Manual
6. Signal Flow and Lake® Processing
26
PLM+ SERIES Operation Manual rev 1.0.0
6.2.1. Power Output Section: Limiting and Sensitivity
The Current Peak Limiter (CPL) dynamically limits the drive to the power stage based on three parameters: sensed
output current level, feedback from the output stage, and sensed voltage clip from the ISVPL. This ensures that
power 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 therefore
also the maximum output power. The ISVPL setting is made via MENU > MODULE > LIMITERS > ISVPL, and can
also be set from the Lake Controller software.
The sophisticated output section monitors faults and generates warnings when appropriate; warnings are
displayed on the front panel of the PLM+ and also sent as messages over the control network. In the rare event
that maximum ratings are signicantly exceeded, the PLM+ will mute until the condition has been rectied or
the 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 section
5.3 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 Vrms
6.3. Lake Processing and Control
As outlined in section 2.2.3, this device integrates seamlessly into the Lake Processing environment, providing all
features, functionality and connectivity associated with all Lake Processors. The internal Lake Processing includes
programmable crossovers, EQ, dynamics and other functions, and can be fully controlled via the Lake Controller
software with a version number of 6.3 or later. Additionally, many functions can be controlled or accessed directly
via the front panel.
The Lake Controller Operation Manual and Lake Network Conguration Guide are supplied on the accompanying
USB key and additional documentation is available from the Start Menu after software installation.
Visit http://labgruppen.com to download the latest software, rmware and documentation for your devices.
Input Sensitivity
LISVPL SETTING
194 V 17.8 V
LGAIN (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