- 易迪拓培训,专注于微波、射频、天线设计工程师的培养
非利浦方案1900怎么调?
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我目前用的是非利浦5130方案,tranceiver 是3537,PA是BGY502(集成了天线开关)
该方案有两个射频通道,一是低频同道,一是高频通道,目前低频是900,高频是1800.
根据文档,低频也可接850,高频可接1900.
可是它更换了1900的SAW后,接收灵敏度很差,点测只有-75左右。改接受回路能调高2dB,再也调不动了。(注发射功率是正常的,没动发射回路匹配)
不知道各位老大有没有这方面的解决办法?
该方案有两个射频通道,一是低频同道,一是高频通道,目前低频是900,高频是1800.
根据文档,低频也可接850,高频可接1900.
可是它更换了1900的SAW后,接收灵敏度很差,点测只有-75左右。改接受回路能调高2dB,再也调不动了。(注发射功率是正常的,没动发射回路匹配)
不知道各位老大有没有这方面的解决办法?
At first, make sure your Saw filter is OK(soldering, PCB, performance, etc..)!
I have no idea of BGY502, but since it integrates with ASM, the ASM should be of pHEMT process coherent with PA, which generally with no dedicated Rx port for DCS/PCS. So your connection style seems to be OK.
What I am afraid about is timing/switch of the ASM, the ASM may be switched to another port as the default configuration is tri-band; on another word, you need to make sure your FESW configuration in TAT.
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