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whitestargh
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62km Link - advice required

Mon Dec 17, 2012 6:25 am

Hello Folks.

I will be setting a 62km link this morning to link one of my clients remote site. I intend to use the following equipment and parameters.

2 RB435UAH boards (one at each end)
2 DBii F50N Pro mini pci wireless cards
2 32dbi Parabolic Mimo dishes (L-com 4900 - 5800)

I have the following frequencies available - 4980MHz, 5460MHz or 5800MHz (assuming a channel width of 10MHz)
Questions
1. Assuming the setup like the scrrenshot of radiomobile plan attached - which frequency would be good.?
2. What level should I tune the tx-power of the radio cards.?
3. What is the expected throughput of this link?

Due to limitaton on site B (right side) we are not able to go above tower height of 48m.

Advice and guidance will be very much appreciated
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samsung172
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Re: 62km Link - advice required

Mon Dec 17, 2012 10:22 pm

this link should not be good, since you are blocking the fresnell sone.
 
InoX
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Re: 62km Link - advice required

Tue Dec 18, 2012 1:07 am

1. try every channel and see, 5460MHz is more usable for most antennas;
2. leave them default, best solution;
3. I calculate the signal to around -60 to -65, so for 10Mhz I don't think the speed will be over 30mbps, maybe less; you could use 20Mhz.
Inform us about the link when is done.
 
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saintofinternet
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Re: 62km Link - advice required

Tue Dec 18, 2012 3:58 am

is this link setup???
by professionals, for professionals....
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whitestargh
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Re: 62km Link - advice required

Wed Dec 19, 2012 12:10 am

Hi Folks

The link is up now. I will post details with pictures tomorrow. Signal is now -69 but we need to do some alignment at one side.

I noticed the ethernet cable running from the parabole on the 73m tower is loosing power: that is when we ping with a packet size of 1500 the routerboard - 435UAH - reboots running at processor speed of 400MHz. its supplied with 24V ubiquity POE. I will run direct power to the top of the tower tomorrow and test again.
 
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saintofinternet
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Re: 62km Link - advice required

Wed Dec 19, 2012 3:02 am

Hi Folks

The link is up now. I will post details with pictures tomorrow. Signal is now -69 but we need to do some alignment at one side.

I noticed the ethernet cable running from the parabole on the 73m tower is loosing power: that is when we ping with a packet size of 1500 the routerboard - 435UAH - reboots running at processor speed of 400MHz. its supplied with 24V ubiquity POE. I will run direct power to the top of the tower tomorrow and test again.

will surely await for the pictures :-)

why are you using Ubiquiti POE on a Routerboard??
by professionals, for professionals....
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InoX
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Re: 62km Link - advice required

Wed Dec 19, 2012 12:14 pm

why are you using Ubiquiti POE on a Routerboard??
Why not?
Check the specs to one from ubnt and then check one from mikrotik.
You will answer yourself.
 
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saintofinternet
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Re: 62km Link - advice required

Thu Dec 20, 2012 3:07 am

Hi Folks

The link is up now. I will post details with pictures tomorrow. Signal is now -69 but we need to do some alignment at one side.

I noticed the ethernet cable running from the parabole on the 73m tower is loosing power: that is when we ping with a packet size of 1500 the routerboard - 435UAH - reboots running at processor speed of 400MHz. its supplied with 24V ubiquity POE. I will run direct power to the top of the tower tomorrow and test again.

waiting for the link details for that distance :-)
by professionals, for professionals....
Don't forget to give KARMA!!!
 
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mahnet
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Re: 62km Link - advice required

Thu Dec 20, 2012 8:08 pm

Ubiquity POE is 0.5A and Mikrotik recommends 1.5A with its 24V adapters (atleast 1A) hence u might loose power and going for a tower 73mtr is too high to run a ethernet cable.

You have to try different channels and freq. to best test the radio sets.It varies a lot on your landscape and environmental conditions.
I have 2 links 50 km each ...1 runs over a river and the other over land(fields). The first link ha signal -70/75 during day and goes to -77/85 during night. The second link has -70/72 signal in day and goes to -63/62 during night. I do not know why this happens. Tower height is 40 mtr at one end and 24 mtr at the other for both links. Using 27dbi grids with 411ah & r5shpn.
 
whitestargh
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Re: 62km Link - Please Advice -Pictures Attached

Thu Dec 20, 2012 10:51 pm

Ok as promised find attached pictures. as you can see from the capacity test link is not that very good since the variance in the results is large.

I noticed the is a correlation between the master / slave roles and the download and upload results. That is the side which is AP has least download etc.

The radios are currently running at 22dbm tx-power. at some point the signal was -56.

regards
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InoX
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Re: 62km Link - advice required

Thu Dec 20, 2012 11:38 pm

Use nv2 for more stable results.
 
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saintofinternet
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Re: 62km Link - advice required

Fri Dec 21, 2012 3:10 am

what tool have you used for capacity test??

yes use NV2 and i think shift the frequency from 4980 MHz to above 5200 MHz.
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ohara
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Re: 62km Link - advice required

Fri Dec 21, 2012 9:32 am

How much did you invest to erect the mast?
 
whitestargh
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Re: 62km Link - advice required

Fri Dec 21, 2012 10:11 am

what tool have you used for capacity test??
I use the visualware "myconnection server" together with their access series devices. Basically i put the access series at each end of the link and do a host of tests (udp capacity, ping, video, voip etc). One device as slave tests to the master and all results sent to the server for analysis. Very good application.

http://www.myconnectionserver.com/learn ... ality.html

yes use NV2 and i think shift the frequency from 4980 MHz to above 5200 MHz.

why do you want me to use 5200MHz - any reasons.

I have changed to link to NV2. Will send the results in the evening. My only dislike for NV2 is the latency. But at this point i have no option since the variance in results from nstreme is too much.
 
InoX
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Re: 62km Link - advice required

Fri Dec 21, 2012 12:21 pm

ping is lower once traffic goes up with nv2. With nstreme is reverse.

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