FOR-A FA-9500 Operation Manual page 138

Parameter Default
CORRECTION NORMAL
*1 Channel status and audio channel (input) Validity Bit can be checked using a wave form monitor.
*2 Processes audio signals as described if SRC MODE in the 6-5-1 SOURCE/SRC SEL menu is set to
AUTO.
*3 Processes audio signals as described if SDI AUDIO CLOCK in section 6-1-4 is set to AUTO.
*4 Fade function depends on the FADE MODE setting in the 6-10-1 FADE IN/OUT menu.
 CH STATUS
The FA-9500 determins whether the input audio signal is PCM or not from the NON-PCM flag
carried in the Audio Channel Status (ACS). If ACS is incorrect it may lead to improper
processing. This setting may effective processing such audio signals with incorrect ACS
properly.
 VALIDITY
The FA-9500 determines whether the input audio signal is PCM or not using Validity Bits (V
Bit) in audio signal. If Validity Bit (V Bit) is incorrect the audio signal may cause improper
processing. This setting may effective processing such audio signals with incorrect Validy Bits
properly.
Please use these settings only if there is audio noise or the audio is muted. Otherwise,
do not change the default setting.
 CORRECTION
Normally set to NORMAL. Set to DISABLE for a specific program or duration when audio
output has noise or is muted.
The FA-9500 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-9500's automatic correction to
improperly process the audio input and produce noise or mute the audio.
Note that disableing 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 6-1-5. "SDI IN AUDIO" ALIGNMENT setting from DISABLE to ENABLE.
(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
FA-9500 can fade
it 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
DISABLE change in audio status is detected.
Normally not selected.
NORMAL
NORMAL: Mutes when a change on an
SENSITIVE
SDI 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.
IMPORTANT
122
Description
*4
and mute audio when