Gain / Level Optimization - Lab.gruppen PLM Series PLM 10000Q Quick Start Manual

setting is derived from the LoadLibrary fingerprint
data within the PLM preset. as such, it should not
need to be adjusted further. (adjust in i/o Config,
module pane.)
Attenuator
one adjustment is provided per output channel in
the PLM. this control replaces the traditional knob
found on conventional amplifiers. it should typically
be left at 0 dB during use. (adjust in Lab.gruppen
info, Status tab)
Amp Gain
Corresponds to the gain that you would
have available in a conventional system if
the amplifier section was outside the PLM.
it should retain the same settings as in the mod-
ule file that is loaded. the limiter and output gain
settings in the output stage of the module
were configured with this gain setting and will
not be automatically compensated if changes
are made. this configuration scheme, though unusual,
allows for backwards compatibility with other Dolby
products. (Set in Lab.gruppen info, Control tab.)
Figure 6.5: PLM Signal Flow Diagram (Part 2)
4
Module Output:
Gain/Level
LimiterMax
Phase Rev RMS / Peak
Mute
Module Output:
Gain/Level
LimiterMax
RMS / Peak
Phase Rev
Mute
Module Output:
Gain/Level
LimiterMax
Phase Rev RMS / Peak
Mute
Module Output:
Gain/Level
LimiterMax
Phase Rev
RMS / Peak
Mute

6.6 Gain / Level Optimization

Optimum setting of the pLM gain structure
requires particular attention to two matters:
Make sure it can get loud enough.
to do this, the user should ensure that there is suf-
ficient headroom in the signal path to avoid clipping
before you reach the limiters. at the same time, it
must be possible to achieve enough gain through the
PLM to engage the limiters and realize a high average
SPL as a consequence. as an optimal setting, allow
for a headroom of 10 dB or more for all channels. the
simplest way to accomplish this is to increase the input
gain on the module.
Minimize the noise.
as a first step, use a digital input signal (aES or Dante)
when possible. if using analog inputs, ensure that
headroom is not introduced on the input side that
is unused or unreasonably high. if full power is not
required, or at least not a high average power, you may
also lower the gain on the input of the module.
5
Attenuator
Mute ISVPL
Phase Rev
Attenuator
Mute ISVPL
Phase Rev
Attenuator
Mute ISVPL
Phase Rev
Attenuator
Mute ISVPL
Phase Rev
PLM Series Quick Start and Field Reference Guide 15
QUICK sTArT TUTOrIAl 6
6
LoadSmart
Amp Gain
SpeakerSafe
LoadSmart
Amp Gain
SpeakerSafe
LoadSmart
Amp Gain
SpeakerSafe
LoadSmart
Amp Gain
SpeakerSafe
AMP
AMP
AMP
AMP