Dolby Laboratories DP572 - Manual (Page 28)

Dolby E Multichannel Distribution System User Manual Introduction
1-16
1.7 Configuring Jumper Settings
Although the DP571 encoder and DP572 decoder will function correctly with no internal
adjustments, five jumpers provide additional termination options. Any necessary
changes to the jumpers should be made before the units are installed.
There are 124 Ω terminations on both units for the RS-485 Metadata and Remote control
ports. The units ship with these terminations bypassed (pins 3 and 4). Refer to the table
below for additional settings.
Table 1-4 RS-485 Termination jumper settings
The only remaining terminations are accessed via the passive loop-through BNC
connectors on each unit’s rear panel. The video reference input on both units should be
terminated if the loop through is not used to feed other equipment.
The AES3-ID-1995/SMPTE276-M standard uses a 75 Ω connection and requires proper
termination. As with video, the termination should occur only at the destination of the
signal (i.e., on the inputs to a device). For the DP571, the loop-through BNC connectors
for the inputs must have terminators if they are not being used to feed other equipment.
For the DP572, the loop-through BNC for the Dolby E input must be terminated.
Connector Tx Term On Rx Term On
DP571 Metadata J13, Pin 1/2 J15, Pin 1/2
DP571 Remote J12, Pin 1/2 J14, Pin 1/2
DP572 Metadata J15, Pin 1/2 J13, Pin 1/2
DP572 Remote J12, Pin 1/2 J14, Pin 1/2