Lab.gruppen PLM 20K44 Operation Manual page 19

Table 5.3 shows the theoretical maximum output power for a given load impedance and ISVPL setting.
Note: An ISVPL-to-load calculator that will assist in generating the appropriate ISVPL setting for a desired
power load is available at www.labgruppen.com/plm. The ratings shown in the table below are limited by the
CPL (Current Peak Limiter) functions, not by ISVPL settings, due to power output channel current capacity.
Max. Sinewave Burst Power (Watts)
LLoad Impedance (ohms)
LISVPL SETTING (V peak)
194 4489
193 4489
181 4489
167 4489
153 4489
121 3660
101 2550
83 1722
70 1225
56 784
47 552
38 361
17.8
Table 5.3: ISVPL-to-output examples
The ISVPL threshold may be set at any level between 17.8 V and 600 V via the PLM+'s menu system. For further
details, please refer to section 7.11.2.5 of this manual, and also to the PLM+ Series chapter in the Lake Controller
User Manual.
PLM+ devices that have a smaller peak output voltage can still set the ISVPL threshold up to 600 V. When a
threshold is set above the maximum capability of a power output channel, the maximum ISVPL for that product will
be automatically set. Therefore, the ISVPL threshold can be in at the Module for the speaker's maximum capability,
and the Module file remains cross-compatible with all PLM and PLM+ Series devices.
5.3.2. Current Peak Limiter (CPL)
The output Current Peak Limiter (CPL) ensures that the power output section will not be damaged by forcing it to
deliver current levels at the outputs that exceed the maximum current ratings of the output transistors. The CPL
keeps the output transistors within their Safe Operating Area (SOA). The CPL is non-adjustable.
CPL activity is indicated on the power output channel LED (embedded in the associated output channel's function
button to the right of the LCD). Activity on an affected channel results in a flashing red indication together with a
CURRENT CLIP warning message displayed on the screen adjacent to the LED. A warning is also displayed on
the controlling PC via the network.
2 2.67 4
5993 4705 2352
5993 4656 2328
5993 4095 2048
5223 3486 1743
4384 2926 1463
2742 1830 915
1910 1275 638
129 0 861 431
918 613 306
587 392 19 6
414 276 138
270 181 90
79 59 40 20
8 16
1176
1164
1024
872
732
458
319
215
153
98
69
45
10
PLM+ SERIES Operation Manual rev 1.0.0
5. Operation and performance
19