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VHF Combiners

A VHF khefuka hare (e boetse e tsejoang as a VHF sekhetho khefuka hare) is a sesebediswa sebelisetsoa ho kopanya multiple ka matshwao a medumo in ea haholo phahameng maqhubu (VHF) lethathama ho kena a E masoha Letšoao. It is ea bohlokoa etsoe hasa liteishene hobane it dumella multiple fetisetsaters ho kabelo ea ea tsoanang Antenna, e leng e ntlafatsa tsamaiso bokgoni 'me Ho tšepahala. sena se is ho hlokahala in taelo ho nyollelo Letšoao matla 'me ntlafatsa Boitsebiso sebakeng seo.

Koponyi ea VHF e sebelisetsoa eng?
Lisebelisoa tsa VHF li sebelisoa ho kopanya li-transmitters le li-receiver tse ngata ho tsamaiso e le 'ngoe ea antenna. Sena se lumella ho eketsa ts'ebetso e sebetsang hantle le ho boloka litšenyehelo. Lisebelisoa tse atileng haholo tsa likhokahanyo tsa VHF li kenyelletsa khaso, polokeho ea sechaba le likhokahano tsa sesole, le seea-le-moea se sa sebetseng.
U sebelisa kompone ea VHF joang ho hasa?
1. Etsa bonnete ba hore li-antenna tsohle tsa VHF tse hokahaneng le komporo li hlophisitsoe hantle ebile li maemong a matle.
2. Lokisa ka hloko litlhophiso tsa phaello ea motsoako ho tsamaisana le tlhahiso ea li-antenna.
3. Lekola tlhahiso ea motsoako ho netefatsa hore matšoao a kopantsoe hantle 'me tšitiso leha e le efe e felisoa.
4. Qoba ho sebelisa motsoako libakeng tseo ho tsona ho ka bang le tšitiso e matla, tse kang haufi le mohala oa motlakase.
5. Etsa bonnete ba hore likarolo leha e le life tse ling tse eketsehileng li hokahane hantle, tse kang li-amplifiers kapa li-filters.
6. Kamehla hlahloba likhokahano le litlhophiso tsa motsoako ho netefatsa ts'ebetso e nepahetseng.
Koponyi ea VHF e sebetsa joang?
Sesebelisoa sa VHF ke sesebelisoa se sebelisoang liteisheneng tsa khaso ho kopanya mats'oao a mangata ho tsoa ho li-transmitters tse fapaneng ho ea tlhahiso e le 'ngoe. E sebetsa ka ho kopanya matšoao a tsoang ho li-transmitter tse ngata ho ea ho lets'oao le le leng, ebe le phatlalatsoa ho tsoa ho antenna e le 'ngoe e tloaelehileng. Sena se thusa ho fokotsa palo ea li-antenna tse hlokahalang bakeng sa khaso. E boetse e thusa ho fokotsa bongata ba tšitiso e ka hlahang ho tsoa ho matšoao a mangata a phatlalatsoang ho tsoa ho li-antenna tse ngata.
Ho na le mefuta e mekae ea li-componer tsa VHF, 'me phapang pakeng tsa eona ke efe?
Ho na le mefuta e meraro ea mantlha ea likhokahanyo tsa VHF: passive, hybrid, le e sebetsang. Li-connectors tsa Passive VHF ke khetho e bonolo ka ho fetisisa le e theko e tlaase, empa e ka sebelisoa feela ha matšoao 'ohle a le boemong bo tšoanang ba matla. Li-connectors tsa Hybrid VHF li ka amohela matšoao ka maemo a fapaneng a matla, empa li rarahane ebile li theko e boima ho feta li-complex tse sa sebetseng. Lisebelisoa tsa VHF tse sebetsang li fana ka ts'ebetso e phahameng ka ho fetisisa, empa ke khetho e rarahaneng ka ho fetisisa le e theko e boima ka ho fetisisa.
U ka khetha motsoako o motle ka ho fetisisa oa VHF joang?
Ha u khetha motsoako o motle ka ho fetisisa oa VHF bakeng sa seteishene sa khaso, ho bohlokoa ho nahana ka lintlha tse 'maloa tsa bohlokoa. Taba ea pele, nahana ka boholo le tlhophiso ea kompone ea VHF, ho etsa bonnete ba hore e lekana sebaka se fumanehang 'me e tla sebetsana le litlhoko tsa matla le khafetsa tsa seteishene. Taba ea bobeli, nahana ka boleng ba likarolo le lisebelisoa tse sebelisoang sehlahisoa, ho etsa bonnete ba hore se tla emelana le litlhoko tsa seteishene sa khaso. Qetellong, nahana ka theko ea sehlahisoa, hammoho le litiisetso kapa litiisetso tse fanoeng. Ho bohlokoa hape ho bala maikutlo a bareki ho fumana mohopolo o betere oa hore na sehlahisoa se tla sebetsa hantle hakae ts'ebetsong.
U hokela joang kompone ea VHF ka nepo tsamaisong ea khaso?
1. Qala ka ho hokahanya antenna ho kenya letsoho ho kopanya VHF.
2. Kopanya tlhahiso ea motsoako ho transmitter.
3. Kopanya mobu oa motsoako ho ea fatše oa transmitter.
4. Etsa bonnete ba hore likhokahano tsohle li sireletsehile 'me motsoako o matlafatsoa.
5. Netefatsa likhokahano ka metara ea VSWR kapa lisebelisoa tse ling tse nepahetseng tsa tlhahlobo.
6. Fetola li-amplitudes tsa ho kenya le ho hlahisa motsoako ho ea ho maemo a lakatsehang.
7. Lekola ts'ebetso ea motsoako le transmitter ho netefatsa ts'ebetso e nepahetseng.
Ke lisebelisoa life tse amanang le motsoako oa VHF?
Thepa e amanang le motsoako oa VHF seteisheneng sa khaso e kenyelletsa: li-amplifiers tse kopanyang, likopano tsa li-filters, likhoele tsa phetisetso, li-antenna couplers, li-couplers tse tataisang, le li-divider tsa motlakase.
Litlhaloso tsa bohlokoahali tsa 'mele le tsa RF tsa motsoako oa VHF ke life?
Litlhaloso tsa bohlokoahali tsa 'mele le tsa RF bakeng sa motsoako oa VHF li kenyelletsa:
- Frequency Range: Mohokahanyi oa VHF o lokela ho sebetsa ho pholletsa le maqhubu a VHF (30 MHz - 300 MHz).
- Tahlehelo ea ho Kena: Tahlehelo ea ho kenya e lokela ho ba tlase, hangata e ka tlase ho 0.5 dB.
- Tahlehelo ea ho khutla: Tahlehelo ea ho khutla e lokela ho ba holimo, hangata e kholo ho feta 10 dB.
- Ho itšehla thajana: Karohano lipakeng tsa likou e lokela ho ba holimo, hangata e kholo ho feta 30 dB.
- VSWR: VSWR e lokela ho ba tlase, hangata ka tlase ho 1.5: 1.
- Tšitiso: Tšitiso e lokela ho ba 50 Ohms.
- Ts'ebetso ea Matla: Ts'ebetso ea matla e lokela ho lekana bakeng sa ts'ebeliso.
U boloka kompone ea VHF ka nepo joang joalo ka moenjiniere?
Joaloka moenjiniere, ho bohlokoa ho etsa tlhokomelo ea letsatsi le letsatsi ea motsoako oa VHF seteisheneng sa khaso ho netefatsa ts'ebetso e nepahetseng. Sena se kenyelletsa ho hlahloba kamehla motsoako bakeng sa matšoao leha e le afe a tšenyo, ho etsa bonnete ba hore likhokahano tsohle li sirelelitsoe hantle, ho hlahloba likarolo tsohle tsa motheo, le ho hloekisa motsoako ka tharollo e amohelehang ea ho hloekisa. Ho feta moo, ho bohlokoa ho etsa liteko khafetsa tsa phaello le tahlehelo ho etsa bonnete ba hore kompone e sebetsa hantle le ho lekola boemo ba ho kopanya. Qetellong, ke habohlokoa ho hlahloba maemo a matla le ho etsa liphetoho tse hlokahalang.
U ka lokisa VHF joang haeba e sa sebetse?
Ho lokisa motsoako oa VHF, o tla hloka ho tseba likarolo tse robehileng ebe o li nkela sebaka ka likarolo tse ncha tse lumellanang. Ntlha ea pele, etsa bonnete ba hore motlakase o tima ebe o sebelisa multimeter ho lekola motlakase oa karolo ka 'ngoe. Haeba e le tlase ho feta matla a khothalletsoang, joale e tla hloka ho nkeloa sebaka. Ka mor'a moo, sebelisa tšepe ea soldering ho tlosa likarolo leha e le life tse robehileng kapa tse senyehileng. Ebe, khutlisetsa likarolo tse robehileng ka tse ncha. Hang ha likarolo tse ncha li se li le teng, li rekise hammoho 'me u sebelise multimeter ho hlahloba hore na motlakase o nepahetse. Qetellong, kopanya kompone hape 'me u e leke ho netefatsa hore e sebetsa hantle. Haeba e sa sebetse, ho ka 'na ha hlokahala hore u fetole likarolo tse ling.
U ka khetha sephutheloana se nepahetseng joang bakeng sa kompone ea VHF?
Ha u khetha sephutheloana bakeng sa motsoako oa VHF, etsa bonnete ba hore u khetha lisebelisoa tse matla le tse tšoarellang ka ho lekaneng ho sireletsa sekontiri tšenyo leha e le efe e ka ntle. Ho feta moo, etsa bonnete ba hore o paka kompone ka tsela e thibelang ho ts'oha kapa ho thothomela nakong ea lipalangoang. Hape ke habohlokoa ho etsa bonnete ba hore sephutheloana se tiisitsoe hantle ho thibela mongobo ho kena. Qetellong, etsa bonnete ba hore o ngola sephutheloana ho netefatsa hore kompone ha e hlaheloe ke mocheso leha e le ofe o feteletseng nakong ea leeto.
Ke lisebelisoa life tse sebelisetsoang ho kopanya VHF?
Khase ea motsoako oa VHF hangata e entsoe ka tšepe, joalo ka tšepe kapa aluminium. Lisebelisoa tsena li ke ke tsa ama ts'ebetso ea motsoako, hafeela motsoako o tiisitsoe hantle ho thibela mongobo leha e le ofe kapa lerōle ho kena.
Sebopeho sa motheo sa motsoako oa VHF ke sefe?
Sebopeho sa mantlha sa motsoako oa VHF hangata se na le duplexer, isolator, le sefe. Duplexer e lumella matšoao a mabeli ho kopanngoa kapa ho aroloa 'me e sebetsa e le kou ea ho kenya / e ntšang bakeng sa kopanyo. Sehlaseli se thibela maikutlo mme se arola lets'oao le leng le le leng ho le leng, ha filthara e thusa ho hana matšoao a sa batleheng. Ts'ebetso le litšoaneleho tsa motsoako li khethoa haholo ke boleng ba likarolo tse sebelisoang mohahong oa eona. Ntle le leha e le efe ea mehaho ena, motsoako o ke ke oa khona ho sebetsa ka mokhoa o tloaelehileng.
Ke mang ea lokelang ho abeloa ho sebetsa kompone ea VHF?
Motho ea abetsoeng ho laola motsoako oa VHF e lokela ho ba motho ea nang le phihlelo le tsebo ea khaso, maqhubu a seea-le-moea le liphatlalatso. Motho enoa o boetse o lokela ho ba le tsebo e ntle ea ho rarolla mathata le tsebo ea litsamaiso tsa li-antenna, hammoho le bokhoni ba ho rarolla mathata le ho hlahloba mathata afe kapa afe a tekheniki a ka hlahang.
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