18
Appendix A
386
The dbx 386 comes with the word input 75Ω terminated. For certain configurations, you may
wish to have the sync input be unterminated. Certain "house sync" configurations will require
you to change the default position of the termination jumper on the main circuit board. For
example, if you run your sync to several pieces of equipment using a tapped configuration
(using BNC T’s) as shown below, only the last box, box C, would be terminated (marked "75
ohm terminated" on the circuit board). Unfortunately, some equipment does not allow the user
to change the termination setting. These pieces of equipment are usually provided with a per-
manent termination. If you use the 386 with another piece of terminated equipment in tapped
configuration, you should unterminate (marked "unterminated" on the circuit board) the 386’s
sync input. The same is true if you wish to use several 386’s in a tapped configuration. See Fig.
A.1 for the location of termination jumper.
Fig.A.1
Location of sync input termina-
tion jumper.“Terminated”
selection is shown.
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