Mute Functions - Lab.gruppen PLM series Operation Manual

In METER mode, and with MUTE ENABLE active, the soft function buttons are used to mute and unmute
the PLM's individual Module inputs and power stage outputs.
In MENU mode these buttons are used to navigate the menu structure.
Each button contains a tricolor LED. This LED
conveys fault and warning indication as well as
mute status. The LED's function does not necessar-
ily correspond to the current soft button function.

9.10.1 Mute functions

The PLM provides mute functions at several different points in its audio chain. See figure 8.1 (PLM Signal
Flow Diagrams) for mute locations and description.
The four available mutes are:
1. PLM Input Mutes
2. Module Input Mutes
3. Module Output Mutes
4. Power Output Mutes
Three of these mutes may be controlled from the PLM front panel when in Meter Mode MENU > Module >
Mute by using the MUTE ENABLE button; these are:
▸
PLM Input Mutes
▸ Module Input Mutes
▸ Power Output Mutes
For safety it is not possible to change either of these mutes without first selecting MUTE ENABLE.
It is also possible to control these mutes from the Lake Controller software. Module Input and
Output Mutes can also be controlled via the menu system (i.e. in MENU mode, not METER mode)
or the Lake Controller software.
In Home, Module and Temperature View, when MUTE ENABLE is selected, up to six (model dependent)
of the front panel soft function buttons become the mute switches for the Module Inputs and PLM power
Outputs. See figure 9.10.1.
Module A
Module B
Figure 9.10.1a: Soft function buttons on a four
channel PLM when Mute Enable is active
Ch1
Module A
Ch2
Module B
Ch3
Ch4
Figure 9.10.1b: Soft function buttons on a two
channel PLM when Mute Enable is active
PLM Series Operation Manual rev 1.1.3
9. Front Panel Interface
Ch1
Ch2
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