BHI NES10-2 Operating Manual

पीडीएफ

दस्तावेज़

Page 32 bhi bhi Ltd

PO Box 136

Bexhill on Sea

East Sussex

TN39 3WD

www.bhi-ltd.co.uk

www.wonderwand.co.uk

www.bannerbadges.co.uk

Tel:+44 (0)870 2407258

Fax:+44 (0)870 2407259

1030-103D Issue F 02/04 bhi

NES10-2

NES-5

Noise Eliminating Speakers

Operating Manual

Page 1

Note:

No user serviceable parts inside. Warrany void if speaker opened.

When listening using headphones, care must be taken when switching the noise cancellation off, as high volumes of noise will be present.

Prolonged exposure to high sound levels may lead to hearing damage.

bhi accept no responsibility to damage to hearing through incorrect operation of this equipment.

7. Approvals

European conformity information

· A sample of this product has been tested and found to conform to the following European Directives:

73/23/EEC – Low Voltage (safety) Directive

89/336/EEC – EMC Directive

Page 2 Page 31

6. bhi support

Every noise-eliminating speaker comes with a 12 month guarantee against defective materials and workmanship.

If you do have a problem then please refer to the troubleshooting section 4. If you have not resolved your problem then please contact us.

Before you make your call please have the following to hand:

√

Your serial number (found at the back of the speaker)

√

Details of when and where you purchased the noise eliminating speaker

√

Your address

Most queries can be sorted out over the telephone, if not we will arrange with you to have your speaker sent back to us for analysis, repair or replacement (if within

12 months from date of purchase, if outside the guarantee period an estimate of the cost of repair will be given).

For contact details please refer to back cover of this manual.

If you have any suggestions for improvements please compete and return the customer feedback form.

Page 30

Important Information

Copyright

This publication, including all photographs and illustrations is protected under international copyright laws, 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 to change without notice. bhi Ltd makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore, bhi Ltd reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of bhi Ltd to notify any person of such revision or changes.

Page 3

1 Overview

1.1

1.2

1.3

1.4

bhi

Introduction

Audio DSP Noise cancellation

Unpacking

Page

2 NES10-2

2.1

2.2

2.3

2.4

2.5

Controls

Description

Specification

Connection

Setup

3. NES-5

3.1

3.2

3.3

3.4

Connections

Description

Specification

Setup

4.Troubleshooting

5. Accessories

6. bhi Support

7. Approvals

Page 4

Wonder Wand

Order code:WWAND

Rig mounted QRP antenna providing near all band coverage from 40M to 70cm

Tuneable Counter poise

Order code:TCS

Tuneable counter poise for use with Wonder Wand and other

QRP antennas.

Mini-Paddle

Order code: MP-817

Small sized twin paddle to be used with the FT-817 and all other transceivers that have

The Code Cube:

Order code: Code Cube

Mini-Paddle and Code Cube

Keyer = World’s smallest Keyer/

Paddle.

built in keyer circuits.

FT-817 Mounting stand.

Order code: FT-Stand

Simply clicks into position.

Adjustable with non slip feet.

Pocket Reference Books

Have all the important information at your finger tips. Available for the following Yaesu FT-

817,VX-5R and VX-7R

Page 29

Noise Cancelling Headphones (NOT DSP)

Order code:NCH

These active noise reduction (ANR) headphones reduce the ambient background noise to allow you to listen to the program source peacefully.

The headphones employ microphones to monitor the ambient noise. These microphones are wired out of phase and feed a differential amplifier which generates an opposing signal to that of the unwanted noise. This signal then cancels out the unwanted background noise.

The headphones effectively remove noise such as blower noise, ambient noise, jet engine noise or music from another room.

Free aircraft adapter and carry bag

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.

Page 28

Features:

§ Lightweight, folding design thats ideal for travelling.

§ Ambient noise cancelling on/ off switch with LED

§ Warning sirens and telephone rings remain unaffected.

§ Discrete battery holder AAA size. (Battery included)

§ 30mm Neodymium drivers

§ Supplied with carry pouch

§ 1.6M cable terminating in a

3.5mm jack plug plus 2 pin aircraft adapter.

1. Overview

1.1

bhi bhi Ltd are specialists in the design, development and manufacture of Digital Signal Processing (DSP) noise cancelling products and other specialist electronics.

1.2

Introduction

The bhi noise eliminating speakers greatly improve the clarity and intelligibility of speech in radio communications. They are suitable for use in many applications where high background noise and interference mean that you cannot clearly hear what is being said. The

NES10-2 and NES-5 enable the user to listen and concentrate “stress-free”.

Suitable applications where the speakers will be of great benefit to the user include radio amateur base stations, CB radios, two-way radios, HF radios, marine communications, scanners, taxi base stations and hands-free car kits.

The NES10-2 and NES-5 are compact and easy to install. They incorporate DSP technology and are fully adaptive to any change in noise levels and interference.

On the NES10-2 the noise cancelling can be switched on or off and there are 8 user selectable noise cancellation levels, whilst the NES-5 is a plug and go model which has a fixed level of noise cancellation.

Page 5

The speakers mount like any standard external speaker and are powered by any 12 – 24 vdc unregulated power source. You can use the optional bhi external power supply or in-vehicle adapter.

The NES10-2 and NES-5 come as standard with a

2m audio lead terminated with a 3.5mm mono jack plug ready for immediate use.

1.3

Audio DSP Noise cancellation.

The bhi DSP processes the incoming audio signal and then differentiates the speech from the noise. The unwanted noise 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.

Speech Noise

Original signal.

Speech with a lot of background noise

Figure 1. Audio signal before processing.

Page 6

Yaesu FT817

Complete kit to fit in the Yaesu FT817.

Order code:

NEDSP1061-KBD-

FT817

Kenwood TS50

Complete kit to fit in the Kenwood TS50.

Order code:

NEDSP1061-KBD-

TS50

Generic

Complete generic kit to fit most applications.

Order code:

NEDSP1061-KBD

New versions available soon. Check our website for the latest, or call for details.

NEDSP1062 Amplified DSP modules.

These are as the NEDSP1061 modules, except they feature an integral 2.5W rms power amplifier. They are ideally suited for fitting in the loudspeaker path of equipment, or indeed into a loudspeaker. They feature single button operation with selectable 4 or 8 levels of noise reduction.

Order code NEDSP1062-KBD

Headphones and Earpieces

Stereo Headphones

Order code: 1030-STHDP

Lightweight stereo headphones. Supplied with

3.5mm mono - 3.5mm stereo adapter.

Mono Earpiece

Order code:1030-MOEP

Mono earpiece fitted with

3.5mm mono plug.

Page 27

Switch Box

Order code: 1042 Switch Box

Need to Connect more than one piece of equipment to your bhi Noise Eliminating Speaker or module?

Switch box front view Switch box rear view n n

Features: n Allows 6 pieces of equipment to be connected to a Noise Eliminating Speaker,

In-line Module or existing extension speaker

3 Inputs - loaded at 8 ohms

3 Un-loaded inputs (for low level signals)

NEDSP1061 modules

The NEDSP1061 modules again feature the bhi noise reduction DSP. It’s small size allows it to be retro fitted into existing equipment, or designed in to new equipment.

The module is single button operation.

It features visual and audible indication of mode of operation.

The module can be software settable to 4 or 8 levels of noise reduction. Four wires are provided to integrate the module into the equipment. The fitting kit includes a mounting bracket, keyboard label and a detailed installation manual.

Currently there are three versions of the module.

Page 26

Processed speech.

Speech with reduced noise

Figure 2. Audio signal after processing.

1.4

Unpacking

Check that the following items are included in the package:

NES-5 Noise eliminating speaker or

NES10-2 Noise eliminating speaker

2 fixing screws

4 self adhesive rubber feet

1 fused power lead

Customer feedback card

Optional extras if ordered (see section 5):

For NES10-2 turn to page 8

For NES-5 turn to page 15

Page 7

2. NES10-2

2.1 Controls

Noise Cancellation Selection Table

NES10-2 Noise Eliminating Speaker bhi

PO Box 136

Bexhill on Sea

East Sussex

TN39 3WD

England

Tel: + 44 (0)8702407258

Serial No.

Off

Filter

Select

SW1 SW2 SW3 Level

On On On 1

On On Off 2

On Off On 3

On Off Off 4

Off On On 5

Off On Off 6

Off Off On 7

Off Off Off 8

DC Power

12-24V DC

Audio Input

Lead

Power/Audio

Bypass

DC Power in Socket centre pin +Ve

DIP Switch

Sensitivity

Control

LED

Noise Cancellation

On/Off Switch

Headphone socket

Volume

Figure 3. NES10-2 Controls

Page 8

Off On

Noise Cancellation

Other products avaialble from bhi.

In-line module.

Order code: NEIM1031

The NEIM1031 In-line module uses the same DSP technology found in the NES10-2 and NES5 speakers, but has the following additional features:

§ Noise cancellation 9 - 35dB

§ Audio input/output

Line level input/output

§ Output volume control

§ Input level control with LED

Power on/off with LED

§ Input selector switch

§ Noise cancellation On/off with LED

Accessories for the NEIM1031

Horizontal conversion label

Order code:1031-108D

This label changes the orientation of the NEIM1031 to landscape

20 Watt Extension speaker

Order code:LSPKR

Teminated with 3.5mm

mono plug

NEIM1031 mounting Stand.

Order code: 1031-STA

A fully adjustable stand for the

NEIM1031.Holds the module in the optimum postion.

Page 25

Adaptors for connecting NES10-2 to equipment

R a d i o c o n n e c t o r

6 .

3 5 m m m o n o s o

( c

1 / 4 k e t

" )

6 .

3 5 m m ( 1 / 4 " )

S t e r e o s o c k e t

3 .

5 m m J a c k

S t e r e o s o c k e t

3 .

5 m m J a c k

M o n o s o c k e t

P h o n o s o c k e t

2 .

5 m m m o n o s o c k e t

2 .

5 m m S t e r e o s o c k e t

6 .

3 5 m m m o n o p l u g 3 .

5 m m m o n o s o c k e t

6 .

3 5 m m S t e r e o p l u g 3 .

5 m m m o n o s o c k e t

3 .

5 m m S t e r e o p l u g 3 .

5 m m m o n o s o c k e t

N o n e p h o n o p l u g 3 .

5 m m m o n o s o c k e t

2 .

( u m m m m s e i n m o

S t c o e n o r e o n j u n

A p l d u g a p l u g c t i o n p

t o r r e q

3 .

5 m m u

3 .

5 m m w i t h A D P i r e d m o n o

s t e

P 0 r e o s o c k e

0 3 ) t s o c k e t

O r d e r N u m b e r

A D P P 0 0 1

A D P P 0 0 2

A D P P 0 0 3

N / A

A D P P 0 0 4

A D P P 0 0 5

A D P P 0 0 6

Adaptors for connecting ear/headphones to

NES10-2

O r d e r n u m b e r H e a d p h o n e c o n n e c t o r

3 .

5 m m j a c k m o n o p l u g

3 .

5 m m J a c k

S t e r e o p l u g

6 .

3 5 m m

M o n o

( 1 p l u g

/ 4 " )

6 .

3 5 m m

S t e r e o p

( 1 l u g

/ 4 " )

2 .

5 m m p l u g

S t e r e o

2 .

5 m m m o n o p l u g

N o n e

A d a p t o r r e q u i r e d

3 .

5 m m s t e r e o s o c k e t 3 .

5 m m m o n o p l u g

6 .

3 5 m m m o n o s o c k e t 3 .

5 m m m o n o p l u g

6 .

3 5 m m s t e r e o s o c k e t 3 .

5 m m m o n o p l u g

2 .

5 m m S t e r e o s o c k e t 3 .

5 m m m o n o p l u g

2 .

5 m m m o n o s o c k e t 3 .

5 m m m o n o p l u g

N / A

A D P S 0 0 1

A D P S 0 0 2

A D P S 0 0 3

A D P S 0 0 4

A D P S 0 0 5

Page 24

2.2

Description

The noise cancellation level DIP switch allows the user to select one 1 of 8 different settings, level 1 giving the least amount of noise cancellation, level 8 providing the most. The unit is factory set to level 6.

DIP switch settings are shown on the rear of the speaker (sse page 14 for more information).

The power-in socket allows the user to connect NES10-2 to the bhi power supply (optional extra) or any suitable 12 –24V dc power source

(min 500mA), with a suitable 2.1mm power connector, centre pin positive (fused at 3A).

2 metre audio input lead terminated with a

3.5mm mono jack plug. This lead connects to the external speaker socket or earphone socket of your equipment.

Sensitivity control . This controls the input level to the electronics of the NES10-2, and is adjusted depending on the input level from the radio communication equipment being used.

The optimum level is a combination of the output from the equipment and the sensitivity level of the NES10-2, so that there is no distortion and the speaker is not being overdriven.

Page 9

Once set the controls do not normally require any further adjustments.

LED indicator. The LED illuminates red when power is applied and changes to green when the noise cancellation is active.

L E D

C o l o u r

O f f

D e s c r i p t i o n

P o w e r a u d i o o f f b y p a s s e d

R e d

P o w e r

N o i s e o n c a n c e ll a t i o n o f f

G r e e n

P o w e r

N o i s e o n c a n c e ll a t i o n o n

Noise cancellation ON/OFF switch. This switch turns the noise cancellation on and off, and should be in the “OFF” position prior to using the speaker.

Power switch/audio bypass.

This switch removes the power to the speaker .

By turning the power off, the audio bypasses the DSP circuit, and is connected directly to the speaker. The speaker will then act as a normal extension speaker

Page 10

Headphone socket. This allows the user to listen in private using a standard mono earpiece or stereo headphones using one of the optional audio adaptors (see section 5) . This socket can also drive another loudspeaker. When a connector is inserted into this socket the internal speaker is muted.

5. Accessories

Optional Extras

The following items are available from bhi as optional extras. If you would like to order any of these items then please contact us ( see the back page of this document for contact details), or order on-line at www.bhi-ltd.co.uk.

Power:

1030-UKPA

1030-EUPA

1030-VEPL

1030-2WVA

Audio:

1030-EXLE

ALD-001

UK mains power adapter

European mains power adaptor

Vehicle power adapter

2 Way vehicle power adaptor

ALD-002

ALD-003

ALD-004

Audio Extension lead (2M)

3.5mm - 3.5 mm mono audio lead

1.2M long.

3.5mm - 3.5mm mono audio lead

2.5M long.

Phono - phono lead mono lead

1.2M long.

3.5mm Stereo - 2 x phono lead

1.2M long.

Audio Adaptors:

See tables on following page for details.

Page 23

What is the fourth DIP switch for?

Nothing, it is reserved for future expansion.

What adjustments do I need to make during use?

None. Once the NES10-2 is set to your personal settings no further adjustments should be necessary.

Can the speakers be used with a switch mode power supply?

No. The speakers shouldbe used with linear suppplies.

Sometimes I can hear watery noises.

When listening to high levels of noise, on high levels of processing the background may sound a little strange.

This is normal operation as the DSP is removing the high levels of noise.

See FAQs on our website for further information.

Page 22

2.3

Specification

Noise attenuation - 9 - 35dB

Number of attenuation levels - 8

Tone reduction - 4 -65dB

Audio input power

Audio output power

Audio connection

- 5W rms max

- 2.5W rms max

- 3.5mm mono jack

Headphone connection

plug, 2m lead.

-3.5mm mono jack

socket

DC power

Size

Weight

- 12-24V dc. 500mA

- 110 x 65 x 55mm

- 200gms

2.4

NES10-2 basic connection diagram

For use with standard radio communication equipment, follow the diagrams and procedures on page 12. For in vehicle use, fit the speaker in a suitable location using the bracket and fixing screws supplied. Ensure the bracket does not foul the power switch.

Note: It is recommended that this is carried out by a qualified vehicle technician.

Also supplied are four rubber feet. These can be attached to the bottom of the mounting plate to prevent it from marking surfaces.

Page 11

14.2000 000 14.195.00

145.0

For adaptors see section 5

NES10-2 Noise Eliminating Speaker bhi

PO Box 136

Bexhill on Sea

East Sussex

TN39 3WD

England

Tel: + 44 (0)8702407258

SW1 SW2 SW3 Level

Off

Filter

Select

On On On 1

On On Off 2

On Off On 3

On Off Off 4

Off On On 5

Off On Off 6

Off Off On 7

DC Power

12-24V DC

Serial No.

Off Off Off 8

Audio Input

Rubber feet x 4

Optional In-vehicle power lead

Fixing Screws x2

2.1mm power connector centre +Ve

Optional Mains

Power Adaptor

Figure 4. NES10-2 connections

Page 12

Try transmitting again. If the problem persists , then move onto the next step.

If the problem is cured, try removing the first ferrite.

Figure 8. Power lead suppression.

Try transmitting again. If the problem persists , then move to the next step.

If the problem is cured, try removing the previous ferrite(s). Shortening the power lead may also improve the situation.

Fit another ferrite at the other end of the power lead

Figure 9. Additional power lead suppression.

Try transmitting again, if the problem is cured, try removing the previous ferrite(s).

Page 21

Operators voice can be heard when transmitting.

All bhi products operate correctly under normal working conditions. However if problems with feedback are experienced during transmisison then the following measures may help.

Reduce the sensitivity control (NES10-2 only)

Connect the speaker to a separate power supply (available from bhi - see section 5).

Ferrites

Wind as many turns as possible around the ferrite

Audio Lead 1” (25mm) ferrite ring

Figure 6. Audio lead

If problem persist then fit another ferrite at the other end of the lead close to the audio connector

Page 20

Figure 7. Audio lead

2.5

NES10-2 basic set-up procedure and operation

Connect the bhi power supply or a suitable 12 to 24

Vdc power supply to the power socket at the back of the NES10-2.

Note: Make sure the centre pole of your power supply connector is connected to positive (+ve).

Switch the power switch on.

Switch the noise-cancelling switch off. The front panel LED should be illuminated red.

Turn the sensitivity control fully anticlockwise, and then back a quarter of a turn.

Connect the audio lead to your external speaker socket using the 2m audio lead with 3.5mm jack plug. If your external speaker socket is not a 3.5mm

jack socket, then audio lead adapters are available from bhi. A 2 metre audio extension lead is available if your equipment is more than 2m away from the NES10-2. (see section 5)

Set the noise cancellation level DIP switch to level

6 to start with using the table on the following page or on the label on the rear of the speaker for the correct switch setting. Note: Switch 4 is NOT used.

Page 13

S W 1

O N

O F F

S W 2

O N

O F F

O N

O F F

S W 3

O N

O F F

O N

O F F

O N

O F F

O N

O F F

L e v e l A t t e n u a t i o n

1 9 d B

5 d d d d d d d

Note:

The switches may be adjusted using a blunt implement such as ballpoint pen.

Turn the radio equipment on and set the audio volume to your own personal taste, making sure that you are not over driving the speaker and causing distortion. Adjust the sensitivity control knob on the top of the speaker if required to obtain your optimum setting.

Tune into the station or channel you require.

Turn the noise cancelling on, the front panel LED changes from red to green indicating the noise cancellation is active.

Adjust the filter level setting if required to remove higher levels of noise and improve the intelligibility and clarity of the signal.

Page 14 n

With the noise cancellation switch in the off position, make sure that you have the sensitivity control on the NES10-2 fully counter clockwise or thereabouts.

Now tune your radio communications equipment until you have a good clear signal with good volume.

The volume from the speaker is low and cannot be increased: n

The speakers are designed to work with the external speaker sockets of radio communications equipment, and although it will work with some earphone and headphone sockets, there may be occasions where the signal output from these types of output sockets is not enough for the speakers electronics to process the signal effectively.

bhi have another product that will work with these levels of signal , the NEIM1031 (Noise eliminating

In-line Module). Please contact bhi for more information. See end of operating manual for contact information.

Sometimes there is a short delay before the noise cancellation is active.

This is due to the time the DSP takes to start processing the signals. This gives the oppportunity to check that the DSP is not taking out any detail from the signal.

Page 19

4. Troubleshooting/FAQs

Speaker doesn’t work at all, no sound from the speaker: n

Check that the power connector on your power supply is suitable for the power socket on the speaker

(2.1mm, centre positive).

Check that you have switched your radio communication equipment on and that you have a signal for the speaker to process. To verify this, remove the audio connector from the external speaker socket on your equipment.

Check that the LED on the front of the speaker is illuminated green, when the noise cancellation is on (NES10-2 only).

The speaker works but the noise cancellation doesn’t appear to improve the audio quality of the signal: n

Check that the LED on the front of the NES10-2 changes from red to green when the noise cancellation is switched off and on (NES10-2 only).

Now switch the noise cancellation on, you should clearly hear the difference now.

Page 18

3. NES-5

3.1 NES-5 Connections

3.5mm Jack plug

145.0

14.2000 000 14.195.00

For adaptors see section 5

Rubber feet x 4 Fixing Screws x2

Optional In-vehicle power lead

Optional Mains

Power Adaptor

Figure 5. NES-5 connection detail

Page 15

3.2

Description

The power-in socket allows the user to switch on the NES-5 by using the bhi power supply

(optional extra) or a suitable 12 –24V dc power source (min 500mA), with a suitable 2.1mm

power connector, centre pin positive (fused at

3A).

2 metre audio input lead terminated with a

3.5mm mono jack plug. This lead connects to the external speaker socket or earphone socket of your equipment.

3.3

Specification

Noise attenuation

Tone reduction

Audio input power

Audio output power

Audio connection

DC power

Size

Weight

- 20 dB

- 5W rms max

- 2.5W rms max

- 3.5mm mono jack

plug, 2m lead.

- 12-24V dc. 500mA

- 110 x 65 x 55mm

- 200gms

Page 16

3.4

NES-5 basic set-up procedure and operation

Connect the supplied in vehicle power lead, bhi power supply or a suitable power adaptor to the power socket at the back of the NES-5.

Note: Make sure the centre pole of your power supply connector is connected to the positive rail

(+ve).

Connect the audio lead to your external speaker socket using the 2m audio lead with 3.5mm jack plug. If your external speaker socket is not a 3.5mm

jack socket, then audio lead adapters are available from bhi (see section 4). A 2 metre audio extension lead is available, If your equipment is more than 2m away from the NES-5 (see section 5).

Switch on and the NES5 will automatically remove unwanted noise and interference.

Page 17

नमस्ते! मैं एक एआई चैटबॉट हूं जिसे विशेष रूप से BHI NES10-2 Operating Manual के साथ आपकी सहायता करने के लिए प्रशिक्षित किया गया है. मैंने दस्तावेज़ की अच्छी तरह से समीक्षा की है और आपको आवश्यक सटीक जानकारी का पता लगाने या स्पष्ट और सरल शब्दों में सामग्री को समझाने में मदद कर सकता हूं. चाहे आप विशिष्ट सुविधाओं, समस्या निवारण चरणों या सामान्य उपयोग पर मार्गदर्शन की तलाश कर रहे हों, अपने प्रश्न पूछने के लिए स्वतंत्र महसूस करें. आप अपनी चिंताओं या जरूरतों के बारे में जितनी अधिक जानकारी प्रदान करेंगे, उतनी ही सटीक और प्रभावी ढंग से मैं आपकी सहायता कर सकता हूं!