ʻO KingTone Tetra DMR UHF 400MHz 450MHz Line Amplifer BDA i hoʻohana ʻia no ka Pūnaehana Distribution Indoor (IBS), Basement, Tunnel Coverage
ʻO ka ʻōnaehana hoʻohele i loko (IBS), lalo, nā ʻanuʻu o ka uhi ʻana i ka tunnel:
1. Ka nānā 'enekinia kahua hoʻokomo: ʻO ka hōʻailona kahua kahua 380-400MHz?
Hiki i ka hōʻailona kelepona hele ma ka wahi e komo ai ka tunnel ke loaʻa nā hōʻailona 3-4 (ʻo ka ikaika o ke kahua he -85dBm a ʻoi aku paha)?Inā ʻaʻole, e ʻimi i kahi kokoke i ka tunnel me ka hōʻailona maikaʻi ma ke ʻano he wahi hōʻailona;
'Ōlelo Aʻo: Pono ka wahi e loaʻa ai ke kūlana o ka antenna e loaʻa ana, akā ʻaʻole ia ke kūlana o ka mea hou.ʻAʻole i kaupalena ʻia ka mamao mai ka antenna e loaʻa ana i ka repeater (hiki ke kokoke a mamao paha), a hoʻoponopono ka mea kūʻai iā ia iho e like me ka papahana;
2, hoʻokomo antenna
E loaʻa i ka mea hana hou nā awa ʻelua, ua pili ka awa BS i ka antenna e loaʻa ana (i ke kahua kahua), a ua pili ke awa MS e uhi i ka antenna (ma kahi o ka uhi);
Eia nō naʻe, i mea e pale aku ai i ka hoʻoulu ʻana iā ia iho o ka mea hana hou, ʻaʻole hiki i ka mea hana hou ke hana (ʻo ka hoʻoulu ʻana iā ia iho e hoʻopau ʻia ka module amplifier power repeater), no laila e noʻonoʻo i kēia mau mea ʻelua:
a, pono e hoʻi ka antenna loaʻa a me ka antenna uhi i ke kua;
b, ʻo ka mamao ma waena o ka antenna loaʻa a me ka antenna uhi ma kahi o 50 mau mika, a ua hoʻoponopono ʻia ka mamao kikoʻī e like me ke kūlana maoli ma ka pūnaewele;
c.Inā ʻo ke kaʻina hana, ua hiki ka mamao ma waena o nā antenna ʻelua i 80 mau mika a ʻoi aku paha, ʻaʻole hiki ke pale aku i ka hauʻoli ponoʻī.Manaʻo ʻia nā mea kūʻai aku e hoʻohui i kahi ʻupena kaʻawale ma waena o nā antenna ʻelua (e like me kahi ʻāpana hao nui) a i ʻole e hoʻohana i nā kūlana o ka pūnaewele i Hoʻokaʻawale ʻia ka antenna (e like me ke kuahiwi a i ʻole kahi hale nui);
3, e like me ka wahi uhi: 500 mika ka lōʻihi tunnel e kau i kahi mīkini mamao
4, feeder & connector: 1/2″ coaxial cable, lōʻihi: hana nā mea kūʻai aku e like me nā pono o ka papahana!
5, inā he kihi i loko o ka tunnel, ua ʻōlelo ʻia e hoʻohui i kahi splitter ʻelua-mana i ka repeater, huki i kahi mea hānai, a hoʻohui i kahi antenna uhi e uhi;
