IQ Signal Master™ MX280005A Vector Signal Analysis Software : Analysis Example Files : Modulation Analysis
 
Modulation Analysis
Open the example files menus from the HELP menu as shown on Figure: Example Files - Modulation Analysis. For this example, download Modulation Analysis.
Example Files - Modulation Analysis
Create a folder to store the Modulation Analysis example file. Click Modulation Analysis opens a Browser dialog. Press OK to download the files into the user created file. Here, the Modulation Analysis example files have been loaded in the folder: Documents >Anritsu > IQ Files as shown in Figure: Download Modulation Analysis. Three file sets are downloaded, the IQ raw data file (.dgz) and metadata file (.dgzm) for each 32APSK, 64QAM, and P14DQPSK file.
Download Modulation Analysis
Analysis.htm File
Included in the download file is the Analysis.htm file. Open to display the parameters shown for each file as shown in Figure: Analysis.htm Parameters. Use these parameters to perform analysis of the files loaded in Figure: Download Modulation Analysis.
Analysis.htm Parameters
Use the Browse Menu
Use the MX280005A IQ Signal Master Browse menu and open the Example folder for the 32APSK, 64QAM, and P14DQPSK files as shown in Figure: Analysis Files.
Analysis Files
1. Browse Menu
2. Example File Folder
3. Analysis Files Types
Load File
Click the 32APSK file to load it into the analysis program. When loading is complete, the files parameters are shown in the top menu bar as shown in Figure: 32APSK File.
32APSK File
1. File Parameters
2. Select 32APSK File
Confirm the loaded file by pressing Playback menu to view the loaded file IQ data as shown in Figure: Playback Menu.
Playback Menu
Analyze the Signal
Use the 32APSK parameters listed in Figure: Analysis.htm Parameters to setup the 32APSK modulation parameters shown in Figure: Modulation Parameter Setup Entry's.
Procedure
1. Refer to the Parameter Setup window.
2. Press the Modulation radio button to view the Modulation window.
3. Set the Measuring Object to Non-formatted.
4. Set the Modulation type by pressing the drop-down arrow and selecting 32APSK.
5. Set the Symbol Rate to 500.0 ksps.
6. Press OK.
Modulation Parameter Setup Entry's
1. Analyze Menu
2. Parameter Setup Window
3. Modulation Parameter
4. Modulation Object - Non-Formatted
5. Modulation Type - 32APSK
6. Symbol Rate - 500.000 ksps
Set Up the 32APSK Filter Parameters
Set up the 32APSK modulation parameters as shown in Figure: Filter Parameter Setup Entry's.
Procedure
1. Refer to the Parameter Setup window.
2. Press Filter.
3. Set the Measurement Filter to Root Nyquist.
4. Set the Reference Filter to Nyquist.
5. Press OK.
Filter Parameter Setup Entry's
1. Parameter Setup Window
2. Filter Parameter
3. Measurement Filter - Root Nyquist
4. Reference Filter - Nyquist
Set Up the 32APSK Data Parameters
Set up the 32APSK modulation parameters as shown in Figure: Data Parameter Setup Entry's.
Procedure
1. Refer to the Parameter Setup window.
2. Press Data.
3. Set the Measurement Interval to 512 Symbol.
4. Press OK.
Data Parameter Setup Entry's
1. Parameter Setup Window
2. Data Parameter
3. Measurement Interval - 512 Symbol
Set Up the 32APSK Detail Settings Parameters
Set up the 32APSK modulation parameters as shown in Figure: Data Parameter Setup Entry's.
Procedure
1. Refer to the Parameter Setup window.
2. Press Detail Settings. For this example, no settings are required as the default settings are correct as is.
3. Press OK.
Data Parameter Setup Entry's
1. Parameter Setup Window
2. Detail Settings
Set Analysis Types
Set the Analysis types as shown in Figure: View Types.
Procedure
1. Click the View tab.
2. Set analysis types. For this example, click Constellation, EVM vs. Symbol, Eye Diagram, and Numeric.
View Types
1. Analysis Types
2. View Tab
Analyze the 32APSK Data
1. Click the Modulation Parameters tab.
2. Press the Analyze button.
The Analysis of the set up 32APSK parameters is shown in Figure: Analyze 32APSK.
Analyze 32APSK
1. Modulation Parameters Tab
2. Analyze Button
Added Files
The analysis process has added the 32ASPK.anr and 32APSK.vsa files to the IQ Files Examples folder as shown in Figure: Analysis Files Added. When an IQ file is loaded for the first time, additional processing is required. The (.anr) file stores this information so that subsequent loading is faster. This will be more evident when we work with larger files. The time to process the loading is greatly reduced. The .vsa file is the analysis file that produces the metadata for analysis.
Analysis Files Added
64QAM File Example
Click the 64QAM file to load it into the analysis program. When the program loads, the files parameters are shown in the top menu bar as shown in Figure: 64QAM File. Set the 64QAM parameters in the same way as the 32APSK parameters, using the parameter values in the 64QAM section of the Analysis.htm information file.
64QAM File
1. File Parameters
2. Select 64QAM File
The Analysis of the set up 64QAM parameters is shown in Figure: Analyze 64QAM Data Set.
Analyze 64QAM Data Set
1. Modulation Parameters Tab
2. Analyze Button