Lexicon CORE2, Service Manual

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Lexicon Studio Core2 Service Manual
4-6
14. Using optical cable connect the Optical Output from the digital audio source to the Optical Input on the
back of the Core2 card as described in Step 1 above.
15. In the Routing area, activate the Optical S/PDIF In by checking the Optical box.
16. Repeat steps 10 and 11 to test audio quality.
Gain Tests:
Analog In To Digital Out Gain Test:
The A-D Gain tests verify that audio is passed from the analog input under test to the digital output.
1. Apply a 1kHz signal @ +8dBv from the Analog Low Distortion Oscillator to the Analog Input marked #1
on the Core2 Connector Box.
2. Connect the digital output marked S/PDIF of the Core2 Connector Box to the Digital Distortion Analyzer
3. Open the LexPanel by double clicking on the Lexicon Studio Icon.
4. Click on the Core2 tab to bring it forward. In the Routing area, activate the Analog Inputs and S/PDIF
Out buttons by clicking on it. If Optical is enabled (checked), disable it.
5. To activate your Routing selections, click on the Apply button, if it is flashing. There is no need to click
the Apply button if it is not flashing.
6. Click on the Clock Source tab to bring it forward. In the Clock Source menu, select Internal and set the
Sample Rate to 44100.
7. Click on the Punch tab to bring it forward. To enable your Input Source and Output Destinations
selected from the Core2 tab, make sure the enable punch check-box is selected (it will have a check in
the box if enabled)..
8. Hold the CTRL key down on the computer keypad, then in the Sources menu, select all A/D inputs 1-4.
9. Hold the CTRL key down and select S/PDIF Out L and S/PDIF Out R in the Destinations menu.
10. Verify the digital output is –1.5dBFS, (+/-.5dBFS).
11. To test the remaining Inputs, move the input cable from the #1 analog input to each of the remaining
inputs 2-4 and test for the audio spec as described above.
12. The above test needs to be repeated for the S/PDIF Optical output connection of the Core2.
13. Disconnect the Coax S/PDIF Output.
14. Using optical cable connect the Optical Output on the back of the Core2 card to the Digital Distortion
Analyzer as stated in Step 2 above.
15. In the Routing area, activate the Optical S/PDIF Out by checking the Optical box.
16. Disconnect the Coax S/PDIF input and configure the D/A device for Optical S/PDIF.
17. Move the Audio Input cable back to the analog #1.
18. Repeat steps 10 and 11 to test for Gain specification.
Digital In To Analog Out Gain Test:
The D-A Gain tests verify that audio is passed from the digital input to the analog output.
1. Apply a 1kHz signal @ 0.0dBFS signal from the Digital Function Generator to the S/PDIF IN on the
Core2 Connector Box.
2. Connect the analog output marked #1 on the Core2 Connector Box to the Analog Distortion Analyzer.
3. Open the LexPanel by double clicking on the Lexicon Studio Icon.
4. Click on the Core2 tab to bring it forward. In the Routing area, activate the S/PDIF In, Analog Outputs 1-
4, and Output 5-8 buttons by clicking on each of them. If Optical is enabled (checked), disable it.
5. To activate your Routing selections, click on the Apply button, if it is flashing. There is no need to click
the Apply button if it is not flashing.
6. Click on the Clock Source tab to bring it forward. In the Clock Source menu select S/PDIF.
7. Click on the Punch tab to bring it forward. To enable your Input Source and Output Destinations
selected from the Core2 tab, make sure the enable punch check-box is selected with a check.
8. Hold the CTRL key down on the computer keypad, then in the Sources menu S/PDIF In L and S/PDIF
In R.
9. Hold the CTRL key down and select all the D/A outputs 1-8 in the Destinations menu.