求助：tx noise in rx band仪器设置
目前小弟用的是average的检波方式以及trace average
请问各位大虾，协议中是否有地方明确说明该测试项的设置方式，谢谢
怎么还是没有回帖?
真的很希望得到大家的帮助，
希望大家一起讨论一下关于这个指标。
自己顶起
11.8. Spurious emissions in the MS receive band
(REC 51.010 § 13.4; REC 45.005 § 4.3)
Measurements : under normal conditions
With a notch filter centered on TX middle Frequency.
Resolution bandwidth : 100 kHz
Video bandwidth : 100 kHz
Span 0 Hz
Average over 50 bursts ; External trigger
Middle channel at Pmax
In band 925-960 MHz by step of 200 kHz
In band 1805-1880 MHz by step of 200 kHz
In band 1930-1990 MHz by step of 200 kHz
The spectrum generated by at least 40 of the bits from 87 to 132
of the burst is the only spectrum measured
Band Frequency band Level ( dBm)
E-GSM 925 to 935 MHz -67
GSM & E-GSM 935 to 960 MHz -79
DCS 1805 to 1880 MHz -71
PCS 1930 to 1990 MHz -71
Exception :
• 5 measurements in E-GSM band are allowed if the level is lower than -36 dBm
• 5 measurements in DCS band are allowed if the level is lower than -36 dBm
• 5 measurements in PCS band are allowed if the level is lower than -36 dBm
thanks
but how about detector and trace method.
now i have set rms detector and trace average
and i can not find the explain in protocol.
thanks again
Average over 50 bursts ; External trigger
和调制谱测试是一样的。
首先感谢paoloday和小编大人，
外部加trigger以及取50个bursts来统计，这些我是明白的。
不过，频谱仪的trace设置方式，以及检波方式，我还是不太清楚。
Average over 50 bursts 是否意味着检波方式使用平均
其实最不确定的还是trace方式，max hold 和average差别挺大的。
经过问了很多高手，都推荐使用average测这个指标，但是协议看了很多遍，我还是没能理解
协议什么地方提到这个设置
问题可能比较弱，不过还是期待各位老大给与正解，谢谢
用average;sweep count 50次;200KHz步进,一个一个点看过去.
测量每个burst 87到132bit. 每个频段允许有5个点FAIL
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