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Kodi mfundo yanji yogwiritsira ntchito ma radio radio FM?

Digital FM Transmitter ili ndi kusiyana kofunikira kuchokera ku Analog FM Transmitter.

Mwachidule, Analog FM Transmitter imagwiritsa ntchito ukadaulo wamagetsi wa VCO + PLL, koma Digital FM Transmitter imagwiritsa ntchito ukadaulo wa DSP + DDS pulogalamu yaukadaulo yamagetsi, chithunzi chomwe chili pansipa:

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Kugwiritsa ntchito Mfundo:

Digital FM Transmitter imaphatikizapo zigawo 6 za ma module: gawo la Audio Signal Input; Module ya Digital Signal Njira; Digital FM Modulator ndi Band Pass Filter gawo; Linanena bungwe mphamvu zokulitsa ndi otsika pochitika fyuluta; Ma module a Man-Interface & Communication gawo ndi gawo la Power Supply & Circuit.

Audio Signal Input module: Imalandira ma audio a chizindikiro ndi ma audio a digito (AES / EBU). Chowonera audio cha Analog kutembenuza kukhala digito audio kudzera (A / D) chosinthira, kenako DSP. Zomvetsera za digito DSP mwachindunji. DSP idzasankha chizindikiro chomwe chingakhale chizindikiro cha mawu olowera.

Digital Signal process module: Ili ndiye gawo lofunikira mu Exciter / Transmitter, pachimake ndi ntchito yayitali 550MHz digital sign processor (DSP), DSP iyi ikhoza kuwongoleredwa ndi mapulogalamu ndikuwongolera chizindikiro cha digito chofuna kusintha; kusefa kwa digito; kutsimikizira kwa digito; kuyendetsa kwa digito kumachitika; kulemba kwa digito, kenako kupanga ma stereo opangira ma stereo, pambuyo pa ntchito ya masamu, kutuluka kwake kudzasinthidwa kupita ku flowcer baseband flow, ikakhala digito FM flow, sign flow iyi itumizidwa ku 1000MHz Direct Digital Synthesizer (DDS) , kenako kusintha kukhala FM RF Signal.

Digital FM Modulator ndi Band Pass Filter Fulemu: Pakatikati pa chipangizochi ndi Direct Digital Synthesizer (DDS), imalandira uthenga wapa digito wa FM kuchokera ku DSP, kenako ndikupanga chizindikiro cha RF cha digito cha RF kudzera pa chosakanizira chake chamkati. / wotembenuza wa analog atha kupanga analog FM yosinthidwa chizindikiro, pamapeto pake pezani choyera cha FM RF chizindikiro kuchokera ku Band-pass Filter.

Pulogalamu yamagetsi yopanga ndi gawo loyenda loyambira: Chipangizochi chatsekedwa. Itha kuonetsetsa kuti mphamvu yakutulutsa ikukhazikika munthawi yayitali yogwira ntchito.

Ma module a Man-Machine a Refresh & Communication: Chipangizachi chimagwiritsa ntchito System imodzi pa-a-Chip (SOC) pokonza Exhibition / Transmitter Man-Machine Interface; Kutolere deta; Chitetezo cha alamu; Kuyankhulana ndi ntchito zina. Dongosolo lonselo likutsatira batani; LCD chophimba ndi mawonekedwe owonetsera Transmitter Status. Itha kugwiritsa ntchito mawonekedwe a kulumikizana kwa RS232 / RS485 / CAN / TCPIP yolumikizana ndi PC yakutali yoperekera deta komanso kuyang'anira kutali.

Power Supply & Circule module: imapereka mphamvu yokhazikika ya DC yamagetsi pamagawo aliwonse a Transmitter.

Siyani Mumakonda