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Rohde & Schwarz FSW Series User Manual

Rohde & Schwarz FSW Series
371 pages
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R&S
®
FSW-K7
Analog Demodulation Measurement
Option
User Manual
User Manual
(;×êX2)
1173.9240.02 ─ 17
Test & Measurement

Table of Contents

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Rohde & Schwarz FSW Series Specifications

General IconGeneral
BrandRohde & Schwarz
ModelFSW Series
CategoryMeasuring Instruments
LanguageEnglish

Summary

1 Preface

1.1 About this Manual

Provides information specific to the Analog Demodulation application and general instrument functions.

2 Welcome to the Analog Demodulation Application

2.1 Starting the Analog Demodulation Application

Step-by-step guide on how to activate the Analog Demodulation application on the R&S FSW.

3 Measurements and Result Displays

Basis for evaluation

Explains that all evaluations are based on acquired I/Q data and determined by demodulation bandwidth.

4 Measurement Basics

4.1 Demodulation Process - Circuit Description

Describes the software demodulator's main processor operation and calculation processes.

4.7 Receiving Data Input and Providing Data Output

4.7.1 RF Input Protection

Details the overload protection mechanism for the RF input connector to prevent instrument damage.

5 Configuration

5.1 Default Settings for Analog Demodulation

Describes the default parameters passed on from the currently active application upon first activation.

5.4 Input and Frontend Settings

5.5 Trigger Configuration

5.5.1 Trigger Source Settings

Details how to configure the trigger source for measurements, including various signal types and external triggers.

5.6 Data Acquisition

5.6.1 Bandwidth Settings

Defines which parts of the input signal are acquired and demodulated, configured via BW key or Bandwidth tab.

5.8 Demodulation

5.8.1 Basic Demodulation Measurement Parameters (Demod)

Defines the basic measurement parameters configured in the 'Demod' tab of the 'Demodulation Settings' dialog box.

5.8.3 AF Filter

5.8.4 Scaling

5.8.4.1 AF Evaluation

Settings for AF evaluations, covering deviation per division and reference value settings.

5.8.5 Units

5.9 Output Settings

5.9.1 Output Settings

Configures the output to special connectors for other devices, including trigger signals and digital I/Q output.

5.10 Automatic Settings

Adjusting all Determinable Settings Automatically (Auto All)

Activates all automatic adjustment functions for current measurement settings, including frequency, level, and scaling.

6 Analysis

6.1 Trace Settings

Allows configuration of up to 6 individual traces, including mode, detector, and trace linking.

6.3 Marker Settings

6.3.1 Individual Marker Setup

6.3.2 General Marker Settings

6.4 Marker Search Settings and Positioning Functions

6.4.1 Marker Search Settings

Defines criteria for searches, such as peak detection, influencing search results.

6.5 Marker Function Configuration

6.5.1 Phase Noise Measurement Marker

6.5.2 n dB Down Marker

6.6 Marker Peak List Configuration

6.7 Limit Line Settings and Functions

6.7.1 Limit Line Management

Manages limit lines via the 'Line Config' dialog box, allowing creation, editing, and deletion.

6.8 Zoom Functions

6.9 Analysis in MSRA/MSRT Mode

7 I/Q Data Import and Export

7.1 Import/Export Functions

Describes import and export functions available via softkeys in the Save/Recall menu.

7.2 How to Export and Import I/Q Data

8 How to Perform Measurements in the Analog Demodulation Application

9 Measurement Example: Demodulating an FM Signal

10 Optimizing and Troubleshooting the Measurement

Determining the demodulation bandwidth

Explains the impact of incorrect demodulation bandwidth on measurement accuracy and results.

11 Remote Commands for Analog Demodulation Measurements

11.1 Introduction

Introduces SCPI commands, their syntax, and general characteristics.

11.3 Activating Analog Demodulation Measurements

11.4 Configuring the Measurement

11.4.1 Managing Standard Settings

Allows configuration using predefined standard settings for quick and easy measurement setup.

11.4.2 Configuring the Input

11.4.2.2 Using External Mixers

Basic Settings

Conversion Loss Table Settings

11.4.2.3 Configuring Input via the Analog Baseband Interface (R&S FSW-B71)

Remote commands for the R&S DigIConf software

11.4.2.5 Setting up Probes

Configuring Power Sensors

Triggering with Power Sensors

11.4.2.7 External Generator Control

Measurement Configuration

Commands to activate external generator control and configure calibration measurements.

Interface Configuration

Source Calibration

11.4.3 Configuring the Output

DIAGnostic:SERVice:NSOurce

Controls the 28 V supply for the NOISE SOURCE CONTROL connector on the front panel.

OUTPut:ADEMod[:ONLine][:STATe]

11.4.4 Frequency Settings

[SENSe:]FREQuency:CENTer

Defines the center frequency of the signal, with allowed range depending on frequency span.

11.4.5 Configuring the Vertical Axis (Amplitude, Scaling)

11.4.5.1 Amplitude Settings

Provides useful commands for amplitude configuration, described elsewhere.

11.4.5.2 Configuring the Attenuation

11.4.5.3 Configuring a Preamplifier

11.4.5.4 Scaling the Y-Axis

11.4.6 Configuring Data Acquisition

11.4.7 Triggering

11.4.7.1 Configuring the Triggering Conditions

Details commands for configuring trigger conditions like holdoff, dropout time, level, and slope.

11.4.7.2 Configuring the Trigger Output

11.4.8 Configuring Demodulation

11.4.8.1 Basic Demodulation Settings

Defines basic measurement parameters like squelch state, level, AF coupling, and trace selection.

11.4.8.2 Time Domain Zoom Settings

11.4.8.3 Configuring the Demodulation Spectrum

AF evaluation

Settings for AF spectrum evaluations, including center frequency, span, and start/stop frequencies.

RF evaluation

11.4.8.4 (Post-processing) AF Filters

11.4.8.5 Defining the Scaling and Units

11.4.8.6 Scaling for AF Evaluation

Settings for AF evaluations related to scaling, including reference value and deviation.

11.4.8.8 Units

11.4.9 Adjusting Settings Automatically

Adjusting all Determinable Settings Automatically (Auto All)

Activates automatic adjustment of frequency, level, and scaling for current measurements.

Adjusting the Center Frequency Automatically (Auto Freq)

[SENSe:]ADJust:LEVel

11.4.10 Configuring Standard Traces

11.5 Capturing Data and Performing Sweeps

MSRA/MSRT operating mode

Notes on data capturing in MSRA/MSRT mode and analysis interval definition.

INITiate:CONMeas

INITiate:CONTinuous

INITiate[:IMMediate]

INITiate:REFResh

INITiate:SEQuencer:ABORt

INITiate:SEQuencer:IMMediate

INITiate:SEQuencer:REFResh[:ALL]

SYSTem:SEQuencer

11.6 Configuring the Result Display

General Window Commands

Commands for configuring general window layout, independent of the application.

11.6.2 Working with Windows in the Display

LAYout:ADD[:WINDow]? <WindowName>,<Direction>,<WindowType>

LAYout:CATalog[:WINDow]?

LAYout:REMove[:WINDow]

LAYout:REPLace[:WINDow]

11.7 Retrieving Results

Specific commands

Lists remote commands for retrieving trace results, summary values, and format information.

11.7.1 Retrieving Trace Results

[SENSe:]ADEMod:AM[:ABSolute][:TDOMain]:RESult?

FORMat[:DATA]

TRACe<n>[:DATA]

11.7.2 Exporting Trace Results

FORMat:DEXPort:HEADer

FORMat:DEXPort:TRACes

11.7.3 Retrieving Result Summary Values

CALCulate:MARKer:FUNCtion:ADEMod:CARRier[:RESult]?

CALCulate:MARKer:FUNCtion:ADEMod:FERRor[:RESult<t>]?

[SENSe:]ADEMod:FM:OFFSet?

11.7.4 Formats for Returned Values: ASCII Format and Binary Format

11.7.5 Reference: ASCII File Export Format

11.8 Analyzing Results

11.8.1 Working with Markers Remotely

Details on activating and configuring markers, including general settings and search functions.

11.8.1.1 Setting Up Individual Markers

CALCulate<n>:MARKer<m>[:STATe]

CALCulate<n>:MARKer<m>:TRACe

CALCulate<n>:DELTamarker:AOFF

CALCulate<n>:DELTamarker<m>:LINK

CALCulate<n>:DELTamarker<m>:MREF

CALCulate<n>:DELTamarker<m>[:STATe]

CALCulate<n>:DELTamarker<m>:X

CALCulate<n>:DELTamarker<m>:X:RELative?

CALCulate<n>:MARKer<m>:FUNCtion:FPEaks:ANNotation:LABel[:STATe]

CALCulate:MARKer:FUNCtion:FPEaks:COUNt?

CALCulate<n>:MARKer<m>:FUNCtion:FPEaks[:IMMediate]

CALCulate<n>:MARKer<m>:FUNCtion:FPEaks:STAT

MMEMory:STORe:LIST

MMEMory:STORe:PEAK

CALCulate<n>:MARKer<m>:FUNCtion:NDBDown

CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:FREQuency?

CALCulate:MARKer:FUNCtion:NDBDown:QFACtor?

CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:RESult?

CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:STATe

11.8.2 Defining Limit Checks

11.8.2.1 Configuring Limit Lines

Defines upper and lower limit lines using separate commands for x-values and y-values.

CALCulate:LIMit:COMMent

CALCulate:LIMit<k>:CONTrol[:DATA]

CALCulate:LIMit<k>:LOWer:MARGin

CALCulate:LIMit<k>:LOWer:STATe

CALCulate:LIMit<k>:LOWer:THReshold

CALCulate:LIMit<k>:UPPer[:DATA]

CALCulate:LIMit<k>:UPPer:OFFSet

CALCulate:LIMit<k>:UPPer:STATe

11.8.2.2 Managing Limit Lines

CALCulate:LIMit:ACTive?

CALCulate:LIMit:CLEar[:IMMediate]

CALCulate:LIMit<k>:FAIL?

Example: Configuring Limit Lines

11.8.3 Zooming into the Display

11.8.3.1 Using the Single Zoom

Zooms into a specific area of the trace, replacing the current diagram with an enlarged extract.

DISPlay[:WINDow<n>]:ZOOM:AREA

DISPlay[:WINDow<n>]:ZOOM:STATe

11.8.3.2 Using the Multiple Zoom

DISPlay[:WINDow<n>]:ZOOM:MULTiple<zoom>:AREA

DISPlay[:WINDow<n>]:ZOOM:MULTiple<zoom>:STATe

CALCulate:MSRA:ALINe:SHOW

CALCulate:MSRA:ALINe[:VALue]

CALCulate:MSRA:WINDow<n>:IVAL?

11.8.5 Configuring an Analysis Interval and Line (MSRT mode only)

11.9 Importing and Exporting I/Q Data and Results

MMEMory:LOAD:IQ:STATe

Restores I/Q data from a file to the instrument.

MMEMory:STORe:IQ:STATe

11.10 Commands for Compatibility

11.11 Programming Example

A Reference

A.1 Predefined Standards and Settings

Provides predefined standard settings for Analog Demodulation, allowing quick and easy configuration.

A.2 I/Q Data File Format (iq-tar)

A.2.1 I/Q Parameter XML File Specification

Details the structure and elements of the I/Q parameter XML file for compliance with the RsIqTar.xsd schema.

A.2.2 I/Q Data Binary File

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