ...k Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7HJ England Tel 44 1562 741515 Fax 44 1562 745371 Email info uk telex com Website www ktsquareone com 2008 Telex Communications UK Limited ...