BW Broadcast DSPXmini-FM Operational Manual
  1. Manuals
  2. Brands
  3. BW Broadcast Manuals
  4. Other
  5. DSPXmini-FM
  6. Operational manual

BW Broadcast DSPXmini-FM Operational Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

DSPXmini-FM
Broadcast Audio Processor
Operational Manual
Version 1.2
www.audio-processor.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DSPXmini-FM and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Summary of Contents for BW Broadcast DSPXmini-FM

  • Page 1 DSPXmini-FM Broadcast Audio Processor Operational Manual Version 1.2 www.audio-processor.com...

  • Page 2: Table Of Contents

    DSPXmini-FM placement The DSPXmini-FM and its processing structure Processing block diagram The DSPXmini-FM menu system The Menu structure Setting up the processing on the DSPXmini-FM Getting the sound that you want Managing Presets Factory presets Remote control of the DSPXmini-FM...

  • Page 3: Warranty

    This warranty does not exclude or limit the buyer’s statutory rights provided by national law, in particular, any such rights against the seller that arise from a legally effective purchase contract. The warranty regulations men- tioned herein are applicable unless they constitute an infringement of national warranty law. DSPXmini-FM operational manual V1.2...

  • Page 4: Safety

    Cleaning: The appliance should be cleaned only as recommended by the manufacturer. Non-use Periods: The power cord of the appliance should be unplugged from the outlet when left unused for a long period of DSPXmini-FM operational manual V1.2...
  • Page 5 Radio Interference Regulations of the Canadian Department of Communications. Le present appareil numerique n'emet pas de bruits radioelectriques depassant les limits applicables aux brouillage radioelectrique edicte par le ministere des Communications de Canada. DSPXmini-FM operational manual V1.2...

  • Page 6: Forward

    The DSPX became very popular but we were getting a lot of inquires for a more cost-effective solution for FM. And so, the DSPXmini-FM was born, as a scaled down version of DSPX with some reduced features like no LED metering, no analog outputs and less sophisticated distortion control. By incorporating proven -band AGC, -band limiter and high-performance digital stereo generator, DSPXmini-FM offers loudness, consistency and adjustability never before seen in a small processor like this.

  • Page 7: Introduction To The Dspx Mini

    The BW DSPXmini-FM is a new generation of digital audio signal processor that can be used to process audio ready for FM. Using the latest multi-band DSP technology the DSPXmini-FM offers a versatile and powerful tool in creating a loud punchy on-air presence.

  • Page 8: Dspxmini-Fm Connections

    FUSE DSPXmini-FM operational manual V1.2...

  • Page 9: Dspxmini-Fm Jumper Settings

    +12dBu operation. You can check the levels going in DSPXmini-FM at any time by bringing up the metering screen (press the middle soft key on the front panel). If you are unsure, leave these jumpers at factory default.

  • Page 10: Dspxmini-Fm Metering

    The output meters show a smaller dynamic range compared to the input ones. This reflects the smaller dynamic range of the audio once processed by the DSPXmini-FM. If we were to have used the same scale as the input metering we would not see a lot of activity on the bars.

  • Page 11: Quickstart

    6. Navigate to the ‘STEREO’ menu and adjust the ‘MPX OUTPUT LEVEL’ to match the transmitter (or link device) that follows the DSPXmini-FM. Adjust for 100% modulation with audio. 7. Press the 'LOAD' soft key and select a preset from the list! 8.

  • Page 12: An Introduction To Audio Processing

    Excessive clipping will pro- duce a form of distortion that produces a tearing or ripping sound. Clipping can also be used as an effective method of high frequency peak control when used in conjunction with distortion controlling filtering. DSPXmini-FM operational manual V1.2...

  • Page 13: Source Material Quality

    The DSPXmini-FM has the ability to substantially improve the quality of your ON-AIR broadcast. However the DSPXmini-FM can only work with what you provide it. The best performance will be obtained when the DSPXmini-FM is fed with very clean source material. After dynamic multi-band re-equalisation is performed, poor quality source material will sound poorer when processed with the DSPXmini-FM.

  • Page 14: The Dspxmini-Fm And Its Processing Structure

    Bass enhancement The DSPXmini-FM offers a bass enhancement via peaking filter that can be set to provide up to 6dB of gain on one of four frequencies with a choice of  Q's. This can be thought of as a simple bass parametric.

  • Page 15: Processing Block Diagram

    DSPXmini-FM operational manual V1.2...

  • Page 16: The Dspxmini-Fm Menu System

    CONCEPT such as remote control and security. HARDWARE CONTROL SYSTEM PROCESSING SOFTKEYS: The DSPXmini-FM has three context sensitive REMOTE APPLICATION soft keys that help access commonly used features. These BOOTLOAD intuitive softkeys are primarily designed to aid in the selec- tion, loading and saving of presets, as well as displaying the metering screen.
  • Page 17 FM broadcast. The available options are 0uS, 7uS and OFF The 'PROCESS' menu allows access to all of the processing blocks that make up the DSPXmini-FM. There are only sub-menus inside the 'PROCESS' menu. The submenus are laid out in the same configu- ration as the signal path through the DSPXmini-FM.
  • Page 18 The 'SCHEDULE' menu contains all the controls for the dayparting (REAL TIME CLOCK) preset switch- ing. 'TIME' Sets the time and day of the DSPXmini-FM’s Real Time Clock. 'DAYPARTING ON/OFF: Enables or disables the scheduling. 'DP(X) ON/OFF' Enables or disables an individual daypart schedule.
  • Page 19 'PORT' Sets the port number of the LAN port 'ABOUT' DSPXmini-FM version number and design credits. 'BOOTLOAD' This option is used to FLASH update the software and firmware inside the DSPXmini-FM. Further information on using this option is described in the documentation supplied with the upgrade.

  • Page 20: Setting Up The Processing On The Dspxmini-Fm

    This effect can be compensated somewhat by enhancing the bass prior to multi-band processing. The DSPXmini-FM has a pseudo parametric style bass equalizer control that allows you to sweet tune the bass. Four frequencies, amplitudes and Q's are provided giving you 6 different bass curves to select from.
  • Page 21 The multi-band limiters in the DSPXmini-FM are of the dual time constant variety. There is an attack and decay to handle the peaks and an attack and decay to handle the average level of limiting. Understanding how the two time constants interact is imperative if you want to make major changes to how each bands limiter reacts.
  • Page 22 The mixer The post limiters mixer in the DSPXmini-FM is not strictly a mixer but a band output level control where small EQ changes can be made. Be careful when making large EQ changes at this stage because there is no peak control prior to the clipping system.
  • Page 23 Auditioning individual stages of the DSPXmini-FM processing When setting up the DSPXmini-FM it is sometimes useful to hear the effects of the adjustments on that particu- lar processing stage. By setting the other processing blocks up in a certain way you can make it easier to hear the effects of the one you are adjusting.

  • Page 24: Getting The Sound That You Want

    While the DSPXmini-FM can help you obtain the sound that you want we must always take into account the limi- tations presented to us by the transmission channel. The biggest problem we have is the maximum peak level that can be handled by that transmission channel.
  • Page 25 Speed up the release time of the average release time constant of those bands Slow down the band  average attack time so that the peak time constant dominates the control signal pro- viding faster control. DSPXmini-FM operational manual V1.2...
  • Page 26 MODIFYING LOTS OF THE PARAMETERS. IF YOU ARE ADJUSTING ONLY A COUPLE FROM THE ABOVE SUGGESTIONS THEN YOU PROBABLY HAVE A BIT MORE LEE-WAY. IT IS VERY EASY TO BECOME UNSTUCK AND LOSE YOUR WAY ONCE YOU START 'TWEAKING' LOTS OF DIFFERENT SETTINGS. DSPXmini-FM operational manual V1.2...

  • Page 27: Managing Presets

    PaneL controL The DSPXmini-FM has an assortment of factory presets and provision for 8 user ones. While the factory presets may not suit your tastes you will generally find one that serves as a good starting point in creating your own cus- tom preset.

  • Page 28: Factory Presets

    The factory presets in the DSPXmini-FM are not supposed to be de facto standards by any means but are start- ing points for you to create your own user presets. It is impossible to create presets that will suit every format and market.

  • Page 29: Remote Control Of The Dspxmini-Fm

    DSPXmini-FM remote application The DSPXmini-FM can only to talk to the serial system (RS22) or the ethernet/LAN system at any point in time so you will need to select which one of the two remote control methods you wish to use by selecting the appro- priate option from the remote source parameter which is contained in the system menu accessible from the DSPXmini-FM’s front panel.
  • Page 30 If you wish to use the NET/LAN port to control the DSPXmini-FM follow the steps below 1. Connect a cat  cable to the RJ port on the DSPXmini-FM and plug this into your network hub/switch. A Xover cable can be used to connect directly to a PC if you don’t have a switch or hub.
  • Page 31 Understanding the preset list The preset list contains all of the presets contained in the DSPXmini-FM. The user presets are prefixed U1 to U8 and the factory presets from F1 onwards. You may need to use the scroll arrows to view all of them as they won't all fit in the window at one time.
  • Page 32 'on air'. The exception to this is when the default preset is being overridden by a daypart or remote trigger. In this case the DSPXmini-FM will 'on air' the selected preset when the daypart or trigger hands back control to the default preset.
  • Page 33 This option will pop up the standard windows load dialog box. You can browse to and select a preset file to be loaded into the DSPXmini-FM. The preset location that is loaded is the currently highlighted (in blue) preset, not...
  • Page 34 The A/B feature makes it easy to build up your own presets by being able to easily compare before and after processing adjustments. We hope you find it useful. DSPXmini-FM operational manual V1.2...

  • Page 35: Remote Trigger Port

    The system menu contains the remote trigger port option from where it can be enabled or disabled. If enabled the remote trigger port on the DSPXmini-FM allows you to select any of the 8 user presets by pulling one of 8 pins on the trigger port socket low. The rear panel trigger port socket is a 9 pin male D-type whose con- nections are shown below.

  • Page 36: Security Code Lock

    If unsuccessful you will be required to try again. If successful the U1=BASS FACE INPUT DSPXmini-FM will allow you to re-confirm the code or change it. This is where you may want to change the fac- U2=ROUND FACE PROCESS tory default code if you have not already done so.

  • Page 37: Clock Based Control

    The DSPXmini-FM contains a battery backed up real time clock that can maintain the current time and date even when the DSPXmini-FM has its power removed. This allows users to switch between presets at specific times of the day or week. This is very useful on a multi-format radio station where one processing preset may not suit all of the formats of music that are broadcast.

  • Page 38: Specifications

    Connectors: BNC, floating over chassis ground Filtering: RFI filtered. Subcarrier (SCA) Inputs Configuration: Subcarrier input sums into composite baseband output. Impedance: >10K SCA input level Sensitivity: Sums into MPX output at 10% injection. Connector: BNC, unbalanced and floating over chassis ground. DSPXmini-FM operational manual V1.2...
  • Page 39 Connector: IEC. Detachable -wire power cord supplied. Grounding: Circuit ground is independent of chassis ground, and can be isolated or connected with a rear panel switch. Dimensions (W x H x D): mm x 82mm x 200mm DSPXmini-FM operational manual V1.2...

Table of Contents