GPRS test case in FTA

janibo

Does anybody know what's the test configuration of Switching spectrum in GPRS Tx RF performance test? I found it's difficult to ensure the following test can pass FTA requirement.
Issue: not enough margin in switching spectrum in time slot 4 (Gamma 18---0dmB)
slot configuration: 2 uplink slots (main slot is 4, and the other slot is 5)
Slot output power: slot 4: 0dBm; slot 5: 33dBm
Band and channel: PCS band, Channel 810
phenomenon: in channel 810 PCS band,  I test slot 4(0dBm output power) switching spectrum and set slot 5 at maximum output power, the switching spectrum margin is not enough in normal condition.
Question:
1: If FTA require this kind of test case(0dBm at main slot and maximum output power at adjacent time slot )???
2: Anybody can tell me the reason or tell me how to solve it? need I adjust the timing???
Thanks a lot!!
[em09][em09]

cylbailey

Hi:
   FTA does this test, in those maximun PCL variation.

cylbailey

solution:  
1:Tuning ramping cofficient may works.
2:Add a LC notch after PA output may works too(from a certain solution)
3:Proper layout is certainly needed.[br]<p align=right><font color=red>+3 RD币</font></p>