Equipment information

Orban OPTIMOD 8400 Effect Processor
Manufacturer
Orban
Model OPTIMOD 8400
Date 2002
Category Professional music equipment
Group Effect Processor
Description Digital Audio Processor
Information
                                    8400 OPTIMOD-FM Digital Audio Processor

Orban’s all-digital 8400 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 DSP56362
Digital Signal Processing chips, the processing has
cleanliness, quality, and stability over time and
temperature that is unmatched by analog processors.
OPTIMOD-FM 8400 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 8200ST OPTIMOD-Studio Compressor/Limiter/HF
Limiter/Clipper. The 8200ST can be adjusted so that it
substitutes for the broadband AGC circuitry in OPTIMOD-FM,
which is then defeated.

OPTIMOD-FM 8400 is available in two main configurations—the
8400 has a full-featured front panel, while the 8400/PD has
a blank front panel and must be controlled by
Orban’s PC Remote application running on Microsoft Windows
98 or later. Both units have identical sound and features
except for the difference in their front panels. Both
units run the same software.
Both the 8400 and 8400/PD can accept Orban’s HD
(“High-Definition Digital Radio”) hardware plug-in, 8400HD.
8400HD adds an extra AES/EBU output to drive the digital
channel in the iBiquity system. This output provides
look-ahead peak limiting that oper-ates in parallel with the
FM peak limiting. The look-ahead limiting is optimized to make
the most of the limited bit-rate codec used in the iBiquity
system’s digital channel. By eschewing any clipping, the HD
output prevents the codec from wasting precious bits
encoding clipping distortion products, allowing the codec to
instead use its entire bit budget to encode the desired
program material. 

15 kHz band-limiting on the digital output also optimizes
the operation of the low bit-rate codec. By not wasting bits
encoding the 15-20 kHz frequency range that few radio
listeners can hear, the codec instead provides higher
quality encoding of the crucial 20-15,000 Hz band.
8400HD also adds a second analog output to the 8400 system.
This can be configured to emit the 8400’s low-latency
monitor signal, or to emit the signal that is processed for
the HD digital channel.

These manuals are available for the above equipment:

Manual Type Service and User Manual Orban-9855-Manual-Page-1-Picture
Pages 248
Size 3.20 Mbytes (3357431 Bytes)
Language english
Revision
Manual-ID/Number 96107-300-01
Date 01 January 2002
Quality Electronic document, no scan, very well readable.
Upload date
MD5 2cf79d85330edb0a4c12a60a2a29508e
Downloads 72 since 31 October 2017
Information
Manual for Version 3.0 and Higher Software

8400 OPTIMOD-FM DIGITAL AUDIO
PROCESSOR ... 1-2
User-Friendly Interface
 ... 1-3
Absolute Control of Peak Modulation
 ... 1-3
Flexible
Configuration ... 1-4
Adaptability through Multiple Audio Processing
Structures ... 1-4
Controllable ... 1-5
PRESETS IN
OPTIMOD-FM ... 1-6
Factory
Presets ... 1-6
User
Presets ... 1-6
INPUT/OUTPUT CONFIGURATION
 ... 1-6
Digital AES/EBU Left/Right
Input/Output ... 1-7
Analog Left/Right Input/Output
 ... 1-7
Stereo Analog Baseband Composite
Output ... 1-8
Subcarriers
 ... 1-8
Remote Control Interface
 ... 1-8
Computer
Interface ... 1-9
LOCATION OF OPTIMOD-FM
 ... 1-10
Optimal Control of Peak Modulation
Levels ... 1-10
Best Location for OPTIMOD-FM
 ... 1-11
STUDIO-TRANSMITTER LINK
 ... 1-13
Transmission from Studio to Transmitter
 ... 1-13
Using the Orban 8100AST (or 8100A/ST) Studio Chassis with
the 8400  ... 1-16
STL and Exciter
Overshoot ... 1-16
USING LOSSY DATA REDUCTION IN THE STUDIO
 ... 1-17
ABOUT TRANSMISSION LEVELS AND METERING
 ... 1-17
Meters
 ... 1-17
Studio Line-up Levels and Headroom
 ... 1-18
Fig. 1-1: Absolute Peak Level, VU and PPM Reading
 ... 
1-18
Transmission Levels
 ... 1-19
LINE-UP FACILITIES
 ... 1-19
Metering of Levels
 ... 1-19
MONITORING ON L OUDSPEAKERS AND HEADPHONES
 ... 1-20
EAS TEST
 ... 1-22
W ARRANTY,
FEEDBACK ... 1-23
User Feedback Form
 ... 1-23
INSTALLING THE
8400 ... 2-2
Fig. 2-1: AC Line Cord Wire
Standard) ... 
2-3
Fig. 2-2: Wiring the 25-pin Remote Interface
Connector ... 
2-5
8400 REAR PANEL
 ... 2-6
AUDIO INPUT AND OUTPUT C ONNECTIONS
 ... 2-7
Cable ... 2-7
Connectors ... 2-7
Analog Audio
Input ... 2-7
Analog Audio Output
 ... 2-8
AES/EBU DIGITAL INPUT AND OUTPUT
 ... 2-8
COMPOSITE OUTPUT AND SUBCARRIER INPUT
 ... 2-9
Fig. 2-3: Separation vs. load capacitance for 8400 and Orban
stereo encoders using 8200-style line
driver (8200, 2200, 8208, and 8218). Test frequency = 15
kHz ...  2-10
GROUNDING
 ... 2-11
Power Ground
 ... 2-1
8400 FRONT PANEL
 ... 
2-12
INSTALLATION OF STUDIO LEVEL Controller (OPTIONAL)
 ...  2-14
If you are using Orban 8200ST-Studio
Chassis ... 
2-14
Fig. 2-4: 8200ST Jumper Settings (*Factory Configuration)
 ...  2-15
If you are using Orban 464A
Co-Operator ... 
2-17
Fig. 2-5: 464A Jumper Settings
 ... 
2-17
If you are using an Orban 4000 Transmission
Limiter ...  2-19
Fig. 2-6: 4000 Jumper Locations
 ... 
2-20
Fig. 2-7: 4000 HF Limiter Jumpers
 ... 
2-20
Fig. 2-8: 4000 Pre-Emphasis Jumpers
 ... 
2-21
Fig. 2-9: 4000 Pre-Emphasis Jumpers
 ... 
2-21
Fig. 2-10: 4000 Stereo Coupling Jumpers
 ... 
2-21
QUICK
SETUP ... 
2-23
ANALOG AND DIGITAL I/O SETUP
 ... 
2-30
USING CLOCK-BASED
AUTOMATION ... 
2-39
SECURITY AND PASSCODE PROGRAMMING
 ... 
2-40
To Unlock the Front
Panel ... 
2-42
8400 User Interface Behavior during Lockout
 ... 
2-43
Default ADMIN Passcode
 ... 
2-43
Security and Orban’s PC Remote
Application ... 
2-44
Doing a Software Update to an 8400 with Version 2.1 or
Higher Already Installed: ... 
 ...  2-45
ADMINISTERING THE 8400 THROUGH SERIAL PORT #2
 ... 
2-46
Connecting to the 8400 via a Terminal Program on a PC
 ...  2-47
Administrative Operations
 ... 
2-48
Diagnostic Operations
 ... 
2-51
REMOTE CONTROL INTERFACE PROGRAMMING
 ... 
2-51
NETWORKING
 ... 
2-52
SETTING UP AN 8400 MEMORY CARD
 ... 
2-55
INSTALLING 8400 PC REMOTE CONTROL SOFTWARE
 ... 
2-56
Installing the Necessary Windows Services
 ... 
2-56
Check Hardware Requirements
 ... 
2-57
Running the Orban Installer
Application ... 
2-58
ABOUT
8400/PD ... 
2-59
ABOUT 8400HD
 ... 
2-60
Delay Difference between Digital-Channel and FM
Outputs ...  2-61
HD I/O Setup
Controls ... 
2-62
HD Audio Controls
 ... 
2-64
8400 FRONT PANEL
 ... 
3-2
INTRODUCTION 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
 ... 
3-5
Fundamental Requirements: High-Quality Source Material and
Accurate Monitoring  ...  3-5
ABOUT THE 8400’S SIGNAL PROCESSING FEATURES
 ... 
3-6
Dual-Mono Architecture
 ... 
3-6
Signal Flow
 ... 
3-6
ITU-R 412 Compliance
 ... 
3-11
Two-Band Purist Processing
 ... 
3-12
Digital Radio Processing
 ... 
3-12
Input/Output Delay
 ... 
3-13
Summary
 ... 
3-13
CUSTOMIZING THE 8400’S SOUND
 ... 
3-13
Basic Modify
 ... 
3-14
Intermediate Modify
 ... 
3-1
Advanced Modify
 ... 3-15
Gain Reduction Metering
 ... 3-16
ABOUT THE PROCESSING STRUCTURES
 ... 3-16
FACTORY PROGRAMMING PRESETS
 ... 3-17
Factory Programming Presets
 ... 3-17
Table 3-1: Factory Programming Presets
 ... 
3-19
Equalizer CONTROLS
 ... 3-24
Table 3-2: Five-Band Equalization
Controls ... 
3-24
STEREO ENHANCER
CONTROLS ... 3-28
Table 3-3: Stereo Enhancer Controls
 ... 
3-29
AGC CONTROLS
 ... 3-30
Table 3-4: AGC Controls
 ... 
3-30
Advanced AGC Controls
 ... 3-33
CLIPPER CONTROLS
 ... 3-35
Table 3-5: Clipper
Controls ... 
3-36
Fig. 3-1: 0-100 kHz Baseband Spectrum (Loud-Hot
preset) ... 
3-39
Fig. 3-2: 19 kHz Pilot Notch Filter Spectrum (Loud-Hot
preset; detail) ...  3-39
Advanced Clipper Controls
 ... 3-40
THE TWO-BAND STRUCTURE
 ... 3-41
The Protection
Presets ... 3-41
Setting Up the Two-Band Structure for Classical
Music ... 3-41
Customizing the
Settings ... 3-43
The Two-Band Structure’s Full Setup Controls
 ... 3-43
Table 3-6: Two-Band
Controls ... 
3-43
Advanced Two-Band
Controls ... 3-46
THE FIVE -BAND STRUCTURE
 ... 3-47
Putting the Five-Band Structure on the Air
 ... 3-47
Customizing the
Settings ... 3-48
The Five-Band Structure’s Full Setup Controls
 ... 3-48
Table 3-7: Multiband Controls
 ... 
3-48
Table 3-8: MB Attack/Release Controls
 ... 
3-49
Table 3-9: MB Band Mix Controls
 ... 
3-49
Advanced Multiband and Band Mix Controls
 ... 3-54
ITU-R MULTIPLEX POWER Controller
 ... 3-57
TEST MODES
 ... 3-59
Table 3-10: Test Modes
 ... 
3-59
GETTING THE Bass SOUND YOU WANT
 ... 3-60
USING THE 8400 PC REMOTE CONTROL SOFTWARE
 ... 3-62
Navigation Using the Keyboard
 ... 3-66
ROUTINE MAINTENANCE
 ... 4-2
REMOVING AND REPLACING PARTS AND ASSEMBLIES
 ... 4-2
FIELD AUDIT OF
PERFORMANCE ... 4-8
Table 4-1: Decoder Chart for Power Supervisor
 ... 
4-10
Table 4-2: Layout Diagram of J7, with expected voltages on
each pin ...  4-11
Table 4-3: Typical Power Supply Voltages and AC
Ripple ... 
4-11
PROBLEMS AND POTENTIAL SOLUTIONS
 ... 5-2
Headphones Don’t Work
 ... 5-2
RFI, Hum, Clicks, or
Buzzes ... 5-2
Poor Peak Modulation Control
 ... 5-2
Audible Distortion On-Air
 ... 5-3
Audible Noise on
Air ... 5-3
Whistle on Air, Perhaps Only in Stereo Reception
 ... 5-4
Interference From Stereo Into SCA
 ... 5-5
Shrill, Harsh Sound
 ... 5-6
Dull Sound
 ... 5-6
System Will Not Pass Line-Up Tones at 100% Modulation
 ... 5-6
System Will Not Pass Emergency Alert System (“EAS” USA
Standard) Tones at the Legally
Required Modulation
Level ... 
5-6
System Receiving 8400’s Digital Output Will Not
Lock ...  5-7
19 kHz Frequency Out-of-Tolerance
 ... 
5-7
L–R (Stereo Difference Channel) Will Not Null With
Monophonic Input ...  5-7
General Dissatisfaction with Subjective Sound
Quality ... 
5-7
Security Passcode Lost (When Unit is Locked
Out) ... 
5-7
Connection Issues between the 8400 and a PC, Modem, or
Network ...  5-8
Troubleshooting Connections
 ... 
5-9
OS-Specific Troubleshooting
Advice ... 
5-9
TROUBLESHOOTING IC OPAMPS
 ... 
5-14
TECHNICAL S
UPPORT ... 
5-15
FACTORY SERVICE
 ... 
5-15
SHIPPING INSTRUCTIONS
 ... 
5-15
SPECIFICATIONS
 ... 
6-2
Performance ... 
6-2
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
 ... 
6-12
ABBREVIATIONS
 ... 
6-13
PARTS LIST
 ... 
6-14
Obtaining Spare Parts
 ... 
6-15
Power Supply
 ... 
6-15
Input/Ouput Circuit
Board ... 
6-16
Front Panel
Subassembly ... 
6-18
Display Circuit Board
 ... 
6-18
Display Interface Circuit
Board ... 
6-19
Composite Input/Output Circuit
Board ... 
6-20
Control Circuit Board
 ... 
6-20
SCHEMATICS, ASSEMBLY DRAWINGS
 ... 
6-21
Figure 6-1: Main Circuit Board
Locator ... 
6-22
Orban-9855-Manual-Page-1-Picture


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