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AD7492 Datasheet(PDF) 8 Page - Analog Devices |
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AD7492 Datasheet(HTML) 8 Page - Analog Devices |
8 / 14 page EVAL-AD7492CB –8– REV. A Figure 4. Setup Screen power supply settings indicated in the configuration file are set and the user may hear some of the relays clicking. The pull-down menus items such as number of samples and sampling frequency will have been set to the default values specified by the configuration file. The user is free to change these at will. Once all the settings had been decided the user can click Close to return to the main form. Taking Samples When the user clicks Sample the software will instruct the Evaluation Board Controller to take the required number of samples at the required frequency from the evaluation board. These samples are then uploaded and displayed. An FFT and Histogram are also calculated and displayed. If the user clicks Cont Samp the software will repeat the process indefinitely until the user clicks the button again. While the software is continuously sampling data the other control buttons are disabled. Other Buttons The Reset button will cause the Evaluation Board Controller to perform a reset function. When this happens the power supplies are turned off and the program in DSP memory is lost. The user should repeat the setup instructions to down- load another program if required. The Quit button will exit the software, the program running on the Evaluation Board Controller is not terminated. MENU BAR ITEMS The main screen of the Evaluation Board Controller contains a number of options available as pull-down menu items. The functions of these are listed below. File Menu: Setup Menu: Selecting this option displays the Setup Screen as shown in Figure 4. Load Raw Data: Selecting this option allows the user to load data which had been saved by the software during a previous session. Save Raw Data: Selecting this option allows the user to save the current set of sample data points. The data can be reloaded to the Evaluation Board Controller software at a later date or can be used by other programs for further analysis Save Binary Data: Selecting this option allows the user to save the current set of sample data points. The data is saved in binary format as a text file. This method can be useful for examining code flicker, looking for stuck bits etc. Save FFT Data: Selecting this option allows the user to save the current set of FFT data points. FFT data cannot be reloaded into the Evaluation Board Controller software but can be loaded into other software packages for further analysis. Exit: Quits the program. Printer Port: This menu item allows the user to select which printer port should be used for communication with the Evaluation Board Controller. LPT1: This option selects 0x378 as the printer port address. This is the default option. LPT2: This option selects 0x278 as the printer port address. PRN: This option selects 0x3BC as the printer port address. Help: This menu item gives information about the current revision of software for the particular evaluation board being used. |
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