Extron electronics VNM EC 200, Руководство пользователя, Страница: 80 / 242

Program Audio
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Figure 52. Program Audio, Analog Audio Input and Return Audio Panels
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Input Select:
Selects the input audio source. HDMI audio is not supported if RGB (2)
input video is selected.
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HDMI (1) : Selects the embedded HDMI audio.
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Analog (2) : Selects the rear panel analog audio input.
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Disable : Mutes all audio inputs.
2
Audio Status: Read-only field that displays the sampling rate of the selected audio
source.
Analog Audio Input
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Peak Input Level (dBu): Optimize Signal to Noise Ratio (SNR) prior to the Analog to
Digital Conversion (ADC) process. Set the Peak Input Level to a value just above
the highest level of the source audio material. For example, if the input level from the
source material peaks at +3 dBu, the
Peak Input Level is set to +4 dBu.
The range is -26 to +12 dBu. Default: +4 dBu.
4
Measured Input Level (dBu): This field shows the current measured input level of the
analog input source in dBu. The value is updated every second and can be used as a
guide to determine the
Peak Input Level (see above) of the source material.
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When the measured input level exceeds the specified peak input level, the Clip
warning indicator glows red. When the input level falls back within range, the warning
indicator remains lit for three seconds and then turns off.
Return Audio
Return Audio
controls the audio level for audio received from a decoder. Only one
decoder receiving an audio stream from an encoder can send return audio to the
source or connected audio device. Only analog audio is supported for return audio.
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Mute Audio : Mutes the return audio.
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Output Level (dBu) : Only available when a connection is made to a decoder. Adjust
the audio level of the rear panel return audio output.
The range is -70 to +12 dBu. Default: +4 dBu.
VNM EC 200 • Device Configuration and Control 70