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Free Run Mode -

In Free Run mode, the module starts waveform generation by a Restart command from the GUI or from API-based applications. Once the waveform starts, the module repeats the waveform continuously. There is no latency between two consecutive waveforms. The subsequent waveform starts right after the end of the preceding waveform. The waveform generation can be aborted by an Abort command from the GUI or API-based applications will output a continuous waveform without pause. From the GUI, you can use your computer to choose the waveform or make other parameter changes in free run mode.

Free Run Mode Operation Example:

» Power up the module by plugging in the power supply. Remember that you should install them as specified in the Hardware Setup page. Connect the clock source, set to 4.0 GHz frequency and 3dBm power, to CKIP on the module. Soon after the module powers up, you should see the pre-stored waveform displayed in the oscilloscope with the corresponding spectrum in the analyzer. The standalone waveform can be customized upon request.

» Open the AWG application. You should have already set up the software and drivers and have connected the module to a USB port on the computer. Upon loading the AWG application, the module will stop producing the pre-stored waveform.

» Adjust the clock in the Signature panel. For our example, we have set the clock to 4.0 GHz since our clock input is at 4.0 GHz.

» Click on the "Configuration & Status" tab to go to that panel. Make sure that the configuration is Endless Loop.

» Click on the "Waveform" tab to go to that panel. Click on the drop-down list and click on the "1/32 Sine (sine_1o32.wfa)" waveform.

» The waveform, a Sine wave at 1/32nds of the clock frequency, should load, and you should already be able to see the output in the oscilloscope and the spectrum analyzer. Right-click the mouse and select "Refresh" if necessary to refresh the waveform.

Note that DIV B is "20," which is the hexadecimal representation for decimal 32.

 

» We are going to change the waveform to a Sine wave at 1/128ths of the clock frequency.

» Change DIV B to "80", which is the hexadecimal equivalent of decimal 128.

» Now click on Download Waveform.

» The outputs on the oscilloscope and analyzer will change. In the oscilloscope, you will see that the Sine wave frequency has decreased to 1/4th of the previous frequency. In the spectrum analyzer, the frequency should have shifted to 1/4th of the previous frequency.

» If you go to the "Configuration & Status" panel and click on Update Status, the application will show that it is in the "In Loop" state. This is correct since the board only produces output waveforms in the "In Loop" state as discussed on the Internal States page.