74 lines
1.6 KiB
Markdown
74 lines
1.6 KiB
Markdown
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---
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title: RSA306B
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updated: 2022-09-02 06:11:52Z
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created: 2022-01-08 13:18:07Z
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tags:
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- saw
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- 混频
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- 滤波器
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- 选型
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- 频谱仪
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---
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# ADC
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ADC使用LTC2261，采样时钟112MHz，采样率112 Ms/s, 14 bits（实时模式为112 Ms/s, 16-bit integer real samples）
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# FPGA
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FPGA使用XILINIX的XC6SLX25
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# 控制接口
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USB3.0接口芯片采用CYUSB3014-BZX
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# 参考
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参考输入拓扑为ADF4001+ABLJ0-V-112MHz
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# 混频
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一混频 有源混频器LTC5510+本振MAX2870
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二混频 有源混频器AD8343+本振ADF4360-1
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高段采用数字VGA ADL5201
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低段采用数字VGA AD8370
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# 中频
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中频140MHz，带宽40MHz（40 MHz BW, 28 ±0.25 MHz Digital IF），选用SAW为TFS-140AU
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一中频2440/1190（2440为WIFI，1190为GPS，均有可用SAW）
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二~~中频~~本振2300/1050
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# 预选器
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预选切换用开关为MASW-007107（==丝印09C==），此IC低端插损大（可补偿放大器低端高增益带来的波动）
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频率分段（推断）：
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低段（LF）：<22MHz
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高段（RF）：>22MHz
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Technical Reference（**RSA306B Specifications and Performance Verification.pdf**）里有详细分段及频率调谐表：
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# 其它
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## 2021.06
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咸鱼有个泡水款RSA306，价格4k5，略有心动，但是风险不低
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主要器件无锈蚀，但是PCB安装孔与盒体固定柱相连，后者腐蚀严重，担心过孔附近内层走线存在隐患
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从给的图中就发现预放的偏置电感掉件了，反馈后卖家找了一个换上
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## 2021.11
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已下架，估计是卖掉了
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#选型
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#频谱仪
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#混频
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#saw
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#滤波器
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