A.2 Recycling information ...................................................................................................38
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HD-TD-3GMX-2 / HD-TD-3GDX-2 and SDI-TD-3GMX-5 / SDI-TD-3GDX-5 Rev. F
1 The multiplexer / de-multiplexer pair at a glance
The SDI-TD-3GMX-5 is a Flashlink time-division multiplexer (TDM) that either allows any
pair of supported HD-SDI or SD-SDI inputs or a single HD-SDI or SD-SDI input, plus up to
4 SD-SDI inputs to be transported over a single 3GHD-SDI link.
The SDI-TD-3GDX-5 is a Flashlink time division de-multiplexer that either recovers the 2
HD-SDI/SD-SDI streams or the single HD-SDI/SD-SDI stream plus 4xSD-SDI streams from
the 3GHD transport signal. The selection is automatic, based on what is detected in the
stream.
The HD-TD-3GMX-2 is a Flashlink time-division multiplexer (TDM) that allows any pair of
supported HD-SDI or SD-SDI inputs to be transported over a single 3GHD-SDI link.
The HD-TD-3GDX-2 is a Flashlink time division de-multiplexer that recovers the 2 HDSDI/SD-SDI streams from the 3GHD transport signal.
Other key features of the multiplexer / de-multiplexer pair include:
Supports all the most common video standards including SDTI.
Accepts any combination of synchronous or asynchronous HD-SDI 1485 Mbps or
SD-SDI 270 Mbps input formats, as long as the video standard is supported. Correct
video formats will be recovered at the de-multiplexer end.
Separate stream clock reference data for each channel is transferred for remote
clock regeneration. Correct clocks will be recovered at the de-multiplexer end.
Automatic input format detection for each channel.
All streams embedded in the 3GHD transport signal are completely independent. No
cross-contamination of the other stream when one input is lost.
Low latency.
Can be combined with SDI-TD-MUX-4 and SDI-TD-DMUX-4 modules to transport
up to 8 SD-SDI channels over one 3GHD link.
High performance optics for short and long haul applications available, including
CWDM and DWDM.
Optical and electrical 3GHD TDM outputs are available simultaneously from the
multiplexer cards, if purchased with an optional laser.
Change-over functionality between de-multiplexer electrical and optical inputs.
The transport signal is compliant with the SMPTE-425M Layer B standard and will
always be marked as 1080/30P. Standard 3GHD infrastructure can be used to
transport the multiplexed signal.
Multicon interface allows remote control, status monitoring, error reporting and
SNMP support.
The HD-TD-3GMX-2 and HD-TD-3GDX-2 can be field upgraded to the SDI-TD-
3GMX-5 and SDI-TD-3GDX-5 respectively if the need arises.
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HD-TD-3GMX-2 / HD-TD-3GDX-2 and SDI-TD-3GMX-5 / SDI-TD-3GDX-5 Rev. F
SDI-TD-3GMX-5
5-input multiplexer over 3GHD-SDI with electrical
output, supporting transportation of 1xHD-SDI +
4xSD-SDI or 2xHD-SDI/SD-SDI.
SDI-TD-3GMX-5-13T, -5.0dBm
As SDI-TD-3GMX-5, with the addition of an optical
output based on a 1310nm, -5dBm transmitter.
SDI-TD-3GMX-5-C1xxx
As SDI-TD-3GMX-5, with the addition of an optical
CWDM output based on a 0dBm transmitter.
SDI-TD-3GMX-5-D15xx.xx, 0dBm
As SDI-TD-3GMX-5, with the addition of an optical
DWDM output based on a 0dBm module.
SDI-TD-3GMX-5-D15xx.xx, 5.0dBm
As SDI-TD-3GMX-5, with the addition of an optical
DWDM output based on a +5.0dBm module.
SDI-TD-3GDX-5
5-output 3GHD-SDI to HD-SDI/SD-SDI de-multiplexer
with electrical input.
SDI-TD-3GDX-5-R
5-output 3GHD-SDI to HD-SDI/SD-SDI de-multiplexer
with electrical input and a short haul optical receiver.
SDI-TD-3GDX-5-R-L
5-output 3GHD-SDI to HD-SDI/SD-SDI de-multiplexer
with electrical input and a high sensitivity long haul
optical receiver.
HD-TD-3GMX-2
2-input multiplexer over 3GHD-SDI with electrical
output, supporting transportation of 2x HD-SDI/SDSDI.
HD-TD-3GMX-2-13T, -5.0dBm
As HD-TD-3GMX-2, with the addition of an optical
output based on a 1310nm, -5dBm transmitter.
HD-TD-3GMX-2-C1xxx
As HD-TD-3GMX-2, with the addition of an optical
CWDM output based on a 0dBm transmitter.
HD-TD-3GMX-2-D15xx.xx, 0dBm
As HD-TD-3GMX-2, with the addition of an optical
DWDM output based on a 0dBm module.
HD-TD-3GMX-2-D15xx.xx, 5.0dBm
As HD-TD-3GMX-2, with the addition of an optical
DWDM output based on a +5.0dBm module.
HD-TD-3GDX-2
2-output 3GHD-SDI to HD-SDI/SD-SDI de-multiplexer
with electrical input.
HD-TD-3GDX-2-R
2-output 3GHD-SDI to HD-SDI/SD-SDI de-multiplexer
with electrical input and a short haul optical receiver.
HD-TD-3GDX-2-R-L
2-output 3GHD-SDI to HD-SDI/SD-SDI de-multiplexer
with electrical input and a high sensitivity long haul
optical receiver.
1.1 Product versions
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HD-TD-3GMX-2 / HD-TD-3GDX-2 and SDI-TD-3GMX-5 / SDI-TD-3GDX-5 Rev. F
Number of inputs
2 independent HD-SDI/SD-SDI, 3 independent SD-SDI
Data rates
1485 Mbps / 270 Mbps
Equalization
Automatic up to 100 m Belden 1694A for SD/HD-SDI
Impedance
75 ohm
Return loss
HD/SD inputs: >15 dB upto 1485 MHz
SD only inputs: >15 dB upto 270 MHz
Connector
BNC
Output signal
3GHD-SDI according to SMPTE 425M Layer B, marked as
1080/30p
Data rate
2970 Mbps
Impedance
75 ohm
Return loss
>13 dB upto 1485 MHz, >10dB upto 2970MHz
Jitter (UI = Unit Interval)
Max. 0.2 UI
Peak to peak signal level
0.8 V ± 10%
Signal polarity
Non-inverting
Connector
BNC
Output signal
3GHD-SDI according to SMPTE 425M Layer B, marked as
1080/30p
HD/SD outputs: >15 dB upto 1485 MHz
SD only outputs: >15 dB upto 270 MHz
Jitter (UI = Unit Interval)
Max. 0.2 UI
Peak to peak signal level
0.8 V ± 10%
Signal polarity
Non-inverting
Connector
BNC
Temperature range
0 to +45 °C
Power consumption
+5 V / 4.5 W and +15 V /1.6 W
Control
RS-422, Multicon GYDA enabled, SNMP, DIP switch
control and LED status monitoring for manual use.
Electrical and optical delay
Less than 100 μs (combined through MUX and DMUX) In
addition comes 5 us/km of fiber signal propagation time
SMPTE 125M-1995
Component Video Signal 4:2:2 — Bit-Parallel Digital
Interface
SMPTE 259M
SDTV1 Digital Signal/Data - Serial Digital Interface
SMPTE274M-2008
1920 x 1080 Image Sample Structure, Digital representation
3 De-multiplexer specifications
Optical input
Electrical input
Electrical output
General
Latency
Supported standards for electrical and optical ports
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HD-TD-3GMX-2 / HD-TD-3GDX-2 and SDI-TD-3GMX-5 / SDI-TD-3GDX-5 Rev. F
and Digital Timing Reference Sequences for Multiple Picture
Rates
SMPTE 291M-2006
Ancillary data packet and space formatting
SMPTE 292-2008
1.5Gb/s signal/data serial interface
SMPTE 296m-2001
1280 × 720 Progressive Image Sample Structure - Analog
and Digital Representation and Analog Interface
SMPTE297-2006
Serial Digital Fiber Transmission System for SMPTE 259M,
SMPTE 344M, SMPTE 292 and SMPTE 424M Signals
SMPTE424m-2006
3Gb/s signal/data Serial interface
SMPTE425-2008
3GB/s Signal/Data, Serial Interface - Source Image Format
Mapping
SMPTE RP165
Error Detection Checkwords and Status Flags for Use in BitSerial Digital Interfaces for Television
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HD-TD-3GMX-2 / HD-TD-3GDX-2 and SDI-TD-3GMX-5 / SDI-TD-3GDX-5 Rev. F
EQ
HD/SD
input 1
EQ
Reclocker
Reclocker
Remapper
3G Frame
Generator
Remapper
3G Time
Division
Multiplexer
Optical Transmitter
HD-TD-3GMX-2
Microcontroller
Remote
Control
Electrical Transmitter
Optical
Fiber
3G El.
Transp. Out
3G Clock
HD/SD
input 2
3G Opt.
Transp. Out
3G Opt.
Transp.
In
Reclocker
HD/SD
3G Time
Division
Demultiplexer
Optical Receiver
HD-TD-3GDX-2
Microcontroller
Remote
Control
Electrical Receiver
Optical
Fiber
CLK
regen.
3G El.
Transp.
In
HD/SD
output 1
EQ
HD/SD
HD/SD gen.
HD/SD gen.
CLK
Regen.
HD/SD
output 2
4 Description
4.1 The HD-TD-3GMX-2 and HD-TD-3GDX-2
Figure 1: Logical building blocks for the HD-TD-3GMX-2(-T)
Figure 2: Logical building blocks for the HD-TD-3GDX-2(-R)
The HD-TD-3GMX-2 board embeds up to two independent HD or SD video streams in one
output 3G stream. After the two HD or SD streams have been remapped, to avoid synchword conflicts with the transport stream frame, they are embedded in a 2.97 Gbps (3GHD)
stream in a proprietary protocol which is still compliant to the SMPTE 424-2006 and
SMPTE 425-2006 Level B standards. In order to reduce latency, the streams are
embedded asynchronously to each other and to the transport stream. The combined
latency of the HD-TD-3GMX-2 and HD-TD-3GDX-2 boards is always well below 100µs.
If the two HD streams were fully synchronous when entering the HD-TD-3GMX board, they
can have individual phase shifts of several samples after being demultiplexed at the HDTD-3GDX-2 end, but the clock frequencies will be the same as soon as the system has
stabilized (after a few seconds).
After demultiplexing in the HD-TD-3GDX-2 board, the data structure that was remapped on
the sender side will be restored and the data rate (pixel clock) will also be restored to
exactly the same rate as it was received on the HD-TD-3GMX-2 board.
The 3G signal is seen and transported as a standard 3G-SDI Level B (1080/30p) video by
external equipment. No other format can be set at the sender side of the link and no other
format will be accepted at the receiver side of the link. An HD-TD-3GDX-2(-R) or an SDIHD-3GDX(-R) board is required to reconstruct the two HD signals from the 3GHD at the
receiving end.
Note that frame synchronization or switching of the 3G transport signal should
be avoided, as switching or repeated/deleted frames will cause severe signal
failures in the recovered streams at the receiving end of the link.
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HD-TD-3GMX-2 / HD-TD-3GDX-2 and SDI-TD-3GMX-5 / SDI-TD-3GDX-5 Rev. F
The HD-TD-3GMX-2 can receive any combination of two HD or SD video standards,
synchronous or asynchronous. The HD-TD-3GMX-2 embeds timing information that the
HD-TD-3DX-2 uses to regenerate the HD or SD signals with the same clock frequency as
the original inputs. The two signals are treated as two completely independent streams,
which means that there will be no cross-contamination of the other stream when one input
goes missing or has inherent errors.
The output from the HD-TD-3GMX-2 module is either electrical 3G-SDI according to the
SMPTE 425M standard, or if an optional laser module is added, simultaneous electrical and
optical 3GHD-SDI according to SMPTE 297-2006
If the customer has purchased an optional long haul or short haul receiver module for the
DMUX side (in which case the DMUX module will have an “R-L” or “-R” appended to its
name), there will be an option available to select either input manually, or to select between
them automatically.
4.2 The SDI-TD-3GMX-5 and SDI-TD-3GDX-5
The SDI-TD-3GMX-5 has two distinct modes of operation, set by the user: Either the same
two-input mode described above for the HD-TD-3GMX-2 / HD-TD-3GDX-2, or a mode with
up to five inputs, where only the first one can be HD-SDI. The latter mode is really the same
as the first, but with the addition of a 4xSD-to-1xHD software module from the SDI-TDMUX-4. This means that the HD stream normally coming straight from input 2, will now be
replaced with a multiplex of four SD-SDI inputs. This in turn means that input 2 can only
handle SD-SDI input signals in this mode, not HD-SDI. The user selection of the two modes
will prevent the possibility of overflowing the 3GHD-SDI carrier stream.
On the de-multiplexer side of the 3G transport link, the card will be able to read control
words embedded in the transport signal to determine which mode it should operate in. No
user control is necessary on the de-multiplexer side. The SDI-TD-3GDX-5 fully supports
input from both the SDI-TD-3GMX-5 and the HD-TD-3GMX-2, whereas the HD-TD-3GDX-2
will only be able to recover the signals for outputs 1 and 2 if fed a signal from an SDI-HD3GMX-5.
4.3 HD ancillary data limitations
Because the total usable transport bandwidth in the 3G output of the multiplexer is slightly
less than that of two full HD streams, a small number of samples must be dropped from the
incoming horizontal blanking intervals. The active picture will never be affected.
The number of samples dropped varies depending on the HD format as shown in Table 1.
Samples will be removed from the tail end of the HANC, following a left-alignment of all
valid packets. Given typical HANC payload size, such as required to carry AES audio, the
sample deletion will have no impact as it will occur entirely in unused samples.
In the case of an unusually full HANC, such that sample deletion would result in a
fragmented HANC packet, the remaining fragment will be deleted to maintain SMPTE
compliance.
HANC data that are not contained within a valid SMPTE 291M packet are not guaranteed to
be transported, and may appear as null or ’black’ values when de-multiplexed.
There are no limitations to the active video area portion of the HD signal to be
transferred – this will always be restored to its original content at the receiving
end of the link, as long as it is a valid video signal according to applicable
SMPTE standards.
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HD-TD-3GMX-2 / HD-TD-3GDX-2 and SDI-TD-3GMX-5 / SDI-TD-3GDX-5 Rev. F
1280x720/30 (1:1)
1280x720/30 (1:1) EM
1280x720/50 (1:1)
1280x720/50 (1:1) EM
1280x720/25 (1:1)
1280x720/25 (1:1) EM
1280x720/24 (1:1)
1280x720/24 (1:1) EM
1280x720/60 (1:1)
1280x720/60 (1:1) EM