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Digital Cable TV X-Series Measurement Application N6152A & W6152A

Technical Overviews

Digital Cable TV Measurement Application

  •  Measure digital cable TV RF transmitter, modulator, tuner, or amplifier performance
  •  Easy-to-use, standard-based preset settings
  •  One-button tests with pass/fail limit per J.83/A (DVB-C), J.83/B (DOCSIS DS), and J.83/C (ISDB-C) standards
  •  Hardkey/softkey manual user interface or SCPI remote control
  •  Built-in, context-sensitive help
  •  Transportable license between X-Series signal analyzers

The Keysight Technologies, Inc. N/W6152A provides one-button, standard-based power and modulation analysis capabilities to help your design, evaluation, and manufacturing of digital cable TV modulators, transmitters, amplifiers, and tuners.

With the optional analog baseband IQ inputs in the PXA or MXA signal analyzer, it can also provide the flexibility of measuring signal quality and modulation accuracy with RF input or analog IQ input.

The N/W6152A measurement application is just one in a common library of more than 25 advanced measurement applications in the Keysight X-Series. The Keysight X-Series is an evolutionary approach to signal analysis that spans instrumentation, measurements, and software.

The X-Series analyzers, with upgradeable CPU, memory, disk drives, and I/O ports, enable you to keep your test assets current and extend instrument longevity.

Proven algorithms, 100% code-compatibility, and a common UI across the X-Series create a consistent measurement framework for signal analysis that ensures repeatable results and measurement integrity so you can leverage your test system software through all phases of product development.

In addition to fixed, perpetual licenses for our X-Series measurement applications, we also offer transportable licenses which can increase the value of your investment by allowing to you transport the application to multiple X-Series analyzers.

Key parameter setup

  • – Radio standards: DVB-C (J.83/A), J.83/B, and J.83/C
  •  Symbol rate with standard default and settable by users
  •  Modulation: 16/32/64/128/256QAM for DVB-C and J.83/C and 64/256/1024QAM for J.83/B
  •  Adaptive equalizer with filter length and convergence settings
  •  Advanced settings: Meas interval, low SNR enhancement, out-of-band filter, and more.
  •  Input: RF or analog IQ (only available in the N9030A PXA or N9020A MXA) for signal quality and modulation accuracy measurements

Digital Cable TV Standards Overview

The digital cable TV measurement application includes three standards of digital video broadcasting over cable: DVB-C (J.83 Annex A), J.83 Annex B, and J.83 Annex C.

DVB-C (J.83 Annex A)

DVB-C is the DVB European consortium standard for the broadcast transmission of digital television over cable, mainly used in Europe and Asia with 8 MHz bandwidth.

J.83 Annex B (DOCSIS DS)

J.83/B, widely used in North America as digital television over cable and the same as the DOCSIS DS physical layer, has a greater difference in FEC coding and occupies a bandwidth of 6 MHz.

J.83 Annex C (ISDB-C)

J.83/C, mainly used in Japan as digital television over cable and also called ISDB-C, has identical structure as DVB-C, except for the channel bandwidth (6 MHz for J.83/C and 8 MHz for DVB-C) and roll-off factor of the baseband filter.

Standard-based RF transmitter tests

The RF transmitter test requirements for DVB-C is defined in the ETSI TR 101 290 standard. Table 2 shows the required base station RF transmitter tests along with the corresponding measurement applications.

Measurement details

All of the RF transmitter measurements as defined by the digital cable TV standard, as well as a wide range of additional measurements and analysis tools, are available with a press of a button. These measurements are fully remote controllable via the IEC/IEEE bus or LAN using SCPI commands.

Analog baseband measurements are available on the PXA or MXA signal analyzer equipped with BBIQ hardware supported baseband measurements include all of the modulation quality plus I/Q waveform measurements.

Key Specifications

Definitions

  •  95th percentile values indicate the breadth of the population (≈2σ) of performance tolerances expected to be met in 95% of cases with a 95% confidence.
  •  Typical values are designated with the abbreviation "typ." These are performance beyond specification that 80% of the units exhibit with a 95% confidence.
  •  Nominal values are designated with the abbreviation "nom." These values indicate expected performance, or describe product performance that is useful in the application of the product.
  •  PXA specifications apply to analyzers with frequency options of 526 and lower. For analyzers with higher frequency options, specifications are not warranted but performance will nominally be close to that shown in this section.

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