Dolby Laboratories DP570 - Manual (Page 84)

72 Dolby ® DP570 Multichannel Audio Tool User’s Manual
Connector Specifications Video Ref
B.4 Video Ref
The Video Ref connections are BNC unbalanced female connectors that receive NTSC
composite programs or color black video. Signal levels are compliant with SMPTE 154
specifications. Two connectors are provided in parallel to provide loop‐through capability.
This input does not supply a clock signal to the unit but rather allows the metadata output
to maintain sync with a video reference.
B.5 Lt/Rt Inputs
These are BNC unbalanced female connectors compliant with AES‐3id‐1995/SMPTE 276M
specifications. Two connectors are provided in parallel for the Lt/Rt input to provide
loop‐through capability.
B.6 Metadata Input Ports
These ports are 9‐pin female D‐connectors with full‐duplex RS‐485 protocol running at 115
kbps. The pinout is SMPTE 207M compatible.
B.7 Metadata Output Port
These ports are 9‐pin female D‐connectors with full‐duplex RS‐485 protocol running at 115
kbps. The pinout is SMPTE 207M compatible.
Table B-2 Metadata Input Port Pinout
Pin Connection
1 Shield
2 TX A asynchronous data in – a
a. See the note on DCE equipment on page 71.
3 RX B asynchronous data out + a
4 Ground
5 NC
6 Ground
7 TX B asynchronous data in + a
8 RX A asynchronous data out – a
9 Shield
Table B-3 Metadata Output Port Pinout
Pin Connection
1 Shield
2 RX A asynchronous data out a –
3 TX B asynchronous data in a +
4 Ground
5 NC