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Summary of Contents for BHI NEDSP1061-KBD
- Page 2 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’...
- Page 3 NEDSP1061-KBD assembly • ‘Z’ bracket • Self adhesive mounting pads • bhi NEDSP keyboard label • To 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.
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Page 4: Table Of Contents
Contents Introduction 1.1 NEDSP1061-KBD features 1.2 Limitations 1.3 Audio DSP noise cancellation Module description 2.1 Module layout 2.2 Connections 2.3 Electrical characteristics 2.4 Controls 2.4.1 Input level 2.4.2 Output level 2.4.3 Beep volume level 2.4.4 Overload LED 2.5 Module mounting Installation 3.1 Introduction... - Page 5 Machining drawings Appendices Appendix A Yaesu FT-817 fitting instructions Appendix B Kenwood TS-50 fitting instructions Appendix C Icom 706 MKII G fitting instructions Appendix D Other bhi products Page 5 NEDSP1061-KBD Operating Manual...
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Page 6: Introduction
1. Introduction. 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 •... -
Page 7: Audio Dsp Noise Cancellation
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. -
Page 8: Module Description
(P3) Red wire M3 Ring Tag (5-15VDC) (0V) Figure 2. Module layout. 2.2 Module Connections. The NEDSP1061-KBD module has five connections. Red wire: 5 - 15VDC M3 Tag: Screened Lead: Audio In (to module) Blue Audio Out (from module) -
Page 9: Electrical Characteristics
2.3 Electrical characteristics. a t l 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. -
Page 10: Overload Led
In some equipment it may be possible to clamp the bracket under the loudspeaker bracket (e.g. FT-817) Cover the keyboard holes with the supplied self adhesive label. Page 10 NEDSP1061-KBD Operating Manual... -
Page 13: Power Connections
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 routing the wires, ensure they are away from strong sources of RF or high voltage. Page 13 NEDSP1061-KBD Operating Manual... -
Page 14: Setup
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. Page 14 NEDSP1061-KBD Operating Manual... -
Page 16: Operation
6. Operation 6.1 Introduction. All functions of the NEDSP1061-KBD are controlled by a single button. Single press turns the noise cancellation on/off. • Holding down the button changes the DSP filter • level. The mode of operation is indicated both visually and audibly. -
Page 17: Demonstration Mode
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:... -
Page 18: Notes About Noise Reduction
6.4 Notes about the noise reduction. When using the module on level 4/4 or level 8/8 some distortion may be heard. This is quite normal when listening to weak signals with high levels of noise present. 6.5 Noise reduction levels. Page 18 NEDSP1061-KBD Operating Manual... - Page 20 This document should be read in conjunction with the relevant Yaesu FT-817 technical supplement. The bhi NEDSP1061-KBD module is 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.
- Page 21 C1338. The following diagram shows the position of the com- ponent. Carefully remove the capacitor. Connect the screened lead from the NEDSP1061-KBD module as follows: Red lead - to R1482 side of C1338 (audio in) •...
- Page 22 Location of Q1082 (TP1084) on upper side of main unit Connect Red (+Ve wire) to this point (see page Q1057 Lower side of main unit Screen Blue wire Red wire R1482 Q1084 Figure 2.NEDSP1061-KBD connection detail Page 22 NEDSP1061-KBD Operating Manual...
- Page 23 Replace the main unit PCB. The NEDSP1061-KBD screened lead fits in the cut out provided for the front antenna connector. Replace the main unit, connections, and all screws except the front right hand screw. Drill the holes for the lid, as per the drawing on page 25 of this manual.
- Page 25 Place the ‘Z’ bracket over the keyboard, carefully • easing the bracket into position Retighten the loudspeaker bracket. • Clamp ‘Z’ bracket ‘Z’ bracket Loudspeaker bracket Figure 4. Keyboard mounting Figure 5. Hole drilling detail Page 25 NEDSP1061-KBD Operating Manual...
- Page 27 Carefully scrape the solder mask off the track to expose the copper. Solder the red lead of the DSP board to this point. Remove the plug from CN10 and clip the white wire that is next to the ground in the middle. Page 27 NEDSP1061-KBD Operating Manual...
- Page 28 13. Solder the blue audio wire from the DSP board to the remaining lead and insulate with tape. Switch Figure 5. Switch mounting detail. Page 28 NEDSP1061-KBD Operating Manual...
- Page 29 (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. 3.5mm diameter diameter 25.0...
- Page 30 4 pin con- Figure 1. Loudspeaker nector J1431. This connec- connector tor can be located on the right hand side at the front of the main board. Audio connector Figure 2. Location of connector J1431 Page 30 NEDSP1061-KBD Operating Manual...
- Page 33 Carefully replace the lid ensuring that none of the wires are trapped. NEDSP1061-KBD ‘Z’ clamp Figure 7. NEDSP1061-KBD module mounting. Affix the bhi DSP label to the lid, over the keyboard and LED. bhi DSP label Page 33 NEDSP1061-KBD Operating Manual...
- Page 34 Appendix D Other bhi products Other noise cancellation products from bhi. Visit www.bhi-ltd.com for more information. 6.1 NES10-2 MK3 Noise Eliminating speaker. Amplified DSP noise cancellation speaker with new rotary filtter select knob and increased audio power. Features: • Fully adaptive noise cancellation 9 -35dB •...
- Page 35 Amplified DSP modules. Easy to install retrofit for existing equipment and extension speak- ers or older tranceivers NEDSP1062-PCB: Basic amplified DSP module. NEDSP1062 - KBD: Pre-wired amplified DSP module controlled by a 2 button keyboard. Page 35 NEDSP1061-KBD Operating Manual...
- Page 36 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 Page 36 NEDSP1061-KBD Operating Manual...
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