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Page 5 

 

6.1. 

Storing and un-storing a selected level of noise cancelling 

 
Once a suitable filter level has been selected, this level can be stored.  This is achieved by 
pressing the FUNCTION button for a few seconds.  The unit will respond with a tone and 
the STATUS indicator will turn Green.  Having stored a desired level, brief presses of the 
FUNCTION button will now cause the unit to cycle between noise cancelling OFF 
(STATUS Indicator – RED) and noise cancelling ON at the saved level (STATUS Indicator 
– GREEN).  To un-store the saved level, press and hold the FUNCTION Key again until 
the unit emits a tone. The STATUS indicator will change back to Orange and the unit will 
now cycle through the various levels of noise cancelling.  

Note:

  It is advisable not to drive 

a vehicle and change the filter level at the same time. 
 

Note:   

Higher levels of noise cancellation will remove virtually all the background noise, but the 
user will note that the audio may be slightly distorted if high levels of background noise are 
present.  Switching off the noise cancellation will restore the audio.  If there is a lot of noise 
present on the audio signal it may be necessary to increase the output volume when 
listening with the noise cancellation switched on, once the noise has been removed. 

 

If the 

volume is increased and the noise

 

cancellation is then switched off, the resulting

 

unprocessed signal will be at a higher level.  Care must

 

be taken to avoid excessive signal 

levels to avoid possible damage to your hearing or equipment. bhi Ltd does not accept 
responsibility for damage to equipment or hearing however caused. 

 

7. 

Sleep mode 

 
With power applied to the speaker it can be manually put to into sleep mode by pressing 
and holding the FUNCTION button for approximately 6 seconds.  You will firstly hear a low 
tone then after approximately six seconds a high tone, releasing the button after this will 
leave the speaker in sleep mode.  The unit consumes very little current (3mA) and the 
STATUS indicator flashes red every 15 seconds to show that it is still powered. 
 

7.1. 

Waking the unit up 

 
To wake the unit up, simply press the FUNCTION button momentarily and the unit will start 
to operate in the last mode it was set to. 
 

7.2. 

Auto sleep function 

 

If the unit fails to see any audio above the minimum required level for greater than 30 
minutes, the unit will place itself into Sleep mode.  The unit consumes very little current 
(3mA) and the STATUS indicator flashes red every 15 seconds to show that it is still 
powered.  To wake the unit up, press the FUNCTION button and the audio will be 
restored. 
 

8. 

Specifications 

 

DC Power 

DC input voltage 

 

10 to 16 Volts DC. 

Current 

 

  2 

Amps 

maximum 

Protection 

Over current and reverse polarity protected 

Содержание DSPKR

Страница 1: ...DSPKR 10 Watt RMS Amplified DSP noise cancelling Speaker User Manual bhi Ltd DSP noise cancellation products for radio and voice communications 1072 105D Iss B...

Страница 2: ...ally disclaims any implied warranties of merchantability or fitness for any particular purpose Furthermore bhi Ltd reserves the right to revise this publication and to make changes from time to time i...

Страница 3: ...ide frequency range 4 speaker and an audio amplifier capable of producing up to 10 Watts RMS audio power with built in bhi DSP noise cancelling filter The unit requires an audio input signal of betwee...

Страница 4: ...but not flashing rapidly If the AUDIO LEVEL indicator flashes rapidly the audio input level is too high and audio distortion may occur 6 Noise Cancellation The DSPKR STATUS indicator will initially sh...

Страница 5: ...been removed If the volume is increased and the noise cancellation is then switched off the resulting unprocessed signal will be at a higher level Care must be taken to avoid excessive signal levels t...

Страница 6: ...g green The speaker works but the noise cancellation doesn t appear to improve the audio quality of the signal Check the filter is switched on and increase the level to see if this makes any differenc...

Страница 7: ...o other common questions otherwise most queries can be resolved over the telephone or via email If not we will arrange with you to have your unit sent back to us for analysis repair or replacement if...

Страница 8: ...Page 8 bhi Ltd PO Box 318 Burgess Hill West Sussex RH15 9NR England Telephone 44 0 845 217 9926 Fax 44 0 845 217 9936 Email sales bhi ltd com Web www bhi ltd com 1072 105D iss B...

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