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AM-10HD / Aug 2008
A M - 1 0 H D G U I
INPUT MENU
Input Settings
This is the first tab on the top far left of the GUI. (Note: the screen that is cur
‑
rently being displayed is indicated by a green background on the selection tab).
The Input screen contains controls for the input source selection, Input Failsafe,
Analog and AES/EBU input gain controls, input L/R gain balance, Phase Rotator,
and the high pass filters, which may be operated in Stereo or Sum/Difference mode.
Input Source
The Input Source can be selected as either Analog, which is the analog Left/
Right input, or AES, which is the AES3 digital audio input.
The currently selected input is shown by a red checkmark.
Input Signal Presence
Below the source selection checkboxes are a pair of signal presence indicators.
The Line indicator lights if there is a signal present at the analog input that exceeds
the threshold of ‑48dBFS. The AES indicator lights if there is a valid AES signal
present at the digital input that is above ‑48dBFS.
Input Failsafe
In the event the currently selected input source fails and the “Failsafe” check box
is checked, an alternate source of audio connected to the other input can automati‑
cally be put on the air.
If the primary source was AES/EBU (digital), the analog input will be selected
immediately if the AES3 receiver chip detects invalid bits in the AES data
stream or missing audio data. Also, the input will “fail over” to the analog
input after 30 seconds of a valid AES data stream having a signal level below
‑48dBFS.
If the primary source was analog, then a silence sense timeout of 30 seconds
must elapse before the unit switches to the digital input in an attempt to re‑
store audio. The audio failure sense threshold is fixed at ‑48dBFS, a value
which is suitable for virtually all program types.
Input Screen
