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HLD9

User Guide

April 2018

Hearing Loop Driver

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Summary of Contents for HLD9

Page 1: ...1 HLD9 User Guide April 2018 Hearing Loop Driver ...

Page 2: ...rols Set Up Troubleshooting Technical Specification Standards 3 3 4 5 6 7 8 9 14 19 20 21 22 23 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: ...nd high performance with low noise Components 1 2 3 4 5 1 Compliance Certificate 2 User Guide 3 Hearing Loop Stickers x 2 4 Rubber Feet x 4 5 Hearing Loop Driver HLD9 6 IEC Power Lead Cable Equipment 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 Plug type varies by cou...

Page 4: ...or several months or more Rear Panel Connections Connections 1 2 3 4 5 6 7 8 HLD9 ETL rear panel text shown All connections are the same on the standard HLD9 2 External Port Status Indicator Volt free relay contacts 3 Phantom power indication for microphone 4 Input 1 Microphone Balanced XLR with switchable 12VDC phantom power or unbalanced TRS jack for electret microphone with 5VDC power via 680Ω ...

Page 5: ...leeve SOURCE Signal GND Line Unbalanced Mono TS Jack Tip Sleeve SOURCE Signal hot Signal cold Phantom Power CAUTION Route loop output cables as far away as possible from the driver audio input cables Connect a twisted pair or quad core loop feeder cables to the supplied NL4 connector diagram below Insert into the NL4 Loop Output Connection on the rear of the driver Loop Connections ...

Page 6: ...ent maximum required currents No clipping below 1 6kHz IEC specifications Example 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 Suitable Cable Lengths Metric Current 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A Cable Type Cable Length Maximum Cable Length Round Cable CSA 1mm2 959m 479m 320m 240m...

Page 7: ...able AWG 18AWG 2971ft 1485ft 990ft 743ft 594ft 495ft 424ft 371ft 330ft 297ft 14AWG 3395ft 1697ft 1132ft 849ft 679ft 566ft 485ft 424ft 377ft 339ft Flat Cable Width 18AWG equivalent 3592ft 1796ft 1197ft 898ft 718ft 599ft 513ft 449ft 399ft 359ft 14AWG equivalent 4713ft 2356ft 1571ft 1178ft 943ft 785ft 673ft 589ft 524ft 471ft The tables in this section show the imperial maximum cable lengths for diffe...

Page 8: ...621ft 466ft 373ft 311ft 266ft 233ft 207ft 186ft Flat Cable Width 18AWG equivalent 2290ft 1145ft 763ft 572ft 458ft 382ft 327ft 286ft 254ft 229ft 14AWG equivalent 2638ft 1319ft 879ft 660ft 528ft 440ft 377ft 330ft 293ft 264ft Current 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A Cable Type Cable Length Maximum Cable Length Round Cable AWG 18AWG 1097ft 549ft 366ft 274ft 219ft 183ft 157ft 137ft 122ft 110ft 14AWG 1115...

Page 9: ...VE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 To enter adjustment mode press both MIC and simultaneously In adjustment mode the STATUS LED will flash Front Panel Overview Pressing the MIC or will adjust the MIC input gain adjustments are in 1dB steps LEDs show the MIC s level after fader Pressing the LINE or will adjust the LINE input gain adjustments are in 1dB steps LEDs show the LIN...

Page 10: ...LOW SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 Press both Line and simultaneously to enter the Engineers mode CLIP ACTIVE PHTM CLIP ACTIVE LOW SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 CLIP ACTIVE PHTM CLIP ACTIVE LOW SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 There ...

Page 11: ...SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 CLIP ACTIVE PHTM CLIP ACTIVE LOW SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 CLIP ACTIVE PHTM CLIP ACTIVE LOW SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 CLIP ACTIVE PHTM CLIP ACTIVE LOW SIG MIC LINE PERIMETER PRIMARY SECONDARY...

Page 12: ...g the LINE or buttons There are 6dB of HF compensation adjustment possible When you are ready to move onto the next PAGE press the DRIVE button Microphone Phantom Power PAGE 3 PAGE 3 settings are for the microphone phantom power selection CLIP ACTIVE PHTM CLIP ACTIVE LOW SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 PAGE 3 is identified by LED 3 flashing Th...

Page 13: ...he next PAGE press the DRIVE button Restore to Factory Settings PAGE 5 PAGE 5 is for restoring settings CLIP ACTIVE PHTM CLIP ACTIVE LOW SIG STATUS POWER MIC LINE DRIVE PERIMETER PRIMARY SECONDARY 2 5 5 7 5 10 contacta HLD9 PAGE 5 is identified by LED 5 flashing Press the LINE and LINE button simultaneously To go back to PAGE 1 press the DRIVE button To exit Engineers mode press the DRIVE button C...

Page 14: ...lipping see page 16 17 Step 4 Field Uniformity see page 17 Step 5 Final Output Level Adjustment see page 18 Step 6 Input Signal Level Adjustment see page 18 Set Up Required for Set Up Note Throughout set up record values on the provided Compliance Certificate document whenever you see the following icon The Compliance Certificate document confirms compliance with IEC 60118 4 if your values are wit...

Page 15: ...9 for seated user 1 7 metres 5 6 for standing users A tripod or similar for mounting the FSM is recommended 2 Any lights or equipment normally active in the surrounding area should be turned on to ensure an accurate testing environment 3 Set the FSM to the Background Noise mode A weighted 4 Measure and note the background noise level throughout the looped area on the Compliance Certificate documen...

Page 16: ... to metal loss 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 7 Set the TSG to the pink noise setting and record the value measured by the FSM 8 Set the FSM to the Third Octave F 100Hz setting and...

Page 17: ...urrent 2 Reduce the length of the loop 3 Use a higher diameter of cable or flat copper tape 4 Try a two turn loop 5 Use a higher voltage driver Step 4 Field Uniformity 1 Set up the FSM Ensure that the two vertical arrows in the top right corner of the FSM are placed at the correct height 1 2 metres 3 9 for seated user 1 7 metres 5 6 for standing users A tripod or similar for mounting the FSM is re...

Page 18: ... button press alters the current by 1dB Example If the measured field strength on the FSM is A RMS 6dB i e 6 presses of the button extra current will be required to achieve 0dB indicated on Note 1 Step 6 Input Signal Level Adjustment 1 Connect the system signal source 2 Adjust the input level line mic level until the last green or first orange LED is lit on audio peaks 3 The system is now set up ...

Page 19: ...5 02A 8 9 00dB 5 64A 9 10 00dB 6 32A 10 11 00dB 7 10A 11 12 00dB 7 96A 12 13 00dB 8 93A 13 14 00dB 10 02A 14 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 ...

Page 20: ...e 2 Internal self test failure 1 Check loop and connections try known good loop 2 Check loop DC resistance with an ohm meter 0 33 ohms minimum The power light doesn t come on 1 Mains power absent 2 Internal failure 1 Check mains power 2 Seek assistance I can t get my driver out of adjustment mode 1 Button presses not coinciding 2 Internal failure 1 Press both buttons together to exit mode 2 As a l...

Page 21: ...e HLD input level setting The Drive level indicates current is flowing but I hear nothing in the loop 1 Shorted feeder cable unlikely 2 Loop listener not working or being used away from loop 1 Check feeder cable although the HLD will usually refuse to tune to shorted feeder 2 Check listener and location The sound is very distorted 1 Input level has been turned up too high for signal level at input...

Page 22: ...00 Hz 5kHz 3dB loop dependant Distortion Better than 51dB inputs at nominal level Expansion Contacta interconnect Input or output to or from additional Contacta products with 90º phase shift selectable Status Volt free relay contacts SPCO Feature External monitor control Contacta communications processor interface Displays Microphone level 8 level bar graph with peak hold 6dB steps Line level 8 le...

Page 23: ...pt 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 Correct disposal of this product This marking indicates that this product should not be disposed with other household waste throughout the EU To preven...

Page 24: ...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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