BHI NEDSP1061-KBD Installation And Operating Manual Download Page 1 | Manualshive

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Summary of Contents for NEDSP1061-KBD

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Page 2: ...cation 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 i...

Page 3: ...install this module you will need the following 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 for your equipment ...

Page 4: ...ontrols 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 Module mounting 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 Power connections 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...

Page 5: ...ting Manual 7 Machining drawings 19 Appendices Appendix A 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 6: ... 35dB of noise cancellation 4 or 8 levels of noise reduction selectable on power up 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 guarant...

Page 7: ...sses 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 ...

Page 8: ...odule 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 9: ... 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...

Page 10: ...um 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 used to retain the 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...

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Page 13: ...ssipate Locate a convenient point to connect the power Ensure that this point is connected after the power switch otherwise the DSP module will be drawing power all the time and may discharge the batteries where fitted Connect the red wire to this point The 0V connection is formed using the M3 ring tag Locate a suitable 0V point such as a PCB retaining screw that is fixed into the chassis When rou...

Page 14: ...s follows Tune the equipment to a strong signal Switch off the noise reduction LED should illuminate orange or red Adjust the input P2 until the overload led illuminates Back off the potentiometer approximately a 1 4 of a turn Adjust P1 to give the correct listening volume without distortion Adjust P3 to give the desired beep volume level or off if required 4 Setup 4 Setup ...

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Page 16: ... 4 level mode When the noise cancellation level is changed the LED will flash green to indicate which level has been selected and simultaneously the DSP will beep to give audible indication of DSP level This allows the operator to change the DSP level without having to look at the LED to see which level has been selected A short beep is emitted to acknowledge a button press The module will store t...

Page 17: ...bility to select 4 or 8 filter levels These demonstrate the noise cancellation abilities of the NEDSP1061 KBD module and the filter level select mode To listen to the demonstration modes or change the number of DSP levels it is necessary to put the module into the set up mode 6 3 1 Demonstration 1 Hold down the button and switch on the equipment After a short time the unit will emit a 2 tone beep ...

Page 18: ... at level 4 in 8 level mode release the button to select this mode After the fourth 2 tone beep the module enters the filter level select mode Release the button after either the 4 or 8 beeps to select the desired level mode The module will return to normal operation after this or hold down the button until the 2 tone beep is heard Release the button after a short delay the LED will flash indicati...

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Page 20: ... inserted into the audio path of the transceiver at a point before the volume control To access this point it is necessary to remove the main unit Remove any fitted batteries or NiCad pack before commencing installation Remove the top and bottom covers Remove the 5 main unit fixing screws Disconnect all connections apart from the front unit ribbon cable Hinge the main unit forward over the front u...

Page 21: ...apacitor Connect the screened lead from the NEDSP1061 KBD module as follows Red lead to R1482 side of C1338 audio in Blue lead to the other side of C1338 audio out Screen to the grounded connection close to the capacitor See figure 1 below for details NEDSP1061 Q1094 R1268 15K C1460 100p R1482 1K C1338 100n Remove R1317 100K R1459 10K To Volume control Red wire Blue wire Figure 1 Schematic detail ...

Page 22: ...Red wire Figure 2 NEDSP1061 KBD connection detail Q1084 Q1057 R1482 Lower side of main unit Location of C1338 on lower side of main unit Location of Q1082 TP1084 on upper side of main unit Connect Red Ve wire to this point see page 23 Appendix A Yaesu FT 817 ...

Page 23: ...ard to the inside of the lid Taking care to not get adhesive on the upper surface of the lid switch or LED Allow this to cure before continuing Appendix A Yaesu FT 817 Replace the main unit PCB Solder the red power lead to the drain of Q1082 TP1084 Connect M3 ring tag 0V leads using the right front screw Affix the NEDSP1061 KBD module using the supplied self adhesive pad in the chosen location The...

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Page 25: ...ing detail Keyboard mounting using the Z bracket Slacken the screws retaining the loudspeaker Position keyboard into the lid cutouts Place the Z bracket over the keyboard carefully easing the bracket into position Retighten the loudspeaker bracket Loudspeaker bracket Z bracket Clamp Z bracket Front edge of lid ...

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Page 27: ...f 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 ...

Page 28: ... 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 ...

Page 29: ...nched 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 ...

Page 30: ...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 ...

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Page 33: ...ker 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 ...

Page 34: ...ion speaker with new rotary filtter select knob and increased audio power 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 24VDC operation On Off audio bypass switch Easy to install with adjustable mounting bracket 2m audio l...

Page 35: ...ancellation On Off switch Line level in out Input overload indication Power on off with audio bypass NEIM1031 accessories LSPKR Quality 4 ohm 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 Allows the NEIM1031 to be mounted for a more comfortable operating position NEDSP1062 KBD Pr...

Page 36: ...1 KBD Operating Manual bhi bhi bhi bhi bhi DSP Noise Cancelling Products from bhi DSP Noise Cancellation bhi Ltd 22 Woolven Close Burgess Hill West Sussex RH15 9RR tel 44 0 1444 870333 sales bhi ltd com www bhi ltd com ...

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