IQ Signal Masterâ„¢ MX280005A Vector Signal Analysis Software Help : Basic Operation : Playback Mode
 
Playback Mode
The Playback mode takes IQ data and creates time slices and performs FFTs to create a sweep trace to display along with a Spectrogram. The IQ data is also displayed in a Power vs. Time and I vs. Q plot.
Playback Menu
1. Signal Data Parameters: See Signal Parameters.
2. Power vs. Time Graph: Displays power vs time.
3. IQ Constellation Plot: Plots the raw I/Q value pairs from the data file used to generate each frequency plot. This is raw I/Q data and will not align with the symbol points in a more familiar constellation diagram.
4. Marker Table (Shown): Captures Points of Interest. This table also can be changed to Peak Table, AM Audio, FM Audio, Time Marker Table. See Marker Table.
5. Playback Toolbar: See Playback Toolbar.
6. Spectrogram Window: The display area shows spectrogram trace data in the time (vertical axis), frequency (horizontal axis), and amplitude (color) domains.
7. Spectrum Window: Spectrum trace data in the frequency domain.
Playback Menu Bar
The Playback menu bar is shown in Figure: Playback Menu Bar.
Playback Menu Bar
File Menu
Displays the Playback View menu command as shown in Figure: Playback File Menu
Playback File Menu
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Recent IQ Files
Open to display the recent IQ files that have been viewed.
Reload IQ Data
Reload the most recent viewed file.
Exit:
Exits the program.
View Menu
Displays the Playback View menu command as shown in Figure: Playback View Menu.
Playback View Menu
Power vs. Time
Click to change the top right graph to Power vs. Time. A check mark indicates active.
Occupied BW vs. Time
Click to change the top right graph to Occupied Bandwidth. A check mark indicates active.
 
 
 
 
Settings
The Playback Settings menu command is shown in Figure: Playback Settings Menu.
Playback Settings Menu
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Application Settings
Provides Screenshot Options dialog shown below.
Screenshot Folder: Displays the file name where the screenshots will be stored.
Folder Icon: Open to browse to a folder location to store the screenshots.
Screenshot Destination: Select store to clipboard, Disk File, or Both.
Help Menu
The Playback Help file is the same as described in Help Menu.
Playback Toolbar
The spectrogram toolbar shown in Figure: Spectrogram Toolbar provides controls of the spectrogram stream display.
Spectrogram Toolbar
The spectrogram toolbar controls are described in Table: Spectrogram Toolbar.
Spectrogram Toolbar
Time Resolution
Provides a time resolution zoom feature of the Spectrogram. Hover the mouse over the green bar and move the green bar to the left to decrease the resolution and to the right for more resolution.
Rewind
Click jumps back in the spectrogram time span. For example, click will jump back 20 ms and sweep for 10 ms and stop. Each click repeats this pattern until the sweep is pushed back to the beginning of the sweep.
Stop
Click to stop the playback stream. Click play starts from the beginning.
Play
Click to play (resume) the playback stream.
Pause
Click to pause the playback stream. Click play resumes play. You can also move the time slider (shown in Figure: Set Frequency Markers) and click play to resume from the new positioned location.
Double Arrow Right
Click jumps forward in the spectrogram time span. For example, click will jump forward 10 ms and stop. Each click repeats this pattern until the sweep is pushed forward to the end of the sweep.
Playback Rate
Provides speed control of the spectrogram. Click Slow to reduce the speed of the playback stream. Click Fast to increase the speed of the playback stream. The speed bar provides a view of the relative stream speed of the spectrograph display.
To the left (Slow) runs the display at one sweep per second. A slow stream speed is useful for providing a view of every step in the stream, but takes much longer to complete a sweep. As the sweep is increased, the speed indicator displays yellow and then red, indicating that you are skipping over data as it sweeps to adjust to the set speed.