Lexicon 300L Effect Processor
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Modello:
300L
Data:
1996
Categoria:
Gruppo:
Descrizione:
Digital Effects Processor
Tipo di manuale:
Manuale di servizio
Pagine:
106
Dimensione:
319.76 Kbytes (327437 Bytes)
Lingua:
english
Revisione:
ID del manuale:
070-11474
Data:
1996 01 01
Qualità:
Documento scansionato, tutto leggibile.
Data caricamento:
2017 09 13
MD5:
fea36057b6cf2373f90dd8df2fcbf2da
Scaricamenti:
1542
Informazioni
1. 300L Controls and Connectors
Mounting
...
1-2
Power Requirements
...
1-2
Rear Panel
...
1-3
Connectors and Cables
...
1-4
About the LARC
...
1-6
How to Interface the LARC
... 1-7
Setting Analog Audio Levels
... 1-8
Periodic Maintenance
...
1-10
Ordering parts
...
1-10
Returning units for service
... 1-10
Table of Contents
2. Performance Verification
Introduction
...
2-2
Initialization and Inspection
... 2-3
Power Supply
...
2-4
Power Fail
...
2-5
Timecode Tests
...
2-5
Listening
...
2-6
Audio Proof of Performance
... 2-7
Level Test • Frequency Response • Noise • THD
Crosstalk • Power Up • Shock
DSP Board Troubleshooting
... 2-10
Cable Connections
...
2-10
Audio Problems
...
2-11
One Channel Bad • Both Channels Bad • No Output
No Output with no relay click on power up • Effects don't
sound the same as when stored • The LARC control head
will not light • Touching a LARC slider resets unit
Audio Precision ATE Test Descriptions
... 2-13
3. Circuit Description
Architectural Overview
...
3-2
Host Board
...
3-3
68008 Bus Interface
...
3-5
Interrupts
...
3-6
Memory
...
3-6
The DUART
...
3-7
Duart Interrupts • DUART Input/Output Ports • DUART Input
Ports • DUART Output Ports
Time Code Chip Select
...
3-9
Limits of Operation
...
3-9
System Clock Generation Circuits
... 3-11
Master Clock • Clock Source • Sample Clocks
Phase-Locked Loop
...
3-12
The Phase Comparator • Loop Filter • The VCO
Input/Output Audio Level Strobe
... 3-13
Z80 DMA Access
...
3-14
Digital Interface Board
...
3-17
AES/EBU Interface • EIAJ CP-340 Interface • Time
Code Input • EMI Considerations
DSP Board
...
3-18
DSP Slaves - Lexichips
...
3-19
Z80 Control Processors
...
3-19
Z80 DMA Interface • Slave Control Status Registers
Slave Status Registers
...
3-21
Wait State Generation
...
3-22
Audio Routing Data
...
3-22
Routing Implementation • Input Routing • Output Routing
Lexichip I/O
...
3-24
Lexichip Input • Lexichip Output • Inter-Lexichip
Communication
Digital Filter
...
3-25
Peak-Detect
...
3-26
MIDI
...
3-26
Audio RAM Boards
...
3-26
Analog Boards
...
3-27
Analog I/O Board • Analog Motherboard • Differential Input
Circuitry • Programmable Input Gain Circuitry • Pre-Emphasis/
Input • Offset Servo • A/D Conversion • D/A Conversion
Output Filtering • Programmable Output Gain Circuitry
Balanced Output Driver • Voltage Regulators and Relay
Drivers
Power Supply Board
...
3-30
LARC
...
3-31
Power Supply • CPU • Reset Logic • Address Decoding
Logic • ADC Logic • UART Logic • RS-422 Logic • Litronix
Display Logic • Buffered Bus and Sink Logic
Specifications
Parts List