IQ Signal Master™ MX280005A Vector Signal Analysis Software Help : Basic Operation : IQ Acquisition Overview
 
IQ Acquisition Overview
This section describes the main graphical display and its controls, settings, and information. The main screen is the primary setup panel for designating the capture characteristics. The user must specify the analyzer setup parameters, the capture bandwidth, data format, preamp and attenuation states, and designate a location for data to be stored on the local hard disk.
Note 
If streaming to a local memory (Internal or USB), use the “Combine Files” switch located on the Anritsu MS2090A Spectrum Analyzer MEASURE menu. The Combine Files switch must be set to “on” as shown below to obtain a complete file set containing the entire IQ capture data set.
For more information on capturing data directly to the spectrum analyzer, refer to the
MS2090A User Guide (10580-00444).
Convert IQ Acquisition Tool
The PC software initiates IQ streaming on the analyzer when the Stream IQ Data toolbar button is clicked. The software reads the IQ data stream over Ethernet or the PCIe interface and stores the data on the PC.
Note 
A high-speed SSD is recommended for PCIe streaming and high bandwidth settings.
The IQ streaming/storage can be set to a fixed time or stopped any time by clicking the Stop IQ Stream button.
Capture Menu Toolbar
The toolbar provides convenient controls for saving streaming data and interfacing with the analyzer.
IQ Acquisition Toolbar
Opens a window to show details about the attached spectrum analyzer.
Downloads the current analyzer settings to the Settings Window.
Initiates IQ data streaming and saves the streaming data to the output folder (see Settings Window). After it is pressed, the button changes to Stop IQ Stream and it can be used to stop the stream. It is only enabled if the analyzer is connected and the correct options are installed. The button will be unavailable if a required option is missing or if a connection via the selected streaming port is not established.
Opens Windows Explorer to the output folder location.
Deletes all supported streaming files (.dgz, .dgzm, .biq, .xdat, .xml, .xhdr) in the specified output folder (see Settings Window).
Factory reset restores the analyzer to the factory default settings for all measurement modes and system settings, including language and the display and audio settings. Ethernet settings and user files are not affected. The analyzer will automatically restart. Factory reset could be useful to correct an erroneous analyzer setting that might affect the IQ stream as it is the surest way to get the analyzer back into a known good state. A message is displayed and the user can choose whether to continue with this action.
After the reset, the analyzer will need reconfiguring and the IQ Acquisition software will need to be restarted if using PCIe.
Settings Window
The settings window provides a variety of settings for the interface to the analyzer as well as some basic measurement setup parameters. The following underlined parameters (Center Frequency, Capture Bandwidth, Reference Level, and Attenuation) shown in Figure: Convert IQ Acquisition Tool are interactive with the analyzer. Click on the parameter label to send the setting immediately to the analyzer.
Status LED and Analyzer URL
This field is used to enter the analyzer URL or IP address. The indicator to the left is described below:
Green LED: A connection has been established with the analyzer and the required option is installed. The "Stream IQ Data” button will be enabled.
Gray LED: No connection to the analyzer has been attempted.
Red LED: No analyzer is found or an analyzer is found missing option 125 or 127. Streaming is disabled.
Click the indicator or the Information button in the toolbar to display a status message dialog.
Streaming Port
Use this drop-down selection for Ethernet or PCIe data streaming. PCIe is only shown if a compatible analyzer and PCIe hardware is detected.
Continuous Mode
If checked, IQ data will continue creating a series of output files until stopped. Each time the target file size or collection size is met, a new file will be created. The IQ stream will not be continuous across files and there will be a gap.
Stop on Errors
Enabled for PCIe only. The PCIe interface can detect if a byte is wrong. This setting is on by default. Uncheck to continue streaming data even if a transfer error is detected.
Center Frequency
This field sets the analyzer’s center frequency. The setting takes affect when the Stream IQ Data is clicked.
Capture Bandwidth
This field sets the analyzer’s streaming bandwidth. The list of allowed streaming bandwidths is adjusted to match the specific analyzer option. The setting takes affect when the Stream IQ Data is clicked.
Reference Level
This field sets the analyzer’s reference level. The setting takes affect when the Stream IQ Data is clicked.
Attenuation, Auto-Attenuation, and Preamp State
This field sets the analyzer’s attenuation level manually or to AUTO ATTEN, and sets the PRE AMP state. The settings take affect when the Stream IQ Data is clicked.
Capture Bit Depth and Time Stamp
This field sets the analyzer’s streaming bit depth and toggles time stamps in the saved data file. The list of allowed streaming bit depths is adjusted to match the specific analyzer option. The settings take affect when the Stream IQ Data is clicked.
Output Format
This field sets the streamed data file and accompanying metadata file formats:
Raw IQ (DGZ): This is the native format of the Anritsu SPA. For bit-depths < 32 bits, the I and Q values are ordered in a proprietary way, and programs not specifically designed to support our DGZ files will not be able to read these. Metadata is stored in an accompanying .dgzm file.
Binary IQ (BIQ): This format undoes the I/Q pair ordering of Anritsu’s proprietary format. I/Q values are written to the file in consecutive pairs. This file format is more easily read by 3rd party software. For 32-bit files, there is no difference. Metadata is written to an .xml file. Binary IQ files cannot be loaded for Playback and Analysis.
Output Folder
This button is underlined and active. Clicking it opens the specified output folder in Windows File Explorer. This field sets the streamed data file and accompanying metadata file location where each filename is the time stamp of the data stream. Network and external drives are not recommended.
Create Subfolder
If checked, a time stamped folder is created each time a new transfer is started. This is most useful if Continuous Mode is on as then all related files are stored in a common location.
Load After Capture
When checked new data files will be automatically loaded for playback and analysis after the IQ capture is complete. Since loading a large file for the first time takes considerable time, this is automatically turned OFF if the expected file size is over 256 MB. The text changes to red to visually indicate the change. You can turn this back ON after setting the capture size if you are certain you want to load the file for playback and analysis.
Output File
This is a display-only field of the current data transfer file name.
Run Length Control
Continuous: Streaming will continue until:
The user presses “Stop”
Out of space (transfer stops with about 2 GB remaining)
An error is detected (If Stop on Errors is checked)
Size: Size is in Gigabits. Streaming will continue until:
The current file reaches the set file size and Continuous Mode is Off
Continuous Mode is set to Off during capture. The stream will end when the current file size limit is reached
The user presses “Stop”
Out of space (transfer stops with about 2 GB remaining)
An error is detected (If Stop on Errors is checked)
Time: Streaming will continue until:
The current stream time reaches the set time and Continuous Mode is Off
Continuous Mode is set to Off during capture. The stream will end when current file elapsed time reaches the set time
The user presses “Stop”
Out of space (transfer stops with about 2 GB remaining)
An error is detected (If Stop on Errors is checked)
Capture Status
The Capture Status field provides the following informational progress of the IQ capture.
Block Mode in Progress
Block capture in progress
Streaming data over Ethernet
Data stream in progress
Connection lost. Stream aborted
Data errors detected during the last transfer
Transfer error detected. Data stream aborted
No data errors detected in previous transfer
Trying to stop data stream
Data stream terminated