初学菜鸟虚心请教几个问题..请大家帮忙~~谢谢

fredcai · 发表于 2007-2-1 09:06:08

有4个问题...我拿mtk校准软件校准扳子......有2个地方没过FT....
1..    class II class lb                   请问这2个是什么 ??
2.... 在CMU200 BS中设置的 Level -85.0 dbm 是不是输入电平 ?
            TCH level -60 dbm(used) -20.0 dbm(unsed) 是什么意思?
3.. 在信号接通以后,  那个时间提前量误差 ---- 到底测的是什么???
4.    在开关频谱那里....显示的Ref power 是什么概念 ???

问的有点多了.....但真的好想知道.......
请知道老鸟多多点拨2下....谢谢大家~~!!    谢谢斑主~~!!
还有下面的MTK校准工具里面META里的代码.........不太懂.....请高手帮忙解释下
-----------------------------------------------------------------------------------------------------------
[CMU200 Initialization]
CMU200 GPIB Address = GPIB0::20::INSTR
Time Out = 5000
GSM900 input cable loss = 1.2
DCS1800 input cable loss = 1.3
GSM900 output cable loss = 1.2
DCS1800 output cable loss = 1.3                      这个是不是900和1800的RF线损???
-------------------------------------------------------------------------------------------------------------
[AFC Calibration]
AFC_BAND = GSM
AFC_ARFCN = 70
N_AFC = 10
DAC1 = 4000
DAC2 = 5000                   GSM900 功率等级为10 信道为70  DAC1和DAC2 是什么 ??
-----------------------------------------------------------------------------------------------------------
[Crystal AFC Calibration]
CRYSTAL_AFC_BAND = GSM
CRYSTAL_AFC_ARFCN = 65
CRYSTAL_AFC_PCL = 12
CRYSTAL_AFC_GSM850_PCL = 12
CRYSTAL_AFC_GSM900_PCL = 12
CRYSTAL_AFC_DCS1800_PCL = 12
CRYSTAL_AFC_PCS1900_PCL = 12
CAL_DAC = 4100
MIN_CHECK_DAC = 0
MAX_CHECK_DAC = 8000
MIN_FREQUENCY_ERROR_PPM = -17.0
MAX_FREQUENCY_ERROR_PPM = 17.0                      这一块说的又是什么呢?
----------------------------------------------------------------------------------------------------------------
[RX path loss table] 这个是线损 ??如果校准时说pathloss错误,就改这里么?为什么是12个值
GSM900_MAX_RX_LOSS = "5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,"
GSM900_MIN_RX_LOSS = "-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,"
--------------------------------------------------------------------------------------------------------------
[AFC table]
MAX_INIT_AFC_DAC = 7000
MIN_INIT_AFC_DAC = 2000
MAX_AFC_SLOPE = 4.0
MIN_AFC_SLOPE = 1.0                   这个完全不知道什么意思?  5555555
---------------------------------------------------------------------------------------------------------------
[TX PCL table]
GSM900_CAL_PCL = 17,12,5,
GSM900_2CAL_PCL = 12,5,
GSM900_PCL = 19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,
GSM900_CHECK_PCL = 19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,
GSM900_MAX_P = 7.1,9.0,10.9,12.9,14.2,16.2,18.2,20.2,22.2,24.2,26.1,28.5,29.8,31.2,32.8,
GSM900_WANTED_P = 3.2,6.3,8.5,10.5,13,15,17,19,21,23,25,27,29,30.5,32.2,
GSM900_MIN_P = 3.2,5.6,7.1,9.2,12.2,14.2,16.2,18.2,20.2,22.2,24.2,26.2,28.1,29.5,31.0
GSM900_C = 3,3,3,3,4,4,6,6,8,8,12,12,15,15,35,40,
GSM900_CORRECTION = "-3.2,-3.3,-0.8,-0.8,-0.8,-0.5,-0.8,-0.8,-0.8,0.8,0.8,0.0,0.0,0.0,0.0,"                         貌似能看懂一点.....虚心请教~~~~~~!
-----------------------------------------------------------------------------------------------------------
[Phase error table]
PHASE_ERROR_BAND = 0
PHASE_ERROR_ARFCN = 70
PHASE_ERROR_PCL = 10
PHASE_ERROR_RMS_ERROR = 1.5             相位误差有效值1.5度  不是2度么?
---------------------------------------------------------------------------------------------------------------

fredcai · 发表于 2007-2-1 09:06:08

有4个问题...我拿mtk校准软件校准扳子......有2个地方没过FT....
1..    class II class lb                   请问这2个是什么 ??
2.... 在CMU200 BS中设置的 Level -85.0 dbm 是不是输入电平 ?
            TCH level -60 dbm(used) -20.0 dbm(unsed) 是什么意思?
3.. 在信号接通以后,  那个时间提前量误差 ---- 到底测的是什么???
4.    在开关频谱那里....显示的Ref power 是什么概念 ???

问的有点多了.....但真的好想知道.......
请知道老鸟多多点拨2下....谢谢大家~~!!    谢谢斑主~~!!
还有下面的MTK校准工具里面META里的代码.........不太懂.....请高手帮忙解释下
-----------------------------------------------------------------------------------------------------------
[CMU200 Initialization]
CMU200 GPIB Address = GPIB0::20::INSTR
Time Out = 5000
GSM900 input cable loss = 1.2
DCS1800 input cable loss = 1.3
GSM900 output cable loss = 1.2
DCS1800 output cable loss = 1.3                      这个是不是900和1800的RF线损???
-------------------------------------------------------------------------------------------------------------
[AFC Calibration]
AFC_BAND = GSM
AFC_ARFCN = 70
N_AFC = 10
DAC1 = 4000
DAC2 = 5000                   GSM900 功率等级为10 信道为70  DAC1和DAC2 是什么 ??
-----------------------------------------------------------------------------------------------------------
[Crystal AFC Calibration]
CRYSTAL_AFC_BAND = GSM
CRYSTAL_AFC_ARFCN = 65
CRYSTAL_AFC_PCL = 12
CRYSTAL_AFC_GSM850_PCL = 12
CRYSTAL_AFC_GSM900_PCL = 12
CRYSTAL_AFC_DCS1800_PCL = 12
CRYSTAL_AFC_PCS1900_PCL = 12
CAL_DAC = 4100
MIN_CHECK_DAC = 0
MAX_CHECK_DAC = 8000
MIN_FREQUENCY_ERROR_PPM = -17.0
MAX_FREQUENCY_ERROR_PPM = 17.0                      这一块说的又是什么呢?
----------------------------------------------------------------------------------------------------------------
[RX path loss table] 这个是线损 ??如果校准时说pathloss错误,就改这里么?为什么是12个值
GSM900_MAX_RX_LOSS = "5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,5.0,"
GSM900_MIN_RX_LOSS = "-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,-4.0,"
--------------------------------------------------------------------------------------------------------------
[AFC table]
MAX_INIT_AFC_DAC = 7000
MIN_INIT_AFC_DAC = 2000
MAX_AFC_SLOPE = 4.0
MIN_AFC_SLOPE = 1.0                   这个完全不知道什么意思?  5555555
---------------------------------------------------------------------------------------------------------------
[TX PCL table]
GSM900_CAL_PCL = 17,12,5,
GSM900_2CAL_PCL = 12,5,
GSM900_PCL = 19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,
GSM900_CHECK_PCL = 19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,
GSM900_MAX_P = 7.1,9.0,10.9,12.9,14.2,16.2,18.2,20.2,22.2,24.2,26.1,28.5,29.8,31.2,32.8,
GSM900_WANTED_P = 3.2,6.3,8.5,10.5,13,15,17,19,21,23,25,27,29,30.5,32.2,
GSM900_MIN_P = 3.2,5.6,7.1,9.2,12.2,14.2,16.2,18.2,20.2,22.2,24.2,26.2,28.1,29.5,31.0
GSM900_C = 3,3,3,3,4,4,6,6,8,8,12,12,15,15,35,40,
GSM900_CORRECTION = "-3.2,-3.3,-0.8,-0.8,-0.8,-0.5,-0.8,-0.8,-0.8,0.8,0.8,0.0,0.0,0.0,0.0,"                         貌似能看懂一点.....虚心请教~~~~~~!
-----------------------------------------------------------------------------------------------------------
[Phase error table]
PHASE_ERROR_BAND = 0
PHASE_ERROR_ARFCN = 70
PHASE_ERROR_PCL = 10
PHASE_ERROR_RMS_ERROR = 1.5             相位误差有效值1.5度  不是2度么?
---------------------------------------------------------------------------------------------------------------

yatelandis · 发表于 2007-2-2 07:51:47

class II class lb 是GSM的编码 重要的,次重要的,不重要的三类,查查GSM编码就可以找到
在CMU200 BS中设置的 Level -85.0 dbm 这是BS的广播信道的发射功率
TCH level -60 dbm(used) -20.0 dbm(unsed) 这个没注意过,应该是used 功率比较大吧,used是该BS在业务信道向该MS占用的时隙发送的功率,unsed是另外的7个时隙.
在信号接通以后, 那个时间提前量误差检测MS和BS之间的距离的,最大是63,这样可以计算出来GSM小区的最大范围是35KM.
在开关频谱那里....显示的Ref power 是什么概念 ??? 前几天2个高手在本论坛讨论开关谱的定义,你可以查查
上边是个人理解,如有不正确的请大家指正!谢谢[br]+1 RD币

kusper · 发表于 2007-2-2 16:11:59

DAC1和DAC2是数字模拟转换，模拟校准电压的范围的上限和下限．[br]+1 RD币

yatelandis · 发表于 2007-2-2 07:51:47

class II class lb 是GSM的编码 重要的,次重要的,不重要的三类,查查GSM编码就可以找到
在CMU200 BS中设置的 Level -85.0 dbm 这是BS的广播信道的发射功率
TCH level -60 dbm(used) -20.0 dbm(unsed) 这个没注意过,应该是used 功率比较大吧,used是该BS在业务信道向该MS占用的时隙发送的功率,unsed是另外的7个时隙.
在信号接通以后, 那个时间提前量误差检测MS和BS之间的距离的,最大是63,这样可以计算出来GSM小区的最大范围是35KM.
在开关频谱那里....显示的Ref power 是什么概念 ??? 前几天2个高手在本论坛讨论开关谱的定义,你可以查查
上边是个人理解,如有不正确的请大家指正!谢谢[br]+1 RD币

kusper · 发表于 2007-2-2 16:11:59

DAC1和DAC2是数字模拟转换，模拟校准电压的范围的上限和下限．[br]+1 RD币

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