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NEIM 1031
Noise Eliminating In-Line Module
Audio
Line
Line
Out
In
Connections
Input Selector
NEIM1031
12-24VDC Input
+
OK
Overload
5
6
bhi
4
7
3
8
2
9
1
10
Input Level
0=MIN
Off
On
Power
Filter Level
Line Out Level
5
6
7
4
3
8
9
2
Noise Cancellation
1
10
Output Level
Noise Eliminating In-Line Module
Headphone Socket
1031-106D
Issue C
bhi
Audio
-
7=MAX
On
Page 1
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Table of Contents
Related Manuals for BHI NEIM 1031
Summary of Contents for BHI NEIM 1031
- Page 1 NEIM 1031 Noise Eliminating In-Line Module Audio Line Line Audio Connections Input Selector NEIM1031 12-24VDC Input Overload Input Level 7=MAX 0=MIN Power Filter Level Line Out Level Noise Cancellation Output Level Noise Eliminating In-Line Module Headphone Socket 1031-106D Page 1...
- Page 2 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 NEIM1031 may be connected to audio recording equipment.
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Page 3: Table Of Contents
Typical connections Radio communications Audio restoration Surveillance/CCTV/Video Recording using a PC sound card Connecting several audio sources Controls Control layout Control functions Setup Signal levels Noise cancellation Troubleshooting/FAQs Specifications Accessories Power Audio Audio adaptors Headphone adaptors bhi Support Page 3... -
Page 4: Introduction
Note: The NEIM1031 is not designed to pass music. Packing List. The NEIM1031 is shipped with the following: Description bhi Part No. Noise eliminating module NEIM1031 Fused Power Lead 1030-FPL Mono Audio lead 1.2M... -
Page 5: Connections
3. Connections. All audio connections are at the rear of the unit. The headphone connection has been placed at the front of the unit for easy access. As the audio signals are bypassed when the power is removed there is no need to disconnect the unit when not in use. -
Page 6: Connector Layout
Line out: Phono socket Low level audio out. For connection to an amplifier, recorder, or any other line level device. 3.2 Connector Layout. Top View Line out Line In Audio out Audio In Audio Line Line Audio Connections Input Selector NEIM1031 12-24VDC Input Overload... -
Page 7: Typical Connections
3.3 Typical Connections. Recording Device Audio source 14.2000 14.195.00 Line in Audio Amplifier Audio supply Audio Line Line Audio Extension Speaker Connections Input Selector (EXSPR-001) 12-24V DC NEIM1031 12-24VDC Input Overload Input Level 0=MIN 7=MAX Optional Mains Power Filter Level adaptor Line Out Level (See page 20) -
Page 8: Radio Communications
The following pages show typical applications and connections to the NEIM1031. For connection of headphones or extension speakers refer to the diagram on page 7. Numbers in brackets indicate bhi part numbers. These are available as optional extras - see accessory section. -
Page 9: Audio Restoration
3.5 Audio restoration. Connect the audio source and recording device as shown. If the source is monaural, one channel may be fed directly into the recorder to copy the unprocessed audio for comparison. (ALD-003 phono- Recording Audio Source phono) Line In Left Right Line In... -
Page 10: Surveillance/Cctv/Video
3.6 Surveillance/CCTV/Video. Connection to video recording equipment (audio). In this application the NEIM1031 is being used to remove the background noise being recorded from the video camera. Again in this application both the processed and raw audio are being recorded simultaneously. Video connection Unprocessed audio Line out... -
Page 11: Recording Using A Pc Sound Card
3.7 Recording using a PC sound card. The sound capturing capability of the PC sound card may be used to record (or playback) audio signals. (ALD-004 3.5mm stereo - 2 x phono) Unprocessed audio 14.2000 14.195.00 Line Out Line In PC Sound Card Audio Source (ALD-003 phono-phono) -
Page 12: Connecting Several Audio Sources
3.8 Connecting several audio sources. Using the bhi 1042 Switch Box it is possible to connect up to six separate audio sources to one NEIM1031. The 1042 switch box has 3 loaded inputs (for an extension speaker socket) and 3 unloaded for headphone socket connections. -
Page 13: Controls
Controls. 4.1 Control layout. The NEIM1031 Controls are identified in the following diagram and described on the following page. Input Selector Switch Audio Line Line Audio Input Level LEDs Connections Input Selector Input Level NEIM1031 12-24VDC Input Control Overload Filter Level Power On/Off Selector Input Level... -
Page 14: Control Functions
4.2 Control functions: Input Selector Switch: Selects between line level input (phono connector) and high level input (jack socket). Both inputs may be connected at the same time. Only the selected input will be passed through the DSP circuit. Filter Level Selector Switch: The 8 position rotary switch selects the amount of DSP processing. - Page 15 Power On/Off Switch: Applies power to the NEIM1031. Switching off removes power to the circuit and connects all inputs to outputs. With the power off the line in connects to line out and audio in connects to audio out - with no amplification. This allows the unit to remain connected in circuit, even when it is not in use.
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Page 16: Setup
Setup. 5.1 Signal Levels. Turn the input level, output level and line out level controls to the minimum - fully anticlockwise. Connect to the equipment to suit your application as shown in section 3. Switch off the NEIM1031, all signals will be connected straight through the unit. - Page 17 Care must be taken to avoid excessive signal levels, as they may result in damage to hearing or equipment. bhi Ltd does not accept responsibility for damage to equipment or hearing however caused.
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Page 18: Troubleshooting/Faqs
Troubleshooting/FAQs No audio output from extension speaker. Check the input selector switch is set to the correct input. Check the input level is correct , ie the green input LED is illuminated. Check output level. The noise cancellation does not appear to improve the quality of the audio signal. -
Page 19: Specifications
Specifications. Noise attenuation: 9 - 35dB Noise attenuation levels Level Attenuation 11dB 13dB 15dB 17dB 20dB 24dB 35dB Tone rejection 65dB max Audio output power 2.5W RMS max. Audio bandwidth 50Hz - 4.6KHz (-3dB) Audio connections: Line level in/out RCA phono Audio in/out 3.5mm mono jack Line input impedance... - Page 20 DC power: 12-24 VDC 500mA DC connector: 2.1mm power connector (centre +ve) Size: 170 x 85 x 34mm Weight: 265 gms Page 20...
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Page 21: Accessories
Accessories 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 rear cover for contact details). 8.1 Power: 1030-UKPA UK mains power adaptor 1030-EUPA... -
Page 22: Audio Adaptors
8.3 Adaptors for connecting NEIM1031 to other equipment. ) " ) " 8.4 Adaptors for connecting earphones/head phones to NEIM1031. ) " ) " Page 22... -
Page 23: Bhi Support
Support Notes: Every NEIM1031 noise eliminating module comes with a 12 month guarantee against defective materials and workmanship. If you do have a problem then please refer to the troubleshooting guide (section 6). If you have not resolved your problem then please contact us. - Page 24 Ltd PO Box 136 Bexhill on Sea TN39 3WD Telephone : + 44 (0)870 2407258 Fax: + 44 (0)870 2407259 email: info@bhinstrumentation.co.uk web: www.bhinstrumentation.co.uk Page 24...
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