BHI ANEM, Installation And Operating Manual

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ANEM Operating Manual ANEM Operating Manual
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3. Module Operation.
3.1 Keyboard.
The keyboard has 2 buttons and a tricolour LED.
3.1.1 Power button.
The power button switches the module on and off. When
the module is off, the audio bypasses the module, so
the circuit will behave as if the module isn’t present.
Switching the power on routes the audio through the
module.
Note: If the power is on and the DSP is switched off, the
audio still passes through the DSP - but without any signal
processing.
A single press on the button switches the power on, and a
single press will switch it off. Also with the power connected
and the module switched off the circuit will draw 6mA.
3.1.2 DSP level button.
This button is used to set the following:
• DSP on/off
•
DSP level
• 4 or 8 levels of noise cancellation
• Demonstration modes
Power on/off
bypass button
DSP function
button
DSP function LED
3.
Module Operation.
Figure 6. Controls
Page 20
4.3 Module setup.
4.
Technical Information.
To obtain the best results from the noise reduction the
module should be set up to give optimum performance.
The input sensitivity control has a range of 0.70mW -
3W to provide 2W (
W
)output.
Under certain conditions, RF breakthrough can
sometimes occur. To minimize this, the input level (P2)
may need to be reduced or go to the FAQ page on the
bhi website and download the FAQ on RF breakthrough.
Under certain conditions the DSP can create a small
amount of noise, you should not be able to hear this
noise when a signal is applied to the module.
4.3.1 Overview.
The module is factory set but both the input and output levels
are adjustable on the module. This allows easy integration
into target systems. If you need to adjust the module follow
the instructions below.
Basic adjustment procedure.
„ Open the unit by carefully pulling both sides of the
bottom half outwards & easing the top half upwards.
„ Ensure that the pcb is clear for any adjustments.
„ Connect input source and output device.
„ Ensure the ANEM is switched off.
„ Set the audio source to a typical audio level.
„ Switch on the ANEM .
„ Adjust the input control (P2) until the overload LED
illuminates. Reduce the level by approx. 1/4 turn.
„ Adjust the output level (P1) to the desired level.
„ Hold down the DSP button and adjust the volume
of the sounder to suit using P3.
4.3.2 Suggested adjustment procedure:
SP
Speaker/
Headphone switch