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约找到 1041 条结果,耗时 0.224 秒
求教:ITF声表滤波器IN、OUT可以反接使用吗
yaozhiyu
9年3个月前
发表于
无线电
内容:刷了固件,基带部分还没通,现在在调,但在看原理图时发现,里面有一只高通和一只低通的滤波器(U8、U3),在发送和接收时信号穿过的方向是相反的,发送时信号是从IN入OUT出,接收时是从OUT进IN出,请问哪位
射频
高手
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射频
电路吗 没查到参数在里面,难拍,要拆散才能拍到。
DIY简易版市电半桥电磁炉
ehco
14年3个月前
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高电压技术
内容:价格决定材质 国产大量NXO 和TDK的
射频
磁芯,价格悬殊几十倍 效果也。。
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14年4个月前
回复于
电子技术
内容:MOS 结电容也不小,如果用
射频
用的MOS 的导通阈值都比较低。
三菱的功放管,有些不懂的问问大家
阮洪文
6年6个月前
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电子技术
内容:建议楼主听从虎哥的建议,好好看看
射频
放大器的几种类型,看明白,不懂就问,但是需要先看书,再问人。
频率无法测量的奇怪现象
S.D.P
12年5个月前
发表于
电子技术
内容:拿出频率计,想试试机器的发
射频
率。,3:我的频率计是台式的多功能频率计,不是专用的
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频率计,造成了一些我分析不出来的问题。
使用ADI的RF DAC制作高端无线军用干扰机
雪馒头
3年8个月前
回复于
无线电
内容:后面的板子都会算好
射频
网络的阻抗。,是还要加深
射频
相关的知识,关于线路匹配还有很多不太懂。
关于RF、矢量测量技术的疑问及解答
虎哥
9年8个月前
回复于
仪器仪表
内容:仪器偏计量一些,对
射频
的理解是比较局限的。
新人做sgtc,希望大家支持一下
超密度氢
3年9个月前
回复于
高电压技术
内容:质谱仪上的
射频
电源变压器线圈就是用利兹线频率1到几个MHZ
回 16楼(cccyl) 的帖子
sumperqq
11年5个月前
回复于
电子技术
内容:主要是能检测到
射频
的信号,然后能给单片机反馈一个信号就行了。
回 7楼(samhrc) 的帖子
北落师门
12年4个月前
回复于
电子技术
内容:
射频
的东西完全不懂哎.....网上是有搜到过类似外形的东西,貌似还跟衰减搭上边了
海量清仓处理,有盖格管、正比计数器、音频分析仪、电源等--活动已结束,请勿再汇款
ygd8718
11年3个月前
回复于
跳蚤市场
内容:虎哥 发表于 2013-9-20 01:02 22-功放 这是一台100W
射频
功放,频率可能是200M的。
海量清仓处理,有盖格管、正比计数器、音频分析仪、电源等--活动已结束,请勿再汇款
ygd8718
11年3个月前
回复于
跳蚤市场
内容:虎哥 发表于 2013-9-20 01:02 22-功放 这是一台100W
射频
功放,频率可能是200M的。
一个变态的无线电爱好者要看这些书 zt
LED
8年7个月前
回复于
无线电
内容:应该看物理(电磁学),电路原理,信号与系统,电磁场与微波,
射频
电路,通信原理,软件工程基础…… 一楼的书,基本上是给半路出家的玩家看的。
(画大饼)如果打算自己做SDR接收机器的话,如何选择ADC
warmonkey
7年10个月前
回复于
无线电
内容:再要更便宜,可能得找手机的
射频
IC才行。
无线通信系统中的调制解调基础
mass_lynnxy
16年3个月前
发表于
电子技术
内容:第三部分讨论扩频通信技术,包括被广泛应用的直接序列扩频通信(DSSS),和正交频分复用(OFDM)
射频
信号被用来传递信息,信息有可能是音频,数据或者其他格式,该信息被调制(modulate)到载波信号上,,并通过
射频
传送到接收器,在接收器端,信息从载波上分离出来,这个被称为解调(demodulation)。
拆了个5kw的开关电源 有铜排磁芯 便宜处理给坛友
bg3qai
9年4个月前
回复于
跳蚤市场
内容:另外
射频
电源也出 13.56兆赫 3kw TH430 16管8板合成 有喜欢玩等离子喷涂 镀膜的朋友可以联系我
怎么没有搞微波射频技术的呢???
拔刀斋
13年11个月前
回复于
电子技术
内容:微波
射频
电路对理论基础和测量仪器要求都很高,除非只用微波炉磁控管搞电磁污染
高压电源和灯泡这样子接会不会亮呢?
找自己
11年1个月前
回复于
高电压技术
内容:la45088d1 发表于 2013-11-23 14:32 如果是
射频
能量够高,手电筒的灯珠也会亮了小心DD
RF-DRPSSTC 桌面级射频磁暴线圈 V1.0
sukeytang
14年1个月前
回复于
高电压技术
内容:这个次极真够迷你了,对高次谐波波形很感兴趣,可以做成
射频
武器了。
回 6楼(牛逼大仙) 的帖子
孤独的酒精灯
12年1个月前
回复于
极客DIY
内容:其实现在已经在向类似的方向发展了……只是不知道里面有没有
射频
元件 传说中的eID……
Re:回 5楼(硝化咸鱼) 的帖子
硝化咸鱼
13年6个月前
回复于
电子技术
内容:再低也没用的...别说摆在电台旁边 只要楼顶上有条天线 一发射这玩意儿绝对响...不用大功率电台 小功率我估计也差不多
射频
泄露是肯定存在的 机器 馈线 接头都有可能有
射频
泄露 那一点点能量就行了
拆一台罗德施瓦茨空管电台xu250a
虎哥
3年7个月前
回复于
拆机鉴赏
内容:他的接收第一混频之前没有前放还是那两个小三极管就是前放,还有发
射频
合器一大串拨码开关是干什么用的?
射频仪器三大件的产品趋势探讨
bh4ilp
2年11个月前
回复于
仪器仪表
内容:对于带面板的仪表发展趋势现在的中高端倾向于多合一然后卖高价卖选件,比如pna-x就把几乎所有
射频
测试功能都塞进去了,但是价格也上天了,中端的5081啥的也是在讲一机多能。
双十一活动,大幅度降价出一大批物品,不买也来看看
改装pcp
8年1个月前
发表于
跳蚤市场
内容:XXXXXXXXXXXXXXXXXXXXXXXX/t/80676100多斤的进口
射频
激光标签功率700瓦,3800元!!!,XXXXXXXXXXXXXXXXXXXXXXXX/t/80418AE大功率
射频
电源PDX2500,1500元。
回 26楼(glytaobao) 的帖子
拔刀斋
11年9个月前
回复于
跳蚤市场
内容:可以这样做阻抗匹配,原理跟
射频
阻抗匹配一样不过感应加热这样做功率元件多、成本高,实际用变压器做阻抗匹配较常见
【KS-5C】第一部分 扫频信号源 介绍以及实现
GiroPetrenko
4年7个月前
回复于
极客DIY
电子技术
内容:
射频
前端,RFSA2033提供-30dB~-1dB的衰减,两级LHA-1+提供+18dB的增益。
海量清仓处理,有盖格管、正比计数器、音频分析仪、电源等--活动已结束,请勿再汇款
虎哥
11年4个月前
回复于
跳蚤市场
内容:10-基站的
射频
板 上面应该有点VCO混频器之类可以利用。
新坑:基于AD9361的手持监测侦察接收机
虎哥
7年3个月前
回复于
无线电
内容:电池电压直通是为
射频
功率放大器预留的。
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