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bombs295
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注册时间:2022/5/26 15:23:18
最后活动:
2年6个月前
射频
测距开发,半路入行,但最终方案还算给力
ROHDE & SCHWARZ ESH3测试接收机重建/维修
西葫芦
2年0个月前
回复于
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拆机鉴赏
文献情报博物馆
内容:ESVP也是双环路合成器,内环(低频环)相噪高得离谱,
射频
好像也有一些假响应问题没排除。
东亚DSM-8541四通道超级大电阻/超微电流计拆解
huojunan2
10年2个月前
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拆机鉴赏
内容:这样能得到工作频率很高的
射频
开关。,咱当年DIY
射频
开关阵列,就用的这个办法。,老大关于那个
射频
开关能上个示意图么?
东亚DSM-8541四通道超级大电阻/超微电流计拆解
hambaby
10年2个月前
回复于
仪器仪表
拆机鉴赏
内容:这样能得到工作频率很高的
射频
开关。,咱当年DIY
射频
开关阵列,就用的这个办法。
东亚DSM-8541四通道超级大电阻/超微电流计拆解
虎哥
10年2个月前
回复于
仪器仪表
拆机鉴赏
内容:这样能得到工作频率很高的
射频
开关。,咱当年DIY
射频
开关阵列,就用的这个办法。
KC951021 RF Demo Kit 网络分析演示套件
kcma
5年5个月前
发表于
仪器仪表
会员海报
内容:KC951021 RF Demo Kit 是一个专为
射频
网络分析学习者设计的演示套件,它包含了16种
射频
电路,其中单端口网络11种,双端口网络5种。,校准件回波损耗:优于 20dB ( <2.5GHz)优于 10dB (2.5GHz – 7GHz)在网络分析仪上设定好测量频率范围,使用UFL电缆连接网络分析仪至Demokit上的校准器进行校准,随后即可进行
射频
网络测量实验
時代の風 :icom IC-751A的收发电路分析(多图)
xiaopoorhair
5年9个月前
回复于
电子技术
无线电
拆机鉴赏
内容:测量末级功放的直流输入功率远比测量
射频
输出功率容易。
拆【安利MH648A】前置放大器
张静茹
10年1个月前
回复于
仪器仪表
拆机鉴赏
内容:1.3G还直流呀,多高算
射频
呢?
行波管放大器 应用电路求助
GiroPetrenko
5年4个月前
发表于
EMP和强微波
内容:这是一个典型行波管的模型,调制后的
射频
输入由“
射频
输入”端输入,由 “
射频
输出”端输出。,问题来了:(部分图片来自淘宝)这是我计划使用的B-1A型行波管问题1:
射频
输入/输出的波导在哪?
便携式监测接收机-罗德与施瓦茨RS-EB200和ESMB拆解欣赏
虎哥
6年3个月前
发表于
仪器仪表
拆机鉴赏
内容:拆掉面板 面板后部细节 液晶的背光还采用荧光灯管,高压部分单独屏蔽 中间段采用总线插板结构 这看起来是电源部分 喇叭很大,声音非常洪亮 尾部的接线 分离尾部 分离主控部分 分离
射频
和DSP部分插板支架,
射频
和数字部分总共3层,部分层有两张板。 ,从另一个角度看 取下
射频
中端部分 另一面,可见由两张电路板,三块屏蔽组成三明治结构 拆掉屏蔽 屏蔽的内部 屏蔽细节
射频
部分概览,显示一本振、一中频部分 另一个角度 细节。,板间屏蔽,可见板间
射频
连接器 预选器模组 另一面 可见分为6段滤波,其中有4段采用电调谐滤波器。 ,中部,集总滤波器的
射频
线路在板子内部,看起来这是6层板,其中4层
射频
材料,两层FR4类型的材料。
【更新收发通道拆解】初步测量并拆解了一台有趣的便携电台
极速外卖
4年2个月前
发表于
无线电
内容:(W)/直流耗散功率(W)*100%*测试设备、电台开机预热时间:45分钟测量结果:接收状态电流(16V)1号机2号机 1.8M发
射频
谱、电流3.5M发
射频
谱、电流2号机5M发
射频
谱、电流2,号机7M发
射频
谱、电流2号机10M发
射频
谱、电流2号机光标读出的二次谐波功率为(-0.15dBm+30dB)= 966mW10M发
射频
谱(近端细节)14M发
射频
谱、电流2号机18M发
射频
谱、电流2号机21M,发
射频
谱、电流24M发
射频
谱、电流29M发
射频
谱、电流51M发
射频
谱、电流12.144M发
射频
谱、电流2号机12.430M发
射频
谱、电流2号机今天吃饭看到好多人在说功耗的事情,干脆Excel做个表(2020.09.21,)取下底部四颗螺丝后,即可抽出机型,看到黑色的顶部逻辑板从侧面窥探一下内部结构取下逻辑单元(多达七根排线),即可看到
射频
部分密密麻麻的一团团
射频
跳线和一块块模块化电路。,-前放或直通电路--
射频
单刀双掷开关-一堆PE42641单刀四掷
射频
开关-一堆带通滤波器-MSI001-接收IQ通道的双运放接收通道条右下角看起来是控制SP4T(PE42641)的PCA9555(I2C
东亚DSM-8541四通道超级大电阻/超微电流计拆解
古人
10年2个月前
回复于
仪器仪表
拆机鉴赏
内容:引用 huojunan2:老大关于那个
射频
开关能上个示意图么?,如果是
射频
开关的话,铜管接屏蔽就行了。
拆一个mini-circuits的zb3pd系列的有源功分器
iffi123
3年6个月前
回复于
无线电
拆机鉴赏
内容:
射频
电路,有的铺铜,有的不铺,什么讲究?
HP8565EC频谱仪的内部图
虎哥
3年2个月前
发表于
拆机鉴赏
仪器仪表
内容:这是
射频
部分,由于修建得过于难拆,就不拆了。,
射频
后级/中频和数字部分占了大约6张PCB,叠在一起。,屏蔽做得比较用心偶然发现
射频
后级板上有个钽电容烧黑了。
考古:HP5351B微波频率计拆解
hackboymzw
6年9个月前
回复于
仪器仪表
拆机鉴赏
内容:图片看着真过瘾,能不能透露下多少收的呀😀不知道那个原装的
射频
接头有什么讲究。
NI PXIe-5644R矢量收发信机折腾小记
qiuzheru1
6个月7天前
回复于
仪器仪表
拆机鉴赏
内容:采样率,动态范围还有其他
射频
性能应该还是优于一般的9361方案的。
450元入手的美国小台表,拆机看看
阡陌徘徊
9年1个月前
回复于
仪器仪表
拆机鉴赏
内容:避免
射频
信号反射才是高频走45的原因
【已更新接收测试】两款“多波段+全模式”电台收发性能横向对比
极速外卖
4年2个月前
发表于
无线电
内容: Q900 1.8MHz发
射频
谱 FT818 3.5MHz发
射频
谱 Q900 3.5MHz发
射频
谱 FT818 5MHz发
射频
谱 Q900 5MHz发
射频
谱 FT818, 7MHz发
射频
谱 Q900 7MHz发
射频
谱 FT818 10MHz发
射频
谱 Q900 10MHz发
射频
谱 FT818 14MHz发
射频
谱 Q900 14MHz,发
射频
谱 FT818 14MHz发
射频
谱 Q900 18MHz发
射频
谱 FT818 21MHz发
射频
谱 Q900 21MHz发
射频
谱 FT818 24MHz发
射频
谱, Q900 24MHz发
射频
谱 FT818 28MHz发
射频
谱 Q900 28MHz发
射频
谱 FT818 50MHz发
射频
谱 Q900 50MHz发
射频
谱 FT818,144MHz发
射频
谱 Q900 144MHz发
射频
谱 FT818 430MHz发
射频
谱 Q900 430MHz发
射频
谱 发射相噪、频率准确度测试(发射电性能测试
拆【安利MH648A】前置放大器
RodTech
10年1个月前
发表于
仪器仪表
拆机鉴赏
内容:翻出来一个pre amp,0.1MHz-1300MHz,30dB增益 线性电源部分很简单,已经跳线改成220V,测得输出17.8V 由于1.3GHz太低,对于
射频
工程师来说简直是直流,所以没有见到
拆解HP5071A型铯原子钟(多图)
虎哥
12年5个月前
回复于
电子技术
拆机鉴赏
内容:
射频
拆【安利MH648A】前置放大器
RodTech
10年1个月前
回复于
仪器仪表
拆机鉴赏
内容:引用 张静茹:1.3G还直流呀,多高算
射频
呢?
拆 CUBIC R-2411/U 短波 电子战 接收机
RodTech
8年1个月前
发表于
仪器仪表
拆机鉴赏
内容:拆开,感觉该公司结构工程师比
射频
工程师人数还多。。。。
【拆机欣赏】惠普/安捷伦驻波电桥的内部结构
虎哥
9年11个月前
回复于
仪器仪表
拆机鉴赏
内容:那个不是旋钮,就是一个APC-7的
射频
连接器。
時代の風 :icom IC-751A的收发电路分析(多图)
极速外卖
6年2个月前
发表于
电子技术
无线电
拆机鉴赏
内容:一、751A的接收信号通路分析 1.1 RF UNIT 14MHz的
射频
信号经过ANT接口送入后,首先经过收发转换单元的收发切换继电器切换并经过1.6MHz高通滤波器送到RF UNIT上预选滤波器阵列对应的,功率放大器单元第一级是由一只2SC1971构成的A类功率放大器,作为前置驱动放大器将百毫瓦级的
射频
功率放大到瓦特级别。,经过由宽带
射频
变压器构成的级间耦合电路驱动由两只2SC3133构成的B类推挽功率放大器,这一级驱动放大器再提供数瓦的
射频
功率以驱动由两片2SC2904构成的B类推挽末级功率放大器,得到上百瓦特的
射频
功率,751A的
射频
功率放大器单元电路板(PA UNIT),可以喜感地看到
射频
变压器的体积随着耐受功率要求提高而逐级增大。,电路板上黑色的磁珠不仅呈电感性,还具有一定的
射频
信号吸收能力,串接在连接器与机内电路之间用以滤除干扰。
[绿色化学][文献]高效率电弧法固氮的探索实验
虎哥
2个月6天前
回复于
化工矿冶
内容:首先没有人执着于(似乎意思是偏执于)
射频
或微波等离子体。,当然它的效率不一定有优势,毕竟把电转换为
射频
,如果考虑到寿命而使用半导体的话,目前最高的效率也只有70%左右。,同时它的成本较高,毕竟
射频
器件较贵。
半导体固态微波源不明原因炸管,风景秀丽
改装pcp
4年10个月前
回复于
EMP和强微波
内容:估计是过压了,以前激活
射频
激光,加载130%电压,不到5分钟就挂了
射频
管了。
简单拆解罗德施瓦茨xk2900L短波发射机的接收和激励部分
苦丁茶
4年7个月前
发表于
拆机鉴赏
内容:由于螺丝太多,只拆卸
射频
收发相关的模块。,先用它听广播试试,支持多种解调方式打开外壳的样子,空荡荡的中频和音频板
射频
板,看起来很稀疏没几个零件拆完了,继续听广播
HP85027E 26.5GHz标网电桥拆解
FU106Z
5个月26天前
回复于
仪器仪表
拆机鉴赏
内容:二极管两端是两个楔形的薄膜电阻,阻值应该能达到数百欧,足以隔绝
射频
信号。
【项目终止】基于ADF4351与AD8319的手持射频信号源/功率计
GiroPetrenko
2年6个月前
回复于
仪器仪表
电子技术
内容: 想玩
射频
试试FMCW(
450元入手的美国小台表,拆机看看
gmcg
9年1个月前
回复于
仪器仪表
拆机鉴赏
内容:避免
射频
信号反射才是高频走45的原因 对,直角看用在什么频段上的电路了,低频直流就一点影响都没了
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