大家一起讨论一下RF calibration吧，然后我整理一份完整的文档共享出来希望作为参考

hanxu

很希望把自己经验共享给大家，所以希望集中从calibration的原理，算法和实现三个方面总结，希望能集中不同平台的解决方法。

jash

<P>怎么说呢</P><P>你先开个头吧</P>

toowood

<P>AFC  AUTO Frenquency calibration</P><P>APC  AUTO power calibration</P><P>AGC AUTO gain calibration</P>

ciscospeed

<P align=left><FONT color=#000000><FONT face=Arial size=2>1</FONT>       APC <FONT face=Arial size=2>Power level: Power level calibrated and</FONT> <FONT face=Arial size=2>tolerances, how is data for NVRAM calculated</FONT><FONT face=Arial size=2></FONT> <FONT face=Arial size=2> </FONT></FONT></P><DIV dir=ltr align=left><FONT face=Arial><FONT color=#000000 size=2>For 4 bands:</FONT></FONT></DIV><DIV dir=ltr align=left><FONT face=Arial><FONT color=#000000 size=2>GSM859/900: pcl 5-19;  dBm:32,31,29,27,25,23,21,19,17,15,13,11,9,7,5</FONT></FONT></DIV><DIV dir=ltr align=left><FONT face=Arial><FONT color=#000000 size=2>DCS1800/PCS1900: pcl 0-15; dBm:29,28,26,24,22,20,18,16,14,12,10,8,6,4,2,0</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT size=+0><FONT face=Arial><FONT size=2><FONT color=#000000>recommended tolerances: ±0.2</FONT></FONT></FONT></FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT size=+0><FONT size=2><FONT face=Arial color=#000000>scale factor value should be saved into flash </FONT></FONT></FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT size=+0><FONT size=2><FONT face=Arial color=#000000></FONT></FONT></FONT></FONT> </DIV><BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"><DIV><P align=left><FONT color=#000000><FONT face=Arial size=2>2      AGC</FONT> <FONT face=Arial size=2>Radio</FONT><FONT face=Arial size=2> gain measured</FONT><FONT face=Arial size=2> and siggen.</FONT> </FONT></P></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>Mid channel for each band;</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>Generator is set to -85dBm for MaxGain test</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>should be as:send "CalDevGsmGainProgramReq" to handset, and handset return "rssilevel",then MaxGain = rssilevel/16 - (-85);</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>Generator = -65dBm for Reduction Gain test</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>same as above: Reduc Gain = (MaxGain - (rssilevel/16 - (-65)));</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>Then, fill the Gain code table for each band;    </FONT></FONT></DIV><P align=left><FONT color=#000000><FONT face=Arial size=2>3</FONT>     AFC  <FONT face=Arial size=2> TX power vs frequency:</FONT> <FONT face=Arial><FONT size=2>P</FONT><FONT size=2>ower level and channels used</FONT></FONT><FONT face=Arial><FONT size=2>, how is data calculated </FONT></FONT></FONT></P><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>This process is same as power level. The different is the measurment channel. . </FONT></FONT></DIV><P align=left><FONT color=#000000><FONT face=Arial size=2>4</FONT>       <FONT face=Arial size=2> RSSI vs frequency:</FONT><FONT face=Arial size=2></FONT> <FONT face=Arial size=2>P</FONT><FONT face=Arial size=2>ower level and channels used</FONT><FONT face=Arial size=2>, how is data </FONT><FONT face=Arial><FONT size=2>calculated </FONT></FONT></FONT></P><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>The commands same as RX gain</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial color=#000000 size=2>Send "CalDevGsmGainProgramReq" return "rssilevel"</FONT></FONT></DIV><DIV dir=ltr align=left><FONT size=+0><FONT face=Arial size=2></FONT></FONT><FONT face=Arial color=#000000 size=2>Rssicomp[channel] =  -16 * (rssilevel - (-85) - MaxGain)</FONT></DIV></BLOCKQUOTE>[br]<p align=right><font color=red>+5 RD币</font></p>

cuijw

<P>楼上的是ADI的吗？</P>

jash

<P>上面说的一点都不实用</P>

hust2000ljs

<P>楼主，每个平台都有自己的rf calibration sofeware spec，好好看看spec就可以了。平台的校准的方法都是不一样的，而且这个东西没有必要求同存异，整理出一套规范，而且校准中所用到的计算方法也不一样。</P>[br]<p align=right><font color=red>+3 RD币</font></p>

laogen12345

我这有GSM、CDMA2000、WCDMA的校准资料，有谁想要联系我

eguyaxu

这些应该是工厂生产用的吧？[em13][em13]

xu3314334

APC Calibration fail

lihongshun101

是个好主意但是 不能统一吧 各平台都有各自的标准

tianzijian82

负载拉移(Load-Pull)原理在射频功率放大器设计中的应用（台湾）

gyxfwind

谢谢分享 学习一下