Video: Qhov siab tshaj plaws ERP yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov siab tshaj plaws ERP . Cov Qhov siab tshaj plaws ERP cuab tam tso cai rau koj mus xam cov siab kawg muaj zog hluav taws xob zoo, hauv watts, yuav tsum tau siv rau ntawm qhov chaw tshwj xeeb, raws li FCC Txoj Cai 90.205 rau Lub Hwj Chim thiab kav hlau txais xov qhov siab txwv.
Ntawm no, qhov txawv ntawm ERP thiab EIRP yog dab tsi?
ERP Qhov Zoo Radiated Fais Fab yog tag nrho lub zog hluav taws xob los ntawm tus kav hlau txais xov tiag tiag txheeb ze rau ib nrab-yoj dipole es tsis yog lub kav hlau txais xov isotropic theoretical. Ib nrab-yoj dipole muaj qhov nce ntawm 2.15 dB piv rau tus kav hlau txais xov isotropic. Kev sib raug zoo nruab nrab ntawm EIRP thiab ERP tuaj yeem pom hauv kev sib npaug hauv qab no: Upvote.
Tsis tas li, koj yuav xam ERP li cas? Rau xam ERP , Siv lub transmitter fais fab tso zis, rho tawm qhov poob los ntawm duplexers, rho tawm ib qho kev ntsuas qhov poob qis thiab ntxiv cov kav hlau txais xov nce. Piv txwv: (2 dBd ua ke duplexer thiab feedline poob) + (5 dBd kav hlau txais xov nce) = 3 dBd nce. Siv cov kav hlau txais xov nce hauv dBd tsis yog dBi.
Kuj Paub, EIRP txwv yog dab tsi?
Piv txwv li yog tias koj lub cev tswj hwm (FCC hauv Asmeskas, IC hauv Canada) tau teeb tsa qhov siab tshaj plaws EIRP (sib npaug isotropically radiated hwj chim) rau ib tug point-to-multipoint (PtMP) system rau 36 dBm nyob rau hauv lub 2.4 GHz band, koj tx zog ntxiv rau kav hlau txais xov nce yuav tsum tsawg dua los yog sib npaug rau 36 dBm.
EIRP suav li cas?
Piv txwv li, piv txwv li lub zog hluav taws xob yog ntsuas rau lub kav hlau txais xov arbitrary. Piv txwv tias lub zog siab tshaj plaws yog ntsuas ntawm = = 90 degrees, thiab tus nqi yog EIRP = 20 dBm = -10 dB = [0.1 W = 100 mW].
Pom zoo:
Dab tsi yog rau qhov sib txawv loj ntawm lub koom haum los ntawm qhov tsawg tshaj plaws mus rau loj tshaj plaws ecologists?
Lub koom haum loj yog dab tsi, los ntawm qhov tsawg tshaj plaws mus rau qhov loj, uas cov kws tshawb fawb feem ntau kawm? 6 theem sib txawv ntawm lub koom haum uas ecologists nquag kawm yog hom, pejxeem, zej zog, ecosystem, thiab biome
Qhov siab tshaj plaws thiab qhov tsawg kawg nkaus hauv lej yog dab tsi?
Hauv kev ua lej, qhov siab tshaj plaws thiab qhov tsawg kawg nkaus ntawm qhov muaj nuj nqi yog qhov loj tshaj plaws thiab qhov tsawg tshaj plaws uas qhov kev ua haujlwm yuav siv ntawm ib qho chaw. Yam tsawg kawg txhais tau tias qhov tsawg tshaj plaws koj tuaj yeem ua tau ib yam dab tsi
Qhov siab tshaj plaws lossis qhov tsawg kawg nkaus ntawm parabola yog dab tsi?
Vertical parabolas muab cov ntaub ntawv tseem ceeb: Thaum lub parabola qhib, lub vertex yog qhov qis tshaj plaws ntawm daim duab - hu ua qhov tsawg kawg nkaus, lossis min. Thaum lub parabola qhib, lub vertex yog qhov siab tshaj plaws ntawm daim duab - hu ua themaximum, lossis max
Dab tsi yog qhov yuam kev loj tshaj plaws yog tias Irina ntsuas qhov ntev ntawm nws lub qhov rais li 3.35 feet qhov yuam kev loj tshaj plaws yog taw?
Kev daws: Qhov yuam kev loj tshaj plaws hauv kev ntsuas ntsuas tau txhais tias yog ib nrab ntawm qhov ntsuas ntsuas
Dab tsi yog qhov siab tshaj plaws ntawm qhov poob siab tso cai rau hauv av xaim?
NEC pom zoo tias qhov siab tshaj plaws ua ke voltage poob rau ob qho tib si feeder thiab ceg Circuit Court yuav tsum tsis txhob ntau tshaj 5%, thiab qhov siab tshaj plaws ntawm lub feeder lossis ceg Circuit Court yuav tsum tsis txhob ntau tshaj 3% (Fig. 1). Qhov kev pom zoo no yog qhov teeb meem kev ua haujlwm, tsis yog teeb meem kev nyab xeeb