Lab.gruppen PLM 20K44 Operation Manual

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Lab.gruppen PLM 20K44 Operation Manual Manual pdf 26 page image

6. Signal Flow and Lake® Processing26PLM+ SERIES Operation Manual rev 1.0.06.2.1. Power Output Section: Limiting and SensitivityThe Current Peak Limiter (CPL) dynamically limits the drive to the power stage based on three parameters: sensedoutput current level, feedback from the output stage, and sensed voltage clip from the ISVPL. This ensures thatpower output is maintained within the design limits of the PLM+.The adjustable Inter-Sample Voltage Peak Limiter (ISVPL) sets the PLM+’s maximum output voltage and thereforealso the maximum output power. The ISVPL setting is made via MENU > MODULE > LIMITERS > ISVPL, and canalso be set from the Lake Controller software.The sophisticated output section monitors faults and generates warnings when appropriate; warnings aredisplayed on the front panel of the PLM+ and also sent as messages over the control network. In the rare eventthat maximum ratings are significantly exceeded, the PLM+ will mute until the condition has been rectified orthe incorrect setting has been readjusted. Sensing circuits also transmit local output power stage temperature,processor card temperature, and PSU temperature to the appropriate protection circuits. Please refer to section5.3 further details.Table 6.2 lists PLM+ Series analog input sensitivity in dBu and Vrms for various Amp Gain settings and maximum/minimum ISVPL settings, assuming an analog input headroom of 26 dBu.Table 6.2: Analog Input Sensitivity in dBu and Vrms6.3. Lake Processing and ControlAs outlined in section 2.2.3, this device integrates seamlessly into the Lake Processing environment, providing allfeatures, functionality and connectivity associated with all Lake Processors. The internal Lake Processing includesprogrammable crossovers, EQ, dynamics and other functions, and can be fully controlled via the Lake Controllersoftware with a version number of 6.3 or later. Additionally, many functions can be controlled or accessed directlyvia the front panel.The Lake Controller Operation Manual and Lake Network Configuration Guide are supplied on the accompanyingUSB key and additional documentation is available from the Start Menu after software installation.Visit http://labgruppen.com to download the latest software, firmware and documentation for your devices.Input SensitivityLISVPL SETTING 194 V 17.8 VLGAIN (dB)+44 +1.0 0.87 -19.8 0.08+41 +4.0 1.22 -16.8 0.11+38 +7.0 1.73 -13.8 0.16+35 +10.0 2.44 -10.8 0.22+32 +13.0 3.45 -7.8 0.32+29 +16.0 4.87 -4.8 0.45+26 +19.0 6.88 -1.8 0.63+22 +23.0 10.90 +2.2 1.00