User`s guide

User’s Guide HDSP System Multiface © RME
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Use this unique moment and have a look at the internal design of the Multiface. On the right
side of the lower printed circuit board (PCB) you can see the two switching power supplies.
They generate both 5 Volts (for the digital circuitry) and ±13 Volts (for the analog circuitry) from
nearly every possible input voltage. In the center you'll see the heart of the Multiface, the Xilinx
FPGA. The analog circuitry and DA-converter for the headphone output is located on the right
from the FPGA. Left from the FPGA two Low Jitter PLLs can be seen. On the outer left side
you'll find 16 capacitors of the analog outputs and a 50-pin flat cable connector. The flat cable
connects lower and upper board, the latter being the analog board, which is mounted down-
under at the cover.
The analog board is covered from a thin metalized shield, preventing noise from digital circuitry
and flat cable being coupled into analog inputs and outputs. The shield is flexible and can be
bended up, so that the view onto the analog board gets free.
But now back to the jumper settings.
6. Bend the flexible shield carefully upwards. You'll now see the analog board with its 16
jumpers for level settings.
7. The jumpers controlling the sensitivity of the inputs are located directly behind each TRS
input jack. They allow three different settings: Left (middle plus left pin), right (middle plus right
pin), and without jumper. If the device is still placed with the front panel to the front, then Left
means +4 dBu (factory default), right means Lo Gain, and without jumper means –10 dBV.
8. The jumpers controlling the output level are located on the other side of the board, and are
placed in pairs. The jumper more near to the center of the board is the one of the even channel
(2/4/6/8). Again three settings are possible: Left (middle plus left pin), right (middle plus right
pin), and without jumper. If the device is still placed with the front panel to the front, then Left
means +4 dBu (factory default), right means Lo Gain, and without jumper means –10 dBV.
A drawing showing the jumper position for each level setting is found on the left side
(underneath the flat cable) on the analog board.
To prevent the loss of jumpers in –10 dBV mode, we recommend not to remove them
completely, but to mount them at the outside of the jumper (no connection to the center
pin).
Now you are ready to re-assemble the Multiface.
9. Turn the cover to the left and move it back over the Multiface.
Take care that the flat cable has the same accurate shape as when opening it. Else the flat
cable will cause mechanical problems while re-assembling!
10. Move the cover so that it is placed 2 centimeters (1 inch) above the housing. Tilt the cover
so that the jacks point to the holes in the rear panel. Carefully slide the jacks into the holes by
moving the cover away from you. When inserted completely into the rear panel, the cover can
now be layed down.
11. Re-fit the 6 screws into the cover, and re-fit and tighten both screws of the D-sub jack.
That's it!