Page 1
bhi
NES10-2 MK3
NES-5
Noise Eliminating Speakers
Operating Manual
DSP Noise Cancelling products
1030-103D Issue H 04/10
Page 32
DSP Noise Cancelling products
bhi
email: sales@bhi-ltd.com
www.bhi-ltd.com
Tel:+44 (0)845 2179926
Fax:+44 (0)845 2179936
bhi Ltd
PO Box 318
Burgess Hill
West Sussex
RH15 9NR
England
Page 2
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.
Page 31
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
7. Approvals
Weee Statement for correct disposal of this product:
(Applicable in the European Union and other European countries with
separate collection systems). This marking shown on the product or its
literature, indicates that it should not be disposed of with other household wastes at the end of its working life. To prevent possible harm to
the environment or human health from uncontrolled waste disposal,
please separate this from other types of wastes and recycle it responsibly to promote the sustainable reuse of material resources. Household
users should contact either the retailer where they purchased this
product, or their local government ofce, for details of where and how
they can take this item for environmentally safe recycling. Business
users should contact their supplier and check the terms and conditions
of the purchase contract. This product should not be mixed with other
commercial wastes for disposal.
Page 3
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.
Important Information
Page 30
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 if applicable (not on all product. Some
speakers may be identied by a coloured sticker)
√ 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.
6. bhi support
If you have any suggestions for improvements please compete and
return the customer feedback form.
Page 4
1 Overview
1.1 bhi
1.2 Introduction
1.3 Audio DSP Noise cancellation
1.4 Unpacking
2 NES10-2 MK3
2.1 Controls
2.2 Description
2.3 Specication
2.4 Connection
2.5 Setup
3. NES-5
3.1 Connections
3.2 Description
3.3 Specication
3.4 Setup
4.Troubleshooting
5. Accessories
6. bhi Support
7. Approvals
Page
5
5
6
7
8
9
11
11
13
15
16
17
17
18
23
30
31
Table of Contents
Page 29
Pocket Reference Books
Have all the important information at your nger tips. Available
for the following
Yaesu:
FT-817
VX-2R
VX-5R
VX-6R
VX-7R
VX-8R
The Desk Top “Noise Away” is a stylish robust base station speaker for use
in radio communications, especially amateur radio, two-way radio and HF radio. It is
suitable for all bands and is easy to set up and control via the microprocessor controlled
pushbuttons on the front of the speaker grille.It comes with a mounting bracket that
can be left on or removed depending on personal choice.The unit is supplied with
a 1.2 metre audio cable with a moulded 3.5mm jack plug and banana plugs plus a
2.1mm fused DC power lead.
Features:
•Stylish quality matt black speaker
•Excellent audio quality
•4” base driver and a 1” tweeter unit
•2.5 Watt amplied DSP noise cancelling unit
•Wide audio input level 50 - 500mW
•Power 12 and 18 Volts (300mA)
•4 or 8 lter levels (selectable)
•Visual and audio indication of lter level
•Noise reduction 9 – 35dB
•Tone reduction 4 – 65 dB
•Weight 1.65Kg
•Dimensions 200(H) x 150(D) x 160(W)mm
Page 5
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 MK3 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 stati ons,
CB radios, two-way radios, HF radios, marine communications, scanners, taxi base stations and hands-free car kits.
The NES10-2 MK3 and NES-5 are compact and easy to
in s tall. Th ey in c orporate DSP techno l ogy an d are fully
adaptive to any change in noise levels and interference.
On the NES10-2 MK3 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 xed level of noise
cancellation.
1. Overview
Page 28
DSPKR
10 Watt RMS DSP noise cancelling speaker
10 Watts RMS audio output power
Fully Adaptive noise cancelling 9 - 24dB
7 user selectable noise cancelling levels
Simple pushbutton control of DSP functions
Audio level indicator to optimise lter function
Separate volume control
Filter level store function
Sleep mode to conserve battery power
Easy to install with adjustable mounting bracket
10 – 16Vdc operation
Auxillary output socket for headphones or loudspeaker
Up to 6 Watts input
Dims: 135(W) x 130(H) x 85 (D)mm
Weight 0.85Kg
Supplied with 1030-FPL fused DC power lead and user manual
The DSPKR is a new, quality,
amplied DSP noise cancellating
speaker from bhi that really lets you
hear that signal!
Works on all radio bands and is
easy to install.
Features:
Page 6
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 MK3 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.
Original signal.
Speech with a lot of
background noise
Speech Noise
Figure 1. Audio signal before processing.
Page 27
NEDSP1062 Amplied DSP
modules.
Amplied version of the low level audio
NEDSP1061 modules, except they feature
an integral 2.5W rms power amplier.
They are ideally suited for tting inside
a loudspeaker or older tranceiver. They
feature single button operation with selectable
4 or 8 levels of noise reduction.
Order code NEDSP1062-KBD
The bhi Radio Mate compact keypad for the
Yaesu FT817, FT857 and FT897
enables the user to get the best out
of their radio. It has been designed to
make many of the common functions
quick and easy to use. The keypad does
this with a number of fast, effective short-
cuts. 40 memories and frequency nudge mode
included.
Radiomate.
DSP Noise Cancelling as Easy
as 1-2-3
1 - Plug in Audio
2 - Connect Loudspeaker
3 - Connect Power
Easy to use amplied in-line
DSP noise cancelling module.
Use with a speaker or headphones. Full user guide, audio lead
and Fused DC powe lead supplied
ANEM MKII “Noise Away”
Page 7
For NES10-2 MK3 turn to page 8
For NES-5 turn to page 15
1.4 Unpacking
Check that the following items are included in the package:
NES-5 Noise eliminating speaker
or
NES10-2 MK3 DSP Noise eliminating speaker
User manual
2 xing screws
4 self adhesive rubber feet
Grey lter select knob (ts into switch on rear of unit)
1 fused power lead
Customer feedback card
Optional extras if ordered (see section 5):
Processed speech.
Speech with reduced
noise
Figure 2. Audio signal after processing.
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Switch Box
Order code: 1042 Switch Box
Features:
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)
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
The NEDSP1061 modules again feature the bhi noise
reduction DSP. It’s small size allows it to be retro
tted 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. Fitting guides
available for : Yaesu FT817, Kenwood TS50
and Icom 706 MK II G. There are also 3rd
party instructions available to download for the
Yaesu FT-847, FT-897, FRG100, Realistic DX-394, Alinco DX-77 and the
Kenwood TS440.
The module has 4 or 8 levels of noise reduction. Four wires are
provided to integrate the module into the equipment. The fitting
kit includ es a mount ing bracket, keyb oard label and a detaile d
installation manual.
NEDSP1061 low level audio DSP modules
Page 8
Noise Cancellation
Off On
Volume
Rotary lter
select switch
DC Power in Socket
centre pin +Ve
Sensitivity Control
Noise Cancellation
On/Off Switch
NES10-2 MK3 REAR
Audio Input Lead
2.1 Controls
2. NES10-2 MK3
LED
Headphone
socket
Power/Audio
Bypass
Figure 3. NES10-2 MK3 Controls
bhi
Page 25
Other products avaialble from bhi.
NEIM1031 MKII In-line module.
Order code: NEIM1031 MKII
The NEIM1031 MKII now comes with 20%
more audio and a new lter select knob.
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
20 Watt 4 Ohm
Extension speaker
Order code:LSPKR
Teminated with 3.5mm mono
plug
NEIM1031 mounting Stand.
Order code: 1031-STAND
A stand for the NEIM1031.
Holds the module in the optimum
postion.
Horizontal conversion label
Order code:1031-108D
This label changes the
orientation of the NEIM1031
to landscape.
Page 9
2.2 Description
1. The rotary noise cancellation lter level switch allows the
user to select from 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.
The switch settings are shown on the rear of the speaker
(see page 14 for more information).
2. The power-in socket allows the user to connect NES102 MK3 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).
3. 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.
4. Sensitivity control . This controls the input level to the
electronics of the NES10-2 MK3, 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 MK3, so that there is no distortion and the
speaker is not being overdriven.
Page 24
Audio Adaptors:
See tables below for details.
Adaptors for connecting NES10-2 MK3 to equipment
Adaptors for connecting ear/headphones to NES10-2 MK3
Radio Connection Adapter required Order number
6.35mm (1/4”)
mono socket
6.35mm mono plg - 3.5mm mono skt ADP-P001
6.35mm (1/4”)
stereo socket
6.35mm Stereo plug - 3.5mm mono socket ADP-P002
3.5mm Jack
Mono socket
None n/a
Phono socket phono plug - 3.5mm mono socket ADP-P004
2.5mm mono
socket
2.5mm mono plug - 3.5mm mono socket ADP-P005
3.5mm Jack
Stereo socket
3.5mm Stereo plug - 3.5mm mono socket ADP-P003
2.5mm Stereo
socket
2.5mm Stereo plug - 3.5mm stereo socket
(use in conjunction with ADP-P003)
ADP-P006
Headphone Connector Adapter required Order number
3.5mm jack
mono plug
None n/a
3.5mm Jack
Stereo plug
3.5mm stereo socket -3.5mm
mono plug
ADP-S001
6.35mm (1/4”)
Mono plug
6.35mm mono socket - 3.5mm
mono plug
ADP-S002
6.35mm (1/4”)
Stereo plug
6.35mm stereo socket -3.5mm
mono plug
ADP-S003
2.5mm Stereo
plug
2.5mm Stereo socket - 3.5mm
mono plug
ADP-S004
2.5mm mono
plug
2.5mm mono socket - 3.5mm
mono plug
ADP-S005
Page 10
Once set the controls do not normally require any further
adjustments.
5. LED indicator. The LED illuminates red when power is
applied and changes to green when the noise cancellation
is active.
6. 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.
7. Power switch/audio bypass.
This switch turns the speaker on, or 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
8. 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
of the NES102 MK3 is muted.
Page 23
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
via our secure online shop at www.bhi-ltd-shop.com.
Power:
1030-UKPA UK mains power adapter
1030-EUPA European mains power adaptor
1030-VEPL Vehicle power adapter
1030-2WVA 2 Way vehicle power adaptor
Audio:
1030-EXLE Audio Extension lead (2M)
ALD-001 3.5mm - 3.5 mm mono audio lead
1.2M long.
ALD-002 3.5mm - 3.5mm mono audio lead
2.5M long.
ALD-003 Phono - phono lead mono lead
1.2M long.
ALD-004 3.5mm Stereo - 2 x phono lead
1.2M long.
5. Accessories
LED colour Off Red Green
Description Power off
audio
bypassed
Power on
noise
cancellation
off
Power on
noise
cancellation
on
Page 11
2.3 Specication
Noise attenuation - 9 - 35dB
Number of attenuation levels - 8
Tone reduction - 4 - 65dB
Audio input power - 5W rms max
Audio output power - 2.8W rms max
Audio connection - Integral 3.5mm mono
jack plug, 2m lead.
Headphone connection -3.5mm mono jack
socket
DC power - 12-24V dc. 500mA
Size - 110 x 65 x 55mm
Weight - 300gms
2.4
NES10-2 MK3 basic connection diagram
For use with standard radio communication equipment, follow the
diagrams and procedures on page 12. For in vehicle use, t the
speaker in a suitable location using the bracket and xing screws
supplied. Ensure the bracket does not foul the power switch.
Note: It is recommended that this is carried out by a
qualied 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 22
See FAQs on our website for further information
and help.
What adjustments do I need to make during use?
Apart from changing the lter level to suit the current listening conditions, once the NES10-2 MK3 is set to your personal settings no
further adjustments should be necessary.
Can the speakers be used with a switch mode
power supply?
We don’t recommend this, but some good quality switch mode
power supplies do work ok. The speakers should normally be
used with linear suppplies if possible to avoid possible noise prob-
lems caused by poor quality switch mode power supplies.
Sometimes I can hear watery noises.
When listening to high levels of noise where the DSP is trying to
differentiate the speech signal from the noise on high lter level
settings, the background may sound a little strange and the speech
may sound a little watery. This is normal operation as the DSP is
removing the high levels of noise.
Page 12
Figure 4. NES10-2 MK3 connections
2.1mm power connector
centre +Ve
14.2000
000
14.195.00
145.0
For adaptors see section 5
Optional 1030-UKPAMains
Power Adaptor
Optional In-vehicle
power lead 1030-VEPL
Rubber feet
x 4
Fixing Screws
x2
Page 21
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.
Figure 8. Power lead suppression.
Fit another ferrite at the other end of the power lead
Try transmitting again, if the problem is cured, try removing the
previous ferrite(s).
Figure 9. Additional power lead suppression.
Try transmitting again. If the problem persists , then move onto the
next step.
If the problem is cured, try removing the rst ferrite.
3.5mm audio plug
Page 13
2.5 NES10-2 basic set-up procedure
and
operation
1. 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 MK3.
Note: Make sure the centre pole of your power supply connector is connected to positive (+ve).
Switch the power switch on.
2. Switch the noise-cancelling switch off. The front panel LED
should be illuminated red.
3. Turn the sensitivity control fully anticlockwise, and then back a
quarter of a turn.
4. 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 MK3.
(see section 5)
5. Set the rotary noise cancellation lter level switch to level 6 to
start with.
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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.
1. Reduce the sensitivity control (NES10-2 only)
2. Connect the speaker to a separate power
supply (available from bhi - see section 5).
3. Ferrites
Wind as many turns as possible
around the ferrite
Audio Lead
If problem persist then t another ferrite at the other end of the
lead close to the audio connector
Figure 6. Audio lead
Figure 7. Audio lead
1” (25mm)
ferrite ring
Page 14
6. 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.
7. Tune into the station or channel you require.
8. Turn the noise cancelling on, the front panel LED changes from red to
green indicating the noise cancellation is active.
9. Adjust the lter level setting if required to remove higher levels of noise
and improve the intelligibility and clarity of the speech signal.
Note:
Remove the small grey
filter select knob from
the sma l l re d p la s ti c
accessories bag inside the
NES10-2 MK3, and press
t into the switch body at
the rear, making sure to
line up the mark on the
knob with the arrow on
the switch.
Page 19
With the noise cancellation switch in the off position, make
sure that you have the sensitivity control on the NES10-2 MK3
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:
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 other products that will work with these levels of
signal ,the NEIM1031 MKII (Noise eliminating In-line Module)
and ANEM MKII compact 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.
Filter Level Attenuation
1 9dB
2 11dB
3 13dB
4 15dB
5 17dB
6 20dB
7 24dB
8 35dB
Page 15
3.1 NES-5 Connections
14.2000
000
14.195.00
145.0
Optional In-vehicle power lead
Optional Mains
Power Adaptor
3. NES-5
3.5mm Jack plug
Figure 5. NES-5 connection detail
For adaptors see section
5
Rubber feet
x 4
Fixing Screws
x2
Page 18
Speaker doesn’t work at all, no sound from the
speaker:
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 equip-
ment 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 MK3
only).
The speaker works but the noise cancellation doesn’t
appear to improve the audio quality of the signal:
Check that the LED on the front of the NES10-2 MK3 changes
from red to green when the noise cancellation is switched off
and on (NES10-2 MK3 only).
Now switch the noise cancellation on, you should clearly hear
the difference now.
4. Troubleshooting/FAQs
Page 16
3.2 Description
1. 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. 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 Specication
Noise attenuation - 20 dB
Tone reduction - 20 dB
Audio input power - 5W rms max
Audio output power - 2.5W rms max
Audio connection - 3.5mm mono jack
plug, 2m lead.
DC power - 12-24V dc. 500mA
Size - 110 x 65 x 55mm
Weight - 200gms
Page 17
3.4 NES-5 basic set-up procedure and
operation
1. 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).
2. 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).
3. Switch on and the NES5 will automatically remove unwanted
noise and interference.
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