bhi DESKTOP Amplified DSP noise cancelling base station speaker User Manual bhi Ltd DSP noise cancellation products for radio and voice communications 2067 Manual iss B
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2. Introduction The bhi DESKTOP speaker is a microprocessor controlled amplified DSP noise cancelling base station speaker that removes noise and interference to improve the quality of speech in noisy radio and voice communications. It is suitable for use in base station applications where background noise and interference mean that you cannot clearly hear what is being said. The speaker will enable the user to listen and concentrate “stress-free”.
. Installation The speaker is supplied with a mounting bracket that can be left on in case of permanent fixing, or removed altogether depending on personal choice. Connections to your radio equipment can be made via audio sockets on the rear of the speaker, using either the speaker level terminals (audio lead supplied), or the 3.5mm stereo line level socket (audio lead not supplied). Set the volume on your radio or audio source to the normal listening level prior to using the DESKTOP speaker.
through the speaker now. Turning the “Volume” control clockwise or anticlockwise will increase or decrease the volume level. Subsequent presses of the “Volume” control will turn the speaker on and off. When switching back on the speaker will go to the last stored setting when switched off. Pressing the filter control knob switches the DSP noise cancelling filter on and off, the red LED indicates filter off, and the green LED filter on (in filter scrolling mode).
9. Specification DC Power Connector type Input voltage Input current Line Level Audio Input Connector type Input voltage range Input impedance 2.1mm DC power jack (centre positive) 12 to 18 Volts DC 10mA standby (typical) 125mA active (no signal) 2.5A peak 3.5mm Mono or Stereo line level 160mV to 1.6mV pk-pk 10kΩ (±2kΩ) nominal Speaker Level Audio Input Connector type 2 x 4mm socket/screw binding posts (mono) Input voltage range 350mV to 3.5V pk-pk Input impedance 8Ω (±2Ω) nominal Input power rating 1.
10. Troubleshooting/FAQs Speaker doesn’t work at all, no sound from the speaker: • Check that the power connector on your power supply is suitable for the power socket on the speaker (2.1mm, centre positive). • Check that you have switched your radio communication equipment on and that you have a signal for the speaker to process. To verify this, remove the audio connector from the external speaker socket on your equipment. • Check that the DESKTOP Power LED is on.
Weee Statement for correct disposal of this product: (Applicable in the European Union and other European countries with separate collection systems). This marking shown on the product or its literature, indicates that it should not be disposed of with other household wastes at the end of its working life.
