Operation Manual

7. Front Panel Interface
PLM+ SERIES Operation Manual rev 3.0.4
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With a router selected on the front panel, press the middle button on the left of the LCD to activate this parameter
for editing. Use the illuminated rotary encoder to scroll through the following options:
• Auto Select (default)
• Force Priority 1
• Force Priority 2
• Force Priority 3
• Force Priority 4
Assignment of Input Priority
Factory default settings assign Dante 1-4 to Priority 1, Dante 5-8 to Priority 2, AES3 1-4 to Priority 3 and Analog
1-4 to Priority 4. For example, for Input Router 1 Dante 1 on Prio1, Dante 5 on Prio2, AES3 ch1 on Prio 3 and
Analog 1 on Prio 4
To change these settings via the front panel, select Priority slot number to be changed and use the rotary encoder
to scroll through the available options. Due to the signal hierarchy it is not possible to assign an analog source to a
higher priority than a digital source.
Analog Input Sensitivity and Digital Gain Offset
Press a dynamic function to the right of the LCD to toggle the selection of input source and input sensitivity/digital
gain offset then use the rotary encoder to change the parameter.
The maximum input level accepted by the analog input pre-ampliers without clipping is 26 dBu. Digital gain offset may
be applied to Dante or AES3 digital input signals in 0.1 dB increments from -100 dB to +15 dB.
7.11.3.2. AES3 Input Termination
MENU > I/O CONFIG > AES TERM
Figure 7.19: AES Termination
To adjust the AES3 Input Termination, select AES TERM from the Input Cong menu then use the rotary encoder
to toggle the value. An icon is displayed in the bottom left of the display in Meter Mode when AES is set to
‘Terminated’.
For fault-free operation when using AES3 digital audio as an input source, inputs must be correctly terminated
with the characteristic impedance of 110 ohm. The Input Termination setting is determined by the method used to
distribute the AES3 signals.
7. Front Panel Interface
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PLM+ SERIES Operation Manual rev 3.0.4
The PLM+ device at the end of a distribution line should be set to TERMINATED; all other PLM+ devices should be
set to UNTERMINATED. If an AES3 distribution amplier (DA) is being used to distribute the digital audio signals,
with one DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only
terminate the last PLM+ device in the chain.
7.11.3.3. Iso-Float
MENU > I/O CONFIG > ISO-FLOAT
Figure 7.20: Iso-Float
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 device 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.
7.11.3.4. Output Router
MENU > I/O CONFIG > OUTPUT RTR
With PLM+ Series, Module output routing to Power outputs as well as AES or Analog to Dante output routing is
accessible through the Front panel interface.
Figure 7.21: Output Router
7. Front Panel Interface
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PLM+ SERIES Operation Manual rev 3.0.4