Orban OPTIMOD-FM 8500 Effect Processor
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Modelo:
OPTIMOD-FM 8500
Data:
2011
Categoria:
Grupo:
Descrição:
Digital Audio Processor
Informação
The OPTIMOD-FM 8500 Digital Audio Processor
Orban’s all-digital 8500 OPTIMOD-FM Audio Processor can help
you achieve the highest audio quality in FM stereo
broadcasting. Because all processing is performed
by high-speed mathematical calculations within Motorola
DSP56367 24-bit digital signal processing chips, the
processing has cleanliness, quality, and stability over time
and temperature that is unmatched by analog processors.
OPTIMOD-FM 8500 is descended from the industry-standard
OPTIMOD-FM audio processors. Thousands of these processors
are on the air all over the world. They have proven that the
“OPTIMOD sound” attracts and keeps an audience even in the
most competitive commercial environment.
Because OPTIMOD-FM incorporates several audio processing
innovations exclusive to Orban products, you should not
assume that it can be operated in the same way as less
sophisticated processors. If you do, you may get
disappointing results.
Take a little time now to familiarize yourself with
OPTIMOD-FM. A small investment of your time now will yield
large dividends in audio quality. The rest of Section 1
explains how OPTIMOD-FM fits into the FM broadcast facility.
Section 2 explains how to install it. Section 3 tells how to
operate OPTIMOD-FM.
Section 4 through Section 6 provides reference information.
OPTIMOD-FM was designed to deliver a high quality sound
while simultaneously increasing the average modulation of
the channel substantially beyond that achievable by
“recording studio”-style compressors and limiters. Because
such processing can exaggerate flaws in the source material,
it is very important that the source audio be as clean as
possible.
For best results, feed OPTIMOD-FM unprocessed audio. No
other audio processing is necessary or desirable.
If you wish to place level protection prior to your studio /
Transmitter link (STL), use the Orban OPTIMOD 6300 or
Optimod-PC 1101. These processors can be adjusted so
that they substitute for the AGC circuitry in OPTIMOD-FM,
which is then defeated.
OPTIMOD-FM 8500 is available in two front-panel
configurations—the 8500 has a full-featured front panel,
while the 8500X has a blank front panel and must be con-
trolled by Orban’s PC Remote application running on
Microsoft Windows XP, 2000 (SP3), or later. Both units have
identical sound and features except for the difference
in their front panels. Both units run the same software.
If you are setting up an “X” version, refer to Administering
the 8500 through its Serial Ports or Ethernet (starting on
page 2-43) for instructions on how to use the 8500X’s serial
port #2 to set up communications between your computer and
the 8500X.
Both the 8500 and 8500X simultaneously process for analog FM
and digital channels like the iBiquityTM HD RadioTM system,
Eureka 147 (DAB), DRM, or netcasts. The 8500’s HD output
provides look-ahead peak limiting that is optimized to make
the most of limited bit-rate codecs used in many digital
radio systems. By eschewing any clipping, the HD output
prevents the codec from wasting precious bits encoding
clipping distortion products, allowing the codec to use its
entire bit budget to encode the desired program material.
Thanks to a base sample rate of 64 kHz throughout the 8500’s
processing, the HD output can be set for audio bandwidths
between 15 and 20 kHz. Many codecs operate better when fed
15 kHz audio because this enables them to use their
available bit bandwidth most efficiently by concentrating on
the part of the audio spectrum that is critical to perceived
audio quality. This is particularly true for low rates, like
32 kbps. However, at higher sample rates, full 20 kHz
bandwidth provides the same bandwidth as typical source
material, so you may prefer to use it for rates of 96 kbps
and above.
Tipo de manual:
Serviço e Manual do Usuário
Páginas:
350
Tamanho:
6.40 Mbytes (6708623 Bytes)
Idioma:
english
Revisão:
ID de manual:
96123.300.00
Data:
2011 05 01
Qualidade:
Documento eletrônico, digitalização, bem legível.
Data de upload:
2017 10 31
MD5:
c2d37b76912f7aadcdda159580ec36fd
Downloads:
711
Informação
Version 3.0 Software/Hardware
Index ... 0-10
Section
1
Introduction
... 1-1
ABOUT THIS
MANUAL ... 1-1
THE OPTIMOD-FM 8500 DIGITAL AUDIO PROCESSOR
... 1-1
User-Friendly
Interface ... 1-2
Absolute Control of Peak
Modulation ... 1-3
Flexible Configuration
... 1-3
Adaptability through Multiple Audio Processing Structures
... 1-5
Controllable
... 1-5
Upgradeable
... 1-6
PRESETS IN OPTIMOD-FM
... 1-7
Factory Presets
... 1-7
User Presets
... 1-7
I NPUT/ OUTPUT CONFIGURATION
... 1-7
Digital AES3 Left/right Input/outputs
... 1-8
Analog Left/right Input/output
... 1-8
Stereo Analog Baseband Composite Output
... 1-9
Subcarriers ... 1-9
Remote Control Interface
... 1-10
Computer Interface
... 1-10
RS-232 Serial Port (Serial
1) ...
1-11
RS-232 Serial Port (Serial
2) ...
1-11
100 Mbps Ethernet Port
...
1-11
LOCATION OF
OPTIMOD-FM ... 1-11
Optimal Control of Peak Modulation Levels
... 1-11
Best Location for OPTIMOD-FM
... 1-12
If the Transmitter is not
accessible: ...
1-12
If the Transmitter is accessible:
...
1-13
STUDIO-TRANSMITTER LINK
... 1-14
Transmission from Studio to
Transmitter ... 1-14
Digital Links
...
1-15
Composite Baseband Microwave STLs (Analog and
Digital) ... 1-16
Dual Microwave
STLs ...
1-16
Analog Landline (PTT / Post Office
Line) ...
1-17
Using the Orban 8100AST (or 8100A/ST) External AGC with the
8500 ... 1-18
STL and Exciter Overshoot
... 1-18
USING LOSSY DATA REDUCTION IN THE
STUDIO ... 1-18
ABOUT TRANSMISSION LEVELS AND METERING
... 1-19
Meters
... 1-19
Figure 1-1: Absolute Peak Level, VU and PPM Reading
... 1-19
Studio Line-up Levels and Headroom
... 1-20
Transmission
Levels ... 1-20
LINE-UP FACILITIES
... 1-21
Metering of
Levels ... 1-21
Left/right Output Level
...
1-21
Composite Output Level
...
1-21
Built-in Calibrated Line-up
Tones ...
1-2
Built-in Calibrated Bypass Test Mode
...
1-22
MONITORING ON LOUDSPEAKERS AND
HEADPHONES ... 1-22
Low-Delay Monitoring
...
1-24
EAS TEST
... 1-24
PC CONTROL AND SECURITY P
ASSCODE ... 1-25
WARRANTY , USER
FEEDBACK ... 1-26
User
Feedback ... 1-26
LIMITED WARRANTY
... 1-26
INTERNATIONAL WARRANTY
... 1-26
EXTENDED WARRANTY
... 1-27
Section
2
Installation
... 2-1
INSTALLING THE
8500 ... 2-1
Figure 2-1: AC Line Cord Wire
Standard) ...
2-2
Figure 2-2: Wiring the 25-pin Remote Interface Connector
... 2-4
8500 REAR PANEL
... 2-5
AUDIO INPUT AND OUTPUT CONNECTIONS
... 2-6
Cable ... 2-6
Connectors
... 2-6
Analog Audio
Input ... 2-7
Analog Audio Output
... 2-7
AES3 DIGITAL INPUT AND OUTPUT
... 2-8
COMPOSITE OUTPUT AND SUBCARRIER INPUTS
... 2-9
Figure 2-3: Separation vs. load capacitance
...
2-9
GROUNDING
... 2-11
Power
Ground ... 2-11
Circuit Ground
... 2-12
8500 FRONT PANEL
... 2-12
EXTERNAL AGC INSTALLATION (OPTIONAL)
... 2-14
If you are using an Orban 8200ST external
AGC: ... 2-14
Figure 2-4: 8200ST Jumper Settings (*Factory Configuration)
... 2-15
QUICK SETUP
... 2-17
ANALOG AND DIGITAL I/O SETUP
... 2-24
USING CLOCK-BASED AUTOMATION
... 2-36
SECURITY AND PASSCODE PROGRAMMING
... 2-37
To Unlock the Front Panel
... 2-40
8500 User Interface Behavior during
Lockout ...
2-40
Default ADMIN
Passcode ...
2-40
Security and Orban’s PC Remote
Application ... 2-41
Passcodes and Software Updates
...
... 2-41
ADMINISTERING THE 8500 THROUGH ITS SERIAL PORTS OR
ETHERNET ... 2-43
Connecting via Serial Port #2 Using a Terminal Program on a
PC ... 2-43
Connecting to the 8500’s Ethernet Port or Serial Port #1 via
a Terminal Program
on a PC
... 2-45
Direct Control Using
PuTTY ...
2-45
Automated Control Using
PuTTY/Plink ...
2-47
Automated Control Using Netcat
...
2-47
Administrative
Operations ... 2-48
REMOTE CONTROL INTERFACE PROGRAMMING
... 2-5
NETWORKING AND REMOTE CONTROL
... 2-57
I NSTALLING 8500 PC REMOTE CONTROL SOFTWARE
... 2-60
Installing the Necessary Windows
Services ... 2-60
Check Hardware
Requirements ... 2-60
Running the Orban Installer Program
... 2-61
Setting Up Ethernet, LAN, and VPN Connections
... 2-62
Conclusion ... 2-62
SYNCHRONIZING OPTIMOD TO A NETWORK TIME
SERVER ... 2-63
Table 2-1: NIST-referenced
timeservers ...
2-63
Updating your 8500’s
Software ... 2-66
APPENDIX: SETTING UP SERIAL COMMUNICATIONS
... 2-69
Preparing for Communication through Null Modem Cable
... 2-69
Connecting Using Windows 2000 Direct Serial
Connection: ... 2-69
Connecting Using Windows XP Direct Serial Connection
... 2-75
Preparing for Communication through Modems
... 2-79
Connecting Using Windows 2000 Modem Connection
... 2-80
Connecting using Windows XP Modem Connection
... 2-85
Section
3
Operation
... 3-1
8500 FRONT PANEL
... 3-1
I NTRODUCTION TO
PROCESSING ... 3-3
Some Audio Processing
Concepts ... 3-3
Distortion in Processing
... 3-4
Loudness and Distortion
... 3-4
OPTIMOD-FM—from Bach to Rock
... 3-4
Fundamental Requirements: High-Quality Source Material and
Accurate
Monitoring ... 3-5
ABOUT THE 8500’S SIGNAL PROCESSING FEATURES
... 3-6
Dual-Mono Architecture
... 3-6
Signal
Flow ... 3-6
ITU-R 412 Compliance
... 3-10
Two-Band Purist Processing
... 3-11
Digital Radio
Processing ... 3-11
Input/Output Delay
... 3-12
CUSTOMIZING THE 8500’S SOUND
... 3-13
Basic
Modify ... 3-13
Intermediate Modify
... 3-14
Advanced Modify
... 3-14
Gain Reduction Metering
... 3-15
To Create or Save a User Preset
... 3-15
To Delete a User Preset
... 3-16
ABOUT THE PROCESSING STRUCTURES
... 3-17
F ACTORY PROGRAMMING PRESETS
... 3-18
Table 3-1: Factory Programming
Presets ...
3-19
Equalizer CONTROLS
... 3-25
Table 3-2: Equalization Controls
...
3-26
STEREO ENHANCER CONTROLS
... 3-30
Table 3-3: Stereo Enhancer Controls
...
3-30
AGC CONTROLS
... 3-31
Table 3-4: AGC Controls
...
3-31
Advanced AGC
Controls ... 3-34
CLIPPER CONTROLS
... 3
Table 3-5: Clipper Controls
...
3-37
Figure 3-1: 0-100 kHz Baseband Spectrum (Loud-Hot
preset) ... 3-40
Figure 3-2: 19 kHz Pilot Notch Filter Spectrum (Loud-Hot
preset; detail) ... 3-40
Advanced Clipper Controls
... 3-41
THE TWO-BAND STRUCTURE
... 3-43
The Protection
Presets ... 3-44
Setting Up the Two-Band Structure for Classical
Music ... 3-44
Customizing the Settings
... 3-45
The Two-Band Structure’s Full Setup Controls
... 3-45
Table 3-6: Two-Band Controls
...
3-46
Advanced Two-Band Controls
... 3-48
THE FIVE-BAND STRUCTURE
... 3-50
Putting the Five-Band Structure on the
Air ... 3-50
Customizing the Settings
... 3-50
The Five-Band Structure’s Full Setup
Controls ... 3-51
Table 3-7: Multiband Controls
...
3-51
Table 3-8: MB Attack / Release Controls
...
3-53
Table 3-9: MB Band Mix
Controls ...
3-57
Advanced Multiband and Band Mix Controls
... 3-58
To Override the Speech/Music Detector
...
3-62
ABOUT THE 8500’ S HD / DIGITAL RADIO PROCESSING
... 3-63
Delay Difference between HD and FM Outputs
... 3-65
HD I/O Setup Controls
... 3-65
Input/Output > HD Digital Radio
screen: ...
3-65
Table 3-10: HD I/O Setup Controls
...
3-66
Digital
Output ...
3-68
Unique HD Audio Controls
... 3-69
Table 3-11: Unique HD Audio Controls (found in HD Limiting
page) ... 3-70
ITU-R MULTIPLEX POWER
CONTROLLER ... 3-71
Figure 3-3: Multiplex power over 15 minute observation
interval with Multiplex power
Controller active, measured at the Optimod’s composite
output ... 3-72
Audio Processing and the Multiplex Power Threshold Control
... 3-73
About the Multiplex Power Controller’s Time Constants
... 3-73
TEST MODES
... 3-74
Table 3-12: Test Modes
...
3-74
GETTING THE Bass SOUND YOU WANT
... 3-75
USING THE 8500 PC REMOTE CONTROL SOFTWARE
... 3-77
To set up a new connection:
... 3-78
To initiate communication:
... 3-79
To modify a control
setting: ... 3-79
To recall a
preset: ... 3-80
To save a user preset you have created:
... 3-80
To back up User Presets, system files, and automation files
onto your computer’s
hard
drive: ... 3-80
Note to Users Familiar with Older Version of PC Remote
... 3-81
To restore archived presets, system files, and automation
files: ... 3-81
To share an archived User Preset between 8500s:
... 3-83
To modify INPUT/OUTPUT and SYSTEM
SETUP: ... 3-83
To modify AUTOMATION:
... 3-83
To group multiple 8500s:
... 3-83
Operation Using the Keyboard
... 3-84
To Quit the
Program ... 3
About Aliases created by Optimod 8500 PC Remote Software
... 3-84
Multiple Installations of Optimod 8500 PC Remote
... 3-85
Section
4
Maintenance
... 4-1
ROUTINE MAINTENANCE
... 4-1
SUBASSEMBLY REMOVAL AND REPLACEMENT
... 4-2
FIELD AUDIT OF
PERFORMANCE ... 4-7
Table 4-1: Decoder Chart for Power Supervisor
... 4-10
Table 4-2: Layout Diagram of J7, with expected voltages on
each pin ... 4-10
Table 4-3: Typical Power Supply Voltages and AC Ripple
... 4-10
Section
5
Troubleshooting
... 5-1
PROBLEMS AND POTENTIAL SOLUTIONS
... 5-1
RFI, Hum, Clicks, or
Buzzes ...
5-1
Unexpectedly Quiet On-Air Levels
...
5-1
Poor Peak Modulation Control / Low On-Air Loudness
... 5-1
Audible Distortion
On-Air ...
5-2
Audible Noise on Air
...
5-3
Whistle on Air, Perhaps Only in Stereo Reception
... 5-4
Interference from stereo into SCA
...
5-4
Figure 5-1: Typical 8500 baseband spectrum with heavy
processing, 0-100 kHz. ... 5-4
Shrill, Harsh Sound
...
5-5
Dull Sound
...
5-5
System Will Not Pass Line-Up Tones at 100% Modulation
... 5-5
System Will Not Pass Emergency Alert System (“EAS” USA
Standard) Tones at the
Legally Required Modulation Level
...
5-6
System Receiving 8500’s Digital Output Will Not Lock
... 5-6
19 kHz Frequency
Out-of-Tolerance ...
5-6
L–R (Stereo Difference Channel) Will Not Null With
Monophonic Input ... 5-6
Talent Complains About Delay in Their Headphones
... 5-6
HD Output Sounds Too
Bright ...
5-6
Harsh Sibilance (“Ess” Sounds) in the HD
Channel ...
5-6
HD and FM Levels Do Not Match When the Receiver
Crossfades ... 5-6
Loudness Drops Momentarily During HD Radio Analog/Digital
Crossfades ... 5-7
HD Frequency Response is Limited to 15 kHz
...
5-7
You Cannot Set Any Output to Emit an HD Signal
... 5-7
General Dissatisfaction with Subjective Sound
Quality ... 5-7
Security Passcode Lost (When Unit is Locked Out)
... 5-8
Connection Issues between the 8500 and a PC, Modem, or
Network ... 5-8
Troubleshooting
Connections ... 5-8
You Cannot Access the Internet After Making a Direct or
Modem Connection to
the 8500:
... 5-9
OS-SPECIFIC TROUBLESHOOTING ADVICE
... 5-10
Troubleshooting Windows 2000 Direct
Connect: ... 5-10
Troubleshooting Windows 2000 Modem
Connect: ... 5-11
Troubleshooting Windows XP Direct Connect:
... 5-12
Troubleshooting Windows XP Modem Connect:
... 5-1
TECHNICAL
SUPPORT ... 5-14
FACTORY
SERVICE ... 5-15
SHIPPING INSTRUCTIONS
... 5-15
Section
6
Technical
Data
... 6-1
SPECIFICATIONS
... 6-1
Performance ... 6-1
Installation
... 6-2
CIRCUIT
DESCRIPTION ... 6-6
Overview
... 6-6
Control Circuits
... 6-7
User Control Interface and LCD Display Circuits
... 6-7
Input
Circuits ... 6-8
Output
Circuits ... 6-10
DSP
Circuit ... 6-12
Power Supply
... 6-13
ABBREVIATIONS
... 6-13
P ARTS
LIST ... 6-15
Obtaining Spare Parts
... 6-15
Base Board
... 6-16
CPU Module
... 6-17
RS-232
Board ... 6-19
Power Supply
... 6-20
Input/Output (I/O) Board
... 6-21
DSP Board (Pre-V3)
... 6-25
DSP Board
(V3) ... 6-27
Interface Board
... 6-29
Headphone Board
... 6-30
Encoder Board
... 6-31
LCD Carrier Board
... 6-31
SCHEMATICS AND P ARTS LOCATOR DRAWINGS
... 6-33