Optimod-Surround 8685 V1.0 Operating Manual - Orban

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INSTALLATION ORBAN MODEL 8685
• If you will be using the 8685’s AESid inputs to receive the audio input
signal, you must insert the Penteo into the lines driving the 8685:
[AES3id input feed] � [Penteo] �[8686 AESid inputs]
In this case, set the 8685’s input switcher the same as if you were receiving
a true 5.1 source. The Penteo will pass true 5.1 material applied to its
three AES3id inputs and will delay this material to match the delay (approximately
265 ms) of the Penteo upmix process. It will upmix 2.0 material
applied to its AES3id 1/2 input and can be configured so that it detects
the difference between 5.1 and 2.0 inputs and activates upmixing
automatically as necessary.
• If you will be using audio embedded on the SDI input, you must dedicate
the 8685’s three AES3id inputs and outputs to a Penteo loop-through
connection.
This will make these connectors unavailable for use by the 8685’s 2.0
processors.
• Configure the 8685's routing switcher so that audio channels 1/2 received
from the SDI input are routed to Digital Output 1/2 on the SDI card. Similarly,
route SDI channels 3/4 to Digital Output 3/4 and route SDI channels
5/6 to Digital Output 5/6.
• Configure the 8685's routing switcher so the audio channels 1/2 received on
Digital Input 1/2 (BNC connector) are routed to the Lf/Rf inputs of the
8685's multichannel audio processing. Similarly, route Digital Input 3/4 to
C/Lfe and route Digital Input 5/6 to Ls/Rs.
• Connect the three 8685 digital outputs (1/2, 3/4, and 5/6) to Penteo digital
inputs 1/2, 3/4, and 5/6 respectively.
• Connect Penteo digital outputs 1/2, 3/4, and 5/6 to 8685 digital inputs 1/2,
3/4, and 5/6 respectively.
This will produce following signal processing chain:
[…SDI source] �
[8685 SDI RECEIVER � 8685 AES3id outputs] �
[Penteo] �
[8685 AES3id inputs � 8685 Audio Processing � 8685 SDI transmitter] �
[downstream SDI destination…]
The easiest way to configure the 8685’s router for Penteo loop-through is
to recall the 8685’s Penteo System Preset, which we have pre-configured
to realize this block diagram.
AV Sync: Penteo’s delay is large enough to introduce unacceptable AV sync errors
unless the video signal is delayed equally. The 8685’s optional SDI board can
apply up to 11 frames of video delay to the video, which is more than enough to
accommodate the delay of the Penteo, the 8685 audio processing, and a roundtrip
Dolby-E decode/encode cycle. If you do not have the SDI board, to maintain
AV sync you must apply video delay or reduce audio make-up delay elsewhere in
your transmission system.