Orban OPTIMOD-FM 8100A/1 User Manual

I
1
5-8 GETTING THE SOUND YOU WANT
5-8 To Obtain More Loudness
5-8 To Obtain More Brightness
5-8 To Obtain More Bass
5-8 To Obtain Less Bass
5-8 To Make " Air" Sound Most Like " Prcgram"
5-9 To Obtain " Open" Sound
5-9 To Obtain A " Heavily- Processed" Sound
5-9 To Avoid " Noise Pump- Up"
5-9 To Achieve More Subtle Gain Riding
On Wide- Dynamic Range Material
5-9 To Avoid Excessive Sibilance
6: SYSTEM PERFORMANCE VERIFICATION
6-1 Mono Performance Verification
6-1 Stereo Performance Verification
6-1 Main Channel
6-2 Subchannel
6-2 Separation
6-3 Crosstalk
6-3 38kHz Subcarrier Suppression
6-3 Pilot Frequency
6-3 Fig. 6-1: Pilot Frequency Test Point
6-4 Pilot Injection
6-4 Rear- Panel TEST Jacks
7: ROUTINE MAINTENANCE
7-1 General
7-1 Routine Performance Verification
7-1 Stereo Generator Tests
7-1 Dynamic Separation
7-2 38kHz Suppression
7-2 Pilot Injection
7-2 Audio Processing
APPENDICES
I APPENDIX A: SYSTEM DESCRIPTION
A-1
I A- 1
A-1
A-2
A-2
g A-3
A-3
A-4
General
Input Amplifier
30Hz Highpass Filter
Allpass Phase Scrambler And Preemphasis/Deemphasis
Dual- Band " Master/Bass" Compressor
Crossover And Bass Clipper
Voltage- Controlled Amplifier Operation
Compressor Control Circuitry
A-5 Phase- Corrected Lowpass Filter/Preemphasis
A-5 High Frequency Limiter
A-6 FM Smart Clipper
A-7 Clipper With Dynamic Threshold
A-7 15kHz Phase- Corrected Lowpass Filter
A-7 Distortion- Cancelling Sidechain
A-8 Frequency- Contoured Sidechain Overshoot Compensator
A-9 Stereo Generator:
A-10 19kHz Oscillator
A-10 19kHz Doubler
A-10 38kHz Filter And Phase Shifter
A-10 38kHz AGC Loop
A-10 38kHz Phase- Locked Loop
A-11 Stereo Modulator
A-12 Mode Switching Logic
A-12 Power Supplies
APPENDIX B: CIRCUIT DESCRIPTION
B-1 General
B-1 Input Amplifier
B-1 30Hz Highpass Filter
B-2 Allpass Phase Scrambler And Preemphasis/Deemphasis
B-2 Dual- Band " Master/Bass" Compressor
B-2 Crossover And Bass Clipper
B-2 Voltage- Controlled Amplifier Operation
B-3 Compressor Control Circuitry
B-5 Gain Reduction Metering
B-6 Gating Circuitry
B-6 Phase- Corrected Lowpass Filter/Preemphasis
B-7 Differential Preemphasis And High Frequency Limiter
B-7 High Frequency Limiter Control Circuitry
B-8 FM Smart Clipper
B-8 Clipper With Dynamic Threshold
B-9 15kHz Phase- Corrected Lowpass Filter
B-10 2.2kHz Distortion- Cancelling Sidechain
B-10 Frequency- Contoured Sidechain Overshoot Compensator
B-11 Stereo Generator:
B-11 19kHz Oscillator
B-12 19kHz Doubler
B-12 38kHz Filter And Phase Shifter
B-13 38kHz AGC Loop
B-13 38kHz Phase- Locked Loop
B-14 L- R Amplifier
B-15 38kHz Doubly- Balanced Modulator
B-16 L+R/Mono Path
B-17 Output Summing Amplifier
B-17 Mode Switching Logic
B-17 Unregulated Power Supply
B-18 + 15 Volt Regulator
B-19 - 15 Volt Regulator
B-19 Miscellaneous Voltage Supplies

Orban OPTIMOD-FM 8100A/1 Specifications

General

Brand	Orban
Model	OPTIMOD-FM 8100A/1
Category	Computer Hardware
Language	English