Keysight X-Series Measurement Manual
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Keysight X-Series Measurement Manual

Signal analyzer
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Keysight X-Series
Signal Analyzer
This manual provides documentation for the following
Analyzers:
N9040B UXA
N9030B PXA
N9020B MXA
N9010B EXA
N9000B CXA
N9063C
Analog Demod
Measurement
Application
Measurement Guide

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  • Page 1 Keysight X-Series Signal Analyzer This manual provides documentation for the following Analyzers: N9040B UXA N9030B PXA N9020B MXA N9010B EXA N9000B CXA N9063C Analog Demod Measurement Application Measurement Guide...
  • Page 2 PERFORMANCE OF THIS to the public to use, modify, DOCUMENT OR ANY INFORMATION reproduce, release, perform, CONTAINED HEREIN. SHOULD display, or disclose commercial KEYSIGHT AND THE USER HAVE A computer software or SEPARATE WRITTEN AGREEMENT commercial computer software WITH WARRANTY TERMS...
  • Page 3 To receive the latest updates by email, subscribe to Keysight Email Updates at the following URL: http://www.keysight.com/find/MyKeysight Information on preventing instrument damage can be found at: www.keysight.com/find/PreventingInstrumentRepair Is your product software up-to-date? Periodically, Keysight releases software updates to fix known defects and incorporate product enhancements. To search for software updates for your product, go to the Keysight Technical Support website at: http://www.keysight.com/find/techsupport...

  • Page 5: Table Of Contents

    Contents Table of Contents 1. Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Setting Up and Making a Measurement ......... . 8 Making the Initial Signal Connection.
  • Page 6 Contents Keysight N9063C Analog Demod Measurement Guide...

  • Page 7: Demodulating Am, Fm, Φm, Fm Stereo/Rds Signals

    Keysight X-Series Signal Analyzer N9063C Analog Demod Measurement Application Measurement Guide Demodulating AM, FM, ΦM, FM Stereo/RDS Signals The Analog Demod measurement application provides the capability of demodulating AM (amplitude modulated), FM (frequency modulated), ΦM (phase modulated), and FM Stereo/RDS (Radio Data System) signals. These...

  • Page 8: Setting Up And Making A Measurement

    To preset the parameters that are specific to an active, selected measurement, press Meas Setup, Meas Preset. This returns all the measurement setup parameters to the factory defaults, but only for the currently selected measurement. Keysight N9063C Analog Demod Measurement Guide...

  • Page 9: Demodulating An Am Signal

    AM signal. 4. Adjust the sweep time and Sweep — Press view the measurement This is the default setting. Demod Wfm Sweep — Press results as in the figure Time 2 ms and enter below. Keysight N9063C Analog Demod Measurement Guide...
  • Page 10 Demodulating an AM Signal Step Action Notes Meas Setup 5. Listen to the demodulated — Press AM signal. Ad vanced Tab Demod to Speaker — Toggle You may need to adjust the volume as necessary. Keysight N9063C Analog Demod Measurement Guide...

  • Page 11: Demodulating An Fm Signal

    FM signal. Sweep Demod Wfm 5. Adjust the sweep time and This is the default setting. — Press view the measurement Sweep Time result as in the figure below. Keysight N9063C Analog Demod Measurement Guide...
  • Page 12 Demodulating an FM Signal Step Action Notes Meas Setup 6. Listen to the demodulated You may need to adjust the volume as — Press FM signal. necessary. Ad vanced Tab Demod to Speaker — Toggle Keysight N9063C Analog Demod Measurement Guide...

  • Page 13: Demodulating An Fm Stereo/Rds Signal

    X axis in AF Spectrum window in AF Stop Freq — Press , 65, MPX, Mono, Stereo, Left, and Right views. Meas Setup 5. Set the FM reference — Press deviation. Ad vanced Ref Deviation Keysight N9063C Analog Demod Measurement Guide...
  • Page 14 — AF Spectrum window (bottom left) displays the modulating signal in frequency domain. — Metric window (bottom right) displays the numeric measurement results. Display View, Mono 7. View the mono part of the — Press multiplexed signal which corresponds to L+R. Keysight N9063C Analog Demod Measurement Guide...
  • Page 15 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes 8. View the stereo part of the Display View, Stereo — Press multiplexed signal which corresponds to L-R. Keysight N9063C Analog Demod Measurement Guide...
  • Page 16 12. View measurement results The audio in the test signal is an L-only — Press of the right channel. tone, so in the results of the right channel, the demod waveform is almost zero. Keysight N9063C Analog Demod Measurement Guide...
  • Page 17 The figure below displays the BLER result and the information bits in the upper part and key RDS messages like basic tuning and switch information, radio text, and so on in the lower part. For more information, refer to “Basic Structure of RDS” on page 31 “BLER” on page Keysight N9063C Analog Demod Measurement Guide...
  • Page 18 L=R or L=-R. Meas Setup 15. Listen to the demodulated You may need to adjust the volume as — Press FM stereo signal. necessary. Ad vanced Tab Demod to Speaker — Toggle Keysight N9063C Analog Demod Measurement Guide...

  • Page 19: Measuring L=R Fm Stereo/Rds Signals

    Ad vanced Ref Deviation 6. View the measurement Display, View To display only the current trace in the — Press Meas result of the multiplexed Demod Waveform window, press signal. Setup Averaging and toggle Keysight N9063C Analog Demod Measurement Guide...
  • Page 20 — AF Spectrum window (bottom left) displays the modulating signal in the frequency domain. — Metric window (bottom right) displays the numeric measurement results. 7. View the mono part of the Display View, Mono — Press multiplexed signal which corresponds to L+R. Keysight N9063C Analog Demod Measurement Guide...
  • Page 21 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes View/Display Stereo 8. View the stereo part of the — Press multiplexed signal which corresponds to L- R. Keysight N9063C Analog Demod Measurement Guide...
  • Page 22 11. View the measurement Display View, Left In this test case, the left channel equals — Press results of the left channel. to the right channel. Display View, 12. View the RDS/RBDS — Press results. RDS/RBDS Keysight N9063C Analog Demod Measurement Guide...
  • Page 23 For more information, refer to “Basic Structure of RDS” on page 31 “BLER” on page Display View, Result 13. View a summary of the — Press numeric measurement Summary results. Keysight N9063C Analog Demod Measurement Guide...
  • Page 24 L=R or L=-R. 14. Listen to the demodulated Meas Setup You may need to adjust the volume as — Press FM stereo signal. necessary. Ad vanced Tab Demod to Speaker — Toggle Keysight N9063C Analog Demod Measurement Guide...

  • Page 25: Concepts

    Keysight X-Series Signal Analyzer N9063C Analog Demod Measurement Application Measurement Guide Concepts The following topics can be found in this section: AM Concepts on page 26 FM Concepts on page 28 FM Stereo/RDS Concepts on page 30 Modulation Distortion Measurement Concepts on page 32...

  • Page 26: Am Concepts

    - - - - - - - - - - - - - - - - - - - - - - = - - - - - - - - - - - - - - - - - - - - - - = - - - - - - - - - Keysight N9063C Analog Demod Measurement Guide...
  • Page 27 100% modulated wave is 50% higher than in the unmodulated carrier. The relationship between m and the logarithmic display can be expressed as: Equation 2-2 § )dB + 6dB = 20 Keysight N9063C Analog Demod Measurement Guide...

  • Page 28: Fm Concepts

    Unlike the modulation index for AM, there is no specific limit to the value of β, since there is no theoretical limit to the phase deviation; thus there is no equivalent of 100% AM. However, in real world systems there are practical limits. Keysight N9063C Analog Demod Measurement Guide...
  • Page 29 In theory, for distortion-free detection of the modulating signal, all the sidebands must be transmitted. However, in practice, the sideband amplitudes become negligibly small beyond a certain frequency offset from the carrier, so the spectrum of a real-world FM signal is not infinite. Keysight N9063C Analog Demod Measurement Guide...

  • Page 30: Fm Stereo/Rds Concepts

    — IEC 62106: Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range from 87.5 to 108.0 MHz. — EIA/NAB NRSC: United States RBDS standard - Specification of the radio broadcast data system (RBDS). Keysight N9063C Analog Demod Measurement Guide...
  • Page 31 Figure 2-6 Basic structure of RDS BLER BLER (block error rate) is the ratio of the number of un-correctable blocks to the total number of blocks received. Normally, BLER should be less than 5%. Keysight N9063C Analog Demod Measurement Guide...

  • Page 32: Modulation Distortion Measurement Concepts

    P , the square root of the ratio of P signal total to P is calculated. The result is the signal’s modulation distortion. It signal total can be expressed as dB or %. Keysight N9063C Analog Demod Measurement Guide...

  • Page 33: Modulation Sinad Measurement Concepts

    P , the square root of the ratio of P signal total is calculated. The result is the signal’s Modulation SINAD. It can total signal be expressed as dB. Keysight N9063C Analog Demod Measurement Guide...
  • Page 34 This information is subject to change without notice. © Keysight Technologies 2008-2016 Edition 1, February 2016 N9063-90001 www.keysight.com...

This manual is also suitable for:

N9040b uxaN9030b pxaN9020b mxaN9010b exaN9000b cxa

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