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8 Embedded Web Server
The ‘Signal Level’ can be set to either ‘Mic’ or ‘Line’. Selecting ‘Mic’ displays
the options for ‘Phantom Power’ and ‘Preamp Gain’ whereas selecting
‘Line’ displays the ‘Audio Line Up’ option. When an input is set to mic level a
icon will be shown next to the input name.
Each of the devices inputs supports ‘Phantom Power’ this can be enabled
or disabled using the dropdown menu. When Phantom power is enabled a
+48V DC supply is provided to the microphone, some microphones require
this to power any active electronic circuitry they contain. When phantom
power is enabled, the icon will be coloured green.
The user can add from 0 to 60 dB of gain to the microphone input by
pressing the ‘+’ and ‘-’ buttons or manually entering a value into the
‘Preamp Gain’ input field.
The line-up level can be set under the ‘Audio Line Up’ dropdown menu. This
determines the analogue audio level that is equal the 0dBFS full scale digital
value. This can be set to either 15, 18, 20, 22, or 24 dBu. The audio line-up
level will depend on the minimum and maximum audio levels that need to
be provided, this will vary depending on the standard used geographically.
AVN-PD8, AVN-PD8D, AVN-PD8T and AVN-PD8TD
Fig 8-26: ‘General’ Tab of the ‘Configure Physical Input’ Window on the AVN-PD8