Keysight N9030A Measurement Manual
  1. Manuals
  2. Brands
  3. Keysight Manuals
  4. Measuring Instruments
  5. N9030A
  6. Measurement manual

Keysight N9030A Measurement Manual

Signal analyzer analog demod measurement application
Hide thumbs Also See for N9030A:
Table of Contents

Advertisement

Quick Links

See also: Manual
Keysight X-Series Signal Analyzers
This manual provides documentation for the following Analyzers:
PXA Signal Analyzer N9030A
EXA Signal Analyzer N9010A
MXE EMI Receiver N9038A
Notice: This document contains references to Agilent.
Please note that Agilent's Test and Measurement business
has become Keysight Technologies. For more information,
go to www.keysight.com.
MXA Signal Analyzer N9020A
CXA Signal Analyzer N9000A
N9063A &
W9063A
Analog Demod
Measurement
Application
Measurement
Guide

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the N9030A and is the answer not in the manual?

Questions and answers

Related Manuals for Keysight N9030A

Summary of Contents for Keysight N9030A

  • Page 1 EXA Signal Analyzer N9010A CXA Signal Analyzer N9000A MXE EMI Receiver N9038A Notice: This document contains references to Agilent. Please note that Agilent’s Test and Measurement business has become Keysight Technologies. For more information, go to www.keysight.com. N9063A & W9063A Analog Demod...
  • Page 2 CAUTION MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. A CAUTION notice denotes a hazard. It KEYSIGHT SHALL NOT BE LIABLE FOR calls attention to an operating ERRORS OR FOR INCIDENTAL OR procedure, practice, or the like that, if CONSEQUENTIAL DAMAGES IN...
  • Page 3 To receive the latest updates by email, subscribe to Keysight Email Updates at the following URL: http://www.keysight.com/find/emailupdates Information on preventing analyzer damage can be found at: http://www.keysight.com/find/tips 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 Making the Initial Signal Connection Using Analyzer Mode and Measurement Presets The 3 Steps to Set Up and Make Measurements Demodulating an AM Signal Demodulating an FM Signal Demodulating an FM Stereo/RDS Signal Measuring L Only FM Stereo/RDS Signals...
  • Page 6 Contents...

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

    Demodulating AM, FM, ΦM, FM Stereo/RDS Signals 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 measurements provide functionalities that can generally be categorized as follows: •...

  • Page 8: Setting Up And Making A Measurement

    Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Setting Up and Making a Measurement Setting Up and Making a Measurement Making the Initial Signal Connection Set the AM, FM, ΦM, or FM Stereo/RDS transmitter under test to transmit the RF power. Connect the transmitting signal to the signal analyzer as below. CAUTION Before connecting a signal to the analyzer, make sure the analyzer can safely accept the signal level provided.

  • Page 9: The 3 Steps To Set Up And Make Measurements

    Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Setting Up and Making a Measurement The 3 Steps to Set Up and Make Measurements All measurements can be set up using the following three steps. The sequence starts at the Mode level, is followed by the Measurement level, then finally, the result displays may be adjusted.
  • Page 10 AMPTD Y Scale Quick Save, Save, Recall, File, Print NOTE If you encounter a problem, or get an error message, see the guide “Instrument Messages”, which is provided on the Documentation CD ROM, and in the instrument here: C:\Program Files\Keysight\SignalAnalysis\Infrastructure\Help\bookfiles.

  • Page 11: Demodulating An Am Signal

    Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an AM Signal Demodulating an AM Signal This section demonstrates how to demodulate and listen to an AM signal. You can tune to an AM signal and view the results of the detector output displayed in the quad-view window or in single-window format.

  • Page 12: Demodulating An Fm Signal

    Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Signal Demodulating an FM Signal This section demonstrates how to demodulate and listen to an FM signal. You can tune to an FM signal and view the results of the detector output displayed in the quad-view window or single-window format.

  • Page 13: Demodulating An Fm Stereo/Rds Signal

    Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Demodulating an FM Stereo/RDS Signal This section demonstrates how to demodulate and listen to an FM Stereo signal and view key messages carried in RDS (Radio Data System). You can tune to an FM Stereo/RDS signal and view the measurement results of the multiplexed signal, the mono signal, the stereo signal, the left and right channel of the stereo signal, and the RDS messages in separate views.
  • Page 14 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes Press View/Display, MPX. To display only the current trace in 6 View the measurement the Demod Waveform window, result of the multiplexed press Meas Setup and toggle signal.
  • Page 15 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes Press View/Display, Stereo. 8 View the stereo part of the multiplexed signal which corresponds to L-R. Press Meas Setup, Filters. The highpass filter, lowpass filter, 9 (Optional) Set the baseband and bandpass filter can be filters to improve the...
  • Page 16 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes Press Meas Setup, Filters, 10 If pre-emphasis is used in De-Emphasis and choose the the signal under test, set to appropriate de-emphasis filter. use de-emphasis in the signal analyzer.
  • Page 17 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes Press View/Display, 13 View the RDS/RBDS results. RDS/RBDS. 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.
  • Page 18 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes Press View/Display, Result 14 View a summary of the numeric measurement Metrics. results. In this view, the left to right separation result is displayed as "Left to Right" and the mono to stereo NOTE crosstalk is displayed as "Mono to Stereo".

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

    Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Measuring L=R FM Stereo/RDS Signals The parameters of the signal under test are as below. FM reference deviation: 75 kHz Pilot deviation: Pilot frequency: 19 kHz Stereo frequency: 38 kHz Left = Right tone: 1.0 kHz RDS deviation: RDS frequency: 57 kHz...
  • Page 20 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes The figure below shows measurement results of the multiplexed signal, including mono part, stereo part, RDS/RBDS, and pilots. There are four windows: • RF Spectrum window (top left) displays the RF spectrum of the multiplexed signal. •...
  • Page 21 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes Press View/Display, Stereo. 8 View the stereo part of the multiplexed signal which corresponds to L- R. Press Meas Setup, Filters. The highpass filter, lowpass filter, 9 (Optional) Set the baseband and bandpass filter can be filters to improve the...
  • Page 22 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes Press Meas Setup, Filters, 10 If pre-emphasis is used in De-Emphasis and choose the the signal under test, set to appropriate de-emphasis filter. use de-emphasis in the signal analyzer.
  • Page 23 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes 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”...
  • Page 24 Demodulating AM, FM, ΦM, FM Stereo/RDS Signals Demodulating an FM Stereo/RDS Signal Step Action Notes In this view, the left to right separation result is displayed as "Left to Right" and the mono to stereo NOTE crosstalk is displayed as "Mono to Stereo". Normally, left to right separation test is taken when the audio signal under test is L only or R only;...

  • Page 25: Concepts

    Concepts 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 Demodulating an AM Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) on page 32 Demodulating an FM Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) on page 33 “Demodulating an FM Stereo/RDS Signal Using the Analyzer as a Fixed...

  • Page 26: Am Concepts

    Concepts AM Concepts AM Concepts Figure 2-1 AM waveform In AM (Amplitude Modulation), the instantaneous amplitude of the modulated carrier signal changed in proportion to the instantaneous amplitude of the information signal. Figure 2-2 Calculation AM index in time and frequency domain The modulation index "m"...
  • Page 27 Concepts AM Concepts Equation 2-2 ⁄ )dB + 6dB = 20...

  • Page 28: Fm Concepts

    Concepts FM Concepts FM Concepts Figure 2-3 FM waveform FM (Frequency Modulation) and PM (Phase Modulation) belong to angle modulation. In FM, the instantaneous frequency deviation of the modulated carrier signal changed in proportion to the instantaneous amplitude of the modulating signal.
  • Page 29 Concepts FM Concepts The Bessel function graph shows the amplitudes of the carrier and the sidebands as a function of modulation index, β. The spectral components, including the carrier, change their amplitudes as the modulation index varies. Figure 2-4 Carrier and sideband amplitude for angle-modulated signals In theory, for distortion-free detection of the modulating signal, all the sidebands must be transmitted.

  • Page 30: Fm Stereo/Rds Concepts

    Concepts FM Stereo/RDS Concepts FM Stereo/RDS Concepts FM stereo is an enhancement of FM by using stereo multiplexing. An FM stereo signal carries stereophonic programmes in which different contents are transmitted for L (left) and R (right) audio channels. RDS (Radio Data System) is the text information such as traffic, weather, and radio station information carried in FM signals.
  • Page 31 Concepts FM Stereo/RDS Concepts RBDS is the United States version of RDS. Both RDS and RBDS are intended for application to VHF/FM sound broadcasts in the range 87.5 MHz to 108.0 MHz which may carry either stereophonic or monophonic programmes. The main objectives of RDS/RBDS: •...

  • Page 32: Demodulating An Am Signal Using The Analyzer As A Fixed Tuned Receiver (Time-Domain)

    Concepts Demodulating an AM Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) Demodulating an AM Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) The X-Series signal analyzer can be used to recover amplitude modulation on a carrier signal.

  • Page 33: Demodulating An Fm Signal Using The Analyzer As A Fixed Tuned Receiver (Time-Domain)

    Concepts Demodulating an FM Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) Demodulating an FM Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) To recover the frequency modulated signal, an analyzer can be used as a manually tuned receiver.

  • Page 34: Demodulating An Fm Stereo/Rds Signal Using The Analyzer As A Fixed Tuned Receiver (Time-Domain)

    Concepts Demodulating an FM Stereo/RDS Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) Demodulating an FM Stereo/RDS Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain) FM Stereo/RDS signal contains mono part, stereo part, RDS/RBDS, and pilots. The process of demodulating FM Stereo/RDS signal is more complicated than simple FM signal and is described as below.

  • Page 35: Modulation Distortion Measurement Concepts

    Concepts Modulation Distortion Measurement Concepts Modulation Distortion Measurement Concepts Purpose This measurement is used to measure the amount of modulation distortion contained in the modulated signal by determining the ratio of harmonic and noise power to fundamental power. This measurement verifies the modulation quality of the signal from the DUT.

  • Page 36: Modulation Sinad Measurement Concepts

    Concepts Modulation SINAD Measurement Concepts Modulation SINAD Measurement Concepts Purpose Modulation SINAD (SIgnal to Noise And Distortion) measures the amount of Modulation SINAD contained in the modulated signal by determining the ratio of fundamental power to harmonic and noise power. Modulation SINAD is the reciprocal of the modulation distortion provided by the Modulation Distortion measurement.

This manual is also suitable for:

X seriesN9020aN9000aN9038aN9010aN9063a ... Show all

Table of Contents

Save PDF