Lab.gruppen PLM series Quick Start Manual

Also see for PLM 10000Q: Supplementary guide User manual addendum Specifications Quick start Technical data

Lab.gruppen PLM series Quick Start Manual Manual pdf 20 page image

20 PLM Series Quick Start and Field Reference Guide rev 1.0.66. Quick Start Tutorialsettings in the output stage of the module were configured with this gain setting and will not be automati-cally compensated if changes are made. This configuration scheme, though unusual, allows for backwardscompatibility with other Dolby products. (Set in Lab.gruppen Info, Control tab.)6.6 Gain / Level OptimizationOptimum 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 sufficient headroom in the signal path to avoid clippingbefore you reach the limiters. At the same time, it must be possible to achieve enough gain through thePLM to engage the limiters and realize a high average SPL as a consequence. As an optimal setting, allowfor a headroom of 10 dB or more for all channels. The simplest way to accomplish this is to increase theinput 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 thatheadroom is not introduced on the input side that is unused or unreasonably high. If full power is notrequired, or at least not a high average power, you may also lower the gain on the input of the module.Figure 6.5: PLM Signal Flow Diagram (Part 1)InputRouter1(Mute)InputRouter2(Mute)InputMixer AInputMixer BEQ DelayEQ DelayCrossoversModule:GainPhase RevMuteAnalog 1/2AES 1AES 2Dante XDante YAnalog 1/2AES 1AES 2Dante XDante YModule:GainPhase RevMuteOutput EQModule Output:Gain/LevelPhase RevMuteOutput EQModule Output:Gain/LevelPhase RevMuteOutput EQModule Output:Gain/LevelPhase RevMuteOutput EQModule Output:Gain/LevelPhase RevMuteOutput EQModule Output:Gain/LevelPhase RevMuteOutput EQModule Output:Gain/LevelPhase RevMute412 312 3