Lab.gruppen PLM series Operation Manual page 58

Front Panel Interface
Assignment of Input Priority
Factory default settings assign AES3 to Priority 1 and Analog to Priority 4, with Priority 2 and 3 empty.
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-amplifiers without clipping may be set to 12 dBu
or 26 dBu. Digital gain offset may be applied to 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 7-13: AES Termination Edit Screen
To adjust the AES3 Input Termination, select AES TERM from the Input Config 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 termi-
nated with the characteristic impedance of 110 ohm. The Input Termination setting is determined by the
method used to distribute the AES3 signals.
The processor at the end of a distribution line should be set to TERMINATED; all other processors should
be set to UNTERMINATED. If an AES3 distribution amplifier (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 processor in the chain.
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PLM Series Operation Manual rev 1.1.9