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V7 / V12a

Installation &

User Guide

October 2017

Hearing Loop Drivers

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Summary of Contents for V12a

Page 1: ...1 V7 V12a Installation User Guide October 2017 Hearing Loop Drivers ...

Page 2: ... Cable Lengths Troubleshooting Technical Specifications Standards 3 4 5 7 8 17 21 23 24 26 Contacta has a policy of continuous product development therefore small specification changes may not be reflected in this manual Images labels packaging accessories and product colours are subject to change without notice ...

Page 3: ...er with integral phase shifter for phased array configuration Both hearing loop drivers have Class D amplifier output stages and an audio subsystem built around an advanced DSP core Combined with a powerful CPU that ensures peak performance they use cutting edge technology proven in the pro audio world to achieve life like speech and first class music reproduction Note For large area hearing loop ...

Page 4: ...ment A length of loop cable determined by the loop design is also required Hearing loop drivers also require ancillary equipment for audio feeds such as a microphone or sound system 5 6 1 Rubber Feet x4 2 5 08mm Euro Block Connector x2 3 3 81mm Euro Block Connector x2 4 Signage 5 V12a Hearing Loop Driver 6 Installation User Guide 7 Power Supply PS 60 8 IEC Power Lead 4 8 7 V7 V12a 1 2 3 5 6 4 8 7 ...

Page 5: ...3 Line Input 2 XLR balanced line input feedthrough 4 Power Supply Input V7 DC Power Input 2 1mm 14Vdc 2 14A V12a DC Power Input 2 1mm 24Vdc 4 17A Caution Use only the provided Power Supply 5 Loop A Output 5 08mm Euro block 6 Loop B Output 5 08mm Euro block V12a only Rear Panel Connections Connections 1 2 3 4 5 6 Note Only connect to one Line Input at a time ...

Page 6: ...6 Connection Examples XLR to XLR line TRS to XLR line Unbalanced to XLR XLR to Euroblock balanced Unbalanced to Euroblock ...

Page 7: ...t with the hearing loop s has been found The driver will halt operation with this message displayed on screen as such a fault would cause stress to the driver were normal operation to continue Switch off the driver and carefully check the loop s for shorts to ground Rectify the faults and re apply power to the driver Incorrect Power The power input supply voltage from the mains power supply is inc...

Page 8: ...cking and making adjustments to the V7 V7 1 Clip Status Light When lit this status LED indicates the signal on Hearing Loop A is clipping see Troubleshooting on page 23 for appropriate solutions 2 Clip Status Light When lit this status LED indicates the signal on Hearing Loop B is clipping see Troubleshooting on page 23 for appropriate solutions 3 Display Screen Indicates the status of the Loop Ou...

Page 9: ...he screen to the next menu item and rotating the dial anti clockwise will move it to the previous menu item The menu options are as follows The hearing loop driver will power up in Output Current Display Mode and will be locked from entering Adjustment Mode 1 To unlock the hearing loop driver press the control dial and when prompted Unlock driver click Yes 2 Enter the passcode 2239 a Rotate the co...

Page 10: ...d right position Rotate the dial clockwise or anti clockwise to make the adjustment Press the control dial in to confirm the selection and return to the main menu If the control dial is not used for 120 seconds when in Adjustment Mode the hearing loop driver will revert to the main menu with Loop Output as the default screen ...

Page 11: ...indicates the strength of the loop output level adjustment To alter the loop output level enter Adjustment Mode To increase the loop output level rotate the control dial clockwise To decrease the loop output level rotate the control dial anti clockwise Press the control dial once to confirm the selection and return to the main menu The hearing loop driver s Loop Output section displays the real ti...

Page 12: ...ise Press the control dial once to confirm the selection and return to the main menu Line Input The hearing loop driver s Line Input section displays the line input level within a range of 47dB The text on the display indicates if the correct line level has been achieved Low indicates the line level is too low for the automatic gain control to operate Good indicates the line level is at an optimum...

Page 13: ...l dial clockwise or anti clockwise in Adjustment Mode will toggle the phantom power on or off Press the control dial once to confirm the selection and return to the main menu Phantom power for a connected microphone is set off as the default setting ...

Page 14: ...ce to confirm the selection and return to the main menu The hearing loop driver s Microphone Input section displays the microphone input level within a range of 47dB The top line of the display indicates if the correct microphone input level has been achieved Low indicates the microphone level is too low for the automatic gain control to operate Good indicates the microphone level is at an optimum...

Page 15: ...e using the Loop Output section see page 11 When in the Loop Trim section adjustments are made in 1dB steps The measured loop output current is displayed in amps RMS accurate for sine signals Adjustments Enter Adjustment Mode to alter Loop B Trim relative to Loop A To increase the Loop B Trim level rotate the control dial clockwise To decrease the Loop B Trim level rotate the control dial anti clo...

Page 16: ...pensation level enter Adjustment Mode To increase the high frequency compensation level rotate the control dial clockwise To decrease the high frequency compensation level rotate the control dial anti clockwise Press the control dial once to confirm the selection and return to the main menu To calculate the correct high frequency compensation level refer to page Hearing Loop Setup Step 1 Metal Los...

Page 17: ...ct hearing loop cables to the Loop Output connection s on the rear of the driver 2 Set up the FSM on a tripod to the following height inside the hearing loop dependent on the position of end users 1 2 metres 3 9 feet for seated user 1 7 metres 5 6 feet for standing users 3 Connect the TSG to the Line Input of the hearing loop driver 4 Set the TSG to the 1kHz setting 5 Set the FSM to the Third Octa...

Page 18: ...n 3dB of each other scroll to the Loop Trim B section of the hearing loop driver enter Adjustment Mode and adjust the loop output currents to 2ARMS e Confirm the FSM readings are now within 3dB of each other and note their values 12 Set the TSG to the 5kHz setting 13 Set the FSM to the Third Octave F 5000Hz setting 14 Take note of the value measured by the FSM in the previously measured positions ...

Page 19: ... 5dB as follows A RMS 0 0dB Peak 3dB Note there is no need to go higher than 0dB A RMS 4 Make a note of the current required to achieve the required field strength 5 Set the TSG to 1 6kHz 6 Confirm that the Clipping Status Light s remains unlit If so proceed to Step 3 Field Uniformity 7 If the Clipping Status Light s remains lit the hearing loop driver is clipping and the connected hearing loop is...

Page 20: ...nother position within the looped area and note the measured value 5 The difference measured in the second position should not be greater than 3dB of that measured in the first position Repeat steps 3 and 4 to create a suitable map of the looped area 6 Proceed to Step 4 Final Output Level Adjustment Step 4 Final Output Level Adjustment 1 Set up the FSM in the same position noted in Step 2 Output L...

Page 21: ... strength at 1kHz Current 2 0A 3 0A 4 0A 5 0A Cable Type Cable Length Round CSA 0 5mm 85m 56m 42m 34m 1mm 133m 89m 66m 53m 1 5mm 155m 103m 77m 62m 2 5mm 173m 115m 86m 69m Flat Width 10mm 101m 67m 50m 40m 12 5mm 192m 128m 96m 77m 25mm 255m 170m 127m 102m V7 Metric V7 Imperial Current 2 0A 3 0A 4 0A 5 0A Cable Type Cable Length Round AWG 18AWG 438ft 292ft 219ft 175ft 14AWG 593ft 395ft 296ft 237ft Fl...

Page 22: ...ven at 3A Using the 2 5mm cable will allow the 3A to be driven at 1 6kHz without clipping Current 2 0A 3 0A 4 0A 5 0A Cable Type Cable Length Round CSA 0 5mm 136m 68m 68m 54m 1mm 214m 107m 107m 85m 1 5mm 248m 124m 124m 99m 2 5mm 277m 138m 138m 110m Flat Width 10mm 163m 81m 81m 65m 12 5mm 308m 154m 154m 123m 25mm 408m 204m 204m 163m V12a Metric Current 2 0A 3 0A 4 0A 5 0A Cable Type Cable Length Ro...

Page 23: ... 2 Internal failure 1 Check input signal source 2 Incorrect hearing loop driver being used The loop output level indicates current is flowing but I hear nothing in the loop 1 Shorted feeder cable 2 Loop listener is not working or being used too far from loop 1 Check feeder cable although the hearing loop driver will usually refuse to tune to shorted feeder 2 Check listener and location The sound i...

Page 24: ...ector 5 08mm Euro block Audio system Frequency Response 80Hz to 6 5kHz Distortion THD N 1 40dB Full current both outputs driven AGC Peak detecting HF Comp 7 optimised stages Note 1 Z 1 4Ω 133uH 0 685Ω 1 6kHz Note 2 1 40dB distortion Display Control Display LED Backlit LCD display Control Single rotary control Fault Monitoring and Protection Main Display Open circuit loop DCR measurement Loop groun...

Page 25: ...io system Frequency Response 80Hz to 6 5kHz Distortion THD N 0 3 50 5dB Full current both outputs driven AGC Peak detecting HF Comp 7 optimised stages Note 1 Z 2 4Ω 212uH 1 096Ω 1 6kHz Note 2 1 40dB distortion Display Control Display LED Backlit LCD display Control Single rotary control Fault Monitoring and Protection Main Display Open circuit loop DCR measurement Loop ground fault Front Panel LED...

Page 26: ...t may cause undesired operation CAUTION Changes or modifications not expressly approved by Contacta Systems LTD or an authorised partner could void the user s authority to operate the equipment Correct disposal of this product This marking indicates that this product should not be disposed with other household waste throughout the EU To prevent possible harm to the environment or human health from...

Page 27: ...27 ...

Page 28: ...aler UK ROW 44 0 1732 223900 sales contacta co uk US Canada 1 616 392 3400 info contactainc com Contacta Systems Ltd Office 13 Dana Trading Estate Transfesa Road Paddock Wood Tonbridge TN12 6UT www contacta co uk ...

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