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OPTIMOD 8685
Orban OPTIMOD 8685 User Manual
357 pages
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Operating Manual
OPTIMOD
8685
Surr
ound A
udio
Pr
ocessor
V
ersion 1.0 Softwar
e
2
Table of Contents
Default Chapter
3
Default Chapter
3
Important Safety Instructions
3
Table of Contents
8
Index
15
Section 1 Introduction
29
Crucial Information-Please Read
29
The Optimod 8685 Digital Audio Processor
30
Using this Manual
30
Absolute Control of Loudness and Peak Modulation
31
Flexible Configuration
32
Adaptability through Multiple Audio Processing Structures
34
Controllable
35
User-Friendly Interface
35
Presets in Optimod 8685
36
Factory Processing Presets
37
User Processing Presets
37
Digital Aes3Id Inputs/Outputs
38
Input/Output Configuration
38
Analog Outputs
39
Computer Interface
39
Remote Control Interface
39
Optional HD-SDI Input/Output
40
RJ45 Ethernet Connector
40
Routing Audio to and from the 8685
40
RS-232 Serial Port
40
RS-485 Serial Ports
40
Links from the 8685'S Output to a Transmission Encoder or Transmitter
41
Using Lossy Data Reduction before the 8685'S Input
41
Sample Frequency Synchronization
42
AV-Sync Delay
43
Using the 8685 to Control Studio Output Levels
43
About Transmission Levels and Metering
44
Figure 1-1: Absolute Peak Level, VU and PPM Reading
44
Meters
44
Using Optimod 8685 as a Studio Level Controller
44
Studio Line-Up Levels and Headroom
45
Transmission Levels
45
Line-Up Facilities
46
Metering of Levels and Subjective Loudness
46
Calibrated Bypass Test Mode
48
Test Modes
48
Calibrated Line-Up Tones
49
Setting Output/Modulation Levels
49
Loudness
50
Streaming and Netcasting Applications
50
Using OPTIMOD 8685 in Streaming Applications
50
Choosing Your Encoder
51
Eas Transmission
51
Pc Control and Security Passcode
51
International Warranty
52
Limited Warranty
52
User Feedback
52
Warranty, User Feedback
52
Extended Warranty
53
Section 2 Installation
55
Installing the 8685
55
8685 Rear Panel
59
Aes3Id Digital Inputs and Outputs
60
Input and Output Connections
60
Analog Audio Output
61
HD-SDI Input and Output (Optional)
61
Wordclock/Aes11Id Sync Input
61
Power Ground
62
Quick Setup
62
I/O Setup
73
Using Clock-Based Automation
92
Security and Passcode Programming
94
8685 User Interface Behavior During Lockout
97
Default ADMIN Passcode
97
To Unlock the Front Panel
97
If You Have Forgotten Your "All Access" Passcode
98
Passcodes and Software Updates
98
Security and Orban's Pc Remote Application
98
Administering the 8685 through Its Rs-232 Serial Port or Ethernet
99
Connecting Via the RS-232 Port Using a Terminal Program on a PC
100
Administrative Operations
101
Connecting to the 8685'S Ethernet Port or Rs-232 Port Using Tcp/Ip
106
Recalling a Processing Preset
108
Remote Control Interface Programming
108
Using the API: Example
108
Networking and Remote Control
110
Synchronizing Optimod to a Network Timeserver
113
Installing 8685 Pc Remote Control Software
116
Installing the Necessary Windows Services
116
Check Hardware Requirements
117
Running the Orban Installer Program
117
Setting up Ethernet, LAN, and VPN Connections
118
Conclusion
119
Appendix: Setting up Serial Communications
121
Connecting Using Windows 2000 Direct Serial Connection
121
Preparing for Communication through Null Modem Cable
121
Connecting Using Windows XP Direct Serial Connection
126
Connecting Using Windows 2000 Modem Connection
131
Preparing for Communication through Modems
131
Connecting Using Windows XP Modem Connection
137
Updating Your 8685'S Software
142
Section 3 Operation
145
8685 Front Panel
145
Distortion in Processing
148
Introduction to Processing
148
Loudness and Distortion
148
Some Audio Processing Concepts
148
Processing for Low Bit Rate Codecs
149
Sound-For-Picture Applications: Controlling Dynamic Range
150
Speech/Music Detector
150
Optimod 8685 in Audio-Only Applications: from Bach to Rock
151
About the 8685'S Signal Processing Features
152
Simultaneous Stereo (2.0) and Surround (5.1 or 7.1) Processing
152
Input Conditioning
153
Signal Flow
153
Two-Band Gated AGC
153
Equalization
154
Multiband Compressor/Limiter
155
LFE Processing
157
Low-IM Look-Ahead Limiter
157
Loudness Control
158
Customizing the 8685'S Sound
160
Input/Output Delay
160
Basic Modify
161
Advanced Modify
162
Intermediate Modify
162
Setting Preset Loudness Correctly for Dolby Digital Transmission
163
Gain Reduction Metering
164
To Create or Save a Preset
164
About the Processing Structures
165
Factory Programming Presets
168
To Import a 2.0 Preset from PC Remote
169
To Import a 2.0 Preset from the 8685'S Front Panel
169
Sound-For-Picture Presets
170
Protection and Studio AGC Presets
174
Radio-Style Presets
176
Equalizer Controls
180
Agc Controls
185
Advanced AGC Controls
187
AGC Controls Exclusive to 2.0 Processing
189
Distortion Control
190
The Two-Band Structure
192
Customizing the Settings
193
The Two-Band Structure's Full and Advanced Setup Controls
193
Advanced Two-Band Controls
196
Nee Atio
198
The Five-Band Structure
199
Using the Five-Band Structure
199
Customizing the Settings
200
The Five-Band Structure's Full and Advanced Setup Controls
200
Advanced Five-Band Controls
206
Test Modes
208
To Set up a New Connection
209
Using the 8685 Pc Remote Control Software
209
To Initiate Communication
210
To Modify a Control Setting
210
To Import a Preset into the 2.0 Processing
211
To Recall a Preset
211
To Back up User Presets, System Files, and Automation Files Onto Your Computer's Hard Drive
212
To Save a User Preset You Have Created
212
Note to Users Familiar with Older Version of PC Remote
213
To Restore Archived Presets, Setups, and Automation Files
213
Etup
214
To Modify AUTOMATION
214
To Modify the Active S
214
About Aliases Created by Optimod 8685 PC Remote Software
215
Navigation Using the Keyboard
215
To Group Multiple 8685S
215
To Quit the Program
215
Multiple Installations of Optimod 8685 PC Remote
216
Using the 8685 for Production and Mastering
217
Appendix A: Using the Itu Bs.1770 and Cbs Loudness Meters to Measure Loudness Controller Performance
222
Test Setup
222
Results
223
Histograms
225
Studies Indicating that BS.1770 Is Inaccurate at very Low Frequencies
225
Conclusions
227
Section 4 Maintenance
229
Routine Maintenance
229
Subassembly Removal and Replacement
230
Field Audit of Performance
236
Test Procedure for the Base I/O Module
239
Section 5 Troubleshooting
245
Loudness Incorrect Compared to Other Dolby Digital Transmissions
245
Problems and Potential Solutions
245
Commercials too Loud in Sound for Picture Applications
246
Loudness Controller Reduces Transient Punch of Programming
246
Transient Loudness Events (Like Esses in Speech) Sound Obtrusively Loud
246
Dialog Is Buried by Music And/Or Effects
247
Dialog Is Muffled
247
Dull Sound
247
LFE Channel Is Unbalanced with Respect to the Rest of the Audio Spectrum
247
Shrill, Harsh Sound
247
Audible Distortion
248
Poor Peak Modulation Control
248
RFI, Hum, Clicks, or Buzzes
248
Too Much Bass When the Loudness Controller Is Producing Large Amounts of GR
248
Unexpected Gain Pumping When Processing 5.1 Material
248
Audible Noise
249
Equipment Receiving the 8685'S 2.0 Processing Output Changes Operation Mode Unexpectedly
250
Mode
250
System Receiving 8685'S Digital Output will Not Lock
250
System will Not Lock to Video Sync at 88.2 or 96 Khz
250
System will Not Pass Emergency Alert System ("EAS" USA Standard) Tones at the Legally Required Modulation Level
250
System will Not Pass Line-Up Tones at 100% Modulation
250
Connection Issues between the 8685 and a PC, Modem, or Network
251
General Dissatisfaction with Subjective Sound Quality
251
Security Passcode Lost (When Unit Is Locked Out)
251
Troubleshooting Connections
251
You Cannot Access the Internet after Making a Direct or Modem Connection to the 8685
252
Os-Specific Troubleshooting Advice
253
Troubleshooting Windows XP Direct Connect
253
Technical Support
254
Troubleshooting Windows XP Modem Connect
254
Factory Service
255
Shipping Instructions
255
Section 6 Technical Data
257
Performance
257
Specifications
257
Installation
258
Circuit Description
262
Control Circuits
263
Overview
263
User Control Interface and LCD Display Circuits
264
Input Circuits
265
Output Circuits
266
DSP Circuit
267
Power Supply
268
HD-SDI Module (Optional)
269
Abbreviations
269
Parts List
271
Obtaining Spare Parts
271
Base Board
272
CPU Module
273
Serial I/O Board
275
Base Input/Output (I/O) Board (for Units Without SDI)
276
DSP Board
278
Headphone Board
280
Interface Board
280
Encoder Board
281
LCD Carrier Board
281
Power Supply Distribution Board
282
Optional HD-SDI I/O Board
283
Optional Serial RS-232 / RS-485 Board for HD-SDI Option
289
Description
290
Base Board
290
Schematics and Parts Locator Drawings
290
Top View
290
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Orban OPTIMOD 8685 Specifications
General
Category
Audio Processor
Channels
Stereo
A/D Conversion
24-bit
D/A Conversion
24-bit
Connectivity
Ethernet, AES/EBU, Analog
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