D i g i g r a m
16
APPENDIX B: SETTING THE INTERNAL JUMPERS
These settings shall be executed by qualified personnel only!
Tools Required
•
a #1 Pozidriv screwdriver
•
an ESD-preventive wrist strap
•
a small flat blade screwdriver
Electrostatic discharge (ESD) can damage several components on the board. To avoid such
damage in handling the board, take the following precautions:
Bring the device and everything that contacts it to ground potential by providing a
conductive surface and discharge paths. As a minimum, observe these precautions:
•
Disconnect all power and signal sources.
•
Place the device on a grounded conductive work surface.
•
Ground yourself via a grounding wrist strap or by holding a grounded object.
•
Ground any tools that will contact the device.
•
Unscrew the eight flat-head Pozidriv screws (four on top-side,
four on bottom-side) counterclockwise and open the cabinet.
Jumper locations on the main board
Audio 8 - 7
Audio 6 - 5
Audio 4 - 3
Audio 2 - 1
Input
impedance
(ES8in only)
Nominal input
level
(ES8in only)
Sampling
frequency
Operating
mode
Audio extraction
"downstream/upstream"
(ES8in & ES8out only)
End of
bi-directional loop
The figure above shows the locations of the different jumpers on the main board.
Area
1
explains the sampling frequency setting, area
2
illustrates the input settings for the audio channels;
every setting applies to one pair of balanced mono inputs. Please use the above overview to locate the pair
you'd like to modify. For the jumper settings in detail, please refer to the following close-ups:
