Kingtone makonda pafupipafupiVHFKusankha ChannelBi Directional Amplifier (BDA)ndi njira zotsika mtengo komanso zodalirika zomwe zimapangidwira kuti ziwonjezere ndikuwongolera gawo lofikiraVHFmachitidwe olumikizirana ma intercom.Ma Channel Selective BDAs amalola wogwiritsa ntchito kukulitsa zonyamulira zomwe akufuna kumbali zonse ziwiri, uplink ndi downlink.Kusankhidwa kwamakanema kumatheka kwanuko kudzera pa RS 232 kapena kutali kudzera pa Modem kapena RJ45.
MFUNDO
Zindikirani 1: Mphamvu yotulutsa kachitidwe ndi ntchito ya kuchuluka kwa zonyamulira zomwe zimachitika pamakina, mulingo wazizindikiro wa zonyamulirazi mpaka
njira yowonjezeretsa ma sign, kupindula kwa ma PA, komanso kutayika kwa zosefera mkati mwa njira ziwiri.
Zindikirani 2: Chithunzi cha Phokoso la System ndi kuchuluka kwa amplifier NF ndi zotayika zosefera zisanachitike amplifier.Zosefera zimatha kudaliranso
m'lifupi la passband kwa maulendo a uplink, m'lifupi mwa passband kwa mafupipafupi a downlink, ndi stop band pakati pawo.
Kukhalapo kwa VHF Repeater BDA kumapereka njira yolankhulirana ya intercom yokhala ndi mayendedwe okwera kwambiri, popeza kufalikira kumakulitsidwa kupitilira kufalitsa masamba.Zomwe zimagwiritsidwa ntchito pamzere wa ma bootlewa ndi momwe zimakhalira m'nyumba monga ma tunnel, nyumba, njira zapansi panthaka, ndi zochitika zakunja monga mabwalo amasewera, madera akumidzi ndi madera owundana ndi matauni.Chifukwa ndi zida zapawiri, kotero mutha kupulumutsa mtengo wowirikiza kawiri chodyetsa.
Zofotokozera
| Uplink | Tsitsani | ||
| Kugwira Ntchito pafupipafupi | Tetra380 | 380 ~ 385 MHz | 390 ~ 395 MHz |
| Tetra400 | 400 ~ 405 MHz | 410 ~ 415 MHz | |
| Tetra420 | 415 ~ 420 MHz | 425 ~ 430 MHz | |
| Chithunzi cha CDMA450C | 450 ~ 455 MHz | 460 ~ 465 MHz | |
| Chithunzi cha CDMA450A | 452.5 ~ 457.5 MHz | 462.5 ~ 467.5 MHz | |
| Tetra480 | 480 ~ 485 MHz | 490 ~ 495 MHz | |
| VHF | 136 ~ 174 MHz | 136 ~ 174 MHz | |
| IDEN | 806 ~ 821 MHz | 851 ~ 866 MHz | |
| Ena | monga mwamakonda | ||
| Mphamvu Zotulutsa | 27/30/33/37/40dBm | 33/37/40/43/46dBm | |
| Kupindula | 80db | 80-95dB | |
| Tsitsani ku Uplink Separation | 3 mhz pa | ||
| MGC | ≥ 31dB / 1dB sitepe | ||
| Chithunzi cha VSWR | ≤1.5:1 | ||
| Mu gulu flatness | ≤3dB | ||
| Kusamvana kwadongosolo katatu | ≤-45dBC | ||
| Pezani zolondola zosintha | 0-10dB≤1dB | ||
| 10-20dB≤1dB | |||
| 20-30dB≤1.5dB | |||
| Kuchedwa Kwadongosolo | ≤5dB | ||
| Gulu lokana | Kufikira ± 0.4MHz | ≤-25dBm | |
| Kufikira ± 0.6MHz | ≤-35dBm | ||
| Fo±1MHz | ≤-48dBm | ||
| Spurious Emission | 9KHz~150KHz≤-36dBm/10KHz | ||
| 150KHz~30MHz≤-36dBm/100KHz | |||
| 30MHz ~ 1GHz≤-36dBm/100KHz | |||
| 1GHz-12.75GHz≤-30dBm/1MKHz | |||
| Chithunzi cha Phokoso | ≤5dB | ||
| I/O Impedans | 50Ω pa | ||
| RF cholumikizira | N-Type (Amkazi) | ||
