AD6548 AFC FAIL！

我们刚开始在MT6223D平台上调试AD6548,板子测试的时候发现这个问题:[/COLOR]
MTK GSM Test Sequence Demo
-------------------------------
Date : 04-07-2010 Time 14:53:09

------------
ATE Tool Version:5.0820.3
Part Number: TL2008
Serial Number: 000001
Revision: W08.20
Batch: 01
Bar Code: 04070100989
Error Code: 501
------------

Enter into META Mode OK
CAP ID[0]:0,DAC:4096,Freq:77.48(PPM),Center Freq:903.00,Tch:65
CAP ID[1]:63,DAC:4096,Freq:-35.40(PPM),Center Freq:903.00,Tch:65
Crystal CAPID check begin
CAPID=31,AFC DAC=0,FreqErr=-23943.1
PASS: Freq error PPM =-26.5
CAPID=31,AFC DAC=8191,FreqErr=26221.5
PASS: Freq error PPM =29.0
result[0]:-26.5
result[1]:29.0
CapID Check Pass:31,Min:0,Max:63
AFC Calibration Failed,Slop:-0.123,min:2.000,max:10.000
Slope=-0.123,min:2.000,max:10.000
Use Default Value=3922
============GSM900 Band=============
First AFC Tracking:i_DAC1 3922
DAC1:3922,gain:25,Frequency offset:-6
FreqErr_norm min:42.75,Read Freq:-42.75
Write AFC offset to NVRAM:-342
FreqErr_norm min:42.75,Read Freq:-3299.61
Write AFC offset to NVRAM:-341
FreqErr_norm min:42.75,Read Freq:-3300.19
Write AFC offset to NVRAM:-340
FreqErr_norm min:42.75,Read Freq:-3303.17
Write AFC offset to NVRAM:-339
FreqErr_norm min:42.75,Read Freq:-3307.56
Write AFC offset to NVRAM:-338
FreqErr_norm min:42.75,Read Freq:-3324.99
Write AFC offset to NVRAM:-337
FreqErr_norm min:42.75,Read Freq:-3400.47
Write AFC offset to NVRAM:-336
FreqErr_norm min:42.75,Read Freq:-3430.95
Write AFC offset to NVRAM:-335
FreqErr_norm min:42.75,Read Freq:-3492.49
Write AFC offset to NVRAM:-334
FreqErr_norm min:42.75,Read Freq:-3479.32
Write AFC offset to NVRAM:-333
Write the min tx afc offset -342 to NVRAM
FreqErr_min:-3479.32,tx_afc_offset_min -342
tx_afc_offset check fail -342,MAX:30,MIN:-30
================== TX AFC offset calibration error =====================
AFC Calibration time=9.09(sec)
##
MTK GSM Test Sequence Demo
-------------------------------
Date : 04-07-2010 Time 14:53:09

------------
ATE Tool Version:5.0820.3
Part Number: TL2008
Serial Number: 000001
Revision: W08.20
Batch: 01
Bar Code: 04070100989
Error Code: 501
------------

===============================
Calibration Total Result FAIL
===============================

##

你的26M晶体用错了吧?slop值不对,你可能是用的6239的晶体啦..哈哈

晶体我已经确定过是AD6548认证过的.TZ1387A

而且我经过测试发现,发射可以通过META测试到(900/1800),功率都够.但用PM测不到接收.
并且AFC的问题SLOP很小.

ate配置问题?

接收通路有问题，我也碰到过

有正确的配置的模板吗?迫切需要，先谢谢了

不好意思，最近我也遇到了这个问题。有没有知道怎么解?MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！, 不好意思，最近我也遇到了这个问题。有没有知道怎么解压?MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！, 不好意思，最近我也遇到了这个问题。有没有知道怎么解压?MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！不过我测试出来的slope值10左右，然后有时候会连不上基站
郁闷中

不好意思，最近我也遇到了这个问题。有没有知道怎么解?MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！, 不好意思，最近我也遇到了这个问题。有没有知道怎么解压?MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！, 不好意思，最近我也遇到了这个问题。有没有知道怎么解压?MT6223D+AD6548+SKY77542，Crystal AFC 误测率高！不过我测试出来的slope值10左右，然后有时候会连不上基站
郁闷中

小弟最近也發現相同問題，AFC slop校準出來都是負值。後來換ATE版本就ok了。具體從MTK_ATE_V6.1124.0 改為 MTK_ATE_V6.1128.0 ，建議也試試不同的版本吧，以上讓大家參考。

重启校准工具就OK了

MTK CrystalCalibration AFC