network AAV-HD-DMUX User manual

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HD/SD Analog/Digital
Audio De-embedder
Rev. 1
Flashlink User Manual
AAV-HD-DMUX(-R) / AAV-SD-DMUX(-R)

AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
Network Electronics AS
P.O. Box 1020
N-3204 Sandefjord, Norway
Phone: [phone]
Fax: [phone]
Email: [email protected]
www.network-electronics.com
Support Phone: [phone]
Revision history
Current revision of this document is the uppermost in the table below.
Rev. Repl. Date Sign Change description
1 0 2008-07-10 NBS Updated formats to company standard
0 - 2007-06-05 MDH First revision derived from AV-HD-XMUX manual
rev3
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
Contents
Revision history..........................................................................................................2
1 Product overview....................................................................................................5
1.1 Audio signal flow ........................................................................................................... 6
1.2 Signal flow .................................................................................................................... 7
1.3 Data signal .................................................................................................................... 7
2 Specifications..........................................................................................................8
2.1 Measurement conditions ............................................................................................... 8
2.2 General ......................................................................................................................... 8
2.3 Processing ..................................................................................................................... 8
2.3.1 SD latencies................................................................................................................ 8
2.3.2 HD latencies ............................................................................................................... 8
2.4 Inputs............................................................................................................................ 8
2.4.1 Electrical video input................................................................................................... 8
2.4.2 Optical video input..................................................................................................... 9
2.4.3 Data inputs................................................................................................................. 9
2.5 Outputs......................................................................................................................... 9
2.5.1 Electrical video output ................................................................................................ 9
2.5.2 Analog audio outputs ................................................................................................. 9
2.5.3 Digital Audio outputs................................................................................................ 10
2.5.4 Data outputs ............................................................................................................ 10
2.5.5 GPI outputs .............................................................................................................. 10
3 Configuration .......................................................................................................11
3.1 DIP switch routing ....................................................................................................... 11
3.1.1 Destinations.............................................................................................................. 11
3.1.2 Sources..................................................................................................................... 12
3.1.3 Examples .................................................................................................................. 12
3.2 Other DIP Switches...................................................................................................... 13
3.2.1 DAC converter gain, SW1.7, SW2.7 and SW3.7 ........................................................ 13
3.2.2 DIP Configuration, SW1.8......................................................................................... 13
3.2.3 EDH insert, SW2.8 .................................................................................................... 14
3.2.4 AES Output 1&2 SW3.8............................................................................................ 14
3.3 GYDA Control.............................................................................................................. 14
3.3.1 Audio delay lines....................................................................................................... 14
3.3.2 Stereo audio processing............................................................................................ 14
3.3.3 RS422 Data port configuration ................................................................................. 15
3.3.4 Transport and shuffling of audio groups.................................................................... 15
3.3.5 Audio generator ....................................................................................................... 15
3.3.6 Video generator........................................................................................................ 15
3.3.7 Video input switching............................................................................................... 15
3.4 Data transmission ........................................................................................................ 16
3.4.1 Data latencies ........................................................................................................... 16
3.4.2 Embedding............................................................................................................... 16
3.4.3 De-embedding ......................................................................................................... 16
3.4.4 Limitations................................................................................................................ 16
4 Connections .........................................................................................................18
4.1 Audio connections DB25 ............................................................................................. 18
4.2 GPI/Data connections 8P8C Jack.................................................................................. 19
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
5 Operation .............................................................................................................20
5.1 Front panel LEDs.......................................................................................................... 20
5.2 GPI alarms ................................................................................................................... 20
6 Laser safety precautions ........................................................................................21
General environmental requirements for Network Electronics equipment................22
Product Warranty ....................................................................................................23
Appendix A Materials declaration and recycling information ...................................24
A.1 Materials declaration ................................................................................................... 24
A.2 Recycling information.................................................................................................. 24
EC Declaration of Conformity ..................................................................................25
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
1Product overview
The only difference between the AAV-SD-DMUX and the AAV-HD-DMUX is that
the latter can also handle HD SDI video.
The rest of the manual will only refer to the AAV-HD-DMUX.
The AAV-HD-DMUX is a highly integrated audio embedding module in the Flashlink range,
offering simultaneous embedding and de-embedding of audio from a digital HD or SD serial
video signal.
The modules can:
−AAV-HD-DMUX can handle SD and HD digital uncompressed video.
−AAV-SD-DMUX can handle SD digital uncompressed video.
−De-embed and embed all groups of audio.
−Copy or move audio groups without additional delay.
−De-embed 2 AES3 digital audio and non-audio signals.
−De-embed 4 analog audio signals.
−Apply extra audio delay.
−Swap stereo channels.
−Make mono or sum from stereo signals.
−Have optical input.
−Transport asynchronous serial data.
−Generate video and audio signals.
−De-glitch correctly synchronized switched video.
Figure 1: Module overview
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
The module has two main processing blocks. One processes the video stream and the packet
data, the other processes the audio. The packet processing core forms a group router which
can route embedded audio between groups without any extra delay.
The AAV-HD-DMUX audio core is an AES3 stereo audio router. The received embedded
audios are the sources in the router. The embedded output groups and audio outputs are
the destinations. This feature may also be used to perform stereo channel swapping.
Four stereo delay lines are also available in the router with a total combined delay of 1.25s.
Audio processing is possible within each stereo output. The channels may be changed
allowing L/R swapping, mono assignment, summing, MS conversion and phase reversal of
one of the signals.
All embedding and de-embedding is performed with synchronous 48 kHz audio.
The unit may be ordered with optional optical receivers. The optical receiver may be either
the HD single mode PIN, which will receive both HD and SD data rates; or the SD PIN
module, which has a multi-mode fiber. The module has signal generators for audio and
video for test and line up applications. The internal video generator may be used as a fall-
back source that is used if the both the electrical and the optical input signals fail. This allows
uninterrupted transmission of embedded audio. The user may also configure the module to
mute the outputs if the input signal disappears.
1.1 Audio signal flow
De-embedded
groups
1234
Embedded
groups
1
2
3
4
Audio
outputs
Silence
Stereo
tone
Group matrix
Stereo Matrix
1
2
Delay
1-4
3
4
Figure 2: Processing core overview
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
1.2 Signal flow
Video may be presented on the optical or electrical inputs. The module will switch to the
other input if the module can not lock to a signal. The video is re-clocked and transformed to
parallel video. The parallel video goes into a line buffer which is used to de-glitch the video
when switched on the correct line. No errors are flagged or produced when the video is
switched on the appropriate switching line. All ancillary data, including embedded audio is
extracted from the video signal. All the packed data is sent to the group router. The de-
embedded audio is sent to the stereo audio cross-point router.
The audio processing is performed on the stereo router outputs.
Four of the router outputs are connected to the four stereo delay lines. The outputs of the
delay lines are connected to four inputs of the stereo audio router.
The audio signal is delayed by a few samples during de-embedding, re-packeting the audio
and audio processing. Signals that pass through the stereo audio router will be delayed by a
small number of samples. The group router outputs from the de-embedders do not
introduce any additional delay as the audio does not require unpacking and re-packing.
The embedder core embeds either re-packeted audio from the stereo router or the existing
de-embedded audio as configured in the group router.
The embedded audio packets are inserted into the video signal together with the control
packets and any other packets that were present in the original video signal. The video is
serialized and output through the cable and laser drivers.
The audio signals are taken from the outputs of the audio router. Outputs 1&2 are sent to
the audio DACs (digital to analog converters) while output 3&4 are sent to the AES outputs
3&4. AES outputs 1&2 are extra AES outputs which may be fed with the audio data of either
outputs 1&2 or 3&4.
1.3 Data signal
The data signal is transported using the User bits in one of the embedded audio streams. De-
embedded data is output on the RS485 output and data received at the R422 input is
embedded into the output video. The configuration sets the audio source containing the
data signal to de-embed, the data format to be received on the backplane connector and
which output signal to embed data into.
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
2Specifications
2.1 Measurement conditions
Audio Sampling rate 48 kHz
Analog audio output level setting +18 dBu = 0dBFS
Ambient temperature 25ºC
2.2 General
Power: +5V DC 0.72A 3.6W
+/-15V DC 0.02A 0.6W
Control: DIP switches, GYDA system controller.
Monitoring: Front panel LEDs, GYDA system controller and GPI.
EDH/CRC processing: Full. Received flags are updated, new CRCs are
calculated.
Boot time: 1 second.
Digital audio outputs: Conform to AES3-2003
Video inputs and outputs: Conform to SMPTE 292M-1998
Data input and output: Conform to EIA RS-485
2.3 Processing
Video latency is variable due to the de-glitcher but the values below apply when the video
signal is first applied.
Other latency values are maximum values.
2.3.1 SD latencies
Video: des+4+350+256+2+ser video samples = 45.3us
Audio embedding: 2+1+16 audio samples = 19/48000 = 396us
Audio de-embedding: 4+16+1+29 audio samples = 50/48000 = 1.04ms
Embedding GPI mode: 8+4+32 96kHz samples = 44/96000 = 458us
Embedding UART mode: 32+128+17+16 96kHz samples = 193/96000 = 2.01ms
De-embedding GPI mode: 8+32+8 96kHz samples = 44/96000 = 458us
De-embedding UART mode: 8+32+8 96kHz samples = 48/96000 = 458us
2.3.2 HD latencies
Video: des+8+1024+1024+3+ser video samples = 27.6us
Audio embedding: 2+1+8 = 11/48000 = 833us
Audio de-embedding: 2+8+1+29 = 40/48000 = 229us
Embedding GPI mode: 8+4+16 96kHz samples = 28/96000 = 292us
Embedding UART mode: 16+128+17+16 96kHz samples = 177/96000 = 1.84ms
De-embedding GPI mode: 4+16+8 96kHz samples = 28/96000 = 292us
De-embedding UART mode: 4+16+8 96kHz samples = 28/96000 = 292us
2.4 Inputs
2.4.1 Electrical video input
AAV-HD-DMUX
Video Data rate: 270Mbps or 1,485Gbps
Video frame rate: 24p, 25i, 30i, 50p or 60p and pull down rates
AAV-SD-DMUX
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
Video Data rate: 270Mbps
Video frame rate: 25i and pull down 30i rates
Equalization: Automatic up to 35dB
Impedance: 75 ohm
Return loss: >15dB up to 1,5GHz
Signal level: Nom. 800mV
Connector: BNC
2.4.2 Optical video input
Optical wavelength: 1200-1620nm ±40 nm
Maximum Optical power: 0 dBm HD PIN.
Minimum Optical power HD/ SD: -24/-26 dBm with HD PIN.
Return loss: Better than 27 dB.
Maximum reflected power: 4%
Transmission circuit fiber: Single mode HD PIN/ (Multi-mode option on request).
Multi-mode PIN is standard with AAV-SD-DMUX
Connector: SC/UPC
2.4.3 Data inputs
RS422: 1
Connector: 8P8C Jack
Packet mode:
Baud rates: 9600 to 115200
Data length: 7 or 8 bits
Parity: None, odd or even
Stop bits: 1, 1.5 or 2 bits
GPI mode:
Raw data sampling frequency: 93750 Hz
2.5 Outputs
2.5.1 Electrical video output
Number of HD/SDI outputs: 1
Connector: BNC
Impedance: 75 ohm
Return loss: > 15 dB to1.5GHz
Signal level: nom. 800mV.
Rise/fall time: typically 650ps. @270Mbps. < 270ps @1.485Gbps
2.5.2 Analog audio outputs
Number of outputs: 4.
Sampling frequency: 48 kHz.
Differential output impedance: 53 ohms.
Common mode output impedance: 20 kohm.
Connector (C1 backplane): 25 pin D-sub female.
Maximum signal level (0 dBFS): +24dBu or lower in 0.5 dB steps.
Common mode voltage tolerance: +50V, -0V
Frequency response: 20 Hz – 20 kHz +/-0.1 dB
Pass-band ripple: +/- 0.002 dB
Stop band attenuation: 82 dB
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
Dynamic range1: Min. 99 dB (A)2;
Typ. 105 dB(A) 0 dBFS = +18dBu
THD+N @ -1 dBFS: Max. -85 dB, typical -96 dB.
Intermodulation distortion3: Max. -90 dB
Crosstalk: Max. -90 dB, typical -95 dB.
CMRR (1kHz BBC method): Max. 46 dB, typical 65 dB.
2.5.3 Digital Audio outputs
Number of AES3 outputs: 4
Audio data rate: 48 kHz
Impedance (C1 backplanes): 110 ohm transformer balanced.
Connector (C1 backplanes): 25 pin D-sub female.
2.5.4 Data outputs
Number of RS485 outputs: 1
Connector: 8P8C Jack
2.5.5 GPI outputs
Signals: Power status good, no video input lock, laser failure.
Connector: 8P8C Jack
Signal type: Open drain transistor with free-wheel diode.
Maximum voltage: 100 V
Maximum current: 150 mA
1|THD+N of -60 dBFS 1 kHz signal| + 60
2Dynamic range scales with output full scale level. Minimum result is obtained with 0dBFS = +12dBu
3Signal at -12 dBFS, SMPTE 4:1 60 Hz + 7 kHz
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
3Configuration
The XMUX embedding core can be considered as a 14x16 stereo audio router and a 5x4
group router.
The group router is used to transport or shuffle groups without introducing any additional
delay.
The inputs or sources in the stereo router are from the de-embedded audio groups, the delay
line outputs and the two built in generators.
The stereo router outputs or destinations are the groups of embedded audio in the output
video, the audio outputs and the delay line inputs.
A normal de-embedder configuration would route the de-embedded audio to the audio
outputs.
The AAV-HD-DMUX module can de-embed and re-embed/ shuffle at the same time!
Many other configurations are possible and the module may be dynamically controlled as a
14x16 audio router via the system controller, GYDA.
Full control of the module is performed with the GYDA system controller. Controls only
possible with GYDA are:
−The data transmission parameters and channel selection.
−The output processing of each stereo signal (LR, RL, LL, RR, MS, Sum, ØLR, LØR).
−The delay lines delays and routing.
−Video and audio generator configuration.
3.1 DIP switch routing
Full hardware control of all of the parameters in the module would require either, a
complicated menu type of control interface with a display and control buttons; or an
enormous number of switches. In many cases, most of the parameters will not be changed
from the default settings. It was decided to control only the most used parameters with
switches. This still requires the use of 24 switches.
The switches are only read if SW1.8 (DIP configuration mode) is in the on position (see
Chapter 3.2.2).
There are not enough switches on the module to allow full stereo routing configurations.
Groups of four channels are routed together as units, for example: AES input channels 1&2,
embedded audio group 1.
3.1.1 Destinations
Table 1: Routing control switches
SW1 SW2 SW3
Group1 Group2 * * Group3 Group4 * * DAC 1&2 AES 3&4 * *
1 2 3 4 5 6 78 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
The switches control the routing of signals to the outputs or destinations. There are four
embedded audio groups and two pairs of audio outputs. The configuration assigns sources
to output groups and pairs of stereo audio outputs. This allows the same input signals to be
routed to several outputs.
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
There is a group of three switches for each of the outputs. The combination of the three
switches set the input source or disables the output e.g.
−Group 1 embedded output is controlled by switches on SW1 positions 1, 2 and 3.
−The analog audio outputs are controlled by switches on SW3 positions 1, 2 and 3.
3.1.2 Sources
There are eight possible permutations of the switches. Seven of the permutations choose the
input sources. One of the settings (off, off, off) is used to disable the group embedding or set
the AES outputs to silence.
Table 2: Source switch encoding
Switch Output
disabled
group1 group2 group3 group4 DAC
1&2
AES
3&4
Stereo
tone
1 or 2 on on on
2 or 5 on on on on
3 or 6 on on on on on
3.1.3 Examples
Figure 3: Example 1
The module above (Figure 3) is set to the following:
−Group1 output is embedded with signals from AES1&2 inputs
−Group2 output is embedded with signals from AES3&4 inputs
−Group3 output is embedded with signals from de-embedded group3
−Group4 output is not embedded
−Analog DAC outputs signals from de-embedded group1
−AES 3&4 outputs signals from de-embedded group2
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
Figure 4: Example 2
The module above (Figure 4) is set to the following:
−Group1 output is embedded with signals from de-embedded group1
−Group2 output is embedded with signals from AES1&2 inputs
−Group3 output is embedded with signals from AES3&4 inputs
−Group4 output is not embedded
−Analog DAC outputs signals from de-embedded group1
−AES 3&4 outputs signals from de-embedded group1
Users familiar with binary numbers may see that source numbers 1 to 4 (001 to 100)
correspond to groups 1 to 4. Binary numbers 5 (101) and 6 (110) are not used on this
module.
3.2 Other DIP Switches
3.2.1 DAC converter gain, SW1.7, SW2.7 and SW3.7
The DAC convert output levels may be set to one of the eight preset levels with the DIP
switches. The analog levels correspond to the maximum sine wave level, otherwise known as
0 dBFS. The three switches are labeled S2, S1 and S0 on the board. The combinations of the
three switches set up the output level as shown in the table. 0 is off or down, 1 is on or up.
S2,S1,S0 000 001 010 011 100 101 110 111
Level
(dBu)
+12 +13.5 +15 +16.5 +18 +20 +21 +24
All four input levels are set by the DIP switches in DIP configuration mode. GYDA can set the
levels for each channel individually.
3.2.2 DIP Configuration, SW1.8
SW1.8 on, forces the DIP switch configuration to be used. If there is a GYDA present, the
switch configuration on the module will be used and the configuration will be just be
monitored in the GYDA controller.
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
SW1.8 off will not use the DIP switches but will be configured from either the stored
configuration in the module or from GYDA if there is GYDA present. The configuration will
be stored when a GYDA configuration command is used. Therefore if a GYDA is present, the
internal configuration will be overwritten by the GYDA controller.
The switch settings are only read when the module is powered up.
The DIP switch settings control the routing and a couple of other important settings. Other
stored settings, such as data embedding and generator settings will always be used.
3.2.3 EDH insert, SW2.8
SD video output from the module will only contain an EDH packet if SW2.8 is on.
3.2.4 AES Output 1&2 SW3.8
AES outputs 1&2 are extra outputs fed either from the same signals as the DAC converters or
the AES outputs 3&4. AES outputs 1&2 are fed with the same signals as the DAC converters
if the switch is in the off position.
3.3 GYDA Control
Full control of the stereo audio router is possible with the GYDA system controller. The
module stores its routing configuration in non-volatile memory when a GYDA command is
given. This allows complex configurations to be restored after a power loss.
If a GYDA system controller is present, the last configuration of the module will
be only be restored by GYDA if SW1.8 is off. The intention is that SW1.8 is used
to show that the card is manually configured when switched on.
3.3.1 Audio delay lines
The unit has four stereo audio delay lines connected to the audio router. Audio to be delayed
is routed to one of the delay inputs and the output of that delay is routed to the intended
output. The length of each delay line is set up on the configuration page of GYDA. The
maximum delay for each of the four delays is 16384 audio samples, which is about 341ms.
The delay lines may be cascaded if longer delays are required.
3.3.2 Stereo audio processing
The output of each stereo signal may be manipulated (LL, RR, LR, RL ØLR, LØR, L+R/2, MS)
this is controlled with the GYDA controller.
The stereo signals may be output in one of the following ways:
−LR, Left / Right No change.
−RL, Right/ Left Channels are swapped.
−LL, Left/ Left Left channel is copied into the right channel.
−RR, Right/ Right Right channel is copied into the left channel.
−ØLR, ØLeft/ Right The left channel is phase inverted.
−LØR, Left/ ØRight The right channel is phase inverted.
−L+R/2, Left + Right The left and right channels are summed.
−MS, MS/AB The left and right channels are converted from AB stereo to MS
stereo.
The sum products (L+R/2 and MS) are reduced in level by 6 dB to avoid any possibility of
clipping.
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
3.3.3 RS422 Data port configuration
The RS422 data 8P8C Jack input must be configured with GYDA. The baud rate, data length,
parity and stop bits must be configured if UART mode is used.
The router destination where the data is to be embedded must be set up and the source
channel containing the received data that will be output on the 8P8C Jack must be also be
configured. See also Chapter 3.4 below.
3.3.4 Transport and shuffling of audio groups
The AAV-HD-DMUX stereo audio router involves de-embedding, buffering and re-embedding
which introduces a small delay relative to the video signal.
The group router is used to avoid this extra delay. Groups that only pass through the group
router are re-embedded in the same video line. This avoids any extra delay and means that
incompatible audio formats (asynchronous audio) may still be transported. The AAV-HD-
DMUX automatically uses the group router whenever possible when controlled with the DIP
switches.
“Shuffling” of groups is when existing embedded audio groups are re-assigned to different
groups. Copying of groups is also possible i.e. Group 1 may be transported to Group 1 and
duplicated to Group 2. This function also takes place in the group router which means that
there is no extra delay.
3.3.5 Audio generator
The stereo audio generator is available in the audio router as a source. It is a high purity 1
kHz sine wave with a 250ms interruption on the left channel every 3 seconds. The audio
level may be set to one of two standards. The two levels are -18 dBFS and -20 dBFS. These
two levels correspond to EBU R68 and SMPTE RP 155.
3.3.6 Video generator
The video generator has several different simple signals:
−Color bar, 100% white, 75% colors, no set-up level.
−Red, Green, Blue or Black full field.
The generator may be used as the video source if there is no video signal present at either of
the video inputs. The generator may also be switched on with GYDA. This will override video
input but the generator signal will be locked to the input.
The video standard of the generator may be set with GYDA but only if there is no video
input present.
3.3.7 Video input switching
The default mode of operation is auto-switch between the optical and electrical inputs. The
video output may be configured to either use the internal generator, or to switch off when
no video is detected on the inputs. The card will use the internal generator while it switches
between inputs until it finds a valid video signal.
The video generator may be selected to override the input video picture. The input video will
decide the timing of the output video and any embedded packets will still be used by the
module. Only the picture will be overwritten.
This setting will only be restored when GYDA is present, as the generator picture may only
be switched off again with GYDA.
Upstream video switching in a router causes glitches in the digital video. The module will
remove these glitches if the switch occurs on the correct video line for the standard in use.
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
The input buffer is two video lines of the longest standard and starts in the middle.
Subsequent switches will be transparent if the new signal is within a line from the original
video. There will be a glitch on the output if the new video phase is outside of this range and
the buffer will be re-aligned to the middle with the new signal phase.
3.4 Data transmission
The module can de-embed and embed asynchronous data. An AES3 audio signal is used as a
carrier. Both embedded audio and normal AES3 signals may be used to carry the RS422
data. The fiber connection usually only goes one direction so any desired return path must
be created by the user with another circuit. Return data may be sent over fiber via a link
comprising of AAV-HD-DMUX, D422 or D422-MG modules.
The 8P8C Jack data input works in one of two modes:
UART Mode: The data is checked for correct reception according to the configuration. The
data words are packaged and sent when present.
Raw sampling mode: The data input is sampled at 93.75 kHz and embedded as a data
stream. No checking is performed.
3.4.1 Data latencies
The data channel has a total latency of approximately 30us when using raw sampling.
Normal data rates of up to 9600 may be used with raw data sampling to have a low latency.
The latency is 500us when using the normal data encoding due to the block structure of the
AES User bits.
The configuration of the data channel is always stored in the module and used regardless of
the GYDA override switch.
3.4.2 Embedding
The AAV-HD-DMUX has a RS422 data input for the embedding of control data. The baud
rate and other parameters are configured with GYDA. The factory default is 115200 baud, no
parity, one stop bit.
The data channel is encoded in the User bits in an embedded audio stereo signal assigned
with GYDA. The factory default is Audio channels 1&2 in Group 1.
The data is sampled asynchronously at a constant bit rate. The range of baud rates is from
DC to 115,200 bps. The data bytes are either encoded as packets in the transmitted data or
transmitted as an asynchronous bit stream which may also be used to transmit a DC signal
such as GPI.
3.4.3 De-embedding
The audio channel with the data signal to be de-embedded must be configured by GYDA as
there may be several data channels available.
The AAV-HD-DMUX will automatically detect the data channel format when present and
output the data on the 8P8C Jack connector. The output driver will only be active when data
is output in UART mode. The means that the output is always active when raw data is used.
3.4.4 Limitations
1. There is one thing the user must do in order to receive embedded data. The audio
source where the data is embedded must be routed to a destination in the stereo
router. This is because the extraction of the data takes place on the output of the
router.
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
Example: Data is to be de-embedded from embedded audio channels 1&2.
Embedded audio channels 1&2 routed to output to Delay 4.
2. The normal UART mode checks the data when receiving and only embeds valid
bytes. The data format must be correct. This also means that a BREAK condition of
many spaces will not be detected or transmitted. Contact support if this is a
requirement.
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
4Connections
One backplane is presently available for the AAV-HD-DMUX and AAV-SD-DMUX.
Figure 5: AAV-DMUX-C1
The AAV-DMUX-C1 is the standard backplane/ connector module with BNC video electrical
inputs and outputs. A 25 pin d-sub type connector is provided for the analog and AES3
audio inputs and outputs. The pin configuration used is the industry standard TASCAM DA-
88 type so that commercially available 'snakes' may be used.
4.1 Audio connections DB25
Figure 6: D-sub 25 audio connector wiring
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
4.2 GPI/Data connections 8P8C Jack
Figure 7: 8P8C connector layout
Pin number Description
1 Power present
2 No Video signal
3 Laser failure
4 RS485/422 output +
5 RS485/422 output -
6 RS422 input +
7 RS422 input -
8 Ground
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AAV-HD-DMUX(-R)/ AAV-SD-DMUX(-R) Rev. 1
5Operation
Figure 8: LED overview
(Text not printed on the front panel). Each module has 4 LED’s. The colors of each of the
LED’s have different meanings as shown in the tables below.
Card status
Input status
Group 1&2
status
Group 3&4
status
AAV-HD-XMUX
5.1 Front panel LEDs
Diode \ state Red LED Orange LED Green LED No light
Card status PTC fuse has
been triggered
or FPGA
programming
has failed
Module has not
been
programmed
Module is OK Module has no
power
SDI input status Video signal
absent.
Electrical video
signal present
Optical video
signal Present
Module has not
been
programmed
Embedded
group 1&2
status:
Group 1 & 2 not
present
Either group 1
or 2 present
Both group 1 &
2 present
Module has not
been
programmed
Embedded
group 3&4
status:
Group 3 & 4 not
present
Either group 3
or 4 present
Both group 3 &
4 present
Module has not
been
programmed
5.2 GPI alarms
Only three alarms are present on the 8P8C Jack connector as four of the pins are used for the
RS422 data port.
The three alarms are:
−Power present (negative logic)
−Video signal lost
−Laser failure
An active alarm condition means that the transistor is conducting.
The power present alarm should always be active during normal operation.
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