Setting The Audio Over Duration; Detecting Audio Silence Faults; Setting The Audio Silence Level; Setting The Audio Silence Duration - evertz 7700 Manual

7.7.4.2. Setting the Audio Over Duration

Fault definitions
Over duration
3 to 255 SAMPLES
3

7.7.5. Detecting Audio Silence Faults

The Silence level and Silence duration controls are used to detect when the audio is considered to be
silent. The Silence level control sets the audio level under which the audio is considered to be silent. The
audio must be under the Silence level for the duration set by the Silence duration control before the fault
condition exists. When the fault condition exists, the audio must be over the Silence level for the duration
set by the Silence duration control before the fault condition will be removed. A fault will be generated
when both channels in a pair (1 and 2 or 3 and 4) has satisfied a silence condition.

7.7.5.1. Setting the Audio Silence Level

Fault definitions
Silence level
-96dB to –20dB FS
-60dB FS

7.7.5.2. Setting the Audio Silence Duration

Fault definitions
Silence duration
0.5 to 127 sec
10 sec

7.7.6. Detecting Audio Phase Reversal Faults

All stereo audio material has a varying amount of phase difference between the two channels. If there is
significant phase reversal for a period of time, then this is a sign that the audio signals may be out of
phase.
The Phase reversal level and Phase reversal duration controls are used to detect when the left and right
audio channels are considered to be out of phase. The Phase reversal level control sets the amount of
phase difference that is considered to be out of phase. The audio must be out of phase by more than the
Phase reversal level amount for the duration set by the Phase reversal duration control before the fault
condition exists. When the fault condition is active, the audio must be out of phase by less than the Phase
reversal level amount for the duration set by the Phase reversal duration control before the fault condition
will be removed.
7735AVC-LB Video Composite Encoder and Audio DAC with SoftSwitch
This control sets the duration, in number of consecutive samples that are
at or above the Over level before a fault condition exists.
Note that as longer durations are configured, the user is eliminating the
detection of higher frequency content over the set Over level.
This control sets the audio level under which it is considered to be silent.
This value is expressed in dB full scale (FS).
This control sets the amount of time the audio is silent in seconds before
a fault occurs.
Revision 1.6
7700 MultiFrame Manual
7735AVC-LB - 29