Attenuation Submenu - Lab.gruppen PLM series Operation Manual

Front Panel Interface
7.11.3.3 Iso-Float
MENU > I/O CONFIG > ISO-FLOAT
Figure 7-14: Iso-Float Menu
To change the Iso-Float setting, adjust the value using the rotary encoder. The current settings are also
displayed on the front panel I/O STATUS screen.
The analog inputs utilize Iso-Float transformerless electronic balancing circuitry. This provides electrical
isolation from an analog source comparable to that achieved with transformer-based designs. However, pin
1 of the XLR input connector may be connected to ground within the PLM if desired. This option is selected
by using the rotary encoder to toggle between FLOATING and GROUNDED.
It may be necessary to change this setting to resolve ground loop problems when using analog inputs.
7.11.4

Attenuation Submenu

MENU > ATTENUATION
Figure 7-15: Attenuation Menu
The default setting of 0.00 dB (i.e. no attenuation) is adjustable in 0.25 dB increments down to -100 dB.
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PLM Series Operation Manual rev 1.1.9