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Rohde & Schwarz – FMA 50 kHz – 1360 MHz Modulation analyzer

Rohde & Schwarz – FMA 50 kHz – 1360 MHz Modulation analyzer

Description

The Rohde & Schwarz Modulation Analyzers FMA provide fast and high-precision analysis of all parameters of a modulated signal. Thanks to their versatility they can also be used as RF counters, power meters, voltmeters, psophometers and distortion meters. Modulation Analysis with High Precision. the FMA operates from 50 kHz to 1360 MHz but can be retrofitted to 5.2GHz. These frequencies are becoming increasingly important for new radio services and special outside-broadcasting links. Radiotelephony and calibration of signal generators are further applications of this analyzer. Their unrivalled measuring accuracy warranties reliable values. The low inherent spurious modulation and the psophometer function using the optional CCIR and CCITT filters facilitate measurements and the development of oscillators, transmitters, transposers and receivers. Characteristics . Frequency range 50 kHz to 1.36 GHz (5.2 GHz for FMB) . High measurement speed . Excellent S/N ratio even at high carrier frequencies . RF frequency measurement with 10-digit readout . Extremely accurate AM, FM and oM measurements over a wide modulation frequency range . AF frequency measurement with 5-digit readout . Distortion measurement down to 0.005%, continuous in the range 10 Hz to 100 kHz (optional) . Universal filter capabilities, psophometric weighting filters . AC/DC measurement of AF voltage
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Brief Description

  • The R&S®FMAx modulation analyzers combine the functionalities of several measuring instruments in a single box (RF counter, power meter, voltmeter, audio analyzer, distortion meter, FM stereo decoder). The R&S®FMAx modulation analyzers are suitable for measurements in the field of broadcasting (e.g. on AM and FM transmitters) and radiotelephony as well as in the calibration of signal generators.

    The traditional analog techniques of amplitude, frequency and phase modulation retain their important position in all branches of communication despite the increasing use of digital modulation. The concept of the FMx family – modulation analysis for today’s requirements – calls for measurement performance weIl beyond that of conventional modulation meters. The predecessor FAM from Rohde&Schwarz was a step in the right direction. Through the innovative FMx family with its range of application-specific models, this development has reached a new peak. The goals of this new design were:

    • improved accuracy of all measurements
    • higher measurement rates
    • improved processing and presentation of the results
    • optimization of the model range from the application point of view and
    • retention of the basic concepts of the predecessor family FAM.

    A standardized interface (the IEEE-488 bus) for applications in automatic test systems was just as important as a weIl-defined family of instruments for applications in stationary and mobile radiocommunication, in sound and TV broadcasting and in many navigation systems. Measurements on FM stereo signals are a major area of interest. Beyond the classic parameters such as modulation depth, deviation and carrier frequency, comprehensive analysis of the interfering modulation and the baseband source signal is provided for. Among the many other tests catered for are precise measurements of the carrier power and the transient behaviour of the RF carrier.

Key Facts

  • AM, FM, φM demodulation
  • Fast, automatic frequency adjustment by direct frequency measurement
  • Low-noise synthesizer for outstanding stereo S/N performance
  • Separate +PK and –PK detectors with extremely short response time
  • True RMS detector
  • Extremely high modulation measurement accuracy
  • High-precision power measurement (typ. error < 0.5 dB)
  • Stereo decoder
  • Audio generator for single and dual tones, stereo MPX

Features & Benefits

    • AM, FM, PM demodulation
    • Fast, automatic frequency adjustment by direct frequency measurement
    • Low-noise synthesizer with high frequency resolution
    • Separate +PK and -PK detectors with extremely short response time
    • True RMS detector
    • Extremely high accuracy
    • High-precision power measurement (typ. error of FMA <0.5 dB, even smaller for FMB)

     

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