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iLM8

8 Channel Intelligent Loudness Meter

User Manual

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Summary of Contents for iLM8

Page 1: ...iLM8 8 Channel Intelligent Loudness Meter User Manual ...

Page 2: ...aySequerra has been building broadcast quality products since 1989 The technology developed for the iLM8 and all of our products has evolved through a process of user feedback extensive listening field testing and careful refinement In the event that you encounter any technical or operational difficulties with this or any DaySequerra product please feel free to contact us at 856 719 9900 Our offic...

Page 3: ...s Easy to read numerical Measured and Target readouts on vacuum fluorescent display bar graph LED audio level meters and exclusive Mix Monitor indicators Front panel headphone monitor Ethernet interface for long term logging and field software updates Optional HD SDI and Balanced Digital AES I O Important Safety Information 4 Service Information 4 Technical Specifications 5 Introduction 6 Measurin...

Page 4: ...rmation The DaySequerra iLM8 contains no user serviceable components inside the unit Please contact DaySequerra for repair and upgrade information In the event that your unit needs to be returned to the factory contact us for a return authorization number Please visit www daysequerra com and register your new iLM8 so we can keep you informed of the latest hardware and software updates The lightnin...

Page 5: ...s Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at their own expense The user is cautioned that changes and modifications made to the equipment without approval of the manufacturer could void the user s authority to operate this equipment The user should use only shielded and or grounded cables ...

Page 6: ...erlaps in any audio content resulting in a more accurate perceived loudness measurement over time This proprietary algorithm was developed by after extensive research into human hearing and perceived loudness The iLM8 measures the perceived loudness of eight channels of program audio and displays the results in an easy to read numerical format with a moving average over time eliminating the variat...

Page 7: ...kHz sine wave The most current weighting standard ITU R BS 1770 produces results known as LKFS that are referenced to a dB FS scale While certain Leq x measures match more closely to human loudness perception than traditional SPL or RMS measurements there are still many broadcast content types that cannot be measured correctly with a Leq x or LKFS weighting method For example a narrowband signal m...

Page 8: ...h a single tone of a certain energy level and more tones are added with equal energy in the critical bands the total signal energy is kept constant regardless of the number of tones If changing from one to two tones the energy of each of the two tones is exactly half of that of the single tone While the amount of audio energy never changes the perceived loudness increases as the energy spectrum sp...

Page 9: ...he HEIMDAL multi band model did not achieve the complexity of cochlear modeling as shown by J Allen the method had the lowest error compared to any preceding loudness models Nielsen Skovenborg 2004 Absolute Error dB of various loudness measures Despite the clear benefits of critical band analysis in loudness measurement there are very few methods currently available to measure loudness this way in...

Page 10: ... Intelligent Loudness Meter Operators should position iLM8 at various places within the signal flow to objectively verify that audio loudness levels are within tolerance Limited operator training is required to learn the basics of perceptual loudness measurement and management A Listening Ear No amount of metering can replace the value of active listening Broadcasters should use trained technician...

Page 11: ...r during the second half While this extreme dynamic range may be acceptable in a movie theatre it is typically not within the typical viewer s home environment The infinite average and fixed offset approach has no way of addressing such intra content issues Another challenge that fixed offset correction cannot solve is how loudness is perceived in the context of playback In this scenario a TV prog...

Page 12: ...The iLM8 chassis has four rack mounting holes and has been designed to fit in a standard 1RU space Plastic finishing washers are recommended to protect the painted surface around the mounting holes Locate the air vents on each side of the unit and be sure to keep them clear so the unit may have adequate ventilation Power Connection The AC power cable supplied with iLM8 must be connected from the I...

Page 13: ...a PC running DaySequerra iLM8 Remote Dashboard software Display and Controls VACUUM FLUORESCENT DISPLAY A multi function display will indicate current operating status of the unit and system menus ROTARY ENCODER A stepping optical rotary encoder is used to select values or navigate the menu system ENTER KEY Used to enter a menu or confirm a selection To enter the main system menu simply press ENTE...

Page 14: ...B 25 female connector is included on iLM8 and can interface directly with your existing equipment HD SDI I O option 02 Two 75Ω BNC connectors handle HD SDI I O One input port as well as one passive output are present when this option is installed Supported formats include SMPTE 259M SMPTE 292M and SMPTE 424M as well as ITU R BT 656 and ITU R BT 601 See the HD SDI section of this manual for more de...

Page 15: ...tage detected on this port will cause iLM8 to toggle pause of the infinite average for the surround input Input 4 Momentary voltage detected on this port will cause iLM8 to toggle pause of the infinite average for the auxiliary input NETWORK Used for logging or to update iLM8 s firmware To connect directly to a PC without use of a network switch or hub a crossover cable is required Firmware updati...

Page 16: ... converted to 48 kHz 24 bit resolution regardless of the source material and is available as AES audio at iLM8 s output jacks Meter Display Metering display iLM8 INPUT LEVELS LED display shows current true peak amplitude of input signal from 60dB to 0dB across all active channels Unused channels will not light the display The Meters are updated every 20ms L Left AES Input 1 2 Ls Left Surround AES ...

Page 17: ...2 Indicates which input measurements are being displayed surround our AUX on the entire screen Pressing ENTER will change between the 5 1 Surround and AUX Stereo input display The loudness measure and short averaging time are displayed here 3 Shows the user set target reference value for the selected input display Pressing ENTER will allow for target level adjustment 4 The calculated Infinite Aver...

Page 18: ...ramming menu turn the selection knob in any direction while at the HOME screen The ENTER key will enter the selected sub menu or enter the value selection mode for the selected option A press of the BACK key will navigate to the previous menu level or will revert the current value to its last stored state Menu Tree Visual Map of iLM8 Menu System ...

Page 19: ...nter the main menu press the ENTER key from the home screen while the unit is unlocked From the main menu screen you may navigate to the desired sub menu by pressing ENTER System Menu System Menu Screen Display Navigating to SYSTEM MENU from the main menu will allow adjustment of I O audio handling network settings diagnostics alarm settings or information on the unit ...

Page 20: ...e AUX iLM8 will get timing from the AUX BNC Input Sample Rate If Clock Source is set to internal defines what sample rate frequency iLM8 will use 32 0 44 1 48 0 88 2 or 96 0 kHz Audio Input Menu Audio Input Menu Screen Display NOTE Unless your iLM8 has the factory installed HD SDI I O or Balanced Digital AES I O modules installed your screen will differ from that above Audio Source Determines whic...

Page 21: ...the correct channel mappings Select the input channel pair to be modified and press ENTER Scroll the rotary encoder to the desired HD SDI channel pair and press ENTER to confirm Repeat for the other channel pairs as needed Network Menu Network Menu Screen Display All of the iLM8 network settings are password protected The password to change the network settings is ilm8 123 Please take note when en...

Page 22: ...rror states that iLM8 may be in DSP Utilization Shows the current load on iLM8 s DSP LED Test Turns on all front panel LED indicators to verify their functionality Meter Brightness Allows adjustment of iLM8 s LED bar graph meters Default 0 Display Brightness Allows adjustment of iLM8 s display output Default Max Restore Settings Returns all settings to their factory default values and reboots the ...

Page 23: ...ult Off About Menu Model Number Displays the model number of the unit Serial Number Displays the serial number of this unit Hardware Rev Displays the hardware revision level of this unit Firmware Rev Displays the firmware revision level that is running on this unit DTS Algorithm Displays the specific DTS algorithm running DTS Algorithm Rev Version of the DTS algorithm running on this unit ...

Page 24: ...ame settings and options Loudness Measure Defines what loudness measure iLM8 will use in determining the audio loudness iLM8 supports industry standard LKFS weighted intensity measures Leq A Leq B Leq C and Leq M and the Neural Loudness Measure Neural Default LKFS Target Level Sets the desired loudness level threshold Target can also be set directly from the home screen 1 to 31dB Default 24 Short ...

Page 25: ...Average Rs Short Average AUX Short Average AUX Inf Average AUX True Standard Peak Aux L Short Average Aux R Short Average Enable Keylock Selecting Enable Keylock will enable they keylock immediately and exit to the home screen inhibiting all key or rotary encoder inputs To disable the keylock press ENTER followed by the BACK key Keylock Settings Keylock Settings sub menu will allow for configurati...

Page 26: ...ent and all cable connections Ensure that iLM8 is operating in the proper input mode for your application and is looking for the source audio on the correct port CRC Error iLM8 has encountered a CRC error in the audio stream Validity Error iLM8 has encountered a validity error with the audio stream Bi phase Error iLM8 has encountered a bi phase error with the audio stream No Parity Error iLM8 has ...

Page 27: ...ur unit unless directed otherwise from DaySequerra 1 Un Zip the files using a compatible utility that can handle ZIP archive file format into a new empty directory on your PC 2 Disable any additional network interface adapters present on your PC Go to Control Panel then Network Connections Right click on the adapter to be disabled and select Disable 3 Unplug your PC from the network it is currentl...

Page 28: ...n the program first starts an icon will appear in the system tray A pop up error message will be presented after the program is initially loaded but not yet configured and the icon will change color to red Dismiss this error and double click on the tray icon to open the main viewer window Un configured Main Viewer Window At the top of the window there are three navigation tabs Surround Auxiliary a...

Page 29: ...s the application will poll iLM8 for its readings Data Logging Specifies the location for storing log files This path may be local or on a network share that the active Windows user has permission to write to Communication Log Enables a diagnostics log to help troubleshoot any communication issues This data will be helpful to DaySequerra support staff in diagnosing any communication problems Data ...

Page 30: ...ort Avg Short combined average for the AUX inputs AUX Inf Avg Combined infinite average of the AUX inputs AUX Peak Combined peak value of the AUX inputs Aux L Short Avg Short average of the AUX Left input Aux R Short Avg Short average of the AUX Right input Device Faults Any faults reported by the unit Refer to the error code table Data logging Field Legend 0 No Faults 1 x AES Lock Error 2 x CRC E...

Page 31: ...k bar where as clicking the close button will minimize the application to the system tray To close the application right click on the tray icon and select EXIT 2 Navigation Tabs Clicking on the tab will change the current view of the program between Surround inputs Auxiliary inputs or the Remote Dashboard configuration page Clicking on the DaySequerra DTS logo will display version and copyright in...

Page 32: ...l s reading is also shown in numerical form to the right of the graph with the graph lines and the numerical value changing color to show the level of loudness 6 Status Bar Three status boxes show more data that is collected from the unit The left box will display unit fault status Clicking on the box will display the history of faults captured by the Remote Dashboard software The center box shows...

Page 33: ...show the update frequency in seconds This value may be modified to the required setting 8 If the key is not present select EDIT NEW then DWORD Value Rename as SpecialPollInterval Change the BASE radio button to Decimal The value data will show the update frequency in seconds This value may be modified to the required setting 9 Close registry editor 10 Restart the time service by selecting START th...

Page 34: ...r accordingly DaySequerra reserves the right to replace any product that has been discontinued from its product line with a new product of comparable value and function This warranty shall be void in the event a covered product has been damaged or failure is caused by or attributable to acts of God abuse accident misuse improper or abnormal usage failure to follow instructions improper installatio...

Page 35: ...20 DownMix User Manual Manufactured under license from DTS Licensing Limited DTS is a registered trademark the DTS Logos and Symbol are trademarks of DTS Inc 2008 2009 DTS Inc All Rights Reserved ...

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