TC Electronic DB8 MKII - Manual (Page 12)

12
Dsp & CarD COnneCTIOn
Use the supplied cable to connect the AES/EBU Inputs/
Outputs.
Cable type is twisted pair (12 pairs) with common screen.
Recommended impedance: 110 Ohm.
One end is equipped with an AES/EBU 25 pin D-Sub
connector, the other end is equipped with four male XLR’s
and four female XLR’s.
Male XLR’s are marked with: Out - 1 to 4.
Female XLR’s are marked with: IN- 1 to 4.
Extension cables must be constructed according to AES/
EBU-3 standards.
Following is the pin-out:
Cable pair
Pin number number XLR XLR-pin Assignment
1 1a Female 1 2 Input 1/2 +
2 2a Female 2 2 Input 3/4 +
3 3a Female 3 2 Input 5/6 +
4 4a Female 4 2 Input 7/8 +
5 5a Male 1 2 Output 1/2 +
6 6a Male 2 2 Output 3/4 +
7 7a Male 3 2 Output 5/6 +
8 8a Male 4 2 Output 7/8 +
9 No connection No connection
10 9a Female 1 1 Common
11 No connection No connection
12 9b Female 2 1 Common
13 10a Female 3 1 Common
13 10b Female 4 1 Common
14 1b Female 1 3 Input 1/2 -
15 2b Female 2 3 Input 3/4 -
16 3b Female 3 3 Input 5/6 -
17 4b Female 4 3 Input 7/8 -
18 5b Male 1 3 Output 1/2 -
19 6b Male 2 3 Output 3/4 -
20 7b Male 3 3 Output 5/6 -
21 8b Male 4 3 Output 7/8 -
22 11a Male 1 1 Common
23 11b Male 2 1 Common
24 12a Male 3 1 Common
24 12b Male 4 1 Common
25 Shield no connection Common
Twisted cable pairs must be respected
Sync In Word Clock
For connections to external clock via the standard BNC
connector (see illustration above).
When several devices are connected in a chain and
synced via Word Clock, termination on the last device of
the chain is necessary.
As the DB8/DB4 is expected to be the last unit in such a
chain (or the only), the factory default setting on the DSP
card is: TERMINATED (75 Om).
If you need to terminate the Word Clock signal elsewhere
in the chain you will need to un-terminate the DSP card.
To do this you must remove the DSP card from the
mainframe and remove the termination jumper:
• Switch off the power and disconnect main power cord.
• Loosen the two screws holding the DSP card and
remove the card gently.
• Remove the terminating jumper near the BNC plug.
• Insert the card gently in the DSP slot and remount
the screws.
Pins connected via jumper : Terminated (75 Om).
Pins NOT connected via jumper : Not Terminated
Termination jumper
BNC
connector