BHI NEDSP1061-KBD User manual

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual Page 1
bhibhi
bhibhi
bhi
NEDSP1061-KBD
Noise Eliminating PCB Module
Installation
and
Operating Manual
Sound Engineering Solutions from bhi
1061-110D
Issue D
Complete with detailed fitting instructions for
Yaesu FT-817, Icom 706 MKII G
and Kenwood TS50
Page 36
bhibhi
bhibhi
bhi
Sound Engineering Solutions
DSP Noise Cancellation
bhi Ltd
22 Woolven Close
Burgess Hill
West Sussex
RH15 9RR
tel: [phone]
fax: [phone]
[email protected]
www.bhi-ltd.co.uk

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual
Page 2
Important Information
Copyright
This publication, including all photographs and illustrations is
protectedunderinternationalcopyrightlaws,withallrightsreserved.
Neither this manual, nor any of the material within, may be copied
or reproduced without the written consent of bhi Ltd.
Disclaimer
Theinformationinthisdocumentissubjecttochangewithoutnotice.
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.
The fitting of the bhi NEDSP1061-KBD module may involve the
removal of small surface mount components and the drilling out of
the transceivers’case.This should only be carried out by a qualified
engineer. bhi accepts no responsibility for the fitting or installation
of the NEDSP1061-KBD module and are not liable for any damage
toequipmentcausedbyitsfitment.Fittingthis module may invalidate
your warranty.
All attempts have been made to ensure that this information is up to
date. It is possible that these instructions contain errors, or the
equipment is slightly different to the one used to compile this
information. In all cases it is up to the installer to ensure that the
module is fitted correctly.
By installing this module you are doing so at your own risk.
Page 35
Appendix D Other bhi products.Appendix D Other bhi products. Appendix D Other bhi products.Appendix D Other bhi products.
Appendix D Other bhi products.
NEIM1031 In-line module.
The NEIM1031 provides a flexible solution to noise reduction and
easily fits between your quipment and speaker.
Features:
•Fully adaptive noise cancellation 9 -35dB
•8 user selectable noise cancellation levels
•Mono earpiece socket
•Input sensitivity control
•Noise cancellation On/Off switch
•Line level in/out
•Input overload indication
•Power on/off with audio bypass.
NEIM1031 accessories.
LSPKR
Quality 20 Watt extension
speaker for use with the
NEIM1031or any other audio
equipment. Fitted with a
3.5mm mono jack plug.
1031-STAND
Perspex mounting stand for the
NEIM1031.AllowstheNEIM1031
tobemountedforamore comfort-
ableoperatingposition.
NEDSP1062 - KBD: Amplified DSP module
controlled by a 2 button
keyboard.
1030-UKPA UK DC power adapter
1030-EUPA European DC power adapter
Easy to install retrofit for existing equipment and extension speak-
ers
NEDSP1062-PCB: Basic amplified DSP
module.
Amplified DSP modules.

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual Page 3
Packing List:
Please check the contents of the box.
•Operating manual
•NEDSP1061-KBD assembly
•‘Z’ bracket
•Self adhesive mounting pads
•bhi NEDSP keyboard label
Toinstallthismodule you willneedthefollowing additional
items:
•service manual/circuit diagram of the equipment in
which the module is to be installed.
•all the appropriate tools to disassembling the
equipment
•suitable soldering iron and bits for working with
surface mount devices.
Before attempting to fit this module study this manual
thoroughly along with the service manual and
circuit diagramforyour equipment.Becarefulnot tomove
the wires on the module too much as this could lead to
damage.
Page 34
Appendix D Other bhi products.Appendix D Other bhi products. Appendix D Other bhi products.Appendix D Other bhi products.
Appendix D Other bhi products.
Appendix D
Other bhi products
bhi stock a comprehensive range of audio accessories and
adapters to suit most equipment, please call or visit www.bhi-
ltd.co.uk for more information. Full contact details on back page.
bhi DSP noise cancellation built into a
compact2.5Wattamplified speakerunit. the
unit provides an easy to install solution to
noise reduction and easily connects to the
extension speaker speaker socket or
headphonesocketofyourequipment.
Key features:
•Fully adaptive noise cancellation 9 -35dB
•8 user selectable noise cancellation levels
•Mono earpiece socket
•Input sensitivity control
•Noise cancellation On/Off switch
•LED indication of power and noise cancellation
•12-24VDCoperation
•On/Off audio bypass switch.
NES10-2 MKII Noise Eliminating speaker.
Basic plug and go noise cancelling
speaker preset to 20dB of noise
reduction. Easily connecst to the
extension speaker or headphone
socket on your equipment.
Key features:
•Fully adaptive noise cancellation 20dB
•12-24VDCoperation
NES5 Noise Eliminating speaker.
1042 switch box.
Allows up to 6 pieces of
equipment to be connected to
one speaker or inline module. 3
inputs loaded at 8 ohms.

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual
Page 4
1. Introduction
1.1 NEDSP1061-KBD features 6
1.2 Limitations 6
1.3 Audio DSP noise cancellation 7
2. Module description
2.1 Module layout 8
2.2 Connections 8
2.3 Electrical characteristics 9
2.4 Controls 9
2.4.1 Input level 9
2.4.2 Output level 9
2.4.3 Beep volume level 9
2.4.4 Overload LED 9
2.5 Modulemounting 10
3. Installation 11
3.1 Introduction 11
3.2 Circuit location 11
3.3 Fitting 12
3.3.1 Audio connections 12
3.3.2 Powerconnections 13
4. Setup 14
5. Troubleshooting 15
6. Operation 16
6.1 Introduction 16
6.2 Operation 16
6.3 Demonstration mode 17
6.4 Notes about noise reduction 18
6.5 Noise reduction level 18
Contents
Page 33
The keyboard is retained using the supplied ‘Z’ bracket,
held in place by the loudspeaker clamp. Fix the dsp
module to the inside of the lid using the self adhesive
tape supplied.
Carefully replace the lid ensuring that none of the wires
are trapped.
Affix the bhi DSP label to the
lid, over the keyboard and
LED.
Figure 7. NEDSP1061-KBD module
mounting.
‘Z’ clamp
NEDSP1061-KBD
bhi DSP label
Appendix C Icom 706 MKII G

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual Page 5
7. Machining drawings 19
Appendices
AppendixA
Yaesu FT-817 fitting instructions 20
Appendix B
Kenwood TS-50 fitting instructions 26
Appendix C
Icom 706 MKII G fitting instructions 30
Appendix D
Other bhi products 34
Page 32
Drill the keyboard holes in the case lid as shown in the
following diagram. Ensure the holes are de-burred.
Figure 5. Case lid machining diagram
Connect the black power lead from the NEDSP1061-
KBD module to the fan mounting screw, as shown in
figure 6.
Figure 6. 0V connection from the NEDSP1061-KBD
module.
NEDSP1061-KBD
0V
connection
Appendix C Icom 706 MKII G
5.1
70
59
4.0mm
3.5mm

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual
Page 6
The NEDSP1061-KBD is a modular solution to noise
reduction. It incorporates DSP technology to provide up
to 35dB of noise cancellation. The module is controlled
by a single pushbutton with LED indication for ease of
use.
1.1 NEDSP1061-KBD module features:
•Fully adaptive to changing noise environments
•Input and output level controls
•Input overload indication
•Virtually no distortion to speech signal
•Up to 35dB of noise cancellation
•4or 8 levelsofnoisereduction selectable onpowerup
•5 – 15V supply range
•4.6dB on board gain
•Single key operation of all functions
•LED indication of DSP level and status
•Small size 26mm x 37mm
1.2 Limitations.
This module is designed to pass speech. Other signals
such as data and music will to some degree pass
through, but the integrity of these signals
cannot be guaranteed.
Thismoduleisdesigned to be placed in a low level audio
path only. The module will not drive a loudspeaker or
other high power load (see bhi NEDSP1062 amplified
DSP module).
The unit is single channel (mono).
1. Introduction.
1. Introduction.
Page 31
Cut the white wire clos-
est to the front of the
transceiver.
Connect the
NEDSP1061-KBD
screened lead as fol-
lows:
Red wire to connector
J1431
Blue wire to remaining
end of the cut lead.
Screen - cut off.
Figure 3. J1431 modified
connections.
The red power lead for
the NEDSP1061-KBD
is connected to the
PCB. Carefully remove
the solder mask from
the PCB surface in the
position shown in figure
4. (it may be necessary
to lengthen the lead).
Figure 4. PCB modification for power lead
;;
;;
yy
yy
Flat cable
J1381
C897
C1381
R1169 R1170
Remove solder
mask here
Connect Red
+Ve lead from
the NEDSP1061
here
Cut the white wire
Insulate both the connections with the supplied rubber
sleeves.
Appendix C Icom 706 MKII G

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual Page 7
This module is designed for communication type
applications. The upper frequency limit is 4.5KHz and
therefore not suitable for hi fidelity applications.
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 is 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. Noise cancellation.
Original signal.
Speech with a lot of
background noise
Processed speech.
Speech with reduced
noise
Speech Noise
Reduced noise
1. Introduction.
Page 30
Appendix C
Icom 706 MKII G
This document should be read in conjunction with the
relevant Icom 706 MKII G technical supplement.
Disconnect the power before commencing.
Figure 1. Loudspeaker
connector
Remove the 5 screws re-
taining the top cover.
Disconnect all the loud-
speaker connector.
Remove the lid.
The NEDSP1061-KBD
module is inserted into the
audio path on the 4 pin con-
nector J1431. This connec-
tor can be
located on the right hand side at the front of the main
board.
Audio connector
Figure 2. Location of
connector J1431
Appendix C Icom 706 MKII G

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual
Page 8
2.1 Module Layout.
The following diagram shows the layout of the
NEDSP1061-KBD module.
Figure 2. Module layout.
2.2 Module Connections.
The NEDSP1061-KBD module has five connections.
Red wire: 5 - 15VDC
M3 Tag:0V
Screened Lead:Red Audio In (to module)
Blue Audio Out (from module)
Black Audio Screen
2. Module Description.
Output level
(P1) Input level (P2)
Bi-colour
LED
Beep volume
(P3)
Red wire
(5-15VDC) M3 Ring Tag
(0V)
Overload LED
Push
button
Screened audio
lead
2. Module description.
Page 29
Figure 6. Switch mounting hole details.
Appendix B Kenwood TS50.
14. Solderthe screen fromtheDSPboard to theground
on CN10 and insulate with tape.
15. Refit CN10 plug into CN10 socket.
16. Replacethe speaker andspeakermountingbracket
making sure no wires are getting pinched.
17. Place two thicknesses of double sided tape to the
front right corner of the speaker bracket and mount
switch PCB (see figure 5).
18. Connect radio to power and aerial and test DSP
board works OK readjust beep, input and output
levels if required. (Details in section 4 page 14)
19. Drill the top cover as detailed below.
20. Place the cover on the radio and check alignment
of the switch and adjust if necessary.
21. Replace the top cover screws and fit the bhi label.
5.1
52.0
25.0
4mm
diameter
3.5mm
diameter
Front

NEDSP1061-KBD Operating Manual
NEDSP1061-KBD Operating Manual Page 9
2.3 Electrical characteristics.
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Table 1. NEDSP1061-KBD Electrical characeristics
2.4 Controls.
Controls are provided to allow the NEDSP1061-KBD to
be integrated in to the target system. 3 level controls are
provided.
2.4.1 Input Level:
To set the audio level to the optimum level for the DSP.
2.4.2 Output Level:
To match the output level of the DSP module to that of
the following stage.
2.4.3 Beep volume level:
Allows the user to adjust the beep volume control to suit.
The beep volume can be reduced to zero if required.
The modules are factory set to the maximum level.
Turning the potentiometers anti clock wise will increase
the levels.
2. Module Description.
Page 28
10. Strip and tin the two ends of the clipped lead.
11. Remove some insulation from the CN10 ground
wire and tin.
12. Solder the red audio wire from the DSP board to
the lead coming out of the plug and insulate with
tape.
13. Solder the blue audio wire from the DSP board to
the remaining lead and insulate with tape.
Figure 5. Switch mounting detail.
Switch
Appendix B Kenwood TS50.
Figure 4. CN10 wiring detail.

NEDSP1061-KBD Operating Manual
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Page 10
Note:
The potentiometers do not have end stops. It is possible
to set the potentiometer in a dead band between the
ends, resulting in the audio being lost, continue rotating
and the audio will return.
2.4.4 Overload LED.
The overload LED circuit monitors the amplitude of the
audio level entering the DSP module. The LED will
illuminate when the amplitude exceeds the maximum
permitted level. If the amplitude is increased further the
DSP will clamp the audio signal to prevent damage to
theDSPinput.Thiswill cause the audio signal to become
distorted. The optimum level is achieved when the
loudest peaks of the input audio, just cause the LED to
glow.
2.5 Module mounting.
The DSP module has four mounting holes that can be
usedtoretainthe unit inside the equipment.Alternatively
a self adhesive pad is supplied to allow the module to be
mounted in a convenient position - without the need for
drilling.
Two holes need to be drilled in the casing of the
equipment for the keyboard. Hole sizes and positions
can be found in section 7 - page 19.
Thekeyboardcanretainedusingthesupplied‘Z’bracket
oralternativelyretainedusingasuitableadhesive, or the
mounting pads supplied.
In some equipment it may be possible to clamp the
bracket under the loudspeaker bracket (e.g. FT-817)
Coverthekeyboard holes with the supplied self adhesive
label.
2. Module Description.
Page 27
7. Carefully scrape the solder mask off the track to
expose the copper.
8. Solder the red lead of the DSP board to this point.
9. Remove the plug from CN10 and clip the white wire
that is next to the ground in the middle.
Figure 3. Position of red wire.
Appendix B Kenwood TS50.
Figure 2. Location of earth point.
Earth Screw