network AVA-DMUX User manual

network-electronics.com
Fiber to Analog Video and Audio
module
Rev. 2
Flashlink User Manual
AVA-DMUX

AVA-DMUX Rev. 2
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Nevion AS
P.O. Box 1020
N-3204 Sandefjord, Norway
Phone: [phone]
Fax: [phone]
Email: [e-mail]
www.nevion.com
Support Phone: [phone]
Revision history
Current revision of this document is the uppermost in the table below.
Rev.
Repl.
Date
Sign
Change description
2
1
2009-03-20
NBS
Total update, following from replacing discontinued
AAV-DMUX with new AAV-SD-DMUX
1
0
2007-10-15
AS
New front page.
0
-
2006-03-09
MDH
First release of product.

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Contents
1 Product overview ..................................................................................................... 5
1.1 AVA-DMUX-C2................................................................................................................ 5
1.2 AAV-SD-DMUX(-R) ......................................................................................................... 5
1.3 DAC-SDI ......................................................................................................................... 5
1.4 Signal flow....................................................................................................................... 6
2 Specifications .......................................................................................................... 7
2.1 Measurement conditions.................................................................................................. 7
2.2 General ........................................................................................................................... 7
2.3 Processing....................................................................................................................... 7
2.3.1 SD latencies AAV-SD-DMUX........................................................................................ 7
2.3.2 SD latencies DAC-SDI.................................................................................................. 7
2.4 Inputs .............................................................................................................................. 7
2.4.1 SD-SDI input: ............................................................................................................... 7
2.4.2 Optical input: ................................................................................................................ 8
2.4.3 Black Burst reference input........................................................................................... 8
2.4.4 Data inputs ................................................................................................................... 8
2.5 Outputs............................................................................................................................ 8
2.5.1 Video outputs ............................................................................................................... 8
2.5.2 Analog Audio outputs: .................................................................................................. 8
2.5.3 Digital Audio outputs..................................................................................................... 9
2.5.4 Data outputs ................................................................................................................. 9
2.5.5 GPI outputs .................................................................................................................. 9
2.6 Connector module ........................................................................................................... 9
2.6.1 AVA-DMUX-C2............................................................................................................. 9
2.6.2 Mounting the connector module.................................................................................... 9
3 Configuration ......................................................................................................... 10
3.1 Audio (AAV-SD-DMUX)..................................................................................................10
3.1.1 DIP switch routing........................................................................................................10
3.1.2 Other DIP Switches .....................................................................................................12
3.1.3 GYDA Control..............................................................................................................13
3.1.4 Data transmission........................................................................................................14
3.2 Video (DAC-SDI) ............................................................................................................15
3.2.1 DIP switches................................................................................................................15
3.2.2 Pushbuttons ................................................................................................................16
3.2.3 Monitoring and control of DAC-SDI with Gyda .............................................................17
4 Connections........................................................................................................... 18
4.1 Audio connections DB25 ................................................................................................18
4.2 GPI/Data connections 8P8C Jack...................................................................................19
5 Operation............................................................................................................... 20
5.1 DAC-SDI LEDs...............................................................................................................20
5.2 AAV-SD-DMUX LEDs.....................................................................................................20
5.3 GPI alarms .....................................................................................................................21
6 Limitations ............................................................................................................. 22
7 Laser safety precautions........................................................................................ 23
General environmental requirements for Nevion equipment..................................... 24
Product Warranty...................................................................................................... 25
Appendix A Materials declaration and recycling information..................................... 26

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A.1 Materials declaration ......................................................................................................26
A.2 Recycling information.....................................................................................................26
EC Declaration of Conformity ................................................................................... 27
EC Declaration of Conformity ................................................................................... 28

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1 Product overview
The AVA-DMUX unit actually consists of three modules:
−The AVA-DMUX-C2 connector backplane.
−The AAV-SD-DMUX(-R) AES and Analog Audio De-embedder (with optical receiver).
−The DAC-SDI universal SDI to Analog Video converter.
1.1 AVA-DMUX-C2
The AVA-DMUX backplane has all the necessary connections for the audio and video
signals. It also has all of the inter-connections between the two processing cards. There is no
SDI output.
1.2 AAV-SD-DMUX(-R)
The AAV-SD-DMUX is a highly integrated audio embedding module in the Flashlink range,
offering de-embedding of audio from a digital SD serial video signal.
In the AVA-DMUX application, the AAV-SD-DMUX can:
−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.
The optical receiver is compatible with both single and multi-mode optical fiber and may be
used as a receiver in point to point, CWDM and DWDM configurations.
1.3 DAC-SDI
The Flashlink DAC-SDI is a high-quality 10-bit digital 4:2:2 to NTSC/PAL composite encoder
and component (4 outputs, 54MHz oversampled) analog video converter.
The card can produce both composite and component formats simultaneously on the
outputs.
The input frame buffer (9 fields) and adjustable horizontal delay can provide a programmable
delay relative to the input signal or, when present, the reference black-burst signal. A low
latency mode is also available if the frame buffer is not to be used.
The analog output video is synchronous to the input signal if no black-burst signal is present.
If a stable black-burst reference signal is present, the output video will be synchronous to the
reference.
If the input SDI signal has a field one identifier signal embedded in line 7, the DAC-SDI will
synchronize to the correct 8 field pal or 4 field NTSC frame sequence.
DAC-SDI may be configured via switches on the unit, or via the GYDA control interface.

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1.4 Signal flow
Figure 1: AVA-DMUX signal flow
The digital video comes either through the SDI receiver or the optical receiver. EDH
information is processed in the de-serializer and the signal passes to the de-embedding
processor. The video signal is then re-serialized and sent to the frame synchronizer. The
output of the frame synchronizer is sent to the video d/a converter chip where it is decoded
into the required format. The outputs are filtered and the dc levels are corrected.
The digital audio comes from the de-embedding processor and goes to the d/a converters.
The gain is adjusted before the audio is fed to each of the outputs.
The de-embedder 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-SD-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

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2 Specifications
2.1 Measurement conditions
Audio Sampling rate:
48 kHz.
Ambient temperature:
25ºC.
Measurement bandwidth:
20 Hz-20 kHz.
Detector:
RMS.
Input overload level (0 dBFS):
+18 dBu.
2.2 General
Power, AAV-SD-DMUX:
+5V DC / 0.72A, 3.6W
+/-15V DC / 0.02A, 0.6W.
Power, DAC-SDI:
+5V DC / 0.62A, 3.1W,
-15V DC / 0.46A, 0.7W.
Control:
DIP switches, Gyda system controller.
Monitoring:
Front panel LED’s and GYDA system controller.
EDH processing:
Full. Received flags are updated; new CRCs are
calculated.
De-embedding level: SMPTE S272M C – Synchronous audio at 48 kHz
and extended data packets.
Total Audio Delay:
To be measured.
Total Video Delay:
To be measured.
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 AAV-SD-DMUX
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 SD latencies DAC-SDI
Video:
3us; when locked to Black Burst: 1-2 frames.
2.4 Inputs
2.4.1 SD-SDI input:
Video Data rate:
270Mbps.
Video frame rate:
50 Hz or 60 Hz.
Equalization:
Automatic up to 35dB.
Impedance:
75 Ω.
Return loss:
>15dB @270MHz.
Signal level:
Nominally 800mV.
Connector:
BNC.

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2.4.2 Optical input:
Transmission circuit fiber:
Multi-mode 50/120 µm.
Optical wavelength:
1200-1550nm ±40nm.
Maximum Optical power:
0 dBm.
Minimum Optical power:
-26 dBm.
Return loss:
better than 40 dB typ.
Maximum reflected power:
4%.
Connector:
SC/UPC.
2.4.3 Black Burst reference input
Input signal:
SMPTE 170M/ PAL ITU 624-4
Return loss:
> 35 dB up to 5.75MHz
Termination:
75 Ω
2.4.4 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 Video outputs
Number of video outputs:
4
Formats:
YUV+CVBS, RGB+CVBS, YC+Y+CVBS,
YC+BB+CVBS
Connector:
BNC
Impedance:
75 Ω
Return loss:
> 35dB up to 5.75 MHz
Signal level:
1V.
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
Dynamic range1
Min. 99 dB (A)
:
2
THD+N @ -1 dBFS:
;
Typ. 105 dB(A) 0 dBFS = +18dBu.
Max. -85 dB, typical -96 dB.
Intermodulation distortion3
Max. -90 dB
:
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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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
2.6 Connector module
2.6.1 AVA-DMUX-C2
Figure 2: AVA-DMUX-C2
2.6.2 Mounting the connector module
The details of how the connector modules are mounted can be found in the user manual for
the sub-rack frame: FR-2RU-10-2.
This manual is available from our web site: http://www.nevion.com/

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3 Configuration
3.1 Audio (AAV-SD-DMUX)
The DMUX 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-SD-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.
3.1.1 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 3.1.2.2).
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.
3.1.1.1 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
7
8
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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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.
3.1.1.2 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
3.1.1.3 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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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.
3.1.2 Other DIP Switches
3.1.2.1 Audio 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.
3.1.2.2 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.
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

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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.
3.1.2.3 EDH insert, SW2.8
SD video output from the module will only contain an EDH packet if SW2.8 is on.
3.1.2.4 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.
3.1.3 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.
3.1.3.1 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.
3.1.3.2 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.
3.1.3.3 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 3.1.4 below.
3.1.3.4 Transport and shuffling of audio groups
The AAV-SD-DMUX stereo audio router involves de-embedding, buffering and re-embedding
which introduces a small delay relative to the video signal.

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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-SD-
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.
3.1.3.5 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.
3.1.3.6 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.
3.1.4 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-SD-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.
3.1.4.1 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.
3.1.4.2 Embedding
The AAV-SD-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.

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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.
3.1.4.3 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-SD-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.
3.1.4.4 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.
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.
3.2 Video (DAC-SDI)
3.2.1 DIP switches
3.2.1.1 Manual mode
DIP switch 1 should be in the ON position if the card is to be controlled with the other DIP
switches. If the switch is OFF then the card starts with the stored configuration and the other
switches are ignored. GYDA is always able to re-configure the card but the new configuration
will only be remembered if switch 1 is OFF.

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3.2.1.2 Video output mode
DIP switches 2 and 3 configure the output modes as shown in the table.
Switch
Output Video Mode
3
2
0
0
RGB component and Composite
0
1
YUV component and Composite
1
0
Composite, Y, C and Y
1
1
Composite, Y, C and Black-Burst
3.2.1.3 Vertical interval blanking
DIP switch 4 should be in the ON position if the active video lines in the video blanking
interval should be erased or blanked.
3.2.1.4 Color bar generation
DIP switch 5 should be switched ON if a color bar signal is to be generated. The output will
be frequency locked to the reference if present but the phase is arbitrary.
3.2.1.5 Minimum delay mode
DIP switch 6 should be switched ON if conversion with low delay is required. The reference
input is not used in this mode and the frame synchronizer is bypassed.
3.2.1.6 Video standard
DIP switch 7 sets the default video system. OFF is 525/60 (NTSC). ON is 625/50 (PAL). This
switch is used to determine the internal configuration while the card is booting, and before a
valid signal is applied. Any valid input signal will override this setting.
3.2.1.7 Restore factory settings
DIP switch 8 should be used if the card is to be reset to the factory configuration. This will
also reset the delay parameters to zero. The card is reset when the card is powered up with
this switch set ON. DIP switch 8 should be set back to the OFF position and the card should
then be reset.
Note: The reset button at the top of the card may be used instead of removing the card or
switching the power supplies on and off.
3.2.1.8 Reserved switches
DIP switch 9 is reserved for future use and should be in the OFF position. DIP switch 10
chooses programming or run mode and should always be in the ON position.
3.2.2 Pushbuttons
The DAC-SDI has three push-buttons at the front of the card. The upper button is used to
reset the card while the other two, located next to the LEDs, are used to adjust the output
timing parameters.
3.2.2.1 Adjustment mode
To avoid the possibility of unauthorized tampering, the button interface must be enabled by
holding both the INC and DEC buttons depressed. The two lower LEDs on the front of the
card will blink alternately while the buttons are depressed.
Sub-carrier phase adjustment is selected if the buttons are released when the third LED
(Frame Lock) is lit.
Horizontal delay adjustment is selected if the buttons are released when the bottom LED
(EDH) is lit.
3.2.2.2 Sub-carrier phase adjustment
The Frame Lock LED continues to blink, to indicate that you may adjust the phase. The
phase is incremented and decremented in 256 steps. A phase adjustment from 0° through
360° is available. The single step size is approximately 1.41° around 0. The adjustment is
made with the INCrement and DECrement buttons. When the maximum range is

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encountered, the phase angle will wrap-around. These buttons have an auto-repeat function,
much like the way a normal keyboard works. During auto-repeat, the Frame Lock LED will
light continuously. After a 6 second idle period, the newly adjusted phase is committed to
EEPROM, and the adjust-state is exited.
3.2.2.3 Horizontal delay adjustment
The EDH LED will continue to blink, to indicate that you may adjust the horizontal delay. The
horizontal delay is incremented and decremented in steps of 37.0 ns with the INCrement and
DECrement buttons. 2048 such steps are available, giving an adjustment range of ±37.9 µs
PAL and NTSC. During auto-repeat, the EDH LED will light continuously. When neither the
INC nor the DEC button has been touched for 6 seconds, the newly adjusted delay is
committed to EEPROM memory, and the adjust-state is exited.
3.2.3 Monitoring and control of DAC-SDI with Gyda
The Gyda controller card receives information about the configuration and the operating
status of the card. The displayed information includes:
−Firmware and FGPA versions
−Slot label
−Output video mode
−Video standard
−Input SDI signal strength
−Reference status
−EDH status and counter
−Alarms
The configuration page allows control of the following configuration parameters
−Enable/ disable color burst.
−Enable/ disable chrominance.
−Enable/ disable color bar.
−Enable/ disable blanking of the active video in the vertical interval.
−Output configuration.
−Horizontal delay adjustment.
−Color phase adjustment.
−Card label.

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4 Connections
A 25 pin d-sub type connector is provided for the audio 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 5: D-sub 25 audio connector wiring
Pin
Signal
Pin
Signal
1
2R (+)
14
2R (-)
2
2R (GND)
15
2L (+)
3
2L (-)
16
2L (GND)
4
1R (+)
17
1R (-)
5
1R (GND)
18
1L (+)
6
1L (-)
19
1L (GND)
7
AES 4 OUT (+)
20
AES 4 OUT (-)
8
AES 4 OUT (GND) 21 AES 3 OUT (+)
9
AES 3 OUT (-)
22
AES 3 OUT (GND)
10
AES 2 OUT (+)
23
AES 2 OUT (-)
11
AES 2 OUT (GND)
24
AES 1 OUT (+)
12
AES 1 OUT (-)
25
AES 1 OUT (GND)
13
GND

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4.2 GPI/Data connections 8P8C Jack
Figure 6: 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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5 Operation
Figure 7: AVA-DMUX LEDs
(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.
5.1 DAC-SDI LEDs
Diode \ state
Red LED
Orange LED
Green LED
No light
Power
Major error.
Remove module
n/a
Module power is
OK
Module has no
power
SDI Input
Video signal
absent.
Weak signal
present
Good signal
present
Frame lock
No reference BB
BB present but
unable to lock
BB reference
present
Minimum delay
mode
EDH status
Errors detected
n/a
No errors
detected
5.2 AAV-SD-DMUX 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
Input status
Video signal
absent.
Electrical video
signal present
Optical video
signal Present
Module has not
been
programmed
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
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