User manual
Table Of Contents
- Important Safety Instructions 2
- 1.0 Primary Checks
- 2.0 Installation
- 3.0 Warranty Information
- 4.0 Introduction
- 5.0 Features
- b: DATA Indicator
- a: Power Indicator
- c: IQ Interface Indicator
- d: Input Gate Status Display
- e: Digital Display
- f: Selector Buttons
- g: RECALL Button
- h: IR Sensor
- i: RS232 connector
- 7.0 Rear panel
- A: Audio Inputs
- B: Audio Outputs
- C: CobraNet® Connectors
- E: RS232 Serial Port
- D: IQ Loop Connectors
- F: Control Port
- G: Mains Power Inlet
- Using the PS-8810
- 8.0 Quick Install Procedure
- Hardware Installation & Connections
- Connecting to a Host Computer
- RS232 Computer Connection
- Set the Baud Rate
- Comms Problems
- Connecting the IQ Loop
- Set the IQ Address
- PS-8810 as a single loop IQ Interface
- PS-8810 in an IQ Loop system
- IQ Component Connections
- IQ Loop Wiring
- Audio Wiring
- About the Audio Inputs
- Suggested Audio Input Gain Control Settings
- Balanced Input Wiring
- Unbalanced Input Wiring
- About the Audio Outputs
- Balanced Output Wiring
- Unbalanced Output Wiring
- CobraNet® Connections
- Control Port Connections
- Modem Connection
- PC Requirements
- System Overview
- Presets and Scenes
- IQ Win Overview
- Processing Functions
- Output Level Meters
- Output Dynamic Cut/Boost Meters
- Input Level Meters
- Input Dynamic Cut/Boost Meters
- Preset Information
- Status Window
- CPU Utilisation
- DSP
- General
- Real Time Clock
- Front Panel Control Lock Out
- Data
- Interface
- LED Display Mode
- Front Panel Access
- User Labels
- Firmware Information
- Signal Path
- Input Selector
- Input Meter
- Input Select Switch
- Input Processing Selection
- Input Signal Fader, Muter, and Inverter
- Output Overview
- Inputs Window Link
- Input/Output Matrix Link
- Input Filters
- Type
- Frequency
- Gain
- Band EQ
- Shape
- Post-Processing Filters
- Input Delay
- Hardware Delays
- Input Gate
- Enable Gate
- Depth
- Static Threshold
- Hysteresis
- Signal Delay
- Attack Time
- Hold Time
- Release Time
- Side-chain Filter
- Auto-Leveler
- On/Off
- Target Level
- Max Gain
- Idle Gain
- Open to...
- Threshold
- Attack Time
- Release Time
- Input Compressor
- On/Off
- Compression Ratio
- Threshold
- Soft Knee (Width)
- Attack Time
- Release Time
- Side-chain Filter
- Priority Ducking
- Automixer
- Automixing Group Controls
- Priority Mix Enable
- Max Number of Open Mics
- Highest Open Mic Priority Indicator
- Total Number of Open Mics Indicator
- NOM Attenuation
- Adaptive Gating
- Enable
- Mode
- Step Size
- Enable
- Ambient Level Meter
- Group Gate Threshold Ambient Offset
- Ambience Weighting
- Automix Matrix
- Automixing Individual Controls
- Priority
- Depth of Cut
- Attack Time
- Release Time
- Solo/Mute
- Input/Output Matrix
- Output Path
- Output Section
- Output Delay
- Output Filters
- Ambient Leveler
- On/Off
- Sense Input
- Sense Threshold
- Program Level Dependent Mode
- Expansion Ratio
- Max Added Gain
- Attack Time
- Release Time
- Program Level Threshold
- Sense Delay
- Output Limiter
- On/Off
- Threshold
- Attack Time
- Release Time
- Output Select
- 12.0 Presets
- Preset Segue
- Scenes
- Scene Editor
- Events Scheduler
- One Time Events
- Periodic Events
- Schedule
- Explanation
- 15.0 CobraNet®
- Setup
- System Name
- System Description
- System Location
- System Contact
- Firmware Version
- MAC Address
- IP Address
- Conductor
- Status indicators
- Input
- Output
- External Control
- 16.0 Infrared Remote Control
- IR Code Editor
- Infrared Remote Control
- PS8810 IR Code Format
- 17.0 Control Port
- Digital Inputs
- Set Object(s)
- Room Combine
- Bump Object(s)
- Bump Object(s) Continuously
- Recall Preset
- Recall Scene
- Digital Outputs
- Analogue Inputs (AIN 1-8)
- Analogue Outputs
- Reference Section
- 18.0 Technical Information
- Audio
- Input Section
- DSP Processing Section
- Output Section
- 19.0 Block Diagram
- 20.0 Specifications
- 21.0 User Notes
- Untitled
- 112 -
PS-8810
DIGITAL SIGNAL PROCESSOR
Technical Description
Following is a technical description of the operation of the BSS PS-
8810.
Input Section
Each audio input signal first passes through a balanced filter
designed to eliminate RF interference. The RF filters are a
balanced network of chokes, ferrite beads, and capacitors that
attenuate both common-mode and differential-mode signals
above 500 kHz. Optional input isolation transformers are
available.
The balanced signal then enters the input switching circuit. This
circuit can insert a 25dB pad for line level signals or apply
phantom power to the input terminals (24VDC through two 2
Kohm resistors). The signal is filtered again to eliminate lower-
frequency RF energy such as interference from the AM broadcast
band.
A discrete preamp stage takes the balanced input signal and
provides 13 to 45 dB of voltage gain adjustable by a rear panel
potentiometer. The preamp output provides a single-ended
voltage output that is then coupled to a single-ended-to-
differential amplifier that also provides the bias offset needed by
the A/D converter.
A 24-bit high-resolution A/D converter samples the input audio at
48 kHz. The audio processing is set to provide +20dBu as full
scale, allowing full utilization of the dynamic range of the
converter. Each converter supplies a two-channel digital audio
stream to the DSPs for processing. One A/D converter acts as a
master to supply sampling clocks to the rest of the system. A
12.288 MHz oscillator (256 times the 48 kHz sampling rate) acts
as the master clock source.
DSP Processing Section
Four DSP processors supply all of the digital audio processing in
the unit. Serial digital audio from the input converters is sent to
the DSP board for processing. Digital audio from either the Input
board or the CobraNet board is routed to the two input DSPs.
The processors collect 16 samples of audio, then process the
18.0 Technical Information
Audio