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Molao-motheo o sebetsang oa transmitter ea radio ea Lesedi la FM?

Digital FM Transmitter e na le phapang ea bohlokoa ho tloha Analog FM Transmitter.

Ka bokhutšoanyane, Analog FM Transmitter e sebelisa theknoloji ea analog ea VCO + PLL, empa Digital FM Transmitter e sebelisa maqhubu a DSP + DDS software e se nang mohala ea radio ea dijithale, setšoantšo se hlalosang ka tlase:

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Molao-motheo oa ho sebetsa:

Digital FM Transmitter e kenyelletsa likarolo tsa 6 tsa module: Mojuli oa Signal Input Inamo; Module ea Digital Signal process; Digital module ea Digital FM le mojaro oa Band Pass Filter; Outset motlakase o hlahisang motlakase le mochini o hlahisang motlakase o tlase; Mochini oa mochine oa mananeo a pakeng tsa mochini oa batho le puisano le mochini oa Phepelo ea Matla le Potoloho.

Mojulo oa ho kenya Inthanete oa Audio Signal: E fumana letšoao la ho kenyelletsa molumo oa lentsoe le audio ea dijithale (AES / EBU). Analog audio signal e fetolela molumo oa dijithale ka ho fetolela (A / D) converter, ebe o kenya DSP. Digital audio input DSP ka kotloloho. DSP e tla khetha hore na ke lets'oao lefe leo e ka bang lets'oao la molumo oa ho kenya.

Digital Signal process module: Ena ke karolo ea Bohlokoa ho Motlotlehi / Transmitter, mantlha ke ts'ebetso e phahameng ea 550MHz digital signal processor (DSP), DSP ena e ka laoloa ke software mme e sebetse molumo oa dijithale oa audio bakeng sa tokiso; filthara ea dijithale; Selelekela sa dijithale; sefofane sa dijithale se etsahala; digital stereo coding, ebe o theha lets'oao la "" stereo composite sign flow ", kamora ts'ebetso ea lipalo, phallo e tla fetoloa molemong oa phallo ea FM Exclute baseband, e tla ba letšoao la phallo ea digital FM, lets'oao lena la phallo le tla romelloa ho 1000MHz Direct Digital Synthesizer (DDS) , ebe u fetoha FM RF Signal.

Digital module ea Digital FM le moditi oa Band Pass Filter: Bohlokoa ba unit ena ke Direct Digital Synthesizer (DDS), e amohela letšoao la phallo ea digital FM ho tsoa ho DSP, ebe e khokahanya le lets'oao la Lesedi la FM RF ka "synthesizer" ea eona e ka hare e tobileng. / Analog converter e ka etsa letšoao la Analog FM e fetotsoeng, qetellong u fumane letšoao le hloekileng la RF RF ho tsoa ho Band-pass Filter.

Output Power amplifier le module ea faele e tlase e fetisang: Setsi sena se koetsoe ka boiketsetso ba motlakase oa loop Automatic Gain Control (AGC) FM RF le sethala sa filimi se tlase. E ka netefatsa hore matla a phumants'o ea tšebetso a tsitsitse nakong e telele ea ho sebetsa.

Mochini oa mochine oa tšebeliso ea mochini oa batho le oa puisano: Setsi sena se sebelisa sistimi e le 'ngoe e sebetsang e phahameng System-on-a-Chip (SOC) ho sebetsa tšebetso ea mochini o phahameng oa Transmitter / Transmitter Man-Machine; Pokello ea data; Tšireletso ea alamo; Puisano le mesebetsi e meng. Taolo eohle ea ts'ebetso e kenngoa ka konopo; Sesebelisoa sa LCD le sesupo sa Transmitter Status. E ka sebelisa RS232 / RS485 / CAN / TCPIP puisano e hokahanya le PC e hole bakeng sa phetiso ea data le ts'ebetso ea taolo e hole.

Mojulo oa Phepelo ea Matla le Potoloho: e fana ka motlakase oa DC o tsitsitseng oa motlakase bakeng sa likarolo tsohle tsa ts'ebetso ho Transmitter.

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