Kingtone imvamisa ngokwezifisoI-VHFUkukhetha IsiteshiI-Bi Directional Amplifier (BDA)ziyizixazululo ezingabizi kakhulu futhi ezinokwethenjelwa eziklanyelwe ukunweba kanye nokwenza ngcono indawo yokukhavaI-VHFizinhlelo zokuxhumana ze-intercom.Ama-BDA Akhethiwe Esiteshi avumela umsebenzisi ukuthi akhulise abathwali abafiswayo kuphela kuzo zombili izinkomba, i-uplink ne-downlink.Ukukhetha isiteshi kuyahleleka endaweni nge-RS 232 noma ukude nge-Modem noma i-RJ45.
AMANOTHI
Qaphela 1: Amandla okukhipha isistimu angumsebenzi wenombolo yesigameko sabathwali ohlelweni, izinga lesiginali lalezi zinkampani zenethiwekhi ukuya
isistimu yokuthuthukisa isignali, ukuzuza kwama-PA, kanye nokulahlekelwa kokufakwa kwezihlungi ngaphakathi kwesistimu yokuqondisa kabili.
Qaphela 2: Umfanekiso Womsindo Wesistimu uyisamba se-NF yeamplifier kanye nokulahlekelwa kwesihlungi ngaphambi kweamplifier.Isihlungi silahlekelwa ukuncika kabusha kuso
ububanzi be-passband yamafrikhwensi e-uplink, ububanzi bebhendi yokudlula yamafrikhwensi e-downlink, kanye nebhendi yokumisa phakathi kwawo.
Ukuba khona kwe-VHF Repeater BDA kunikeza ohlelweni lokuxhumana lwe-intercom ngezinga eliphezulu lokuhlala kwesiteshi, njengoba ukusabalala kunwetshwa ngale kokufakwa kwesizinda.Ukusetshenziswa okujwayelekile kwalo mugqa wamabhuzu yizimo zangaphakathi ezinjengamahubhu, izakhiwo, imigwaqo engaphansi komhlaba, nezimo zangaphandle njengezinkundla zemidlalo, izindawo zasemaphandleni kanye nezindawo zasemadolobheni eziminyene.Ngoba iyisistimu ekabili yemishini, ngakho-ke ungagcina izindleko zokuphinda kabili okokuphakelayo.
Imininingwane
| Uplink | Isixhumanisi esingezansi | ||
| Imvamisa Yokusebenza | I-Tetra380 | 380 ~ 385 MHz | 390 ~ 395 MHz |
| I-Tetra400 | 400 ~ 405 MHz | 410 ~ 415 MHz | |
| I-Tetra420 | 415 ~ 420 MHz | 425 ~ 430 MHz | |
| I-CDMA450 C | 450 ~ 455 MHz | 460 ~ 465 MHz | |
| I-CDMA450 A | 452.5 ~ 457.5 MHz | 462.5 ~ 467.5 MHz | |
| I-Tetra480 | 480 ~ 485 MHz | 490 ~ 495 MHz | |
| I-VHF | 136 ~ 174 MHz | 136 ~ 174 MHz | |
| I-IDEN | 806 ~ 821 MHz | 851 ~ 866 MHz | |
| Abanye | njengoba ngokwezifiso | ||
| Amandla Okukhiphayo | 27/30/33/37/40dBm | 33/37/40/43/46dBm | |
| Inzuzo | 80dB | 80-95dB | |
| I-Downlink ekuhlukaniseni i-Uplink | 3 mhz imiz | ||
| MGC | ≥ 31dB / 1dB isinyathelo | ||
| I-VSWR | ≤1.5:1 | ||
| Ku-band flat | ≤3dB | ||
| I-intermodulation yama-oda amathathu | ≤-45dBc | ||
| Thola ukunemba kokulungisa | 0-10dB≤1dB | ||
| 10-20dB≤1dB | |||
| 20-30dB≤1.5dB | |||
| Ukubambezeleka Kwesistimu | ≤5dB | ||
| Ibhendi yokwenqaba | Fo±0.4MHz | ≤-25dBm | |
| Fo±0.6MHz | ≤-35dBm | ||
| Fo±1MHz | ≤-48dBm | ||
| I-Spurious Emission | 9KHz~150KHz≤-36dBm/10KHz | ||
| 150KHz~30MHz≤-36dBm/100KHz | |||
| 30MHz~1GHz≤-36dBm/100KHz | |||
| 1GHz-12.75GHz≤-30dBm/1MKHz | |||
| Umfanekiso Womsindo | ≤5dB | ||
| I/O Impedance | 50Ω | ||
| Isixhumi se-RF | N-Type (Owesifazane) | ||
