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33
PAM1 MK2
User Handbook Issue 1
2.14.8
Signal Conditional UnMute
The
PAM1
is designed to protect the operator and his/her loudspeaker equipment against
unexpected or hostile audio. It performs this task by monitoring the data contained within signal
SMPTE headers and ancillary data which is compared to the audio signal.
Example:
A PCM audio signal embedded within SDI may be accompanied by a SMPTE header
declaring that it is data and not audio. Although the signal will be present on the
PAM1
bargraphs
it will be reported within the data information fields as
Data
and the loudspeakers will be muted by
default as a defence mechanism to protect against damage to hardware and hearing.
2.14.9
Un-
Mute a PCM signal identified as ‘Data’
The button labelled
UnMute
provides a means to override the default speaker muting system
designed to protect against hostile or unexpected audio signal conditions.
Use the encoder to select the
UnMute
button and push / turn to select
Data.
This will override the
default speaker muting condition temporarily
:
the condition can be assigned to a user preset or
Hotkey
using the
User Preset Save
procedure described elsewhere in this handbook.
2.14.10
Un-
Mute a Dolby signal identified as ‘Data’
If a Dolby encoded signal is not identified as
Dolby
correctly or if there is unexpected header
information then
PAM1
will mute by default. To override this condition please follow the
procedure outlined previously and select
Dolby.
Save this condition as a preset or Hotkey.
2.14.11
Override All conditional muting
Both Data and Dolby default mute conditions can be activated simultaneously by selecting
ALL
using the
UnMute
button. As previously described this selection must be saved to a preset or
Hotkey for it to become a permanent state of operation.
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