MX280005A Vector Signal Analysis Software Help : Basic Operation : IQ Capture Tab
 
IQ Capture Tab
The IQ Capture tab shown in Figure: IQ Capture Tab shows the signal modulation IQ setup.
IQ Capture Tab
1. IQ Capture Tab
2. Spectrum Analyzer Parameter Settings
3. Capture/Analysis Buttons
4. Status Window
IQ Capture Settings
The IQ Capture settings are shown in Figure: IQ Capture Settings.
IQ Capture Settings 
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Analyzer IP
An IP address entry turns the status green when the connection is successful and option 0128 is installed on the connected spectrum analyzer.
Center Frequency Button
Displays the Spectrum Analyzer Center Frequency. Pointing the mouse over the button enables a gray background indicating that the user can type to edit the center frequency. Press the button sends the center frequency to the SPA.
Capture Bandwidth
Displays the Capture Bandwidth frequency bandwidths list. Point the mouse over the button enables a gray background indicating that the user can type to edit the center bandwidth. Press the button sends the capture bandwidth to the SPA.
Range: 36 kHz, 280 kHz, 1.25 MHz, 1.5 MHz, 2.5 MHz, 3 MHz, 5 MHz, 6 MHz, 10 MHz, 12 MHz, 18 MHz, 20 MHz, 25 MHz, 36 MHz, 40 MHz, 50 MHz, 74 MHz, 80 MHz, 100 MHz, 110 MHz.
Sample Rate
Displays the sample rate per the Center Frequency and Center Bandwidth entered.
Reference Level
Set instrument reference level. Press the button sends the reference level to the SPA.
Range: 20 to -100 dBm
Auto-Attenuation
Check to apply Auto-Attenuation. When unchecked, the Attenuation-Level selection becomes unavailable.
Preamp state
Check to select the preamp state ON. Uncheck selects the preamp state OFF.
Attenuation Level
Type or enter an attenuation level. Press this button sends the attenuation level to the SPA.
Capture Bit Depth
Set IQ capture bit-depth.
Capture Time
Set IQ capture time. See Maximum Capture Time.
Range: 0.010 to 0.500 seconds.
S
File Location
Set active data file path.
Auto-Analysis
Automatically performs an analysis of the signal that is being captured by the spectrum analyzer. This button is active for analysis only when the Analyzer IP button from the IQ Capture tab is active (green) and the Analyze Analyze button from the Modulation Parameters tab is enabled (green). See Auto-Analysis.
Continuous
Pings the Spectrum Analyzer to continually capture data, perform an analysis, and update graphs. The ping and capture time to perform each analysis could take a few seconds depending on the complexity of the analysis. See Continuous.
Ping
Confirms and displays the communication connection response time in the instrument information window. See Status Window below.
Information Button
Displays the spectrum analyzer identification details in the window. The details include:
• Analyzer Model (Green entry indicates option connection successful)
• Analyzer Installed Options
• Analyzer Firmware Version Analyzer Serial Number Installed
Preset Spectrum Analyzer
Performs a preset on the Spectrum Analyzer.
Retrieve Spectrum Analyzer Settings
The MX280005A retrieves to match the Spectrum Analyzer settings before capturing.
Capture IQ Data
Performs IQ Capture. When capturing, IQ data is saved as a file on the Spectrum Analyzer. After capture, .dgz and .dgzm files are copied to the PC and deleted from the Spectrum Analyzer. This allows the analyzer to sign the .dgzm file. A new file is automatically selected for processing and demodulation parameters must be set. Because .dgz files must be signed, and becomes invalid if a file is converted, there are no conversion or alternate file format options.
Status Window
Press the Information Button icon to display the Instrument Information in the status window as shown in Figure: Instrument Information. The information includes the spectrum analyzers Manufacturer, Analyzer Model, Serial Number, Firmware Version, and Installed Options. The green highlight indicates the options that are installed.
Instrument Information
Auto-Analysis
Press the Auto-Analysis sets-up a capture that is triggered by pressing the Capture I/Q button. Each time the Capture I/Q button is pressed, the status window displays the Filename as a time-stamp along with the I/Q Length in the status window as shown in Figure: Status Window. The file can then be retrieved by pressing Load from the Modulation Parameters tab or Open Data File from the menu bar’s File menu and search the time-stamp file in the folder list.
Continuous
Continuous analysis is performed as a real-time measurement. Each capture is a temporary file that is not saved to a file location. As indicated below in Figure: Status Window, each capture is stamped “Continuous.” Each Continuous analysis continuously captures the signal at in few second intervals and will continue until it is stopped by pressing the Capture I/Q button as described in Stop Capture.
Status Window
1. Press Capture I/Q Button Results
2. Press Continuous Results
Stop Capture
The enabled Capture I/Q function continuously toggles between data capture mode and the data analysis mode within a few second intervals. During the data capture mode, the spectrum analyzer parameter settings and capture/analysis buttons are disabled (grayed). The Capture/Analysis Buttons become active for a few seconds and the Stop Capture I/Q button displays as shown in Figure: Stop Capture. Press the Capture I/Q to stop the continuous capture function.
Stop Capture
Right-Click the Status Window displays the context menu shown in Figure: Status Window Context Menu.
Status Window Context Menu
Copy Image to Clipboard
Copies image to clipboard. Image can be then viewed with a graphics editor.
Save Image to File
Name and save the image to a user selected file.
Clear Log
Clears the Status window.