Keysight (Agilent) Technologies N6156A RF Spectrum Analyzers


DTMB (CTTB) Measurement Application

DTMB Measurement Application
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The DTMB (CTTB) measurement application is one of more than 25 measurement applications in the Agilent X-Series, an evolutionary approach to signal analysis that spans instrumentation, measurements, and software, transforming the X-Series signal analyzers into standards-based transmitter testers. The DTMB (CTTB) application provides fast, one-button standards-based power and modulation analysis capabilities to help your design, evaluation, and manufacturing of DTMB (CTTB) modulators, transmitters, amplifiers, tuners, and gap-fillers/repeaters. Using the optional analog baseband IQ inputs in the MXA signal analyzer, the DTMB (CTTB) application provides the flexibility to measure signal quality and modulation accuracy with RF input or analog IQ input.

RF Transmitters, Modulators, and Components Testing

  • One-button measurement helps improves speed with standard presets
  • Multiple modulation quality measurements help test the DUT’s full performance
  • Advanced settings help R&D engineers with troubleshooting
  • Remote SCPI commands increase the manufacturing test efficiency

Key Specification

Signal Analysis

  • Supports DTMB (CTTB) standard of both multi-carrier (C=3780) and single-carrier (C=1) modes
  • Transmitter RF measurement, analog baseband measurements with PXA BBIQ or MXA BBIQ hardware
  • One-button measurements with pass/fail per the standard
  • Runs inside PXA, MXA, and EXA signal analyzers


  • Power measurement: channel power, shoulder attenuation, ACP, CCDF, SEM
  • Modulation accuracy measurement: constellation, MER/EVM (MER RMS/peak, MER by subcarriers, MER by data, system information, and header), frequency error, amplitude error, phase error, quadrature error, amplitude imbalance
  • Channel frequency response, channel impulse response, and spectral flatness
  • Manual settings of DTMB (CTTB) signal; provides advanced settings like equalization switch, demodulation frames, PN phase change, SI reference, out-of-band filtering, and clock rate

Performance (Hardware Dependent)

  • Power accuracy: up to ±0.19 dB (95th percentile)
  • Shoulder attenuation dynamic range: up to 98.4 dB (103.7 dB typical)
  • MER floor: up to 51 dB (C = 3780, PN420, and 16QAM with EQ off)
  • Analysis bandwidth: PXA up to 140 MHz; MXA/EXA up to 40 MHz

Other Features

  • License key upgradable
  • Transportable license
  • SCPI remote user interface
  • Free trial license, try it for 14 days

N6156A OPTIONS (3)
EDEL-ONLY-01 License certificate delivery - email only
N6156A-2FP DTMB (CTTB) measurement application, fixed perpetual license
N6156A-2TP DTMB (CTTB) measurement application, transportable perpetual license
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