Video: Kuv puas yuav tsum siv sab sauv lossis sab qis?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv xov tooj cua sib txuas lus, a sab laug yog ib tug band ntawm frequencies siab tshaj los yog qis tshaj tus cab kuj zaus, uas yog tshwm sim los ntawm tus txheej txheem modulation. Cov teeb liab Cheebtsam saum tus cab kuj zaus ua tus sab laug sab (USB), thiab cov hauv qab cov cab kuj zaus ua tus qis sideband (LSB).
Tsuas yog li ntawd, puas yog 20 meters sab sauv lossis sab qis?
Sab nraub qaum (LSB)-- Ib leeg- sab laug Kev khiav hauj lwm hom ntawm 40, 80 thiab 160- meter amateur bands. Upper sideband (USB)--Qhov ib leeg- sab laug kev khiav hauj lwm hom ntawm lub 20 , 17, 15, 12 thiab 10- meter HF amateur bands, thiab tag nrho cov VHF thiab UHF bands.
Tsis tas li ntawd, SSB USB thiab LSB hom yog dab tsi? Los ntawm convention, rau amateur siv, LSB feem ntau yog siv rau qis zaus bands thiab USB yog siv rau sab sauv zaus bands. Nkag siab, ob leeg USB thiab LSB yog ob leeg hom ntawm SSB los yog ib sab band, Amplitude Modulated, (AM), teeb liab, feem ntau kis tau nrog txo los yog tsis muaj cab kuj.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog qhov txiaj ntsig tseem ceeb ntawm SSB?
Cov Cov txiaj ntsig tseem ceeb ntawm SSB Cov cim qhia yog tias qhov chaw spectrum lawv nyob yog tsawg dua ib nrab ntawm cov teeb liab AM. Qhov no txhais tau hais tias muaj ntau qhov chaw spectrum txuag rau lwm cov cim kom xa mus rau tib zaus.
Dab tsi yog qhov HCUT FREQ rau SSB hom?
11-03 SSB HCUT FREQ Description: Qhov no yog qhov siab- zaus cutoff audio filter hauv SSB mode . 4000 Hz.
Pom zoo:
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