ASI • GPSI • GP/PL • LBND • ASPT • GPPC • LBPC

Interface Cards

Grundpreis­spanne

-

Weitere Informationen:

Online lesen:

Features & Benefits

  • ASI For Use as Interface on AD95x-II Analyzers and AD991 MPEG Signal Source
    • Allows Connection to Equipment with the Divicom M2S Interface and Provides Burst Mode Packet Transmission
    • Interface Specification Fully Compliant with DVB A010 ASI-C Interface Specification
    • Built-in Self Test Data Sequences (BIST) Can Also Confidence-check External Cable and Equipment Paths (loopthrough)
    • Two versions available to support either ISA or PCI motherboard machines
    • PCI version supports packet timestamping for offline PCR jitter analysis when used with AD95x-II
  • L-Band Input Interface Used on AD95x-II Analyzers for Direct Connection to RF Satellite Feeds
    • Monitor Off Air QPSK Modulated Signals From 1 to 45 Msymbol/s
    • Two versions available to support either ISA or PCI motherboard machines
  • General Purpose Serial Interface (GPSI) for use with AD95x-II Analyzer and AD991 MPEG Signal Source
    • SMPTE 310M Synchronous Serial Interface
    • ECL Serial DC and AC
    • DHEI
    • RS422/RS485
    • Synchronous Serial Interface
    • Two versions available to support either ISA or PCI motherboard machines

ASI

Designed for product developers, program providers and broadcasters AD95x-II and AD991 have the ability to interface to MPEG-2 compressed digital video data streams directly from high-speed serial interfaces.

The Asynchronous Serial Interface adapter (ASI) greatly simplifies interconnection to digital video systems and allows direct interconnection with third party equipment.

Functionality

The ASI adapter consists of a daughter card PCB for the AD95x-II and AD991 main MPEG processing card.

The ASI contains the processing electronics to allow a digital video transport stream to be fed at baseband directly to the MPEG processing system.

An ASI interconnect physically consists of two nodes: a transmitting node and a receiving node. This unidirectional copper coaxial cable carrying data from the transmitting node to the receiving node is referred to as a link. The link is used by the interconnected ports to perform communication. It is a point-to-point link system. Physical equipment such as video or audio compressors, multiplexers, modulators, etc., can be interconnected through these links. The PCI version of this card has the capability to timestamp packets as they arrive at the interface. This can then be used for offline analysis of PCR timing characteristics such as PCR overall jitter, PCR frequency offset and PCR drift rate when used in the AD95x-II family of MPEG Test Systems.

Configuration

Once the ASI adapter is fitted, the AD95x-II will automatically detect the card on power-up. The Asynchronous Serial Interface settings may then be configured from both the Player and Monitor/Recorder programs.

The clock can be set to calculate the playout clock rate from the PCR Fields in the playout file or the clock rate to be entered directly as either the Bit Rate or Byte Rate frequency.

The ASI Adapter Has Four Optional Mode Settings:
  • ASI - The operating mode of the standard ASI
  • ASI Burst - Data is transmitted in bursts of 1, 2, 3 or 4 transport stream packets. The number of packets in each burst is specified in the Packets field
  • ASI Forced Error - Causes an error byte to be transmitted in position 15 of each packet
  • M2S - Selects Divicom M2S compatible mode
Self-test

This adapter card has a Built-in Self Test (BIST) function that can be used to troubleshoot the ASI interface and any connected serial link components.

It can be set to generate a special Pseudo Random Binary Stream (PRBS) test sequence and report the error rate detected.

Thumbnail

GPSI Interface Card.

GPSI

Designed for product developers, program providers and broadcasters, the AD95x-II and AD991 now have the ability to interface to MPEG-2 compressed digital video data streams directly from high-speed serial interfaces.

This greatly simplifies interconnection to digital video systems and allows direct interconnection with third party equipment via Tektronix' General Purpose Serial Interface (GPSI).

Functionality

The GPSI consists of a daughter card PCB for the AD991, AD95x-II, and AD991 main MPEG processing card. The GPSI contains the processing electronics to allow a digital video transport stream to be fed at baseband directly to the MPEG processing system. It is able to internally recover or generate the clock signal on bi-phase interfaces with on-board PLL and LSI logic. High precision clock references support 8-VSB and 16-VSB bit rates.

Configuration

The GPSI is selected via the AD95x-II and AD991 user interface with the facility to select various clock sources, bit rates and other settings.

Thumbnail

L-Band Interface Card.

L-Band

Designed for product developers, program providers and broadcasters, the AD95x-II now has the ability to monitor, record and analyze DVB and ATSC data streams directly from the RF L-Band.

This greatly simplifies interconnection of ATSC/DVB/MPEG systems and allows off air monitoring direct from satellite feeds and before upconversion at transmission stations.

Functionality

The L-Band interface consists of a daughter card PCB for the AD95x-II main MPEG processing card. The L-Band interface contains a QPSK demodulator and the processing electronics to allow an MPEG transport stream to be fed at baseband directly to the AD95x-II DVB/MPEG processing system.

Configuration

The user inputs a set of parameters: Satellite frequency; LO frequency; symbol rate; Viterbi ratio; DC power/Polarization (off/13 V/18 V); 22 kHz tone switching. A set of preconfigured channels can be stored allowing the user to switch conveniently between them.

Bit Error Measurement

The L-Band interface card measures the post-Viterbi Bit Error Rate (BER).

Characteristics

ASI

The Asynchronous Serial Interface (ASI) adapter allows connection to equipment with an interface compliant with the DVB Asynchronous Serial Interface as defined in DVB document A010 (Interfaces for CATV/SMATV Headends and Similar professional equipment).

The ASI also allows connection to equipment with the Divicom M2S interface and provides burst mode packet transmission.

ASI uses a fixed rate data stream operating at 270 Mb/s. The ASI adapter allows either playout, monitoring or recording of transport streams. Simultaneous playout and recording are not possible. When recording or monitoring, the incoming data is looped through to the ASI output.

Data Rate - Any transport stream rate up to 90 Mb/s.

Transmission Rate - 270 Mb/s.

Output Signal Level - 800 mVp-p ±10% into 75 Ω.

Output Impedance - 75 Ω ±5%.

Output is Transformer Coupled - i.e. DC blocked.

Output Signal Jitter - Less than ±10%.

Maximum Input Signal Is - 2 Vp-p.

Minimum Input Signal Is - 200 mVp-p.

Input Impedance - 75 Ω ±5%.

Maximum DC Voltage Allowed On Input (cable inner or cable outer) - 0 V dc (w.r.t. chassis).

Connectors and Cables - High quality 75 Ω BNC connectors and double shielded cable should be used to give a practical operating range of several hundred meters.

Note: To meet system EMC/CE emission regulations the ASI BNC connector screens have to be electrically connected to the AD95x-II chassis. The ASI cable must therefore not be directly connected to equipment with a potentially different chassis voltage such as apparatus in a different building or to apparatus connected to an electrical supply originating from a different phase.

The applicable EMC specs are detailed in the AD95x-II data sheet.

GPSI

The GPSI receives 188, 204 and 208 byte transport stream packet formats and strips off the FEC to leave 188 bytes for use by AD95x-II and AD991. It transmits inserting dummy Reed Solomon (204 bytes or 208 bytes). SSI & SMPTE 310M can recover clock and data in the range 1 to 44 MHz.

ATSC

SMPTE 310M Synchronous Serial Interface - Two BNC connectors are provided for the signal input and output.

Transmit bit rates from 1 Mb/s to 44 Mb/s are supported with special high precision support for the ATSC 8-VSB (19,392,658.46 Mb/s) and 16-VSB rates (38,785,316.92 Mb/s).

AD95x-II - Receive bit rates from 1 Mb/s up to 44 Mb/s with automatic clock recovery are supported with special support for ATSC 8-VSB (19.392,658.46 Mb/s). Higher receive rates up to 44 Mb/s can be achieved using an additional external clock input.

AD991 - In AD991 the only frequency supported is 8-VSB.

ECL-AC (AD95x-II) and ECL-DC (AD95x-II) - Provides data and clock inputs and outputs at ECL levels with NRZ coding (ECL/ AC as defined for the Harris CD 1 ATV Exciter.)The physical connection is provided on a 26-way D-type connector.

Transmit and receive bit rates from 1 Mb/s up to 50 Mb/s are supported with special high precision support for the ATSC 8-VSB (19,392,658.46 Mb/s) and 16-VSB rates (38,785,316.92 Mb/s), also provided is psync bit at the first bit position for each packet.

DHEI - (Digital Headend Expansion Interface) - This is a General Instrument proprietary interface. It is a serial, differential ECL interface that has gapped packet clock, data and sync.

Data rate is to 48 Mb/s.

DVB

RS422/485 Interface - (AD95x-II) - Provides data and clock inputs and outputs at RS422/485 levels with NRZ coding.The physical connection is provided on a 26-way D-type connector.

Transmit and receive bit rates from 1 Mb/s to 40 Mb/s are supported.Cable length is limited to 2 m for bit rates above 20 Mb/s.

Synchronous Serial Interface (SSI) - (AD95x-II) - Two BNC connectors are provided for the signal input and output.

Transmit bit rates from 1 Mb/s to 44 Mb/s are supported with special high precision support for the ATSC 8-VSB (19,392,658.46 Mb/s) and 16-VSB rates (38,785,316.92 Mb/s).

Receive bit rates from 1 Mb/s up to 44 Mb/s are supported with automatic clock recovery.

Other Features - Input and output signal configuration is fully flexible and under software control.The GPSI card is a single channel card, but the input signal loops through to the output on the same card.

The GPSI card can be customized to receive and transmit higher data rates to suit a wide range of applications.

L-Band

DVB Specification - DVB-S to EN 300 421.

Demodulation - QPSK.

Input Impedance - 75 Ω nominal.

Reverse Loss Ratio (RLR) - Better than -7 dB (-10 dB typical).

Input Connector - F Type.

Input Level Range for Full Performance - -60 to -30 dBm.

Maximum Operational Input Level - -20 dBm.

Maximum DC Level at Input - +25 V.

Minimum Input Frequency - 950 MHz.

Maximum Input Frequency - 2150 MHz.

Tuning Increment - 125 kHz.

Carrier Acquisition Range - ±10% of symbol rate.

Minimum Symbol Rate - 1 Msymbol/s.

Maximum Symbol Rate - 45 Msymbol/s.

Symbol Rate Increment - 1 ksymbol/s.

Symbol Rate Acquisition Range - ±240 ppm from nominal value.

Irreducible BER - Better than 1 x10-6 before FEC.

Viterbi Rates - 1/2, 2/3, 3/4, 5/6, 7/8 programmable.

Spectral Inversion - Automatic support.

Reed Solomon - DVB-S standard (204, 188, T=8).

LNB DC Power Supply - 0 V, +13 V or +18 V (±1 volt).

Tone Switching - 22 kHz ±20%.

Loop-through Output Level - Input level ±3 dB.

Loop-through Output Impedance - 75 Ω nominal.

Loop-through Connector - F Type.

Note: At low symbol rates care is needed to ensure that the carrier frequency and symbol rate configured by the user accurately match the actual (rather than nominal) values of these parameters subject to the acquisition tolerances mentioned above.

Last Modified:
Downloads
Download

Laden Sie Handbücher, Datenblätter, Software und vieles mehr herunter:

Go to top