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
- 33 -
PS-8810
DIGITAL SIGNAL PROCESSOR
As implemented in the BSS PS-8810 the IQ Loop is a 20-mA
current loop operating at a baud rate of 38.4kbps. The IQ Loop
must be unbroken.
The IQ Loop connection can use inexpensive twisted-pair wiring
(shielded or unshielded). Here are some guidelines for twisted-
pair wiring:
• When interference is a problem, use shielded twisted-pair
wire at least 26 AWG in size. The wire should be of good
quality and should have low capacitance (30 pF/foot or less
is suitable).
The shield serves two purposes:
1 It helps prevent the IQ data signal from transmitting to
nearby audio wiring.
2 It helps prevent outside RF from interfering with the data
signal. However, in most cases interference is not a problem
and, since unshielded wire has lower capacitance, it is a
better choice for typical applications.
• Minimize the total capacitance of an IQ Loop. The total
combined capacitance for a IQ Loop should be less than 30
nF. To calculate this, allow approximately 60 pF for each IQ
component in a loop. This accounts for a slight signal
degradation which occurs as data signals pass through a
component.
• Add an IQ Repeater for very long loops—greater than 1,000
feet (305 m)—or when required by high-capacitance wire.
Although BSS recommends adding a repeater for loops longer
than 1,000 feet, it is sometimes possible to go 2,000 feet (610 m)
or more before a repeater is required. The most significant factor
in determining maximum loop length is wire capacitance. Lower
capacitance will allow longer loops (unshielded wire usually has
lower capacitance).
Outside RF interference is seldom a problem for an IQ Loop
especially if shielded twisted-pair wire is used. However, there
are extreme situations when fibre optic wiring is recommended. For
example, locating a IQ Loop next to an AM radio transmission line
may require fibre optic cabling. An extremely long IQ Loop
distance may also require fibre optic cabling. Contact BSS If fibre
optic cabling is required.
Connections IQ Loop
IQ Loop Wiring