2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
FM signals yog Ameslikas horizontalally polarized (Hpol), tab sis tam sim no, ncig polarization (Cpol) yog siv yuav luag nkaus xwb. Qee zaum, cov teeb liab sib cais muab los ntawm ntsug piv rau kab rov tav polarization yog siv los tiv thaiv kev cuam tshuam ntawm NCE chaw nres tsheb.
Puas yog tus kav hlau txais xov ncaj nraim ntawm lub xov tooj cua yuav ntsug lossis kab rov tav?
Cov nthwv dej uas muaj hluav taws xob los ntawm cov xaim ncaj nraim uas yog taw qhia vertically yuav taug kev yuav txav mus rau hauv av nyob rau hauv txoj kab rov tav. Yog tias lub kav hlau txais xov ntawm qhov kawg tau txais, muab tso rau hauv vertically ces nws yuav tau txais cov cim zoo dua thiab ntau yam nthwv dej tuaj yeem tau txais sai sai.
Puas yog FM antennas directional?
Nyob rau hauv lub ntsiab lus, uas txhais tau hais tias txhua tus xov tooj cua FM yog lub kav hlau txais xov qhia, tsawg kawg rau qee qhov. Qhov ntawd yog qhov tshwm sim paub zoo thiab FCC yeej paub txog nws. Lub chaw haujlwm tseem faib cov kav hlau txais xov FM tsis yog kev taw qhia uas tsis yog "kev taw qhia" nrog cov kab mob parasitic radiators thiab lwm yam khoom siv.
Yuav tsum kav hlau txais xov ntsug?
Kav hlau txais xov yuav tsum txhua qhov taw qhia ntsug thiab cov khoom siv yuav tsum nyob deb li 3 ko taw sib nrug. Kav hlau txais xov yuav tsum tsis txhob taw tes ntsug thiab kab rov tav, thiab cov khoom siv yuav tsum tsis txhob ze tshaj 3 feet.
Tus kav hlau txais xov hom twg siv hauv xov tooj cua FM?
Bidirectional Dipole - Qhov no yog kab tias feem ntaufeem ntau siv hauv tsev FM kav hlau txais xov. Ib qho, 1/2 nthwv dej, dipole tsim muaj nyob rau hauv kev lag luam nce siv (O dB) rau feem ntau FM tshaj tawm xov tooj cua kav hlau txais xov. Daim ntawv crudest ntawm dipole yog "ribbon dipole" pom tau ntim nrog feem ntau FM tuners thiab receivers.
Pom zoo:
Yuav tsum muab cov cwj mem khaws cia ntsug lossis kab rov tav?
Thawj thiab qhov tseem ceeb tshaj plaws, cwjmem zoo li tus cwj mem, gel cwjmem, cwj mem rollerball, thiab cov ntaub ntawv zoo yuav tsum khaws cia kab rov tav. Qhov no ua rau nws kom tus cwj mem tsis ntws tawm ntawm qhov kawg ntawm tus cwj mem.
Tus kav hlau txais xov vhf puas ua haujlwm rau fm xov tooj cua?
Marine VHF kav hlau txais xov tuaj yeem siv tau txais ob-way kev sib txuas lus thiab huab cua huab cua sib txawv. Tsis tas li, tsis zoo li AM lossis UHF, VHF tuaj yeem tau txais VHF TV chaw nres tsheb thiab FM xov tooj cua ib yam nkaus. Kuv tuaj yeem siv dab tsi rau tus kav hlau txais xov FM?
Yuav tsum kav hlau txais xov router yog ntsug lossis kab rov tav?
Yog li, yog tias koj tsuas yog yuav tsum siv nws ntawm thawj pem teb hauv koj lub tsev, lossis dai rau ntawm phab ntsa kom siv lub router nyob rau hauv kab rov tav, peb xav kom koj muab lub router antenna vertically. Puas router kav hlau txais xov kev taw qhia tseem ceeb?
Cov kab twg muaj kav hlau txais xov?
Txhua yoov muaj antennae. Cov tswv cuab ntawm cov suborder Nematocera (piv txwv li, crane yoov crane yoov Crane ya, txhua yam kab ntawm tsev neeg Tipulidae (hais Diptera). Crane yoov muaj lub cev zoo li yoov tshaj cum thiab ob txhais ceg ntev.
Yuav tsum kav hlau txais xov hauv av?
Kuv Puas Yuav Tsum Taug Kuv Cov Kav Hlau Sab Nraud? Yog lawm, tag nrho cov kav hlau txais xov TV sab nraum zoov yuav tsum tau ua hauv av. Txawm hais tias koj muaj lub kav hlau txais xov yas tshiab, muaj hlau sab hauv. Tsis tas li ntawd, TV teeb liab yog ua los ntawm hluav taws xob.
