KingTone Tetra DMR UHF 400MHz 450MHz Line Amplifer BDA loo isticmaalo Nidaamka Qaybinta Gudaha (IBS), Qeybta hoose, Daboolka Tunnel
Nidaamka Qaybinta Gudaha (IBS), Qeybta Hoose, Tallaabooyinka Xalka Daboolista Tunnel:
1. sahanka injineernimada goobta rakibida: calaamada saldhiga saldhiga miyaa 380-400MHz?
Calaamadaha taleefanka gacanta ee meesha laga soo galo tunnel-ka ma heli karaa calaamadaha 3-4 (xoogga goobta waa in uu leeyahay -85dBm ama ka sii fiican)?Haddii kale, raadi meel u dhow tunnel-ka oo leh calaamad wanaagsan oo ah barta hesha signalka;
Fiiro gaar ah: Barta la helayaa waa in ay ahaataa booska anteenada, laakiin maaha booska soo-celinta.Masaafada u jirta anteenada hesha ilaa soo celinta ma xaddidna (waxay noqon kartaa mid dhow ama fog), macaamilkuna wuxuu isku hagaajiyaa si waafaqsan mashruuca;
2, rakibida anteenada
Dib-u-celinta waxay yeelan doontaa laba dekedood, dekedda BS waxay ku xiran tahay anteenada helitaanka (dhinaca saldhigga), iyo dekedda MS waxay ku xiran tahay anteenada (dhinaca aagga daboolka);
Si kastaba ha ahaatee, si looga fogaado is kicinta soo-celinta, soo-celinta ma shaqeyn karto (is-xakamaynta daran waxay keenaysaa in moduleka korantada soo noqnoqda uu gubo), markaa fiiro gaar ah u yeelo labadan qodob ee soo socda:
a, anteenada hesha iyo anteenada daboosha waa inay dib ugu noqdaan;
b, masaafada u dhaxaysa anteenada hesha iyo anteenada daboosha waa ugu yaraan in ka badan 50 mitir, masaafada gaarka ah waxaa lagu hagaajiyaa iyadoo loo eegayo xaaladda dhabta ah ee goobta;
c.Haddii habka rakibidda, masaafada u dhaxaysa labada anteeno ay gaadhay 80 mitir ama ka badan, waa wax aan macquul ahayn in laga fogaado is-xakamaynta.Waxaa lagu talinayaa in macaamiishu ay ku daraan shabaq go'doon ah oo u dhexeeya labada anteeno (sida bir weyn) ama isticmaal shuruudaha goobta anteenadu waa go'doonsan tahay (sida buur ama dhismo weyn);
3, marka loo eego aagga daboolka: Dhererka tunnel 500 mitir si loo dhigo mashiinka fog
4, feeder & xiriiriyaha: 1/2 ″ fiilada coaxial, dhererka: macaamiishu waxay u habeeyaan si waafaqsan baahiyaha mashruuca!
5, haddii ay jirto gees ka mid ah tunnel-ka, waxaa lagu talinayaa in lagu daro kala qaybiyaha laba-tamar ah ee soo noqnoqda, jiid quudiyaha, oo ku dar anteeno dabool leh si loo daboolo;
