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Peak Digital Input Meters |
Peak digital input level in dB (23 dB equals full-scale digital input). |
Analog Clip |
Lit (red) when the input signal is clipped. This occurs when the signal level exceeds the maximum analog sine input level plus 3dB. |
Phantom Power |
Enables the phantom power feature which supplies power to a microphone via the audio cables attached to the device. This feature is used for condenser microphones. Note: Check the power requirements of microphones, before connecting them to the NION. |
Maximum Analog Sine Input Level |
The maximum expected analog RMS input level for the channel. The peak level is 3dB higher. This control scales the analog input section before the signal is passed to the analog to digital converter. Use it to adjust the sensitivity of the input stage so that the meter display moves across its full range and not just in a small area. The range is dependent on the type of card you are using. |
Mute |
Mutes the channel. |
Invert |
Inverts the polarity of the signal. |
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Solo. Specifies that the channel is to remain open while all others are muted. Any other channel with Solo on will also remain open. |
Digital Gain |
The level of gain to be applied to digital signal inside the unit. The signal has already been converted from analog to digital by the A/D converter. The range is to -100dB to 18dB. |
AEC Enable |
Switches on echo cancellation for the channel. |
Acoustic Echo Cancellation Setup (double-click to display settings) |
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AEC Input |
Level meter for input to AEC card from near end (microphone) containing echo. |
AEC Ref |
Level meter for input to AEC card from far end (microphone). |
Echo Atten. |
Echo attenuation level (echo return loss enhancement (ERLE)). |
AEC Out |
Level meter for output from AEC card with the echo removed. |
AEC Enable |
Switches on echo cancellation for the channel. |
Adaption Halt |
Disables the adaption filter for the channel. If you disable the adaption filter, this will prevent any further tuning of the echo cancellation system for the channel. You may want to disable the filter as soon as the system is found to be working as required and you do not expect any further changes that might affect its operation, such as microphone positioning, for example. When enabled, the filter will continually tune the echo cancellation system using the reference signal from the far end (AEC Ref) and the input signal from the near end (AEC input). |
NLP Enable |
Switches on the non-linear processing stage of the AEC system for a channel. |
NLP Threshold |
Specifies the threshold for an Expander device wired to the AEC Out signal. For more information, see Threshold Level (for Expander device) in the NWare Device Reference. |
Echo Detect |
Lit (green) when an echo is found in the audio signal sent to the AEC card. |
Echo Path Change |
Lit (green) when the AEC system is converging. |
AEC input clipping |
Lit (red) when the input level from the near end reaches an internally set threshold and is automatically clipped. Note: When clipping occurs, AEC performance will be impaired. |
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See also |
