Lexicon CORE2, Service Manual

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Lexicon
4-1
Chapter 4 Performance Ver i fication
This section describes a quick verification of the operation of the Lexicon Core2 system and the integrity of
its analog and digital audio signal paths. These tests should be performed without any programs running on
the PC. Preferably, the tests should be run after a fresh start-up.
Test Overview:
These tests verify the analog and digital audio paths through the Core2 Connector Box and the Core2 Main
board installed in the computer. The audio testing is preformed using the LexPanel.EXE program. The
LexPanel provides multiple paths of audio routing so that in the event of a failure, the defective circuit can
be located and repaired.
User Interface:
The LexPanel consists of three pages that are used for selecting the Audio Inputs, Audio Outputs, Sample
Rate, Clock Source, etc. Double clicking on the LexPanel Icon in the lower right hand section of the task bar
can access these pages. Each tab of the LexPanel can be accessed by using the mouse or via the function
keys F5, F6 & F7.
F5 is for the Punch page
F6 is for the Clock Source page
F7 is for the Core2 page
Punch page:
The Punch page is used for selecting the Audio Inputs and Audio Outputs to be tested. The example below
shows the Analog Input 1 (A/D 1) being routed to the Left S/PDIF Digital Output (S/PDIF Out L).
NOTE: The “
Enable Punch
” checkbox must be selected, and the “
Monitor
” button (lower right) must also
be enabled prior to the selection of the audio A/D input Sources and D/A output destinations.