background image

 

 

digital audio 
modular 
processing system

 

C8000

 

4/8/16 channels DSP with SDI & system-bus I/O 

C8492(B)

 

   

page

  4/30

 

 

Initial set up 

 

ADDRESS: 

This rotary encoder sets the CAN ID of the C8492. The 16 switch positions 
are hexadecimal numbers (0x0 to 0xF). The CAN address also defines the 
location of the module icon within the GUI overview of rows three to six. 

 
SW1

 

#1 BUS-EN 

ON 

=  The output configuration will be taken from the NV (non volatile) 

 

 

memory after power up. 

 

OFF   =  will set all bus outputs to Tri-State-Mode (inactive).  

 

 

 

Now you may use the frame controller to configure the board. 

 

 

 

This configuration will automatically be stored into the NV memory 

 

 

 

To enable the configuration for the next power up you must  

 

 

pull out the module and set BUS-EN=ON again. 

 
Important note! Since this type of module has an electronic output routing facility, great care must be 
taken when installing or exchanging a module when such frame has components which are On Air! 
If an unknown output bus configuration is stored, it can cause a conflict with other modules in the frame. 
If you are not sure about the output bus configuration you must turn BUS-EN=OFF before inserting such a 
module into a system that is On Air. If all settings are done remotely and the unit fits into the bus 
assignment scheme of that frame, you must remove it and place the switch back into 
position BUS-EN=ON to activate this setting for the next power up(s). 
 

#2 H-CAN 

OFF  =  CAN bus speed 256kBit/s 

 

ON    =  CAN bus speed 1Mbit/s 

 
Important Note! For a limited number of modules like the C8492 it is possible to communicate with a  
CAN bus speed of 1MBit/s. This provides more bandwidth to move measuring data from the module via 
the frame controller to the J*AM based loudness logger. Be sure that all modules within a frame are 
operating with the same CAN bus speed. 
 

#3 

OFF  =  Internal use and must be set to OFF. 

 

#4  ID +16 

OFF  =  CAN bus address range is standard (counting from 0x0 to 0xF)  
 

 

see rotary encoder settings above. 

 

 

 

ON 

=  CAN bus address range is extended by +16  

 

 

(counting from 0x10 to 0x1F). 

 

#5 MASTER 

OFF  =  Sync is taken from the c8k frame. 

 

 

 

ON 

=  The C8492(B) is sync master for the frame.  

 

 

 

Sync is derived from the SDI input. 

 

Both settings are only valid if the Bus Access feature is enabled! 

 

#6 

OFF  =   Internal use and must be set to OFF

 
INIT 

Pressing the INIT button during power up will initialize the module 
parameters to factory default values. 

 
General Remark! The C8492 is a 16 channel device from the SDI de-embedding / embedding point of 
view but the number of audio processing channels may be different. Four channels are standard while  
eight or 16 channels are an option. Since the parameters are similar, this document describes the  
16 channel processor version. The difference will be the number of fail-over circuits (one for the 4ch, two 
for the 8ch and four for the 16ch option). 

Summary of Contents for C8492

Page 1: ...nd processing 5 1 Level Magic Automatic Upmix from stereo or mono Surround fail over via Upmix Downmix C8492B with C8000 system bus access 32 channels bus access 2 or 8 ch mux Metadata routing Metadat...

Page 2: ...and de embedding complies with SMPTE 299M 3G HD or SMPTE 272M AC SD Metadata embedding and de embedding complies with SMPTE 2020 2 Video Data Rate 2970 296Mbps 3G 1485 1483 5Mbps HD 270Mbps SD Video F...

Page 3: ...Dimension 3RU 4HP 160mm depth DIN41612 backplane connector Environmental Operating temperature 0 40 C Non operating 20 70 C Humidity 90 non condensing General Features Power fail relay bypass may be...

Page 4: ...and place the switch back into position BUS EN ON to activate this setting for the next power up s 2 H CAN OFF CAN bus speed 256kBit s ON CAN bus speed 1Mbit s Important Note For a limited number of...

Page 5: ...other c8k modules to form highly complex signal chains The variations of the C8492 platform range from C8492 4 four channel SDI I O processor to C8492 16S 16ch SDI I O processor with surround option...

Page 6: ...LED green if Rx locked yellow if Rx locked async audio if Rx unlocked Always ON Last Valid red if Rx unlocked TG OFF or TG AUTO if TG Always ON None SYNC MASTER appears if the SW1 5 is set to ON BYPA...

Page 7: ...access MODE 8492 if STATUS red at least one program active no SDI relay bypass all programs bypass or SDI relay bypass never never MODE 8492 B if STATUS red at least one program active no SDI relay b...

Page 8: ...and 11 12 Channels 13 14 15 16 belong to mono programs whereas channel 15 16 are not part of the preset currently loaded Here another example where channels 15 and 16 are not part of the actual loade...

Page 9: ...ge the parameters for one 2ch fail over without changing the parameters for another one Save as Select a preset NV memory number Name Assign the preset a name up to 16 digits and press SAVE Processing...

Page 10: ...he module undergoes revisions where parameters may be added while others become obsolete The parameter version indicates it Important Note It is mandatory to initialize the module to factory defaults...

Page 11: ...of all presets into an XML file You may store such file on a PC Restore Settings and You may browse a matching XML file from a PC Presets from File Pressing RESTORE will overwrite all active paramete...

Page 12: ...ternately you may select a signal pair to the SDI embedder see EMBED pane for reference Enable Input Bus ON OFF Error Detection The serial audio data from the frame bus can be monitored for proper pos...

Page 13: ...ietary technology from Junger I e you can not interconnect legacy Dolby modules with the C8492 B for metadata transport We recommend using the successor platform C862x C8621 Dolby Decoder C8631 Dolby...

Page 14: ...program configuration of the DSPs Below an example where DSP 1 is configured for 5 1 2 whereas DSP 2 is configured for 4 x 2 program processing SDI Bypass Off On You may bypass the audio de embedder...

Page 15: ...f the module is frequently taken out of service Alternative Input Due to the fact that the DSP is fed in 2Ch mode and in case of Channel Allocation surround operation it is possible to select between...

Page 16: ...yzz pdf which you may download from our web site Operating Mode 5 1 2 4 x 2 defines the number of audio channels which are used for one audio program All relevant processing blocks will be configured...

Page 17: ...nsient Processor as well Processing Profile live speech pop classic Loudness Target dBFS Level mode 0 50 LKFS ITU mode 0 50 LUFS EBU mode 0 50 Time s min h 10 20 40 sec 1 2 5 10 20 40 min 1 2 h Max Ga...

Page 18: ...ode to let non audio signals pass through without the DSP processing to maintain data structure for non audio signals Expert show don t show The expert mode offers the possibility for manual intervent...

Page 19: ...ilover A Mode Primary Secondary AUTO Selection between both inputs and the auto mode Dual Mono OFF AUTO If the fail over input is fed by a dual mono signal the circuit may automatically copy the oppos...

Page 20: ...is selected The example above shows a condition where the LFE is not linked to the other surround channels and may be controlled independently The remaining two channels may be used for an independent...

Page 21: ...ix algorithm the upmix block has a surround detector that will decide if an input surround signal has disappeared under certain conditions Fail Over C Upmix This can be used to provide a two stage fai...

Page 22: ...y FIX connected to the surround input or the upmix output but it may also perform an AUTO switch over in case the surround input fails Detection Center Surround Center or Surround Signal loss Here you...

Page 23: ...reate spectacular effects Processing Time ms 3 100 The processing time has great influence on the quality of the upmix process but of course alters the latency of the audio signal It is highly recomme...

Page 24: ...sing the Effect Gate function the system interactively processes the subwoofer signal and generates a signal that comes very close to a real LFE signal without creating permanent rumble and bass excit...

Page 25: ...ignals from the 16 de embedded channels to up to 16 processing channels Important Note The number of processing channels may be different It depends on the license that is activated for the module A s...

Page 26: ...x is involved or for other purposes you can apply up to 8 frames of video dely The amount of time depends on the video standard Generate New SDI ON OFF Audio Structure If you need to replace the struc...

Page 27: ...y 0 340 ms Before the signals are embedded you may engage a delay per mono channel Silence Mutes the respective audio channel at the embedder side Transparent ON OFF Status Bits You can decide whether...

Page 28: ...ode ALWAYS ON you may select one of the standards to be used For the AUTO Input loss mode you may additionally decide between Last Valid or None Last Valid The generator uses the last seen input forma...

Page 29: ...external GPO device GPIs are useful if you want to recall settings remotely e g via presets The C8k frame can handle 127 different virtual system GPI numbers You must assign a unique number to the re...

Page 30: ...preset is loaded and if you Preset modified change parameters which are related to that preset the word modified will be displayed in line with the preset name in the status window In this case you ma...

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