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The selected noise cancellation level can be seen in the
small cutout on the switch knob.

Starting at level 0 switch the noise cancellation on, listen
to a typical noisy signal. Adjust the level of noise
cancellation to suit.

Note:
The higher levels of noise cancellation will remove
virtually all the background noise, but the user will note
the following possible effects if high levels of background
noise are present.

n

Voice has a slightly robotic sound.

n

Background noise becomes a watery sound.

Switching off the noise cancellation will restore the audio
to its original form.

If there is a lot of noise present on the audio signal it
may be necessary to increase the output volume (or line
level out) with the noise cancellation on.

Note:
Please note that if the volume is increased and the noise
cancellation (or power) is switched off the resulting
unprocessed signal will be at a higher level. 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.

Summary of Contents for NEIM 1031

Page 1: ...NEIM1031 Overload Output Level Input Level Line Out Level Noise Eliminating In Line Module 4 2 3 1 Power 5 6 Off On OK 2 1 3 4 5 6 Out Audio Headphone Socket Noise Cancellation 9 8 Filter Level On bhi...

Page 2: ...otice 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 Furt...

Page 3: ...ion 9 3 6 Surveillance CCTV Video 10 3 7 Recording using a PC sound card 11 3 8 Connecting several audio sources 12 4 Controls 13 4 1 Control layout 13 4 2 Control functions 14 5 Setup 16 5 1 Signal l...

Page 4: ...nterference The module has connections for high and low level audio signals The unit is designed to be easily connected into the audio path of noisy signals where the intelligibility and clarity of sp...

Page 5: ...e connectors 3 1 Connector Description Line In Phono socket Low level audio input Audio In 3 5mm mono jack socket Speaker level input for example an extension speaker socket DC Power 2 1mm power conne...

Page 6: ...ut Audio Headphone Socket Noise Cancellation 9 8 Filter Level On bhi 0 MIN 9 8 7 MAX 12 24VDC Input Input Selector Audio Line In Line Audio In Line In Audio out Line out 3 2 Connector Layout DC Power...

Page 7: ...el Line Out Level Output Level Power Noise Eliminating In Line M Headphone Socket Connections Input Selector Out Audio Line In Audio Line bhi On Off Filter Level 0 MIN 7 MAX On Noise Cancellation 12 2...

Page 8: ...l 0 MIN 7 MAX On Noise Cancellation 12 24VDC Input 0 NEIM1031 1 2 3 4 Radio communications The following pages show typical applications and connections to the NEIM1031 For connection of headphones or...

Page 9: ...On Off Filter Level 0 MIN 7 MAX On Noise Cancellation 12 24VDC Input 0 NEIM1031 1 2 3 5 Audio restoration Connect the audio source and recording device as shown If the source is monaural one channel m...

Page 10: ...gnal can be recorded and the cleaned audio is monitored using headphones or an extension speaker This will record a true copy of the CCTV footage The unit can then be used on playback to remove any no...

Page 11: ...MAX On Noise Cancellation 12 24VDC Input 0 NEIM1031 1 2 14 2000 000 14 195 00 3 7 Recording using a PC sound card PC Sound Card Audio Source Line In Line Out The sound capturing capability of the PC...

Page 12: ...14 2000 000 14 195 00 14 2000 000 14 195 00 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 switc...

Page 13: ...1031 Overload Output Level Input Level Line Out Level Noise Eliminating In Line Module 4 2 3 1 Power 5 6 Off On OK 2 1 3 4 5 6 Out Audio Headphone Socket Noise Cancellation 9 8 Filter Level On bhi 0 M...

Page 14: ...evel 0 is the minimum and level 7 the maximum The selected level can be seen in the small cutout in the switch knob Noise Cancellation LED Indicates if noise cancellation is on off Noise Cancellation...

Page 15: ...will bypass allowing continuation of signal Power On Off LED Indicates power on off Output Volume Control Adjusts the volume of the audio signal present at the audio out and headphone sockets This do...

Page 16: ...sed then set the level to a comfortable listening level Ensure noise cancellation is switched off and the input selector switch set to the input being used Adjust the input level control on the NEIM10...

Page 17: ...robotic sound n Background noise becomes a watery sound Switching off the noise cancellation will restore the audio to its original form If there is a lot of noise present on the audio signal it may...

Page 18: ...the level of noise cancellation n Check the green power on off LED is illuminated Sometimes there is a short delay before the noise cancellation is active n This is due to the time the DSP takes to st...

Page 19: ...20dB 7 24dB 8 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 impeda...

Page 20: ...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 21: ...wer 1030 UKPA UK mains power adaptor 1030 EUPA European power adaptor 1030 VEPL Vehicle power adaptor 1030 2WVA 2 Way vehicle power adaptor 8 2 Audio 1030 MOEP Mono earpiece 1030 STHDP Stereo headphon...

Page 22: ...d a R r o t c e n n o c d e r i u q e r r o t p a d A r e b m u N r e d r O 4 1 m m 5 3 6 t e k c o s o n o m t e k c o s o n o m m m 5 3 g u l p o n o m m m 5 3 6 1 0 0 P P D A 4 1 m m 5 3 6 t e k c...

Page 23: ...031 Details of when and where you purchased the module See our website for FAQs otherwise most queries can be resolved over the telephone if not we will arrange with you to have your NEIM1031 sent bac...

Page 24: ...Page 24 bhi bhi 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 SOUND ENGINEERING SOLUTIONS...

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