Contacta HLD9 User Manual

Contacta HLD9 User Manual

Hearing loop driver
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HLD9
Hearing Loop Driver
User Guide
April 2018
1

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Summary of Contents for Contacta HLD9

  • Page 1 HLD9 Hearing Loop Driver User Guide April 2018...
  • Page 2: Table Of Contents

    Controls Set-Up 14-19 Troubleshooting 20-21 Technical Specification Standards 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: Product Overview

    Product Overview Our HLD9 is a pioneering modular hearing loop driver for perimeter or phased array configurations, suitable for large area applications such as theatres, conference facilities, sports arenas, concert halls and auditoria. The HLD9 uses cutting edge switching converter technology to deliver high efficacy and high performance with low noise.
  • Page 4: Connections

    5. Input 2 (Line) - Balanced XLR or ¼” TRS jack to ohmically isolated input. 6. Expansion. CAUTION: For connection to other Contacta systems only. 7. Feature - External monitor & control, Contacta communications processor. CAUTION: This is not a telecommunications port. 8. NL4 Loop Output Connection.
  • Page 5: Connections

    Audio Connections: Mic & Line XLR connector Unbalanced TRS Jack Ring Sleeve SOURCE + (Signal) Phantom Power 1: Screen/Shield 2: + (Signal Hot) 3: - (Signal Cold) Line Unbalanced Mono TS Jack Unbalanced Mono TS Jack Sleeve Sleeve SOURCE SOURCE + (Signal) + (Signal) hot - (Signal) cold...
  • Page 6: Suitable Cable Lengths (Metric)

    s for Suitable Cable Lengths (Metric) The tables in this section show the metric maximum cable lengths for different maximum required currents. No clipping below 1.6kHz (IEC specifications): n and e 14) Example: river If an installed cable is 520m of 25mm flat single turn and the required current noted in Step 3 (7) of Set-Up (see page 14) is 5 amps or greater, the driver is clipping.
  • Page 7: Suitable Cable Lengths (Imperial)

    Suitable Cable Lengths (Imperial) The tables in this section show the imperial maximum cable lengths for different maximum required currents. No clipping below 1.6kHz (IEC specifications): Example: If an installed cable is 850 feet of 18AWG (round) single turn and the required current noted in Step 3 (7) of Set-Up (see page 14) is 5 amps or greater, the driver is clipping.
  • Page 8 No clipping below 5kHz (Pro): Example: If an installed cable is 268 feet of 18AWG (round) single turn and the required current noted in Step 3 (7) of Set-Up (see page 14) is 7 amps or greater, the driver is clipping. Single-Turn Loop Current Cable Type...
  • Page 9: Controls

    Controls Note: Before entering a driver mode or making any changes, a loop must be connected to the HLD9. Front Panel Overview: Shows MIC level Shows LINE level Shows DRIVE level Driver Modes: Normal Operation Mode – The driver is fully functional. However, the controls on the front do not change the driver operation.
  • Page 10 Engineers mode – In this mode there are additional items that can be adjusted, such as driver type, phantom power and high frequency compensation. contacta HLD9 You must first be in adjustment mode (see page 9). Then, to enter the LINE...
  • Page 11 Driver Operation Selection (PAGE 1) PAGE 1 allows you to select the driver operation; either PERIMETER, PRIMARY or SECONDARY. Always select the driver operation mode before installing the driver in its rack mount bracket. contacta HLD9 LINE DRIVE CLIP CLIP...
  • Page 12 High Frequency Compensation (PAGE 2) PAGE 2 settings are for the high frequency compensation which is required to compensate for loss of high frequencies due to the presence of metal within the proximity of the loop. contacta HLD9 LINE DRIVE CLIP...
  • Page 13 Firmware Revision Indication (PAGE 4) THIS MODE IS DISPLAY ONLY: NO SETUP CAN BE CHANGED. contacta HLD9 LINE DRIVE CLIP CLIP PERIMETER STATUS ACTIVE ACTIVE PRIMARY PHTM LOW SIG SECONDARY POWER PAGE 4 firmware PAGE 4 is identified by When you are ready to move...
  • Page 14: Set-Up

    Set-Up To ensure optimal performance of an HLD9 hearing loop driver, set-up should be performed in following order: Step 1: Background Noise Level (see page 15) Step 2: Metal Loss (see pages 15-16) Step 3: Output Level and Clipping (see page 16-17)
  • Page 15 Step 1: Background Noise Level This test should be performed prior to loop installation. Set up the FSM, ensuring that the two vertical arrows in the top-right corner of the device are placed at the correct height: • 1.2 metres (3’ 9”) for seated user. •...
  • Page 16 3. Set the TSG to the 1kHz setting. 4. Set the FSM to the Third Octave F= 1000Hz setting. 5. Adjust the line level until the only the first orange LED is turned on. 6. Adjust the drive level to achieve 2 amps of output current, as indicated by the driver LEDs.
  • Page 17 5. Use the Suitable Cable Lengths guide (see pages 6 to 8) to confirm the installed cable length is less than the value for the current that was recorded in Step 3: Output Level and Clipping (4). 6. If the cable length does not exceed the value recorded in Step 3: Output Level and Clipping (4), move on to Step 4: Field Uniformity.
  • Page 18 Step 5: Final Output Level Adjustment Disconnect the TSG. 2. Adjust the output current to the level recorded in Step 3: Output Level and Clipping (4) on page 16 by pressing the DRIVE + or – buttons; each button press alters the current by 1dB. Example: If the measured field strength on the FSM is (A-RMS) -6dB (i.e.
  • Page 19 Note 1: When adjusting the output current, if a level of 5 amps is reached and yet the field strength is still below -6dB, the correct field strength will not be achieved. This is caused by either an incorrect loop design or installation, more metal loss than expected or an incorrectly specified driver.
  • Page 20: Troubleshooting

    Troubleshooting Symptom Possible Fault Action I’ve adjusted the HF comp 1) The driver is working close 1) Check loop characteristics. and see no change. to maximum output so there is If response OK at 1 amp, the not enough headroom for the headroom is inadequate.
  • Page 21 1) Reduce input level setting. up too high for signal level at input jack. 2) Input signal is distorted. 2) Check signal source. HLD = Hearing Loop Driver. If no action is successful please seek assistance from your distributor or a Contacta installer.
  • Page 22: Technical Specification

    Weight 3.8lbs Construction/Finish Front & Rear: Mild Steel / Top & Bottom: Aluminium Powder Coated Black Continual improvement policy Contacta has a policy of continual improvement for its products. This means that designs and specifications are subject to change without notice.
  • Page 23: Standards

    (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that 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.
  • Page 24 Local dealer: UK & ROW US & Canada +44 (0) 1732 223900 +1 616 392 3400 sales@contacta.co.uk 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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