Junger Audio C8491 User Manual
digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
features
• LevelMagic2™ SDI-DSP (international standards selectable) loudness control
• 4 optional 8 or 16 audio channels
• optional surround processing
• fail over and surround upmix
• 16 channel 3G/HD/SD-SDI de-embedder
• 16 in 16 de-embedder matrix
• 16 channel 3G/HD/SD-SDI embedder with video delay
• 32 in 16 embedder matrix
• video test generator
• variable audio delay of 340ms per embedder channel
• true peak brick wall limiters -20 …. 0dBTP threshold
• remote control via web server of C8702 Frame Controller, GPI/O, EmBER plus protocol
block diagram
C8491
C8491_manual_EN_150318.doc
digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
technical specifications
VIDEO:
Standard: SMPTE 425M 2.97 Gbit 3G-SDI Level A, B
SMPTE 292M 1.485 Gbit HD-SDI
SMPTE 259M 270 Mbit SD-SDI
Connection: BNC, 75 Ohm, coaxial (SDI through: active loop, re-clocked)
Signal Level: 800mV ±10% at 75Ώ
Equalisation: 130m (Belden 1694A, 2.97 GHz)
300m (Belden 8281, 270 MHz)
Return Loss: >15 dB (2.97 GHz)
Supported video standards:
3G 1080p 50 SMPTE 425M 3G 1080p60 SMPTE 425M
HD 720p 60 SMPTE 296M HD 1080p 30 SMPTE 274M
HD 720p 50 SMPTE 296M HD 1080p 25 SMPTE 274M
HD 720p 30 SMPTE 296M HD 1080p 24 SMPTE 295M
HD 720p 25 SMPTE 296M HD 1035i 60 SMPTE 260M
HD 720p 24 SMPTE 296M
HD 1080i 60 SMPTE 274M SD 525i/59.94 SMPTE 125M
HD 1080i 50 SMPTE 274M SD 625i/50 SMPTE 125M
HD 1080i 30 SMPTE 274M
all HD-standards are also supported with their 1/1001-frame-rates
Video Delay: 0 … 8 frames for interlaced formats (e.g. 625i50, 1080i59,94)
0 … 15 frames for progressive formats (e.g. 720p50, 720p60)
AUDIO:
Standards: SMPTE 272M (SD) / SMPTE 299M (HD)
Audio Data Format: 24 Bit, transparent for C-Bit and U-Bit according to AES3
Audio Sample Rate: 48 kHz synchronous to video-carrier (SD, HD, 3G)
32 kHz ... 48 kHz asynchronous to video-carrier (HD, 3G)
Latency: (de-embedder + embedder)
3G: < 600 µsec
HD: < 600 µsec
SD: < 2.0 msec
Audio Delay: 16 times 0 ...320 msec
GENERAL:
backplane connector: ref. to DIN41612, 64pin, a+b, male
power supply: +5V DC
power consumption: approx. 1.000 mA
dimension: 3RU, 4HP, 160mm depth
temperature: 10°C … 40 °C
humidity: 90%, non condensing
C8491
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digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
location of switches:
C8491
initial set up
ADDRESS: This rotary encoder sets the CAN ID of the C8491. The 16 switch positions
are hexadecimal numbers (0x0 to 0xF). The logical CAN address also
SW2:
#1 OFF internal use and must be set to OFF.
#2 OFF internal use and must be set to OFF.
#3 OFF internal use and must be set to OFF.
#4 ID +16 ON
CAN address range is extended by +16 (counting from 0x10 to 0x1F)
OFF
CAN address range is standard (counting from 0x0 to 0xF) see rotary
INIT Pressing the INIT button during power up will initialize the module
defines the place of the module icon within the GUI overview.
encoder settings below.
parameters to factory default values.
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digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
C8491
General remark! The C8491 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 8 or 16 channels are an option. Since all parameters are the same for
each version, this document describes the 16 channel processor version. The difference will be the
number of fail over circuits (1 for the 4Ch, 2 for the 8Ch and 4 for the 16Ch option).
Another option is 5.1 surround processing. If this option is enabled one may also perform permanent
surround upmix or use the upmix for surround fail over.
web browser based GUI
Set up of all configurations, parameters and functions via a web browser.
See also C8702 Frame Controller manual and respective firmware release notes.
OVERVIEW
The modules overview of a frame (below the display of an example frame):
By simply clicking on the spanner tool symbol you will get the control pages of the C8491 and the
status window on the left side, which is also shown on mouse over.
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digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
PRESETS
C8491
The C8491 has 3 banks of Presets. DSP Preset / SDI Preset / Failover/Upmix Preset.
The status window on the left hand side shows the names of the active presets. The word “modified”
will appear in line with the preset name, if any preset parameter was changed since loading this preset.
DSP is dedicated to audio processing (Leveler, Compressor / Limiter /
Load select a preset by name and press <LOAD NOW>.
Save as # select a preset NV memory number.
Name assign the preset a name (up to 16 digits).
and press <SAVE NOW>.
Expander).
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digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
Channels stored the soft LEDs show the channels which will be controlled by the
in presets active preset. The check boxes define which channels will be
stored when you save a preset.
The total number of channels which will be displayed (upper soft
LED line) or masked (lower line of check boxes) depends on the
operating mode of the DSP and the link condition of the channels
Here an example for DSP1 (Ch 1 – 8) set for 5.1 + 2 operating
SDI controls the SDI Embedder / De-Embdder including delays
Load select a preset by name and press <LOAD NOW>.
Save as # select a preset NV memory number.
Name assign the preset a name (up to 16 digits).
and press <SAVE NOW>.
Failover / Upmix the third group (#33 … #40) is intended for fail over and upmix
Load select a preset by name and press <LOAD NOW>.
Save as # select a preset NV memory number.
Name assign the preset a name (up to 16 digits).
and press <SAVE NOW>.
Processing blocks you can select the processing blocks will be stored in a preset.
Stored in presets I.e. you can change the parameters for one 2ch fail over without
involved in a program.
mode and DSP 2 (Ch 9 – 16) is set for 4 x 2 operating mode
while Ch 9/10 and 11/12 are linked for stereo operation and
13 -14 as well as 15 – 16 are not linked.
parameters.
changing the parameters for another one:
C8491
The number of processing blocks involved, depends on the
operating mode for the DSPs.
Preset Clipboard copy the active preset to a clip board, the data may be used by
Backup Presets to File creates a backup XML file which may be saved on a PC.
other modules inside the same frame.
Restore Presets from File you can select a backup file from a PC and restore the set of
presets.
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digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
DEVICE
C8491
Device Name you can assign the module a name (up to 16 digits)
Platform [c8491-1]
Hardware platform of the module
Parameter Version [x]
The firmware of the module has undergone a few revisions where
some parameter have been added while others became obsolete.
Important Note! It is mandatory to initialize the module to factory defaults if the parameter version has
changed in order to clean the memory from rubbish data. Other wise you may experience male
functions
FIRMWARE displays the firmware versions of the C8491 components:
Controller the module controller
DSP the processing DSP
FPGA the routing and interface for the DSP
SDI the firmware of the SDI board
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