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DSP Noise Cancellation
22 Woolven Close
tel: +44 (0)845 217 9926
fax: +44 (0)845 217 9936
Page 36
NEDSP1061-KBD Operating Manual
bhi
bhi
bhi
bhi
bhi
bhi Ltd
Burgess Hill
West Sussex
RH15 9RR
sales@bhi-ltd.co.uk
www.bhi-ltd.co.uk
bhi
bhi
bhi
bhi
bhi
NEDSP1061-KBD
Noise Eliminating PCB Module
I
nstallation
and
O
perating
Complete with detailed fitting instructions for
Yaesu FT-817, Icom 706 MKII G
and Kenwood TS50
1061-110D
Issue D
NEDSP1061-KBD Operating Manual
M
anual
Page 1
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Summary of Contents for BHI NEDSP1061-KBD
- Page 1 +44 (0)845 217 9926 Complete with detailed fitting instructions for fax: +44 (0)845 217 9936 Yaesu FT-817, Icom 706 MKII G and Kenwood TS50 sales@bhi-ltd.co.uk www.bhi-ltd.co.uk 1061-110D Issue D Page 1 Page 36 NEDSP1061-KBD Operating Manual NEDSP1061-KBD Operating Manual...
- Page 2 Furthermore, NEIM1031 accessories. 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 Please check the contents of the box. adapters to suit most equipment, please call or visit www.bhi- ltd.co.uk for more information. Full contact details on back page. NES10-2 MKII Noise Eliminating speaker.
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Page 4: Table Of Contents
3.2 Circuit location Figure 7. NEDSP1061-KBD module 3.3 Fitting mounting. 3.3.1 Audio connections 3.3.2 Power connections Setup Affix the bhi DSP label to the Troubleshooting lid, over the keyboard and LED. Operation 6.1 Introduction bhi DSP label 6.2 Operation 6.3 Demonstration mode 6.4 Notes about noise reduction... - Page 5 Connect the black power lead from the NEDSP1061- KBD module to the fan mounting screw, as shown in figure 6. NEDSP1061-KBD connection Figure 6. 0V connection from the NEDSP1061-KBD module. Page 32 Page 5 NEDSP1061-KBD Operating Manual NEDSP1061-KBD Operating Manual...
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Page 6: Introduction
1. Introduction. Cut the white wire clos- Cut the white wire The NEDSP1061-KBD is a modular solution to noise est to the front of the reduction. It incorporates DSP technology to provide up transceiver. to 35dB of noise cancellation. The module is controlled... -
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
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. Push Bi-colour Beep volume... -
Page 9: Electrical Characteristics
12. Solder the red audio wire from the DSP board to Controls are provided to allow the NEDSP1061-KBD to the lead coming out of the plug and insulate with be integrated in to the target system. 3 level controls are tape. -
Page 10: Overload Led
(e.g. FT-817) Remove the plug from CN10 and clip the white wire Cover the keyboard holes with the supplied self adhesive that is next to the ground in the middle. label. Page 10 Page 27 NEDSP1061-KBD Operating Manual NEDSP1061-KBD Operating Manual... -
Page 11: Installation
(IC7) This track is between C127 elect cap and C126 elect surface mount cap. There is a + printed on top of this track for C126 (see figure 1). Figure 4. NEDSP1061-KBD Audio path Page 26 Page 11 NEDSP1061-KBD Operating Manual... -
Page 12: Fitting
Clamp ‘Z’ bracket Power amp Volume Loudspeaker NEDSP1061 Figure 5. NEDSP1061- ‘Z’ bracket Loudspeaker bracket Fit the NEDSP1061-KBD KBD recommended module in place of position. the coupling capacitor Figure 4. Keyboard mounting Note: On some modern receivers/transceivers the volume control is digital and doesn’t operate in the audio path. -
Page 13: Power Connections
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. Figure 3. Fitted module Page 24 Page 13 NEDSP1061-KBD Operating Manual NEDSP1061-KBD Operating Manual... -
Page 14: Setup
4. Setup Replace the main unit PCB. The levels come factory set to the maximum position. The NEDSP1061-KBD screened lead fits in the cut out This should be adequate for most applications. However provided for the front antenna connector. the module can be adjusted as follows. -
Page 15: Troubleshooting
(see page Reduce output level using P1 Q1057 Lower side of main unit Screen Blue wire Distortion Red wire R1482 Q1084 Figure 6. Troubleshooting flowchart. Figure 2.NEDSP1061-KBD connection detail Page 22 Page 15 NEDSP1061-KBD Operating Manual NEDSP1061-KBD Operating Manual... -
Page 16: Operation
To place the module into the audio path it is necessary 6.1 Introduction. to remove the audio signal coupling capacitor C1338. All functions of the NEDSP1061-KBD are controlled by a single button. The following diagram shows the position of the com- ponent. -
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 This document should be read in conjunction with the the number of DSP levels it is necessary to put the module relevant Yaesu FT-817 technical supplement. -
Page 18: Noise Reduction Level
This is quite normal when listening diameter to high levels of noise at these levels. 6.5 Noise reduction levels. Keyboard hole detail Figure 7. Hole machining details. Page 19 Page 18 NEDSP1061-KBD Operating Manual NEDSP1061-KBD Operating Manual...
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