Dolby Laboratories DP571, DP572 Configuring Jumper Settings, Connector Tx Term On Rx Term On

Dolby E Multichannel Distribution System User Manual Introduction

1.7Configuring 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 1-4RS-485 Termination jumper settings

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

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.

1-16