microwave link design

[mentamide]

need ko din ng help for the MW design namin....meron na kami site...PT 2 PT lang naman e...kaso the main problem.....ndi ko alam ung ibang procedures....proposal pa lang namn e.....ano ba mga info pag ang gusto kong iprovide sa LInk na yun ay VIdeo Call?? pa help naman....noob ako sa MW design e....

[bLacK_aNgeL]

kelangan mo po ng map, frequency na ggamitin nio. ung frequency me corresponding distance po yan..

[bLacK_aNgeL]

i found this link on the net http://www.microwaves101.com/ i hope it would help you

[mentamide]

thx a bunch mam...makakatulong sa design 2..

[bLacK_aNgeL]

welcome po

[labgruppen]

hehehe..meron po b kaung specific procedures pra gumwa n2..and if ok lng po pwde paview ng finished product...d ko nmn po kokpyahin since may assigned location po kme..and ang location q po is from pampanga to aurora..nid ko lng po ng help at reference sna...tnx..(sa pgwa po ng microwve link design)

first you will need to identify your the specific location of your "end-points". Pampanga and aurora are both large provinces.
after identifying your "end-points", plot them in your topomap. you could join the two poins with a straight line for the "ideal" path.
using your map's scale, divide the line into 40-60 km segments. the division points will be your "ideal" repeater station locations.  now check the path of each segment if there are obstructions. You may have to search the highest peaks to place your station to avoid obstructions. Repeat for all segments. For your area, the "known" and widely used repeater points points are, Cuyapo; San Jose; Dalton;
That's basically it.
Kung wala pa kayong radio, I recommend this..
http://www.dct.cz/support/files/3000s.pdf  This brand has been proven in the philippines. It can even handle a 90km over the sea link very reliably..

hope this helps.

[labgruppen]

need ko din ng help for the MW design namin....meron na kami site...PT 2 PT lang naman e...kaso the main problem.....ndi ko alam ung ibang procedures....proposal pa lang namn e.....ano ba mga info pag ang gusto kong iprovide sa LInk na yun ay VIdeo Call?? pa help naman....noob ako sa MW design e....

regardless of traffic, pareho pa rin ang procedures. just do first the microwave design and use SDH-microwave radio. NEC DMR-3000s is ok.
For the video call, just add ISA cards for your SDH multiplexer. These ISA cards will accept IP traffic directly. Then use IP based video conferencing equipment, such as CISCO Telepresence. Kung E1 traffic lang ang acceptable sa equipment ninyo, use routers equipped with E1 cards at both ends then feed your IP based video conferencing equipment.

[gehcen]

waw labgruppen, sobrang tnx s mga cnb mo..astig..meron n akong topog map..ang gnmit ko nlng po ung google earth since d nmn daw po kme required na gummit ng topog map..pero magbubuy dn aq pra sure..tpos ask ko lng how to pick for the best frequency to be used...sensya po mejo noobs tlga ako sa MW design..

[labgruppen]

waw labgruppen, sobrang tnx s mga cnb mo..astig..meron n akong topog map..ang gnmit ko nlng po ung google earth since d nmn daw po kme required na gummit ng topog map..pero magbubuy dn aq pra sure..tpos ask ko lng how to pick for the best frequency to be used...sensya po mejo noobs tlga ako sa MW design..

usually yung sa frequency, tradeoff yan.. higher frequency means higher antenna gain for the same antenna size. yun nga lang, tataas naman ang rain and other losses mo. tapos depende pa kung anong available na frequency  sa link location, lalo na pag marami na ang stations dun. Dito nagco-conduct ng RFI survey to see which frequencies are used to avoid interfering with other users. I've commissioned links with frequencies as low as 4Ghz and as high as 13Ghz (even as high as 26Ghz for short haul mini links) and I can say from those links that the "majority" is at around 6Ghz-8Ghz.

[mentamide]

thx talga....at nakagawa ako! wahhahaha.....3G ata ung amin...kahit may 4G na...wahahah.......

[rdpzycho]

^ ok lang 'yun, kare-release lang naman ng 4G, 9 years pa lang ang 3G at based sa trend from 1G to 2G, 10 more years pa bago magkakaroon ng peak volume sa units na 3G ang gamit. kumbaga, bata pa ang 3G at batang-bata pa ang 4G. mga 20 years pa raw bago magkakaroon ng peaking ang 4G.

based 'yan sa statistics ng Qualcomm na isa sa major provider ng chipsets for mobile communications.

[bLacK_aNgeL]

congrats! nkagawa kna ng design mo..

[gwizelli]

regardless of traffic, pareho pa rin ang procedures. just do first the microwave design and use SDH-microwave radio. NEC DMR-3000s is ok.
For the video call, just add ISA cards for your SDH multiplexer. These ISA cards will accept IP traffic directly. Then use IP based video conferencing equipment, such as CISCO Telepresence. Kung E1 traffic lang ang acceptable sa equipment ninyo, use routers equipped with E1 cards at both ends then feed your IP based video conferencing equipment.

hi po! ask ko lang po if may connection po ung sa transmission line loss.. may connection po ba un sa attenuation guide? at ung sdh po ba.. ok po ba sya for 7 ghz?

[labgruppen]

hi po! ask ko lang po if may connection po ung sa transmission line loss.. may connection po ba un sa attenuation guide?

yung transmission line loss, you can check with the specs of your feeder or waveguide. it is usually expressed in dB/100m. you will also have to include other losses such as connectors, and flex-twist sections.

at ung sdh po ba.. ok po ba sya for 7 ghz?

yup. check this out.. http://www.dct.cz/support/files/3000s.pdf  Long haul applications from 4GHz to 11Ghz. I know at least 3 Telecom companies in the Philippines with SDH links at 4-11GHz and they use NEC DMR-2000 and DMR-3000..
Some SDH short haul links (usually BTS links) are up to 20-30+GHz.

hope this helps.

[mentamide]

Yah....check the specs. of the wave guide...........ang ginamit ko nga palang OF sa 3G at 3GHz...hahaha

[gehcen]

maraming slmat s lht ng tumulong tpos ko n dn ung akin..for documentation nlng..anyway, cno po sanyo maY kakilala sa tv stations specifically sa broadcasting department..may proj po kase kame magpapakita ng design ng analog tv design ung prang microwave design dn sya e prang ung studio to transmitter tpos transmitter to tv tpos may link dugets dn..pls i badly need some help sa friday na po kase ung presentation..this coming 08/29.10..tnx po..pls help me huhuhu..

[ken16]

ano pong magandang kunin na site para sa microwave design?

[rdpzycho]

'yung patag lang para isa lang ang height sa profile.