Tupela-Wei Redio Range Na Ol Samting i Afektim Em

Tupela -wei redio, ol i save kolim tu olsem 'walkie-talkies', em ol samting we i save mekim ol manmeri i ken toktok hariap na i no nidim ol 'celular network'. Ol i save yusim planti long pablik sekyuriti, bisnis, na ol wok ausait. Planti samting i save senisim mak bilong ol, na sapos yu kliagut long ol dispela samting, dispela inap helpim yu long makim na yusim ol gut.

Ol 'theoretical range' bilong tupela -redio i save stap long sampela kilomita i go inap long planti ten kilomita, tasol long wok, planti taim em i sotpela moa. Aninit long ol gutpela kondisen, olsem ol ples we i no gat samting i pasim o long ol ples antap, ol profesenel ikwipmen we i gat ol bikpela pawa na ol gutpela antena inap long go inap long planti kilomita. Tasol, long ol kompleks envairomen olsem ol eria we i gat planti haus, ol maunten eria, o ol bus, ol signal obstruksen na multipath intaferens i ken daunim gutpela ranj i go long planti handet mita o liklik moa.

Pawa bilong transmita em i wanpela bikpela samting long makim 'range'. Long tok klia, bikpela pawa i min olsem bikpela longwe bilong salim signal. Ol 'civilian walkie-talkies' i save yusim 0.5 i go inap 2 watts bilong pawa, tasol ol profesenel ikwipmen inap long kisim 5 watts o moa. Kain antena na mak bilong en tu i bikpela samting. Ol 'high-gain directional antenas i save helpim tru longpela -komyunikesen kapabiliti, na sapos ol i putim ol antena we i gat bikpela 'gain' dispela i save mekim 'signal' i go antap.

Ol samting bilong envairomen i no inap long lusim tingting long en long senisim 'range' bilong tupela - redio. Humiditi, ren, na sno inap long pulim sampela redio weiv, tasol 'electromagnetic interference' (olsem, long ol hai-voltej pawa lain na ol ilektronik ikwipmen) inap long mekim signal i no strong. Na tu, makim 'frequency' em i bikpela samting. VHF (very high frequency, 30-300MHz) i gat longpela wevlengt na i no gat strong long go insait tasol i gat strongpela difraksen, na dispela i mekim em i gutpela long ol ples we i op. UHF (ultra-high frequency, 300-3000MHz) i gat sotpela wevlengt na strongpela 'penetration' tasol ol samting i pasim em isi tru, na dispela i mekim em i gutpela long ol taun.

Long tok sot, mak bilong toktok bilong wanpela tu-wei redio em i no wanpela 'fixed value'; em i kamap long rot bilong bungim ol samting bilong divais, ol kondisen bilong envairomen, na seleksen bilong frikwensi. Ol yusa i mas stretim divais bilong ol bihainim ol nid bilong ol yet long mekim gutpela toktok.