Albalá Ingenieros ISW3000C01 User manual
ISW3000C01
DVB-ASI AND DVB-IP AUTOMATIC CHANGE-OVER SWITCH WITH
ADVANCED TS FAILURE DETECTION FUNCTIONS
Version 1.0
Albalá Ingenieros, S.A.
Medea, 4 - 28037 Madrid - Spain
06 October 2016 - © Albalá Ingenieros S.A. - All rights reserved
ISW3000C01
ISW3000C01
DVB-ASI AND DVB-IP AUTOMATIC CHANGE-OVER SWITCH WITH ADVANCED TS
FAILURE DETECTION FUNCTIONS
Version 1.0
1. DESCRIPTION ...................................................................................................................... 5
1.1. The ISW3000C01 ............................................................................................................................ 5
1.2. Features ............................................................................................................................................. 8
1.3. Block diagram .................................................................................................................................. 9
2. SPECIFICATIONS ............................................................................................................... 11
3. INSTALLATION .................................................................................................................. 13
3.1. Initial inspection .......................................................................................................................... 13
3.2. Safety instructions ...................................................................................................................... 13
3.3. Environmental considerations ................................................................................................ 14
3.4. Power considerations ................................................................................................................. 14
3.5. Installing the module in the mounting frame ................................................................... 14
3.6. Interconnection ............................................................................................................................ 16
3.6.1. Electrical DVB-ASI video connections .......................................................................... 17
3.6.2. GPI connections ................................................................................................................... 18
3.6.3. GPO connections ................................................................................................................. 18
4. OPERATION ...................................................................................................................... 19
4.1. Front panel description .............................................................................................................. 19
4.2. Configuration from the front panel ...................................................................................... 21
4.3. Functional description ............................................................................................................... 21
4.3.1. Operation in automatic mode ........................................................................................ 21
4.3.2. Operation in semi-automatic mode ............................................................................. 22
4.3.3. Operation in manual mode ............................................................................................. 22
4.4. Description of the TS over IP encapsulators/de-encapsulators ................................... 23
4.5. System latencies .......................................................................................................................... 23
4.6. Redundant IP transmitter mode ............................................................................................. 26
4.7. Module remote control and supervision ............................................................................. 28
4.7.1. Details of the ISW3000C01 registers ........................................................................... 29
5. GLOSSARY ........................................................................................................................ 45
6. REGULATIONS .................................................................................................................. 47
7. VERSIONS ......................................................................................................................... 49
ISW3000C01
Albalá Ingenieros | Manual ISW3000C01
1. DESCRIPTION
1.1. The ISW3000C01
The ISW3000C01 module is an automated switch for DVB-ASI and DVB-over-IP streams
that operates based upon the presence of signal at its inputs, the status of a diverse set
of parameters of the input streams and the information received via a GPI, all based
upon the priorities that the user assigns to each input.
The device provides two inputs, MAIN IN and RES IN through which two DVB-ASI streams
are received, labeled ASI MAIN and ASI RES. The module also has a 1Gbit/s Ethernet port
via which it can receive two more DVB-over-IP streams (UDP and RTP, with and without
FEC). These are labeled IP MAIN and IP RES.
The unit includes two processing channels known as TS1 and TS2 for simultaneous
analysis of two of the four input streams available, and one of these can be selected for
delivery to the output.
The Transport Stream (TS) selected for delivery to the output at any given time is
distributed to four DVB-ASI outputs and can also be transmitted via IP using the
Ethernet interface. In case of a power supply failure or extraction of the main board of
the module from its mounting frame the rear board performs a bypass from the ASI
MAIN input (MAIN IN) to one of the outputs (OUTp).
The ISW3000C01 module can function in three different operating modes depending on
the type of signal received. One mode is valid for any DVB TS, another mode can only be
used with DVB-T type transport streams and the third mode is only for use with DVB-T2
type transport streams. The characteristics of each operating mode are described in the
following:
• Generic DVB mode:
- Allows both seamless and non-seamless operation.
-Error detection can activate for any of the parameters indicated in ETSI TR 101 290
V1.2.1 as a First Priority, which are the following:
- TS_sync_loss. Loss of synchronization.
- Sync_byte_error. Sync_byte not equal 0x47.
- PAT_error. Errors that prevent the PAT from being obtained.
- Continuity_count_error. Errors in the packet continuity counter.
- PMT error. Errors that prevent the PMT from being obtained.
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Albalá Ingenieros | Manual ISW3000C01
- PID_error. Referred PID does not occur for a user specified period.
-The 1 pulse-per-second (1 PPS) and 10MHz reference inputs are not used in this
mode.
- Provides a buffer of 45000 packets that allows the module to act as a TS line delay.
• Dedicated DVB-T mode:
- Seamless-only operation.
-Error detection occurs according to all the parameters indicated in Generic DVB mode
and according to the presence of a megaframe sync (MIP packets).
-The 1 PPS reference input is used to measure the delay between the input signals and
to provide a reference delay for the output signal.
-The output delay is set by the user and is independent of the delay from the input
signals. The output delay must be greater than the input delay in order for the
module to operate properly.
-Each input includes a 45000 packet buffer, allowing a delay of up to one second for
any TS up to 60Mbit/s.
• Dedicated DVB-T2 mode:
- Seamless-only operation.
-Error detection occurs according to all the parameters indicated in Generic DVB mode
and according to the presence of a superframe sync (Timestamps packets).
-The 1 PPS reference input is used to measure the advance in time that the input
signals arrive in with respect to the transmission time of the superframe and also for
referencing the delay of the output signal. The module allows two functional modes:
relative to the PPS signal or absolute within the DVB-T2 time epoch. In this second
mode the timing reference can be taken from the rear bus of the mounting frame or
from the 1 PPS signal itself if it provides that information. For both cases an GPS
receiver from Albalá Ingenieros is required.
-The output delay is set by the user and is independent of the delays with which the
input signals are received. The output delay must also be greater than the greatest
input delay for proper operation.
-Each input provides a buffer of 45000 packets that allows them to delay any TS of up
to 60Mbit/s by up to one second.
In order to perform seamless switching for DVB-T and DVB-T2 frames the ISW3000C01
includes a 1 PPS reference input and a 10MHz reference input for synchronization of
different transport streams. The module also includes GPI inputs to flag external errors
within the transport streams received and a GPO output to signal that the unit cannot
deliver a valid TS at the outputs.
In addition to functioning as an automatic switch, the ISW3000C01 can be used for
other functions such as conversion of DVB-ASI transport streams to DVB over IP and vice
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Albalá Ingenieros | Manual ISW3000C01
versa, elimination of jitter in the transport streams being transmitted over IP and the
conversion of IP protocols such as elimination or insertion of forward error correction
(FEC), conversion from UTP to RTP, etc.
The module provides three switching modes: automatic, semi-automatic or manual. All
changes to the input selected or in the status of the inputs are indicated via the front
panel LEDs and a beep.
It is possible to monitor the ISW3000C01 status remotely using a communications
controller module installed in the same mounting frame. In addition, certain controller
modules provide SNMP management and the ability to record events in a file including
date and time information for further analysis.
The ISW3000C01 is a TL3000 terminal line module and can be housed in a three rack
unit (3 RU) UR3000 mounting frame or a 1 RU UR3100 mounting frame.
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Albalá Ingenieros | Manual ISW3000C01
1.2. Features
•Automatic change-over switch for DVB Transport Stream signals with seamless
switching capabilities.
•Provides four outputs: two DVB-ASI and two DVB over IP (UDP and RTP with and
without FEC) and two analysis channels.
• Switches between the two Transport Streams that are being analyzed.
•Provides a DVB Transport Stream output distributed to four DVB-ASI BNC connectors
and to the Ethernet interface (DVB over IP).
•The error criteria for the input channels that can be selected are defined in the First
Priority table of ETSI TR 101 290 V1.2.1 together with the presence of a megaframe sync
signal in DVB-T mode or the superframe sync signal in DVB-T2 mode.
• Provides three modes of operation: Automatic, Semiautomatic and Manual.
•The main DVB-ASI input is bypassed to one of the output connectors in case of power
loss or module removal.
• The DVB-ASI inputs include automatic equalizers.
• Provides the following front panel indicators:
- Failures in the Transport Stream inputs, the 1 PPS input and the 10MHz input.
- Ethernet interface status.
- Operating mode.
- Selected input.
- Seamless switching capacity.
-Changes in the failure status of the inputs or changes in the selected input that can
also be acoustic.
•Module control and supervision can be done remotely when the mounting frame is
equipped with a communications controller module.
•One UR3000 mounting frame can house up to 12 ISW3000C01 modules. If power
supply redundancy is required and FA3000 or FA3001 modules are used then only 10
modules can be housed in the mounting frame. If PSU3300 or PSU3301 modules are
used for this purpose then up to 12 modules can be installed.
• One UR3100 mounting frame can house up to three ISW3000C01 modules.
• Low power.
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Albalá Ingenieros | Manual ISW3000C01
1.3. Block diagram
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Albalá Ingenieros | Manual ISW3000C01
ISW3000C01
10
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