EVAL-AD7476

Included in the EVAL-AD7476/77CB evaluation board package is a PC-compatible disk which contains software for controlling and evaluating the performance of the AD7476/77 when it is operated with the EVAL-CONTROL BOARD. The EVAL-AD7476/77CB Demonstration/
Evaluation Software runs under DOS 4.0 or later and requires a minimum of a 386-based machine with 400kB of base RAM and 500kB of free hard disk space. The user interface on the PC is a dedicated program written especially for the AD7476/77.

The disk which accompanies the EVAL-AD7476/77CB contains several files. The user should create a new directory on the main PC drive and label this "AD7476/77". Then, all files on the EVAL-AD7476/77CB disk should be copied into this directory. The Mouse Driver on the PC should be enabled before running the software. If this has not been loaded, the program will not run.

To run the software, simply make the EVAL-AD7476/77CB directory the current directory and type "go". When the evaluation program starts, the user sees the screen shown on Figure 3 (without any FFT or scope waveforms). This is the main screen and it is divided into three parts. The top part provides the main control interface for the AD7476/77 evaluation software. The middle part of the main screen functions as a Digital Storage Oscilloscope and the bottom part of the main screen operates as either a Digital Spectrum Analyzer or a Histogram analyzer.

Each part of the screen has several buttons that can be pressed by using the mouse or the keyboard. To press a button using the mouse, simply useEVAL-AD7476/77CB to move the onscreen pointer to the button to be activated and click. To use the keyboard, simply press the appropriate key as highlighted on the button. Lower case letters must beused. When a button is pressed, it is highlighted on the screen. The next button can be highlighted by using the Tab key or the previous button by holding down the shift key and the Tab key together. The highlighted button can also be pressed by pressing the space bar. Pressing the ESC key halts any operation currently in progress. In this document, if a button can be activated from the keyboard then the key used is shown in bold in the button name.

For example, "no prog" has the "p" highlighted in bold, indicating that the button can be activated by pressing the p key. Some buttons EVAL-AD7476/77CB have a red indicator. A red indicator on the button means that the function associated with that button is on. Absence of the red indicator light means that the function associated with the button is off. The on/off status of these buttons is changed simply by selecting the button.