BSS Audio FDS366T OMNIDRIVE User Manual
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BSS Audio FDS366T OMNIDRIVE User Manual

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Summary of Contents for BSS Audio FDS366T OMNIDRIVE

  • Page 1 ™ FDS-366T OMNIDRIVE User Manual Connect here first...

  • Page 2: Important Safety Information

    EMC performance. The FDS-366T Omnidrive was designed and developed by BSS Audio, Hertfordshire, UK. In keeping with our policy of continued improvement, BSS Audio reserves the right to alter specifications without prior notice. - 2 -...

  • Page 3: Table Of Contents

    FDS-366T Contents FDS-366T Omnidrive compact plus 1.0 Primary Checks ..................8 2.0 Installation ....................8 3.0 Warranty Information ................9 About the FDS-366T Omnidrive Compact Plus ....... 10 4.0 Introduction .................... 11 5.0 Features ....................12 What is DEQ? ....................16 6.0 Dynamic Equalisation ................
  • Page 4 FDS-366T Unbalanced wiring ......................34 MIDI ........................... 35 RS232 Serial ........................35 RS485 Serial ........................35 Program Select Port ......................36 12.0 Navigation ....................37 The Navipad ....................37 The Rotary Encoder ..................37 13.0 Default Screen ..................38 14.0 Quick Start Guide .................. 39 Keep relative delays while delaying a group ...............
  • Page 5 FDS-366T 18.0 Utilities ....................53 1. Configuration........................54 2. Stereo Link ........................54 3. Sum Type ........................54 5. Phase Comp ........................55 4. Xover Adjust ........................55 6. Alignment Assistant ......................56 Method ..........................56 Microphone placement and connection ................56 Procedure...........................
  • Page 6 FDS-366T 4. Dynamic EQ ........................72 1. Gain ..........................72 DEQ ........................... 73 Thr (Threshold) ........................73 Ratio ..........................73 Attack and Release ......................74 Atk (Attack) ......................... 74 Rel (Release) ........................74 20.0 Output Channels ..................75 1. Name ..........................76 2.
  • Page 7 FDS-366T Reference Section ................86 21.0 Serial Communications ................. 87 MIDI ........................... 87 MIDI with PC Control......................88 Synchronous Control ......................88 RS232 ..........................89 RS485 & Multidrop ......................90 22.0 Troubleshooting ..................94 23.0 FDS-366T Omnidrive MIDI Implementation ........95 A.1 FDS-366T MIDI Implementation ............

  • Page 8: Primary Checks

    FDS-366T Primary Checks As part of BSS' system of quality control, this product is carefully inspected before packing to ensure flawless appearance. After unpacking the unit, please inspect for any physical damage and retain the shipping carton and ALL relevant packing materials for use should the unit need returning.

  • Page 9: Warranty Information

    FDS-366T Warranty Information When sold to an end user by BSS Audio or a BSS Audio Authorised Reseller, this unit is warranted by the seller to the purchaser against defects in workmanship and the materials used in its manufacture for a period of one year from the date of sale.

  • Page 10: About The Fds-366T Omnidrive Compact Plus

    FDS-366T About the FDS-366T Omnidrive Compact Plus - 10 -...

  • Page 11: Introduction

    FDS-366T Introduction Introducing the BSS Audio FDS-366T Omndrive Compact Plus, an incredibly powerful loudspeaker management system in only 1U of rackspace! Based on BSS Audio's many years of experience building analogue processing devices for the live sound and installed markets, the FDS-366T Omnidrive is an 'all in one' solution for system crossover assignment, EQ, delay and dynamics control.

  • Page 12: Features

    FDS-366T Features Individual keys to select input and output channels for editing. Crossover slopes of 6,12, 18, 24 or 48dB per octave. Filter types:Butterworth, Bessel, Linkwitz-Riley and WHISEWORKS- NTM*. Comprehensive output limiters on each band (mid-filter). Equalisers and 'dynamic' equalisers on each input and output. High resolution input and output delays up to 2.6 seconds in approximately 11 microsecond steps.
  • Page 13 FDS-366T Features Some of the features are explained in greater detail here. • 96kHz Sample rate The FDS-366T operates the A-D and D-A converters and the Digital Signal Processing (DSP) at a sample rate of 96kHz. The use of a higher Nyquist frequency enables the audio bandwidth to extend all the way up to 40kHz.
  • Page 14 FDS-366T Features • Alignment Assistant The Alignment Assistant is an advanced loudspeaker measurement function built-in to the FDS-366T for directly measuring the delay and phase relationships between drivers (using a measurement microphone), and automatically adjusting the settings to accommodate these. The Alignment Assistant has the ability to ‘see’...
  • Page 15 FDS-366T Features • Safe mode The FDS-366T has a hidden function called 'Safe'. 'Safe' mode is intended to be used as a complete lock-out for installations or as the ultimate protection for hire systems etc. When SAFE mode is switched on, all controls are disabled, the screen blanks and the backlight is dimmed.
  • Page 16 FDS-366T Typical Applications The FDS-366T has three inputs: A, B, C. An internal mono sum of inputs is also available for routing to any of the outputs. Many combination of routing inputs to outputs is available, and the FDS-366T can be configured as a stereo or mono device.
  • Page 17 FDS-366T Typical Applications Triple Bi-amp The FDS-366T can provide 3 channels of bi-amp crossover for monitor racks with EQ, delays, and limiters. With so much EQ available in the FDS-366T, it (Stage monitors) is easy to assign 12 bands of EQ to the input, as well as EQ to the output bands, saving the need for external EQ.
  • Page 18 FDS-366T Typical Applications Mono 6-way In the mono mode, the FDS-366T can provide a full 6-way system. It can also function as a 5-way system fed from input A, with an independent sub-bass output fed from the sum of inputs A & B or input C. Stereo 6-way Two FDS-366Ts working in this mode can form a stereo 6-way system.

  • Page 19: Crossover Shapes And Frequencies

    FDS-366T Crossover Shapes and Frequencies It is not possible to provide one loudspeaker driver to cover all audible frequencies. Even if the frequency response could be achieved, the large size of the driver required to shift enough air at low frequencies would offer an impossibly directional beam at high frequencies because at small wavelengths, the differing path lengths from the extremities of the diaphragm to the listener would cause cancellations off-axis.
  • Page 20 FDS-366T Crossover Shapes and Frequencies The graphs on this page show the filter slope curves with associated crossover points in order to aid the sound technician in the choice of filter shape to use for the desired result between speaker drivers of differing specifications and characteristics.
  • Page 21 FDS-366T Crossover Shapes and Frequencies WHISEWORKS-NTM The WHISEWORKS-Neville Thiele Method (NTM) crossover filter is a new type of electrical/acoustical filter offering significant performance advantages Crossover over all previous crossover filter types in audio applications. The filter was developed by Neville Thiele (pronounced “Teel”). This filter uses a unique notched response to achieve a very steep roll-off rate outside the passband.

  • Page 22: Crossover Comparison Chart

    FDS-366T Crossover Shapes and Frequencies Crossover Below is a chart comparing the different crossover filter types that are provided in the FDS-366T Omnidrive. This table should help to ascertain the comparison chart particular choice of filter dependant on application. Shapes marked with an asterisk * will require polarity inversion.

  • Page 23: Phase Compensation

    FDS-366T Crossover Shapes and Frequencies Phase Phase compensation to active crossovers was introduced in the classic FDS- 355 Omnidrive Compact Loudspeaker Management System. The FDS-366T Compensation Omnidrive includes this feature, freeing the user of worry about phase alignment between bands. More info about Phase Compensation: A properly designed 2 way crossover always exhibits the inter-band phase relationships that are characteristic of the chosen crossover shape.
  • Page 24 FDS-366T Dynamic Equalisation What is DEQ? The BSS DPR-901 Analogue Dynamic Equaliser was a revolutionary way of dealing with equalisation, and was made possible by the subtractive progressive knee technique developed for the industry-standard DPR-402 Analogue Compressor. The very same techniques are used in the FDS-366T to give you dynamic control of equalisation, or indeed for conventional full-range compression on every input and every output.
  • Page 25 FDS-366T Dynamic Equalisation Notes and Uses Frequency selective compressing Conventional compressors affect the whole audible band of frequencies equally. Some compressors can be configured to only start compression when they encounter given frequencies, however, once they start compressing they compress the whole audio band. This is quite distinct from the type of compression available in the FDS-366T DEQ.
  • Page 26 FDS-366T Dynamic Equalisation Dynamic bass and treble enhancement The bass and treble content of the program can be made to appear louder without increasing the overall sound level if the middle frequencies of the program are reduced when the sound level approaches the limit. This can be especially useful to squeeze the last few dB of perceived headroom out of a The parametric equaliser associated with the Dynamic Equaliser is much like the other EQs in the FDS-366T (and may in fact be used as a conventional...
  • Page 27 FDS-366T The Rear Panel and Connections - 27 -...

  • Page 28: Rear Panel

    FDS-366T Rear panel Mains power input The power inlet for the FDS-366T. Note that there is no On/Off switch for the unit. Accepted voltage range: 90-240V AC 50/60Hz, autosensing. Fuse In the event of failure due to mains overload only replace with T1A fuse as stated on the unit.

  • Page 29: Voltage Setting

    FDS-366T 10.0 Connections - Mains Power Mains Power IMPORTANT: The wires in the mains lead are colour coded in accordance with the following code. Green and Yellow = Earth Blue = Neutral Brown = Live If the colours of the wires in the mains lead do not correspond with the identifying markings on the terminals in your plug refer to the following: ...

  • Page 30: Connections - Mains Power

    FDS-366T Connections - Mains Power AC Power fusing The incoming mains power is protected within the FDS-366T by a fuse in the holder mounted on the rear panel. In the event that a mains fault occurs and blows this fuse always replace with an identical 20mm x 5mm 'T' fuse, rated at 1A for continued protection from equipment damage and fire.

  • Page 31: Connections - Audio

    FDS-366T Connections - Audio The FDS-366T has three balanced Inputs and six balanced Outputs that can Audio accommodate both balanced and unbalanced signals. Note: Because the FDS-366T outputs can be programmed for any passband, caution must be taken when connecting the outputs to the amplifiers. The connection of low frequency signals to high frequency drivers could cause serious damage - this is not covered by warranty.

  • Page 32: Unbalanced Wiring

    FDS-366T Connections - Audio Unbalanced wiring A fully balanced system will yield the best possible results with none of the problems often associated with interconnected audio equipment. However, if the equipment driving the FDS-366T has only unbalanced outputs then the input plug to the FDS-366T should be wired so that the shield connection on pin 1 is shorted to either pin 2 or pin 3, depending on the wiring convention of the unbalanced equipment at the sending end.

  • Page 33: Midi

    An RS-232 connector allows updating of the flash memory via a PC (as system firmware updates become available - check our website, www.bss.co.uk for updates) and also for other software packages such as Smaart or Soundbench to control the FDS-366T.

  • Page 34: Program Select Port

    Using 8 momentary switches as above or, using a rotary selector with a momentary switch to trigger the program change, see below. A BSS Soundweb 'control port' could be used to trigger these program changes by assigning LEDs to the control port 'logic outs' and using 'parameter presets' to switch programs.
  • Page 35 FDS-366T Using the FDS-366T Omnidrive Compact Plus - 35 -...

  • Page 36: Main Display

    FDS-366T 11.0 Front Panel STORE /ENTER key Program data can be stored to either internal memory, or a PC card, and is done by using the store facility. This key also doubles as an ENTER key for confirmation of some programming actions. RECALL key Program data can be recalled to the unit from either internal memory or a PC card using the recall facility.

  • Page 37: Mute Button

    FDS-366T Front Panel SUM button Quick access to the Input Sum parameter screens. PC card slot The card slot is used for storing/recalling program data via a standard type 2 PC card. Note that the card only inserts up to about a third of its length.

  • Page 38: 12.0 Navigation

    FDS-366T 12.0 Navigation The Navipad To the left of the display screen there is a four way rocker selector switch. This enables navigation through the various screens and to both select a parameter to adjust (^/v) and to fine adjust the value of the currently selected parameter (<...

  • Page 39: 13.0 Default Screen

    If Lock Out mode in the Utilities is "On", the default screen will be replaced by the standard BSS logo or one of the users choice, see the section on loading custom logos for more information on personalising your Omnidrive.
  • Page 40 FDS-366T 14.0 Quick Start Guide This section describes how to get started using the FDS-366T Omnidrive. If you are unsure about how to use this product please take the time to study this manual before attempting to deploy the unit in earnest. The FDS-366T is a very capable device and as such, knowledge of both audio sound systems and the way that the Omnidrive integrates with them is required, especially to achieve the best results.

  • Page 41: Quick Start Guide

    FDS-366T Quick Start Guide Getting going with • Program recall a preconfigured If the FDS-366T has already been configured with a suitable program, you only need to use the recall mode to set the parameters to that program. program Be aware that different programs may contain inappropriate routings and EQ/Limiter settings for your particular system so care should be exercised when selecting the correct program.
  • Page 42 FDS-366T Quick Start Guide Setting up a system The overall configuration of the FDS-366T is the first parameter that needs to be set. Decide whether the unit needs to run as a stereo 3 way, mono up to 6 way or as a 3 channel 2 way device. •...
  • Page 43 FDS-366T Quick Start Guide Use the navipad ^/v keys to select the delay screen. The delay is adjusted using the rotary encoder. Default settings for display and adjustment of delay is in meters (m), but can be changed to milliseconds (ms), feet/inches (ft) or frames per second (fps) using the "Delay Units"...
  • Page 44 FDS-366T Quick Start Guide When you have set up the Omnidrive it is essential to store your settings so that they can be recalled should the power be removed from the unit. Press the STORE button to enter the store mode. Select an unused program location from the list, the Omnidrive will move the cursor to the naming area of the screen.

  • Page 45: Keep Relative Delays While Delaying A Group

    FDS-366T 15.0 Quick Reference - How to ... Use delays for The best way to do this is to have a good idea of the physical positions of the voice coils of the drivers in the cabinet. If you do not know this, an estimate driver alignment can be made, but it may take a while longer.

  • Page 46: Quick Reference - How To

    The frequency and boost values may need slight adjustment to give the best results. Load custom logos Custom logos can be loaded into the FDS-366T using the 366Load.exe loader program (available from our web site, www.bss.co.uk). • These logos must be in .GIF 87a (non-interlaced) format. •...

  • Page 47: Programming Functions In Depth

    FDS-366T Programming functions in depth - 47 -...

  • Page 48: Recalling A Program

    FDS-366T 16.0 Program Functions The FDS-366T has 60 internal program memories which should be plenty of storage space for most applications. However it is always good practice to back up your programming work and this can be achieved in several ways. Programs can be saved to a PC card (refer to the next chapter for more information on the use of PC cards) or 'dumped' via MIDI into either another FDS-366T or a computer/midi data storage medium for later recall.

  • Page 49: Storing A Program

    FDS-366T Program Functions Storing a Program STORE type Program Lock status Owner locked Program OEM locked Program OEM & Owner locked Program Program Name Program number Familiarise yourself with the method for storing programs as this must be done to memorise any editing that you may have done to your system set up. •...
  • Page 50 FDS-366T Program Functions Store Type There are 3 ways in which data can be stored, and these are indicated by the store type message at the top of the display. To highlight the Store type message, use the navipad 'v' key while a program number is highlighted. Once highlighted, turn the rotary encoder to select the type of store you wish to use.

  • Page 51: Delete Program

    FDS-366T Program Functions Delete Program To delete a program press the UTILS button and scroll through the options until the screen on the left is displayed. To enter the Delete Program mode, press either > or turn the encoder clockwise, this will change the screen to: Choose the program to be deleted using the <...

  • Page 52: Card Types

    FDS-366T 17.0 PC Card Usage Card types The program memories of the FDS-366T Omnidrive can be saved to PC cards for further storage, safety backup and portability between systems. Note that the PC card only inserts up to about a third of its length into the front panel slot.

  • Page 53: Pc Card Usage

    FDS-366T PC Card Usage Computer BSS has tested and developed the card filing system using an IBM compatible PC card reader and a range of palm-top computers, but cannot guarantee that compatibility the cards can be read by any particular piece of computer equipment.

  • Page 54: 18.0 Utilities

    FDS-366T 18.0 Utilities The Utilities contain settings for the FDS-366T that are of a more general Introduction operational nature, rather than particularly related to the individual function of the input and output channels. Pressing the UTILS button or pushing the navipad '^' key while viewing the 'default' screen will display the Utilities menu.
  • Page 55 FDS-366T Utilities - Configuration & Routing Configuration "Mono", "LMHLMH", "LLMMHH" or "LHLHLH" Configuration defines the general operating mode for the FDS-366T; either Mono, Dual/Stereo 2-Way or Stereo 3-way. The rotary encoder is used to select the desired configuration. • "Mono" mode assigns all outputs from input A. •...

  • Page 56: Phase Comp

    FDS-366T Utilities - Crossover Adjustment/Phase Comp Xover Adjust "Both" or "Edge" The Xover Adjust determines how crossover points are adjusted relative to the corresponding edge of the adjacent band. The following options may be selected: BOTH When set to BOTH, both the upper band edge of the lower band and the lower band edge of the upper band are adjusted as a pair.

  • Page 57: Alignment Assistant

    FDS-366T Utilities - Alignment Assistant Alignment The Alignment Assistant is an advanced loudspeaker measurement function built-in to the FDS-366T for directly measuring the delay and phase Assistant relationships between drivers (using a measurement microphone), and automatically adjusting the settings to accommodate these. The Alignment Assistant has the ability to ‘see’...

  • Page 58: Procedure

    FDS-366T Utilities - Alignment Assistant Procedure The alignment assistant takes you step-by-step through the various stages of the process starting with the "SELECT OPTIONS" screen. Determine which parameters are to be measured and adjusted. • Output Delays are used for correcting for discrepancies in distance or phase between adjacent drivers in a cabinet or stack.

  • Page 59: Adjusting The Stimulus Level

    FDS-366T Utilities - Alignment Assistant Adjusting the As you increase the stimulus level, the microphone amplifier in the FDS-366T will automatically adjust it’s gain to try to obtain a good level. You may stimulus level therefore not see the input C bargraph value changing once it gets close to full- scale.

  • Page 60: Notes

    FDS-366T Utilities - Alignment Assistant Notes Which parameters get overwritten? Some parameters get overwritten by running Alignment Assistant. If you have valuable settings in place it is recommended that you save the current setup to a new program location before activating Alignment Assistant.
  • Page 61 If the microphone is phantom powered, it must be capable of operating at a phantom voltage of at least 15V. We recommend the BSS FPC900-MIC for this application. - 61 -...

  • Page 62: Delay Corrn (Correction)

    FDS-366T Utilities - Adjustments, Units and Screen Delay Corrn "Off", "Manual" or "MIDI" (Correction) Corrects the implementation of delay in the unit to compensate for ambient temperature. This facility works in tandem with the Temperature utility. With Delay Corrn (correction) set to 'Off', the default temperature is set to 20 C.

  • Page 63: Owner Lock

    Brightnesss and Contrast and, of course, the Lock Out itself. The screen will display either the unit's BSS logo or any custom logo that has been loaded, (see the Quick Reference section for more details on how to load your own custom logo).

  • Page 64: Setting Up 'Owner' Locks

    FDS-366T Utilities - Security Lock Outs - Owner lock Setting up 'Owner' To activate the Owner Lock go to the Utilities, select "Owner Lock" and turn the rotary encoder clockwise. Locks Enter the default password, which is "OMNI" for Owner Lock, by turning the rotary encoder to change the displayed character, and then either pressing the navipad >...

  • Page 65: Storing Owner Programs

    FDS-366T Utilities - Security Lock Outs - Owner lock Storing Owner To store a program as an 'Owner' program, the unit must be in Owner Lock setup mode when the program is stored, otherwise the stored program will not Programs be identified as an Owner program in the program list.

  • Page 66: Oem Lock

    To activate the OEM Lock go to the Utilities, select "OEM Lock" and turn the rotary encoder clockwise. Enter the default password, which is "BSS" for OEM Lock, by turning the rotary encoder to change the displayed character, and then either pressing the navipad > key or pushing the rotary encoder to move along the password.

  • Page 67: Storing Oem Programs

    FDS-366T Utilities - Security Lock Outs - OEM Lock ENTER key should be pressed again - prompting for the user password to be entered. At this point it is possible to change the existing default password to one of your choice - particularly recommended if the unit is to be hired out as the default password is the same on all FDS-366Ts.

  • Page 68: Oem & Owner Locks

    FDS-366T Utilities - Security Lock Outs - Notes OEM & Owner If a program has both OEM and Owner Locks applied to it a combination symbol, i.e. diamond and padlock, will denote the common parameters. Any Locks such programs will be displayed with this symbol in the STORE, RECALL and default screens.

  • Page 69: Serial Port

    (for example) to several Omnidrives simultaneously. This mode should also be selected when using the BSS MIDI network with the FPC-900r and Soundbench systems. PC Port Allows the unit to be connected directly to a PC via the RS-232 port. In this mode programs like Soundbench and Smaart Live can communicate with the Omnidrive and edit the program parameters.

  • Page 70: Midi Channel

    FDS-366T Utilities - MIDI MIDI Channel 1-16 Select the MIDI channel that the unit is assigned to (standard MIDI channels 1 through 16 are available). In order to communicate effectively with other Omnidrives connected on the same MIDI network all units that require synchronisation for program changes and control must be on the same MIDI channel.

  • Page 71: Delete Program

    FDS-366T Utilities - Program Functions Backup & "On" or "Off" Swap Defaults to 'Off'. Often known as Edit/Compare in other systems. This function allows the user to make adjustments to a setup, and then compare the changes to the original setup. With this facility turned 'On', the STORE and RECALL buttons are reprogrammed to perform 'backup' and 'swap' respectively.

  • Page 72: Input Channels

    FDS-366T 19.0 Input Channels There are three inputs available for routing to the outputs, plus an internal mono sum of inputs. The input channels are: A, B, C and Sum. Any input can be routed to any output, particularly in the 'Mono' configuration mode however, in the stereo configuration modes inputs A&B are usually the stereo pair and input C can be used as a separate feed for mono sources, e.g.

  • Page 73: Delay

    FDS-366T Input Channels - Screen Explanations Gain -15.0dB to +15.0dB in 0.1dB steps To adjust the relative gain of the input channel, turn the rotary encoder to achieve the desired gain. Delay Adjustable in ms, m, ft and fps The delay on each input channel can be adjusted individually, in approximately 11 microsecond steps.

  • Page 74: Deq

    It is also an important characteristic of the FDS-366T Dynamic Equaliser (and all other BSS Audio compressors) and is why a ‘soft knee’ or other similarly labeled control is not required. Progressive knee is also...

  • Page 75: Atk (Attack)

    FDS-366T Input Channels - DEQ Dynamics Screen one of the main reasons for the transparency and musicality of the DEQ at low compression ratios. Envelope shaping The Dynamic Equaliser has automated time constants which track both the nature of the programme, and the settings of the crossover filters and the Equaliser associated with DEQ.
  • Page 76 FDS-366T Inputs - EQ EQ adjustment The next screen following the DEQ dynamics settings is the EQ adjustment screen associated with the DEQ, this is represented by the DEQ logo in the top screens right of the display. This EQ should be set up to accomplish the dynamic EQ characteristics as required and is permanently wired into the channel, although its effect can be switched out with the EQ Bypass facility.
  • Page 77 FDS-366T Inputs - EQ EQ shape The shape of the EQ can be selected from one of the following by turning the rotary encoder: Hi shelving with 12dB slope (Hi12) Hi shelving with 6dB slope (Hi6) BELL Low shelving with 6dB slope (Lo6) Low shelving with 12dB slope (Lo12).
  • Page 78 FDS-366T Inputs - EQ Frequency "15Hz" to "16kHz" Turning the rotary encoder adjusts the EQ 'centre' frequency if a bell shape EQ is chosen and the -3dB points for the shelving EQs. The filter position is shown graphically by the cursor. Cut/Boost "-15dB"...

  • Page 79: Output Channels

    FDS-366T 20.0 Output Channels There are six output channels available for routing audio to the external system. The output channels are labelled 1-6 on the front of the unit. To select any one of the 6 output bands, either press the rotary encoder until the output is shown on the screen, or press the relevant assign key in the outputs area on the front panel.

  • Page 80: Name

    FDS-366T Output Channels - Name & Source Name 'Name' is the first screen in the Output menu. Here you can identify each output with a name suitable to its function, selecting from a list of preset names in the FDS-366T. Bands 1-6 Bullet Flat...

  • Page 81: Low Shape

    FDS-366T Outputs - Crossover Settings Low Shape This screen is used to select the filter shape/slope type for the lower band edge (high-pass) of the current output band. The band edge will be highlighted on the graphic on the screen. The higher the dB/Octave number the steeper the slope of the filter's rolloff, see the graphs on the preceding page for a more accurate representation of this concept.

  • Page 82: Band Gain

    FDS-366T Outputs - Polarity, Phase & Gain Phase 0-180 (degrees) in 5 steps The phase relationship of the two band edges at the crossover point can be adjusted in 5 degree steps using this function. The phase angle reference frequency is set by the high edge frequency so that this band controls the phase between the current band, and the band above it.

  • Page 83: Limiter

    When the limiters are turned 'Off', the red 'OVER' indicator on the front panel meters will illuminate as a warning. NOTE: BSS Audio cannot accept any liability for any damage caused by disabling the protective limiters in the FDS-366T. This function is used totally at the discretion of the user.

  • Page 84: Delay

    FDS-366T Outputs - Delay Delay link The Delay Link option allows control of several band delays with a single adjustment. This means that once all the drivers in a single cabinet have been aligned, the whole cabinet can be delayed relative to the input signal, or another cabinet, by linking these band delays as one.

  • Page 85: Eq Bypass

    FDS-366T Outputs - EQ/DEQ EQ Bypass "On" or "Bypass" An EQ bypass facility is now available. To switch out the effect of both the EQs and Dynamic EQ select "Bypass" in this screen. DEQ Dynamics The first EQ in each output can be programmed to work dynamically. The first DEQ screen sets up the parameters of the EQs' compressor;...

  • Page 86: Atk (Attack)

    It is also an important characteristic of the FDS-366T Dynamic Equaliser (and all other BSS Audio compressors) and is why a ‘soft knee’ or other similarly labeled control is not required. Progressive knee is also one of the main reasons for the transparency and musicality of the DEQ at low compression ratios.

  • Page 87: Outputs - Eq

    FDS-366T Outputs - EQ EQ adjustment The next screen following the DEQ dynamics settings is the EQ adjustment screen associated with the DEQ, this is represented by the DEQ logo in the top screens right of the display. This EQ should be set up to accomplish the dynamic EQ characteristics as required and is permanently wired into the channel, although its effect can be switched out with the EQ Bypass facility.

  • Page 88: Eq Shape

    FDS-366T Outputs - EQ EQ shape The shape of the EQ can be selected from one of the following by turning the rotary encoder: Hi shelving with 12dB slope (Hi12) Hi shelving with 6dB slope (Hi6) BELL Low shelving with 6dB slope (Lo6) Low shelving with 12dB slope (Lo12).

  • Page 89: Frequency

    FDS-366T Outputs - EQ Frequency "15Hz" to "16kHz" Turning the rotary encoder adjusts the EQ 'centre' frequency if a bell shape EQ is chosen and the -3dB points for the shelving EQs. The filter position is shown graphically by the cursor. Cut/Boost "-15dB"...

  • Page 90: Reference Section

    FDS-366T Reference Section - 90 -...

  • Page 91: 21.0 Serial Communications

    MIDI MIDI can be used to form a network of FDS-366T and other MIDI compatible BSS units and/or control them from a PC. The MIDI Mode setting in the Utilities affects the way that the FDS-366T works with the various communications options.

  • Page 92: Midi With Pc Control

    MIDI Mode or Channel, will immediately end this capability. MIDI with PC If a PC is used to control the network, i.e. using software such as BSS Audio's Soundbench, then the PC becomes the 'master' and also requires a MIDI Control 'loop' in order to communicate.

  • Page 93: Rs232

    Port" and all the other units in the loop to MIDI Mode "Thru". Also, to enable the RS232 port the Serial Port parameter must be set to "RS232". Example MIDI network of BSS units with PC control using RS232 MIDI Mode: PC Port...

  • Page 94: Rs485 & Multidrop

    FDS-366T Serial Communications RS485 RS485 & Multidrop Unlike RS232, that can only work with two devices and with cable lengths of about 50 feet, or MIDI that has a similar cabling length restriction, RS485 can be used to set up 'multidrop' networks of units that are capable of communicating successfully over long distances - up to around 4000feet.

  • Page 95: Midi Channel

    Termination resistor fitted MIDI Mode: Multidrop Some of the older MIDI only BSS products can be connected (within Midi's distance capability) but, only by connecting single units to those on the RS485 multidrop network, as shown below. These units will be capable of accepting program changes but must be switched to a different MIDI channel if a MIDI dump is sent from the master FDS-366T.
  • Page 96 RS485 RS232 to RS485 Converters At the time of writing the FDS-366T Omnidrive is the only BSS unit to have built in RS485 support however, a multidrop system can be used with RS232 equipped devices, such as the FDS-355, Minidrive models or a PC, using RS232 to RS485 converters.
  • Page 97 Use 2 wire multi-point (hence 'multidrop') mode for driving an FDS-366T RS485 system. The switch settings shown below should be used to connect either a PC to a network of FDS-366Ts or other RS232 compatible BSS products, such as the FDS-355 or Minidrives. Switch S1-1 sets the termination resistance and should be set ot "ON"...

  • Page 98: Troubleshooting

    FDS-366T 22.0 Troubleshooting Problem: Unit does not power up. Solution: Check power cable is inserted properly at back of unit. Check the fuse in the plug (if existing) on the power cable and/or try another power cable. Check mains supply is powered and operating at a voltage within the required range.

  • Page 99: Fds-366T Omnidrive Midi Implementation

    FDS-366T 23.0 FDS-366T Omnidrive MIDI Implementation V1.0 1 June 1999 A.1 FDS-366T MIDI Implementation O=Yes X=No FUNCTION TRANSMITTED RECOGNISED REMARKS BASIC CHANNEL Default 1-16 1-16 Memorised Changed 1-16 1-16 MODE NOTE NUMBER VELOCITY AFTER TOUCH PITCH BENDER CONTROL CHANGE PROGRAM CHANGE 0-59 0-59 True Number...

  • Page 100: Default Configuration Settings

    FDS-366T 24.0 Default Configuration Settings MONO OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 NAME Band 1 Band 2 Band 3 Band 4 Band 5 Band 6 SOURCE LO XOVER SHAPE L-R 24 L-R 24 L-R 24 L-R 24 L-R 24 L-R 24...
  • Page 101 FDS-366T Default Configuration Settings (common) PHASE (Degrees) POLARITY Normal Normal Normal Normal Normal Normal GAIN LIMITER ON/OFF OVER 4dBu 4dBu 4dBu 4dBu 4dBu 4dBu DELAY LINK LENGTH EQ (Bypass) ON/BYPASS ON/OFF 0.0dBu 0.0dBu 0.0dBu 0.0dBu 0.0dBu 0.0dBu RATIO FREQ 1.00kHz 1.00kHz 1.00kHz 1.00kHz...

  • Page 102: 25.0 Filter Allocations

    FDS-366T 25.0 Filter Allocations The crossover filters and EQs share DSP resources between two Motorola 56300 DSP chips. There are certain assignment constraints, the table below summarizes how the resources are allocated. DSP Assignment table: Output 1&2 Output 3-6 Output 1&2 Outputs 3-6 DSP Number Total Filters...

  • Page 103: Specifications And Block Diagram

    FDS-366T 26.0 Specifications and Block Diagram Performance (filters out) Frequency response 10Hz - 20kHz, +/-0.25dB 10Hz - 40kHz, +/-2dB Dynamic range >112dB, unweighted 22Hz to 22kHz Channel Separation >80dB, 30Hz to 20kHz Distortion (THD) <0.005%, 20Hz - 20kHz @+10dBu output Metering Input headroom metering -20dB, -12dB, -6dB, -3dB, Clip Relative to clip point (+20dBu)

  • Page 104: Dynamic Eq

    FDS-366T Specifications Output Section Output Impedance <50 Ohms, electronically balanced & floating Maximum Output Level +20dBu into 600 Ohms or greater Output Gain +/-21dB, variable in 0.1dB steps Output Connector XLR-3M or equivalent Transformer Balancing optional Crossover Filters Slopes 6, 12, 18, 24, 36, 48 or 52dB per octave (Filter type dependant) Type Bessel, Butterworth, Linkwitz-Riley or Neville Thiele Method Delays...

  • Page 105: 27.0 Block Diagram

    FDS-366T 27.0 Block Diagram - 105 -...
  • Page 106 FDS-366T 28.0 User Notes - 106 -...

  • Page 107: User Notes

    FDS-366T User Notes - 107 -...
  • Page 108 FDS-366T User Notes - 108 -...
  • Page 109 FDS-366T AES/EBU Alignment Assistant14 Applications 11 5-Way Zoning Distribution Backup band gain Block Diagram Brightness CD Horns adding EQ 42 Clipboard Contents Contrast Crossover Shapes 19 Cut/Boost EQ 83 Delay correction 51, 58, 66 input output Delay Link output DEQ 16 DSP 11 Dynamic Equalisation 71, 72, 79, 81...
  • Page 110 FDS-366T storing Inputs 27 delay 69, 70 mode Limiter threshold 77 Limiters Lock owner Main Display memories Meter output MIDI connectors setting channel number 66, 67 setting mode MIDI implementation chart Mode LED Mono mode 51 Mute LED Output band gain 76 delay delay link 78 High Xover shape...
  • Page 111 FDS-366T Phase matching Polarity Power AC Fusing 30 connection 29, 30 inlet Quick reference adding EQ for CD Horns Rear panel Recall key 25 Recalling from a PC Card 37, 44 RS-232 connections Safe mode Sample rate 13 Security Source Specification 96, 97 Stereo 2-Way mode...
  • Page 112 FDS-366T EQ 83 Wiring convention 27 Xover adjust Output - High shape Output - Low freq Output - Low shape - 112 -...

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