Haeba o kile oa sebelisa puisano ea RF (radio frequency), marang-rang a cellular, kapa sistimi ea antenna, o kanna oa kopana le lentsoe LMR cable. Empa hantle-ntle ke eng ’me ke hobane’ng ha e sebelisoa haholo hakaale? Sehloohong sena, re tla hlahloba hore na thapo ea LMR ke eng, litšobotsi tsa eona tsa bohlokoa, le hore na ke hobane'ng ha e le khetho e ratoang bakeng sa lits'ebetso tsa RF, ebe re araba potso e reng 'Cable ea LMR ke eng?'.
Utloisisa cable ea LMR coaxial
LMR cable ke thapo ea coaxial e etselitsoeng ts'ebetso e phahameng, phetiso ea matšoao a tahlehelo e tlase lits'ebetsong tsa RF. Lithapo tsa LMR li entsoe ke Times Microwave Systems 'me li tsebahala ka ho sireletsa, ho lahleheloa ke mats'oao a tlase, le ho tšoarella, e leng se etsang hore e be tse loketseng bakeng sa puisano e se nang mohala, GPS, khetho e nepahetseng bakeng sa radar le lits'ebetso tse ling tse thehiloeng ho RF. Ho fapana le likhoele tsa setso tsa coaxial, likhoele tsa LMR li entsoe ka likarolo tse ngata tsa tšireletso le lisebelisoa tsa dielectric ho netefatsa botšepehi bo betere ba matšoao. Li tla ka boholo bo fapaneng tseo u ka khethang ho tsona, joalo ka LMR-195, LMR-240, LMR-400, le LMR-600, e 'ngoe le e' ngoe e etselitsoe ho sebetsana le matla a fapaneng le litlhoko tsa tahlehelo ea matšoao.
Litšobotsi tse ka sehloohong tsa LMR coaxial cable
Lithapo tsa LMR li hlahella lebaleng la likhoele tsa coaxial ka lebaka la sebopeho sa tsona se ikhethang le melemo ea ts'ebetso:
1. Ho lahleheloa ke letšoao le tlaase
E 'ngoe ea melemo ea bohlokoa ka ho fetisisa ea lithapo tsa LMR tse nang le tahlehelo e tlase ea lets'oao ke ho fokotseha ha tsona ka sebaka se selelele (tahlehelo ea matšoao). Sena se finyelloa ka lisebelisoa tsa boleng bo phahameng ba dielectric insulation le shielding, e leng ho fokotsa tahlehelo ea matla ha lipontšo li feta likhoeleng.
2. Ts'ebetso e ntle ea tšireletso
Moralo oa thapo ea LMR o na le mekhahlelo e mengata e sireletsang, hangata e kenyelletsang tšireletso ea aluminium bakeng sa ts'ireletso ea mantlha ea EMI (electromagnetic interference). Ho loha tšireletso ea ka ntle ho matlafatsa nako e telele 'me ho fokotsa ho kena-kenana le ho feta. Tšireletso ena e tiisa mats'oao a matla le a hlakileng haholoanyane, e etsa hore likhoele tsa LMR e be khetho e nepahetseng bakeng sa lits'ebetso tsa RF tse hlokolosi.
3. Ho tšoarella le ho hanyetsa boemo ba leholimo
Times Microwave Systems e hlahisa lithapo tsa LMR, tseo sheath ea tsona e ka ntle e entsoeng ka polyethylene (PE) kapa thermoplastic elastomer (TPE), e etsa hore e hanyetse mahlaseli a kotsi, mongobo le mocheso o feteletseng. Mefuta e meng, joalo ka LMR-UF (Ultra Flex), e fana ka phetoho e eketsehileng bakeng sa lits'ebetso tse hlokang ho khumama khafetsa le ho sisinyeha.
4. Ho kenya habonolo le ho loketseng
Ha ho bapisoa le lithapo tsa khale tse thata tsa coaxial, likhoele tsa LMR li na le maemo a holimo le bonolo, 'me li etsa hore ho be bonolo ho kenya. Radius ea bona e kobehang e nyane haholo ho feta ea likhoele tsa RF tse ts'oanang, tse lumellang hore ho kenngoe ka thata libakeng tse koetsoeng.
5. Ho lumellana le li-connectors tsa RF
Lithapo tsa LMR li tšehetsa likhokahanyo tse ngata, ho kenyeletsoa lihokelo tsa mofuta oa N (tse sebelisoang hangata lits'ebetsong tsa antenna le RF). Sehokelo sa SMA (bakeng sa lisebelisoa tse se nang mohala le GPS). Sehokedi sa BNC (se tummeng kgasong le marangrang). Khokahano ena e etsa hore li fetohe haholo liindastering tse fapaneng.
Lisebelisoa tse Tloaelehileng tsa Lithapo tsa LMR
Ka lebaka la ts'ebetso ea eona e ntle haholo, likhoele tsa LMR li sebelisoa haholo liindastering tse itšetlehileng ka puisano ea RF. Tse ling tsa lits'ebetso tse atileng haholo li kenyelletsa marang-rang a se nang mohala le a cellular, li-antenna le litsamaiso tsa RF, GPS le puisano ea sathelaete, lits'ebetso tsa sefofane, lits'ebetso tsa ho beha leihlo le ts'ireletso.
Khetha thapo e nepahetseng ea LMR
Khetho ea mofuta o nepahetseng oa thapo ea LMR e ipapisitse le lintlha tse 'maloa, ho kenyelletsa khafetsa, sebaka, ho ts'oaroa ha matla le maemo a tikoloho. Mona ke tse ling tsa likhetho tse tloaelehileng:
LMR-195 le LMR-240: E loketse lits'ebetso tsa nako e khuts'oane joalo ka li-antenna tsa Wi Fi le lisebelisoa tsa GPS.
LMR-400: Khetho e tlase ea tahlehelo ea bohareng e sebelisoang hangata lits'ebetsong tsa radio tsa cellular le tse peli.
LMR-600: E loketse haholo lits'ebetso tsa sebaka se selelele moo tahlehelo ea matšoao e tlamehang ho fokotsoa haholo.
Haeba o hloka ho feto-fetoha ha maemo a lits'ebetso tsa mehala, thapo ea LMR-UF (Ultra Flex) le eona ke khetho e ntle.
Nako ea poso: Mar-13-2025