Overview

bhi DSP Devices

bhi Compact In-Line Modules measure just 125 x 70 x 37 mm, and are the latest addition to bhi's range of DSP noise cancelling products.

These small, battery operated handheld units are ideal for portable use, and include the latest bhi dual channel / stereo DSP noise cancelling technology. They are designed to be used with a pair of stereo headphones, but will also drive a monaural speaker or a pair of powered stereo speakers.

These compact in-line modules are powered by two AA alkaline or NiMH batteries, or can be powered from a separate DC supply (power cable supplied). The module’s functions are microprocessor controlled and can accept mono or stereo signals. They have separate speaker level and line level inputs with two separate rotary encoder controls with pushbutton action for filter level select, power on/off, volume control and stereo/mono signal selection. Simply adjust the controls to suit your current noisy conditions. These modules are suitable for use on all radios and receivers including software defined radios (SDR).

bhi Compact In-Line Module features:

* Compact handheld battery operated DSP noise cancelling module
* New improved stereo / dual channel noise cancelling algorithm
* Processed speech is clearer and more intelligible
* Easy to use controls for all functions
* Use with mono, stereo or two separate audio channel inputs
* Ideal for portable use, DXing, and special event stations
* Use with headphones or a speaker
* Over 40 hours of battery life with two AA alkaline or AA NiMH batteries

Specifications:

* External supply: 8 to 16V (nominally 30mA, max 350mA peak) Reverse polarity protected
* Internal batteries: AA cell x 2 (Alkaline or NiMH recommended) Reverse polarity protected
* Low battery indication threshold: 2.1V plus/minus 0.1V
* Low battery indication: LED color changes to red
* Battery Life: 40 hours typical (Alkaline or 2500mAH NiMH)
* Auto power-off: 60 minutes if input signal is less than 60mVpk-pk Auto power-off can be disabled if desired

* Speaker-level input: Stereo or Mono
* Input Impedance: 7 Ohms, nominal
* Maximum allowable input power: 2 Watts RMS per channel
* Maximum input amplitude: 3.9Vpk-pk

* Line-level input: Stereo or Mono
* Impedance: 6.7k Ohms typical
* Maximum input amplitude: 1.6Vpk-pk
* Overload indication: LED flashes for at least 3 seconds

* Phones out: Stereo or Mono
* Impedance: Less than 4 Ohms (Can also be used as Line Level output)
* Max power output: 0.2 Watts RMS per channel
* Volume levels: 16 levels in 3dB steps

DSP Noise Filtering
* Modes: Enabled / Disabled (0dB suppression)
* Levels: 8
* Noise suppression: 8 to 40dB

* Size: 4.92 x 2.75 x 1.45 in.
* Unit weight: 4.4 oz.

Documentation