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He aha ka hana e pili ana i ka hana leki uila FM?

He ʻokoʻa kūpono ka Digital FM Transmitter mai Analog FM Transmitter.

No ka pōkole, hoʻohana ka Analog FM Transmitter i ʻenehana like me VCO + PLL, akā ua hoʻohana ʻo Digital FM Transmitter i ka uila uila pūnaewele ʻo DSP + DDS, ʻo ke kiʻi e like me lalo:

 

 

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Paʻihana Hana:

Hoʻokomo pū ka Digital FM Transmitter i nā ʻāpana o ka module: Audio Signal Input module; Digital anakahi kaʻina hana; Digital FM Modulator a me Band Mod Filter filter; Mea hoʻonui mana hoʻonui a me ka module filter low-pass; Man-mīkini Interface & Communication module a me ka Power Supply & Kaapuni module.

Audio module Signal Input: loaʻa ia i nā ʻōkuhi leo uila a me ka leo uila (AES / EBU) hōʻailona hōʻailona. Hoʻololi ia ka mea leo leo i nā leo kikowaena ma o (A / D) hoʻololi, a laila hoʻokomo i ka DSP. Kaomi uila ma DSP pololei. E koho ka DSP i ka hōʻailona e hiki ke lilo i ka hōʻailona kaha hoʻokomo.

Palapala Hoʻoʻina Kauka Hoʻoaukaha: ʻO ia kahi ʻāpana i loko o Exciter / Transmitter, ʻo ka kumu nui ka hana kiʻekiʻe 550MHz ʻōnaehana hōʻailona (DSP), hiki i kēia DSP ke kāohi ʻia e ka polokalamu a me ka hana ʻana i ka hōʻailona uila uila no ka loaʻa ʻana o ka hoʻoponopono; kānana kaulike; hoʻonaninani hoʻonaninani; hui nā mea uila; kaomi uila stereo kau, a laila hoʻokumu i ka holo o ka hoʻokalakupua neʻe stereo, ma hope o ka hana matematika, e hoʻohālikelike ʻia ka holo i ke kahe ʻana o ka pīkī FM exciter, e lilo ia i ka mea uila FM uila, e hōʻike ʻia kēia kahe kahe i ka 1000MHz Direct Digital Synthesizer (DDS) , ma laila e loli i ka FM RF Signal.

Digital FM Modulator a me ka Band Pass Filter Filter: ʻO ka kumu nui o kēia ʻāpana ʻo Direct Digital Synthesizer (DDS), e loaʻa ana i ka palapala uila digital mai DSP, a laila hoʻokaʻawale i ka hōʻailona FM RF ma o ka kikoʻī kūwī maʻamau o kāna synthesizer, kāna kūloko kūloko. / hiki i ka mea hoʻolilo analog ke hana i ka hōʻailona FM modulated hōʻailona, ​​hope loa i loaʻa i ka hōʻailona RF FM maʻamau mai Band-pass Filter.

Kaomi mana amplifier a me ka low-pass filter module: ʻO kēia ʻāpana i paʻa ka pahu o nā Mana Gain Control (AGC) FM RF ka mana amplifier a me ka pehu panoho panoho iki. Hiki iā ia ke hōʻoia paʻa i ka mana hoʻopulu paʻa ʻana i ka manawa hana lōʻihi.

Man-mīkini Interface & Communication module: Hoʻohana kēia anakuhi i hoʻokahi kiʻekiʻe kiʻekiʻe System-on-a-Chip (SOC) e hana i ka Exciter / Transmitter Man-machine Interface; ʻOhi ʻikepili hana; Ka pale ʻana i ka pū waikaua; Nā kamaʻilio a me nā hana ʻē aʻe. Hoʻokomo ʻia ke kaʻina hana āpau e ke pihi; LCD pale a me ka malamalama hōʻike Transmitter Kūlana. Hiki iā ia ke hoʻohana i ke kamaʻilio kamaʻilio RS232 / RS485 / CAN / TCPIP me ka PC mamao no ka lawe ʻana o ka ʻikepili a me ka hana mamao mamao.

Lako ikehu & kaʻapuni Module: hāʻawi ia i ka DC voltage voltage paʻa no kēlā me kēia anakahi hana i Transmitter.

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