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CDB5521 参数 Datasheet PDF下载

CDB5521图片预览
型号: CDB5521
PDF下载: 下载PDF文件 查看货源
内容描述: 评估板和软件 [Evaluation Board and Software]
分类和应用:
文件页数/大小: 28 页 / 1051 K
品牌: CIRRUS [ CIRRUS LOGIC ]
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CDB5521/22/23/24/28  
menu bar item Menu is initially disabled. This  
eliminates any conflicts with the mouse or concur-  
rent use of modems. Before proceeding any further,  
the user is prompted to select the serial communi-  
cation port. To initialize a port, pull down option  
Setup from the menu bar and select either COM1 or  
COM2. After a port is initialized, it is a good idea  
to test the RS-232 link between the PC and the  
evaluation board. To do this, pull down the Setup  
menu from the menu bar and select the option  
TESTRS232. The user is then prompted to set the  
evaluation board’s test switches to 011 and then re-  
set the board. Once this is done, proceed with the  
test. If the test fails, check the hardware connection  
and repeat again. Otherwise, set the test switches to  
000 (normal mode) and reset the board. The option  
Menu is now available and performance tests can  
be executed.  
2. PART II: SOFTWARE  
2.1 Installation Procedure  
To install the software:  
1) Turn on the PC, running Windows 95TM or lat-  
er.  
2) Insert the Installation Diskette #1 into the PC.  
3) Select the Run option from the Start menu.  
4) At the prompt, type: A:\SETUP.EXE <enter>.  
5) The program will begin installation.  
6) If it has not already been installed on the PC,  
the user will be prompted to enter the directory  
in which to install the CVI Run-Time En-  
gineTM. The Run-Time EngineTM manages exe-  
cutables created with Lab Windows/CVITM. If  
the default directory is acceptable, select OK  
and the Run-Time EngineTM will be installed  
there.  
The evaluation software provides three types of  
analysis tests - Time Domain, Frequency Domain,  
and Histogram. The Time Domain analysis pro-  
cesses acquired conversions to produce a plot of  
Conversion Sample Number versus Magnitude.  
The Frequency Domain analysis processes ac-  
quired conversions to produce a magnitude versus  
frequency plot using the Fast-Fourier transform  
(results up to Fs/2 are calculated and plotted). Also,  
statistical noise calculations are calculated and dis-  
played. The Histogram analysis test processes ac-  
quired conversions to produce a histogram plot.  
Statistical noise calculations are also calculated and  
displayed (see Figures 4 through 9).  
7) After the Run-Time EngineTM is installed, the  
user is prompted to enter the directory in which  
to install the CDB55521/22/23/24/28 software.  
Select OK to accept the default directory.  
8) Once the program is installed, it can be run by  
double clicking on the Eval5522 icon, or  
through the Start menu.  
Note: Thesoftwareiswrittentorunwith640x480resolution;  
however, it will work with 1024 x 768 resolution.  
If the user interface seems to be a little small,  
the user might consider setting the display  
settings to 640 x 480. (640x480 was chosen to  
accommodate a variety of computers).  
The evaluation software was developed with Lab  
Windows/CVITM, a software development package  
from National Instruments. More sophisticated  
analysis software can be developed by purchasing  
the development package from National Instru-  
ments (512-794-0100).  
2.2 Using the Software  
At start-up, the window Start-Up appears first (Fig-  
ure 5). This window contains information concern-  
ing the software’s title, revision number, copyright  
date, etc. Additionally, at the top of the screen is a  
menu bar which displays user options. Notice, the  
DS317DB2  
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