IQ Signal Masterâ„¢ MX280005A Vector Signal Analysis Software Help : Basic Operation : Loading an IQ Data File
Loading an IQ Data File
This section assumes that an IQ data file has already been imported from an Anritsu receiver or instrument. For instructions on creating and importing an IQ Data File from the receiver or instrument to the MX280005A IQ Signal Master software application, find your product on the Anritsu product page:
A data file location is created when the MX285000A IQ Signal Master software has been loaded. The default location is created in the Documents folder. The path is: Documents | Anritsu | IQ Files. From the MX285000A menu bar, click File and select Open Data File as shown in Figure: Open Data File.
Open Data File
Open the .dgzm File
1. Go to the IQ Files folder. Unless renamed by a user, all the .dgzm files are saved with a time stamp. Here we select the user renamed file as indicated in Figure: .dgzm File Time Stamp.
.dgzm File Time Stamp
2. Open the .dgzm file.
3. View the displayed MX280005A UI.
4. Click the IQ Summary Icon to show the IQ Summary window as shown in Figure: View IQ Summary.
View IQ Summary
1. IQ Summary Icon
2. IQ Summary Quick View
3. IQ Summary Parameters
4. Data Offset: The Data Offset field allows the user to select the point in the data file where the analysis begins. The default is 0, and the analysis will be at the first frame found in the I/Q data file. Setting this value higher will provide an offset into the data file, such that frames beyond the first can be analyzed. This is a byte offset, not a frame offset. Pressing up and down will move the offset by 1% increments. To the right of the Offset control is a display of the percent offset into the file.
5. Verify the data pattern displayed in the quick view window a composed view and not random data.
6. View the selected Data File to confirm this is the file that will be analyzed.
Set Up Parameters
If a data file had been preselected from the Standard Setup, the Modulation, Filter, Data, and Detail settings dialogs would be preset. For this example, data for these dialogs is entered as follows:
1. Click the Modulation button.
2. Click the Modulation button to open the Modulation dialog.
3. Click the Modulation Type drop-down.
4. Click the modulation type list. For this example, 16QAM is selected.
Modulation Type List
5. Type Corresponding Capture Parameters. For this example, the only change from the default settings is Symbol Rate set to 10 Msps.
Type Symbol Rate
After each Parameter Setup is clicked Ok, the corresponding button turns green.
Type Filter Parameters
Set Up Data Parameters
1. Click the Data button.
2. Review and change the Measurement Interval per your data measurement requirement. In this example, the amount of symbols that defines a frame is 256.
Set Up Details Settings Parameters
The Detail Settings sets up the measurement display.
1. Open the Detail Settings dialog.
2. Set the parameters to create the type of modulation analysis desired. Refer to Figure: Set Up Details Settings. In this example, the detail settings have been set as follows:
3. Set Origin Offset Cancel to On.
4. Set Origin Offset Reference to Offset Symbol.
5. Set Droop Cancel to On.
6. Set Adaptive to Adaptive.
7. Set Deviation Calculation to Before Measurement Filter. All other default settings are set.
8. Click Ok,
Set Up Details Settings
Initiate IQ Data Demodulation
To initiate the IQ data demodulation analysis, click Analyze as shown in Figure: Set Up Details Settings. Note all of the Parameter Setup buttons should be green.
Analyze IQ Data
The data processing will take a few seconds to complete, In this example, no prior View Modes Tab had been selected so the default view mode is Numeric as shown in Figure: Results in Numeric View.
Results in Numeric View
If other View modes are already selected, those view modes will also be populated with the new results. As the modulation data is analyzed, different view modes can then be selected as well. In this example, Constellation, EVM vs. Symbol, and Eye Diagram have been selected along with the default Numeric view as shown in Figure: Four View Modes. Additional modulation analysis views can be selected and added to the views. Click Check All at the bottom-left section of the display screen to select and display all of the modulation analysis views.
Four View Modes