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NEMS operating manual

bhi Ltd

P.O. Box 318

Burgess Hill

West Sussex

RH15 9NR

tel: +44 (0)845 217 9926

fax: +44 (0)845 217 9936

[email protected]

www.bhi-ltd.co.uk

bhi

bhi

bhi

bhi

bhi

Sound

Engin

ee

ring

Solu

tions

DSP Noise Cancellation

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Summary of Contents for NEMS

Page 1: ...Page 1 NEMS operating manual Noise Eliminating Marine Speaker 1077 102D Issue A bhi bhi bhi bhi bhi Operation and Installation Manual NEMS...

Page 2: ...ws with all rights reserved Neither this manual nor any of the material within may be copied or reproduced without the written consent of bhi Ltd Disclaimer The information in this document is subject...

Page 3: ...2 4 Power connection 10 3 Operation 3 1 Setup and operation 11 4 Specification 4 1 Specifications 12 5 Troubleshooting 5 1 Troubleshooting guide 13 6 Other bhi products 6 1 NES10 2 dsp speaker 14 6 2...

Page 4: ...se cancelling products and other specialist electronics 1 2 Introduction The bhi NEMS Noise Eliminating Marine Speaker greatly improves the clarity and intelligibility of speech in radio communication...

Page 5: ...e and interference are then attenuated to leave only the speech The following diagrams are taken from actual audio signals and illustrate how the audio signal is being processed Figure 1 Audio signal...

Page 6: ...packing Check that the following items are included in the package NEMS Speaker complete with mounting bracket Audio lead Customer feedback card Please report any missing items or damage to your suppl...

Page 7: ...1 Overview The following diagrams show the main components of the NEMS noise cancelling loudspeaker Noise cancelling power on off switch Fused power lead Audio connections beneath cover Bracket lockin...

Page 8: ...in figure 5 Audio connections cover removed Fused power lead Mounting bracket Figure 4 NEMS rear view 2 2 NEMS mounting The NEMS needs to be mounted so that it can be connected to a 12 18Vdc power so...

Page 9: ...n in the above diagram Ensure that the blade of the connector is clamping the exposed strands of the wire and not the insulation Push the cover over the connections Run the audio cable to the radio En...

Page 10: ...e cable with the white stripe is the positive lead Connect the cable to the power supply If the power lead is shortened ensure the fuse holder is still connected Figure 6 Connection overview 2 Install...

Page 11: ...r a short delay as the DSP adapts to the noise present on the audio signal Turn the switch off and the noise will return If the NEMS doesn t operate as expected the please turn to section 5 troublesho...

Page 12: ...d S ym b o l P aram eter Test C o n d itio n s M in Typ M ax U n its V s S upply voltage 12 16 18 V P o Output power d 10 f 1K Hz 12V 1 7 16V 18V 3 17 V s W B F requency response 3dB P o 1W RL 8W 50 4...

Page 13: ...o Audio No Yes Check audio connections Switch Radio on Switch on NEMS Power LED on Check power Connection No Switch NEMS off Can Audio be heard now Radio switched on Audio Now Finish Faulty No Yes No...

Page 14: ...y control Noise cancellation On Off switch LED indication of power and noise cancellation 12 24VDC operation On Off audio bypass switch Greatly improved signal to noise ratio Easy to install with adju...

Page 15: ...NEIM1031 Fitted with a 3 5mm mono jack plug 1031 STAND Clear Acrylic stand to mount the NEIM1031 The NEIM1031 can be used horizontally or ver tically DSP module range NEDSP1061 PCB Low signal level m...

Page 16: ...t ADP P003 3 5mm stereo plug 3 5mm mono socket ADP P004 Phono plug 3 5mm mono socket ADP P005 2 5mm mono plug 3 5mm mono socket ADP P006 2 5mm stereo plug 3 5mm mono socket ADP P007 6 35mm stereo plug...

Page 17: ...another room The headphones are supplied with an aircraft adapter so you can now listen to the film or CD player without all the jet engine noise Also supplied with carry bag BBRP Banner Badge Applica...

Page 18: ...Page 18 NEMS operating manual Notes...

Page 19: ...Page 19 NEMS operating manual Notes...

Page 20: ...ting manual bhi Ltd P O Box 318 Burgess Hill West Sussex RH15 9NR tel 44 0 845 217 9926 fax 44 0 845 217 9936 sales bhi ltd co uk www bhi ltd co uk bhi bhi bhi bhi bhi Sound Engineering Solutions DSP...

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