Texas Instruments GC5325, Руководство пользователя

Страница: 28 / 35

Summary
www.ti.com
This plot shows the phase response of the PA at a particular operating point. When the PA is operating in
a linear region, the phase response are linear and shows near 0 degrees of variation. As the PA operates
near saturation, the phase difference will change.
In both cases, the AM-AM and AM-PM plots are useful to help understand the PA amplitude and phase
response before and after linearization.
Re-capture - Clicking on this button displays the settings selected in the Capture Buffer section.
Figure 28.
5.11 Quit and Command/Message window
Quit - To quit the GUI, click on the “ QUIT ” button located at the bottom center of the GUI. This should
always be done before powering down the EVM.
Calc - This button opens a windows calculator when selected.
The command/message window displays the command that the DSP and SPI bus is currently processing.
Commands can also be issued by entering the appropriate text in this widow and clicking on the Eval
button. This feature is not recommend to be used. The
“ Clear ” button clears the command/message
window. The “ Eval ” button will evaluate the command entered in the command/message window. This is
used internally for debug reasons.
6 Summary
If the user has successfully completed the preceding steps, the system has applied linearization to one or
two PAs at a user-defined power level. Additional power amplifiers can be tested over various operating
conditions using the appropriate steps previously outlined. Additional functions may be required, and the
users are encouraged to request these from Texas Instruments through their local support group. This
guide does not support custom DUC, CFR, or DPD settings, although this is possible.
28 GC5325 System Evaluation Kit SLWU063F – April 2009 – Revised April 2011
Submit Documentation Feedback
Copyright © 2009 – 2011, Texas Instruments Incorporated