Orban OPTIMOD 6200

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5-8

TROUBLESHOOTING Orban Model 6200

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Table of Contents9
Index15
Reading this Manual20
6200 OPTIMOD-DAB Digital Audio Processor20
User-Friendly Interface21
Flexible Configuration21
Adaptability through Multiple Audio Processing Structures22
Controllable22
Presets in OPTIMOD-DAB23
Factory Processing Presets23
User Presets23
Input/Output Configuration24
Digital AES/EBU Left/Right Input/Output24
Analog Left/Right Input/Output24
Studio-Transmitter Link25
Transmission from Studio to Transmitter25
Location of OPTIMOD-DAB28
At the Transmitter Is Best28
Where Access to the Transmitter Plant Is Not Possible28
OPTIMOD-DAB at the Transmitter: Gain Control before the STL29
Using Lossy Data Reduction in the Studio29
Interfacing to the Transmitter30
Sync Input30
Sample Rate and Audio Bandwidth30
Subframe Delay31
Program-Associated Data (PAD)31
Setting Modulation Levels31
Monitoring on Loudspeakers and Headphones32
EAS Test33
Security Pascode for PC Control34
DTV Applications34
Using the 6200 in the United States DTV System34
Audio Processing for Consistency and Loudness Control36
A Hybrid Technique for DTV Processing36
Advantages of Multiband Compression in DTV Audio37
Using the 6200 in the 5.1 Channel Plant38
Bypassing the Loudness Controller38
The 6200 in 2-Channel DTV Applications38
Webcasting Applications39
Using the 6200 in Streaming Applications39
Using the 6200 in Non-Streaming Applications, to Prepare Audio Files for Download40
Decoder Headroom40
Loudness40
Choosing Your Encoder41
Mp341
Warranty, Feedback41
User Feedback Form41
Installing the 620044
6200 Rear Panel49
Audio Input and Output Connections50
Cable50
Connectors50
Analog Audio Input50
Analog Audio Monitor Output51
AES/EBU Digital Input and Output52
Grounding52
Power Ground53
Circuit Ground53
6200 Front Panel53
Installation of Studio Level Controller (Optional)55
If You Are Using Orban 8200ST-Studio Chassis55
If You Are Using Orban 464A Co-Operator59
If You Are Using an Orban 4000 Transmission Limiter61
System Setup65
Analog I/O Setup66
Digital I/O Setup72
Security and Pascode Programming77
Remote Control Interface Programming78
6200 Front Panel82
Introduction to Processing83
Some Audio Processing Concepts83
Distortion in Processing83
Loudness and Distortion84
OPTIMOD-DAB - from Bach to Rock84
Customizing the 6200'S Sound85
Less-More85
Full Control86
Fundamental Requirements: High-Quality Source Material and Accurate Monitoring86
About the Processing Structures86
Factory Programming Presets87
The Protection Limiter Structure93
Setting up the Protection Limiter93
Protection Limiting: Orban's Approach94
Equalization Controls96
The Two-Band Structure100
Setting up the Two-Band Structure100
Gain Reduction Metering101
Using the Two-Band Structure for Classical Music101
The Two-Band Structure's Full Setup Controls102
The Multi-Band Structure106
Putting the Multi-Band Structure on the Air107
Customizing the Settings107
The Multi-Band Structure's Full Setup Controls108
Test Modes115
Using the 6200 for Mastering115
Limitations in Mastering Applications117
Routine Maintenance120
Getting Inside the Chassis120
Field Audit of Performance126
Problems and Possible Causes136
RFI, Hum, Clicks, or Buzzes136
Poor Peak Modulation Control136
Audible Distortion On-Air136
Audible Noise On-Air137
Shrill, Harsh Sound137
System Receiving 6200'S Output will Not Lock138
System will Not Pass Line-Up Tones at 100% Modulation138
System will Not Pass Emergency Alert System ("EAS" USA Standard) Tones at the Legally-Required Modulation Level138
General Dissatisfaction with Subjective Sound Quality138
Excessively Loud Commercials (DTV Applications)138
Inconsistent Levels (DTV Applications)139
Incorrect Lip Sync (DTV Applications)139
Troubleshooting IC Opamps139
Technical Support140
Factory Service140
Shipping Instructions141
Specifications144
Circuit Description148
Overview148
12.288Mhz Oscillator and System Clocking148
Microprocessor and Power Monitoring Circuit150
RAM, ROM and EEPROM151
Data Latches, Tri-State Data Buffers and Address Decoders151
User Control Interface and LED Display Circuits151
Switch Matrix and LED Indicators152
LED Meter Circuits152
Input Circuits153
Analog Input Stages153
Stereo Analog-To-Digital (A/D) Converter154
Digital Input Receiver and Sample Rate Converter (SRC)154
Digital Sync Input Receiver155
Output Circuits156
Stereo Digital-To-Analog (D/A) Converter156
Analog Output Stages157
Digital Sample Rate Converter (SRC) and Output Transmitter158
DSP Circuits159
Power Supply160
Parts List162
Obtaining Spare Parts163
Schematics, Assembly Drawings172
Abbreviations192

Orban OPTIMOD 6200 - Page 142

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