ʻO nā ʻano kumu o ka modulation digital binary:Ke kī amplitude binary (2ASK)—hoʻololi amplitude o ka hōʻailona lawe; ʻO ka hoʻololi pinepine ʻana i nā kī (2FSK)—hoʻololi pinepine o ka hōʻailona lawe; ʻO ka hoʻololi ʻana i ka hana binary (2PSK)—ka hoʻololi ʻana o ka hōʻailona lawe. Ua hana ʻia ke kī kī ʻokoʻa (DPSK) no ka maopopo ʻole o ka pae o ka ʻōnaehana 2PSK.
Pono ʻo 2ASK a me 2PSK ʻelua i ka nui o ka bandwidth e like me ka helu hōʻailona, ʻoiai ʻo 2FSK e pono ai ka bandwidth ma mua o 2ASK a me 2PSK.
ʻO ka hapa hapa hapa o nā ʻōnaehana hoʻololi kikohoʻe binary e pili ana i ka ratio hoʻokomo hōʻailona-a-noise r o ka demodulator. Ma ke ʻano o ka leo keʻokeʻo Gaussian anti-additive, ʻo 2PSK coherent ka hana maikaʻi loa, ukali ʻia e 2FSK, a ʻo 2ASK ka mea ʻino loa.
ʻO Ask kekahi o nā ʻano hana modulation kumu mua loa. ʻO kāna mau mea maikaʻi, ʻo ia ka hoʻohana ʻana i kahi band kiʻekiʻe a loaʻa nā lako maʻalahi. ʻO kona pōʻino, ʻaʻole iahana maikaʻi i ka walaʻau a paʻakikī i nā hoʻololi ʻana i nā hiʻohiʻona o ke kahawai, he mea paʻakikī ke kiʻi ʻana i ka mea hoʻoholo laʻana e hana ma ke kūlana paepae hoʻoholo maikaʻi loa.
ʻO FSK kahi ʻano modulation pono ʻole i ka kamaʻilio digital. ʻO kona pōmaikaʻi ʻo ia ka ikaika anti-interference ikaika a ʻaʻole i hoʻopilikia ʻia e ka hoʻololi ʻana o nā ʻāpana kahawai, no laila kūpono loa ʻo FSK no nā kahawai mae; ʻO ka hemahema, ʻo ia ka laulā o ka hui i noho ʻia, ʻoi aku hoʻi no ka mf-sk, a haʻahaʻa ka hoʻohana ʻana i ka band. I kēia manawa, hoʻohana nui ʻia ka ʻōnaehana FM no ka lawe ʻana i ka ʻikepili haʻahaʻa a me ka wikiwiki.
ʻO PSK a i ʻole DPSK kahi ʻano modulation me ka hana hoʻoili kiʻekiʻe. ʻOi aku ka ikaika o kona hiki ke kūʻē i ka walaʻau ma mua o ASK a me FSK, a ʻaʻole maʻalahi ia e hoʻololi i nā ʻano o ke kahawai. No laila, ua hoʻohana nui ʻia i ka hoʻoili ʻikepili kiʻekiʻe a me ka wikiwiki. Loaʻa ka pilikia o ka hoʻololi ʻana o ka pae piha (PSK) i ka ambiguity pae lawe i ka demodulation coherent, ʻaʻole i hoʻohana ʻia i ka hoʻouna pololei ʻana i ka hana. Hoʻohana nui ʻia ka MDPSK.
ʻO ka mea ma luna nei ka ʻatikala "Binary digital modulation," i lawe ʻia e Shenzhen HDV photoelectric Technology Co., Ltd. ʻO nā huahana kamaʻilio i hana ʻia e ka hui uhi:
Māhele Module: nā modules fiber optical, Nā modules Ethernet, nā modules transceiver fiber optical, nā modules komo fiber optical, SSFP mau modula optical, aʻO nā fiber optical SFP, etc.
ONUwaeʻano: EPON ONU, AC ONU, puluniu maka ONU, CATV ONU, GPON ONU, XPON ONU, etc.
OLTpapa: hoʻololi OLT, GPON OLT, EPON OLT, kamaʻilioOLT, etc.
Hiki i nā huahana module i luna ke hāʻawi i ke kākoʻo no nā hiʻohiʻona pūnaewele like ʻole. Hiki i kahi hui R&D ʻoihana a ikaika ke kōkua i nā mea kūʻai aku me nā pilikia ʻenehana, a hiki i kahi hui ʻoihana noʻonoʻo a ʻoihana ke kōkua i nā mea kūʻai aku e loaʻa nā lawelawe kiʻekiʻe i ka wā o ka kūkākūkā mua a me ka hana ma hope o ka hana. Welina mai iā ʻoekāhea iā mā˚ouno kēlā me kēia ʻano nīnau.
