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INTRODUCTION ORBAN MODEL 8685
can do from the 8685’s front panel controls. The program displays all of the 8685’s
meters on the computer screen to aid remote adjustment. Because of the large
numbers of meters and controls in the 8685, we expect that most users will prefer to
operate it via PC Remote.
RS-485 Serial Ports
There are two RS-485 serial ports on the rear panel (serial ports #2 and #3). These
can operate up 115 kbps. These can accept and emit Dolby® AC3 metadata.
RS-232 Serial Port
8685 PC Remote can communicate at up to 115 kbps direct connection between the
computer and the 8685 through their RS-232 serial ports.
RJ45 Ethernet Connector
The 8685 can be connected to any Ethernet network that supports the TCP/IP proto-
col.
See page 2-45 for instructions on how to control the 8685 via the RS-232 and
Ethernet ports via a terminal emulator and
page 2-65 for instructions on how to
connect to the 8685 via its PC Remote application for Windows.
Optional HD-SDI Input/Output
The optional HD-SDI I/O module offers supports SD-SDI (per SMPTE 259M); 1.5 Gbit/s
HD-SDI (per SMPTE 292M; up to 720p and 1080i) and 3.0 Gbit/s single-wire HD-SDI
(per SMPTE 424M; 1080p).
The SDI I/O can de-embed up to eight channels of audio, send them to the 8685’s
DSP for audio processing, and then re-embed them with video that has been de-
layed to maintain AV-sync. There are four variants (see Optional HD-SDI In-
put/Output Interface Module on page 6-3 for details).
The
HD-SDI module can accommodate Dolby-E® decoding and encoding via op-
tional plug-in modules.
A relay provides hard-wire safety bypass from the SDI input to the SDI output in case
of hardware failure.
Routing Audio to and from the 8685
Audio links are used in different ways. Performance requirements differ depending
on the application:
• A link that passes unprocessed audio to drive the OPTIMOD 8685 should have
very low noise and low non-linear distortion, but its transient response is not
important.
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