Select installation and then antenna setting , and set respectively the local oscillator frequencies of the high - frequency tuner of 146 , 138ku , 138c band and so on 選擇安裝里的天線設(shè)定,分別設(shè)置146 、 138ku及138c波段等等的高頻頭本振頻率。
A design and implementation of an intelligent , 1ghz scalar , network analyzer are described in the paper , which is particularly designed for the high frequency tuner 本文介紹了一種智能化的標(biāo)量網(wǎng)絡(luò)分析儀,詳細(xì)敘述了該系統(tǒng)的硬件設(shè)計(jì)和軟件設(shè)計(jì)。
The 16 - bit adcs inside the single - chip microcomputer are used in the instrument to measure the output signal of the high frequency tuner , two12 - bit dacs are used to give the control signal needed by programmable gain amplifier . the system has the characteristics such as light volume , light weight , and low cost , which make it more applicable 該標(biāo)量網(wǎng)絡(luò)分析儀能方便地測(cè)試一個(gè)系統(tǒng)的傳輸特性和反射特性,與pc機(jī)通過(guò)通用串行總線( usb )連接,實(shí)現(xiàn)被測(cè)網(wǎng)絡(luò)頻率特性的圖形顯示、保存、打印及參數(shù)設(shè)置功能。
The leading product has the automobile sound coupling , theautomobile antenna plug , meets the plug - in unit , the electronicelectric appliance group of lines , f plug ( high frequency tuner ) , lightly touches the switch , the loudspeaker wiring column , the powerswitch , the earphone receptacle and so on , the product widely appliesto the vehicle carries the video and music , dvb domain and so onbox , domestic electric appliances , computer , automobile , communicationequipment 主導(dǎo)產(chǎn)品有汽車音響連接器、汽車天線插座、接插件、電子電器線束、 f頭插座(高頻頭) 、輕觸開關(guān)、喇叭接線柱、電源開關(guān)、耳機(jī)插口等,產(chǎn)品廣泛應(yīng)用于車載影音、機(jī)頂盒、家用電器、計(jì)算機(jī)、汽車、通訊設(shè)備等領(lǐng)域。
By using single - chip microcomputer c8051f060 and dds ad9852 , the instrument is easy to measure the transport characteristic of the high frequency tuner . by using c8051f060 to control dds chip ad9852 , a signal with high resolution , high transferring speed and pure spectrum is obtained . the output frequency range is up to 1000mhz . the system can give the frequency characteristic drawing of the high frequency tuner by connecting pc with usb 采用cygnal公司的專利cip51微處理器內(nèi)核的c8051f060單片機(jī)作為控制器,使用鎖相環(huán)+直接數(shù)字合成+下變頻的方法構(gòu)成掃頻信號(hào)源,用直接數(shù)字頻率合成( dds )芯片ad9852實(shí)現(xiàn)掃頻信號(hào)的控制,產(chǎn)生測(cè)量用的掃頻信號(hào)的范圍為1 ~ 1000mhz 。