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Staro 26.07.2016., 15:07   #1
_saiko
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3G sa vanjskom antenom

Pozdrav,


Treba mi preporuka usb 3g sticka a da dobro locka signal i ima sma/ts9/crc9 konektor?
Jos bolje da radi na Mikrotiku

Isto tako ima li gdje u hr gotova yagica za 900 odnosno 2100MHz?
Moze i logica veceg raspona...

Imam na vikendici u brdovitom zagorju klasicni problem otkad je GSM-a - signala jedva za voice, EDGE skoro neupotrebiv latencije preko 500ms.
Treba mi data.

S vrha brda iznad vikendice imam pogled prema tornju gdje uredno ide 3G.
Mislio sam nabaviti/sloziti yagicu i postaviti ju na vrh brda zajedno sa modemom i usmjeriti ju prema tornju. Do vikendice bi se vec snasao ili utp-om ili usmjerenim wifi-em.

Dal ima netko da je ovakvo sto radio opcenito?

Takodjer, dal da se koncentriram na 900MHz ili 2100MHz (iako ovo ovisi o tornju sto moram sam provjeriti..)?

Zahvaljujem na sugestijama!
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cat.7 - where crosstalk is not an issue anymore.
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Staro 26.07.2016., 18:00   #2
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Sad ćeš se nasmijati, da probaš složiti neki reflektor na brdu strateški usmjeren / pozicioniran ?
Potom iz vikendice sa dobrom antenom "pucaš" na reflektor ...
Za antenu mislim da smo spominjali da se može naći, pitanje je kvaliteta / karakteristike / nofčići ...
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Staro 26.07.2016., 18:54   #3
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Ha i da tako riješim ostaje pitanje za stick i antenu
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cat.7 - where crosstalk is not an issue anymore.
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Staro 01.08.2016., 19:07   #4
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iskra p54 će ti biti dovoljna. na lokaciji gdje se signal učestalo gubi i EDGE također neupotrebljiv ova antena je uspješno lovila 3G signal unatoč 10m kabela i extra konektoru.
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Staro 02.08.2016., 16:53   #5
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Bome skoro 300kn kod kermana ta p54...

Kak bi prosao da uzmem yagicu na 2100MHz kineza: http://www.ebay.com/itm/35-dbi-high-...YAAOSwPhdVSNdd

Yagica je usmjerenija i za 20$ ako je gain upola toliko koliko vele..
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cat.7 - where crosstalk is not an issue anymore.
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Staro 02.08.2016., 21:17   #6
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Ta Yagi-Udo antena nije optimizirana i još je širokopojasna, a sa tih 17 elemenata bi se očekivalo oko 15dBi ....
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Staro 03.08.2016., 15:42   #7
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Dal ima netko da je ovakvo sto radio opcenito
nisam radio isto, ali slicno, lovio jaci LTE signal

https://www.amazon.de/s/ref=nb_sb_ss...na%2Caps%2C264

konkretno ova antena: https://www.amazon.de/novero-dabendo...ds=lte+antenne
http://novero-antennas.com/en/

brzina je skocila sa 2-4Mbit na 24-28Mbit

moras samo obratiti paznju za koju ti tocno freq. treba antena, probaj kontaktirati providera i saznati na kojoj freq. salje signal
ako ti podatke neda provider, onda probaj preko HAKOMa saznati, daj im tocnu lokaciju, oni bi morali imati te podatke
https://www.hakom.hr/UserDocsImages/...e_20151117.pdf

Zadnje izmijenjeno od: MasterX. 03.08.2016. u 15:55.
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Staro 03.08.2016., 22:03   #8
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Sudeći po podacima o dobiti(dBi) tih antena previše lažu.
-Logaritamske jesu širokopojasne pa pokrivaju više mobilnih freq. bandova i odnos naprijed/nazad je oko 25dB ali pojačanje nemože biti veće od 10dB.
- Panel antene barem ove u ponudi na toj stranici nemaju više od 10dB a mogu oblikom dipola biti širokopojasne ali ne za više od dva banda.
- Yagi nemože više od jednog banda ali ima mogućnost većim brojem elemenata (> 20) dobit do 20dBi.

ps:
U pozicijama gdje se od prepreke, zgrade, brdo itd. nevidi odašiljač su često kružne (omni) antene bolje od usmjerenih osim kad se može koristiti neki reflektor bio on home-made kao što reče Nikky ili neka fasada zgrade pod dobrim kutem.
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Staro 03.08.2016., 23:38   #9
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Sto se reflektora tice, jel dovoljno zavariti glatku metalnu plocu na drzac i igrati se s kutevima?

Alternativno koliko ima smisla pasivni repeater na vrhu brda sloziti, znaci dve antene back-to-back direkt spojiti?
Prema tornju okrenuti usmjerenu LPDA (ili ako nadjem yagicu sa vecim gainom), a prema kuci okrenuti sektorku?
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PSU: Silverstone SST-ST60F-P Corsair VX450
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Model: HP Z420
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VGA: Nvidia
HDD(OS): Seagate ST500DM002 500GB
HDD(local storage): 2x WD WD5000AAKX (RAID1@C600 SAS/SATA ctrl)
Display: 2x HP LA2205wg 22" @ 1680 x 1050
OS: Windows 7 Enterprise x64


Model: HP Elitebook 8570
CPU: Intel i5 3360M
Chipset: Intel Ivy Bridge
RAM: 2 x 8 GB DDR3-800 (PC3-12800)
VGA: Intel HD4000
HDD: Samsung SSD 850Pro 512GB
ODD: DVD+/-RW
Display: 15.4" (1366 x 768)
Other: Fingerprint reader
OS: Windows 7 Enterprise x64

Input:
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MBO: GA-P35-DS3P (rev. 2.0)
CPU: Intel C2Q Q6600 @ 2.4 GHz
RAM: 4 x 2 GB DDR2-800 @ 533 MHz
VGA: ATI Rage 3D @ PCI
HDD(OS): Seagate ST380815AS 80GB / Seagate ST3500418AS 500GB
HDD(storage01): 2x WD RE WD4000FYYZ 4TB (RAID10,f2@mdadm)
HDD(storage02): WDC WD20EARX-00P 2TB
HDD(storage_cctv): Seagate ST3250824AS 250GB
ODD: NEC DVD-RW ND-4551A
PSU: Corsair GS800
Display: -
LAN: Intel 82571EB @2x1Gbps LACP
Controllers: RS232 Oxford Semiconductor Ltd OXuPCI952
OS: Linux x64 (Ubuntu 14.04 LTS)


MBO: HP ProLiant DL120 G7
CPU: Intel Xeon E3-1220 @ 4x 3.10GHz
Chipset: Intel i875P-ICH5
RAM: 4 x 4096 MB DDR3-667 (PC3-10600)
HDD1: 2x MB2000EBUCF HUA723020ALA640 2TB 7200RPM (RAID1@P410)
Display: -
LAN: 82574L @ 1000Mbps FD
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MBO: ASRock 4Core1333-FullHD
CPU: Intel Core 2 Duo E84000 @ 3.0 GHz
Chipset: ATI RS600+SB600
RAM: 1 x 512 MB DDR2-800
VGA: -
HDD: Seagate 500GB
ODD: DVD-RW
PSU: Corsair VX450(?)
Display: Panasonic TH-50PY800
LAN: @1Gbps FD
OS: Windows 8.1 Pro x64

Input:
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MBO: Intel D201GLY2 (ITX)
CPU: Intel Celeron 220 @ 1.2GHz
Chipset: SiS662
RAM: 1 x 512 MB DDR2-533
VGA: Intel
HDD: Sandisk 1GB CF @ CF2IDE
ODD: -
PSU: miniITX type(?)
Display: -
LAN1-Uplink: @1000Mbps FD
LAN2: @100Mbps FD
OS: Mikrotik OS 6.28



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cat.7 - where crosstalk is not an issue anymore.
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Staro 04.08.2016., 00:01   #10
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U principu oboje bi moglo igrati, drugi prijedlog je bolji ali zato i skuplji.
Bilo bi zgodno kad bi imao priliku posuditi antene i probati.
Možda ti nešto od ovog da ideju:
http://www.instructables.com/id/DIY-...ster/?ALLSTEPS
http://whirlpool.net.au/wiki/homemade_yagi
https://www.hamradioforum.net/thread...peater-Project
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Staro 04.08.2016., 11:49   #11
D/G
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"Sto se reflektora tice, jel dovoljno zavariti glatku metalnu plocu na drzac i igrati se s kutevima? "

Reflektor nemora biti od punog metala, može biti i metalna mreža sa manjim "okama" kao što su na paraboličnim antenama "grid" za preko 2GHz. Problem je što to treba biti bar 2x2m ili ako je preko 100m daleko i veći reflektor jer je bit da tvoja antena od kuće što većim djelom em-zračenja upadne na njega pa antena treba biti sa što većom dobiti (>dBi) čime se i kut zračenja dovoljno smanji .
Jednostavno razmišljaj kao da se radi o usmjerenoj baterijskoj lampi a reflektor zamisli kao ogledalo
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