FOR-A FA-9520 Operation Manual page 206

 Digital Audio Silence Setting
Parameter Default
Silence Detect
2sec
Time
Silence Level -72dBFS
*1 According to this setting, the audio status Silence is displayed in the Audio Status page
(9-7-2).
 Audio Error Sense
Parameter Default
Correction Normal
*1 Fade function depends on the Fade Mode setting in the Fade In/Out menu.
 Correction
Normally set to Normal. Set to Disable for a specific program or duration when audio output
has noise or is muted.
The FA-9520 fades out audio or resets the delay circuit when a status change (SDI signal
input interruption, signal switchover (by a router, etc.) is detected. Faulty ancillary data in
normal audio signals may also be detected as status changes.
Audio signals with such faulty ancillary data may lead the FA-9520's automatic correction to
improperly process the audio input and produce noise or mute the audio.
Note that disabling the automatic correction can prevent such improper processing, however,
the following functions will also be disabled.
- After a signal switchover by router or the recovery of an interrupted SDI signal, delay
settings will lose their accuracy to within 1.3 msec max. Audio signal phases among audio
groups will not match.
Perform either of the following operations when setting Correction to Disable, or changing the
setting from Disable to Normal.
(a) Change the Alignment setting from Disable to Enable under SDI Input Audio in 9-4-2.
"Audio System".
(b) Disconnect and reinput the SDI input signal.
These operations reset the audio circuit and minimize the delay differences and group audio
phase differences. Output audio signals will be muted while performing the operations.
Setting range
Sets the duration to determine the SDI
1 – 10sec
embedded audio and AES input signals are
silent.
-72dBFS
-66dBFS Sets the audio level to determine the SDI
-60dBFS embedded audio and AES input signals are
-54dBFS silent.
-48dBFS
Setting range
FA-9520 can fade
detects a change in the audio status due to,
e.g., signal switchover. This parameter allows
you to select whether to detect changes and
how sensitive detection should be to such
changes.
Disable: Disables mute function when change
in audio status is detected. Normally not
Disable
selected.
Normal
Normal: Mutes when a change on an SDI
Sensitive
signal, ADP (Audio Data Packet), or DBN
(Data Block Number) is detected.
Normally selected.
Sensitive: Mutes when a change on channel
status, or EDP (Extended Data Packet)
presence (only for SD-SDI), as well as the
above items, is detected.
206
Description
Description
*1
and mute audio when it