NetMetal5 Preformance (?)

RouterOS Wireless Networking
1

Hi guys,

I have established a PTP link using NetMetal5 and mANT30.

General Profile:

PTP 10 KM. 6.5K are over River and the rest over land.
Full CLOS

Requirement:

Need to transport 200 Mbps of throughput.

Problems:

I have done a frequency usage scan and I found 0% freq. use from 5010 to 5090 and 5920 to 6100 MHz. Noise floor average -112/-113

I will attach 3 sampling at different freq.

Please advice what should I do to improve this. I would attach more, but maximum are 3 files.

Thank you very much.

2

If you have default tx power then you need to better align antenna

On 10km your signal should have at least -40 or better

3

Thanks for responding.

I do have tx power by default. What power level do you advice to establish? and should it be in all fixed rates or card rates mode?

Thanks again.

4

With AC-Radios work only with “all rates fixed” but your main problem is alignment

If your link is with perfect line of sight (and free fresnel zone) then they are just bad aligned

Make correct alignment and see (using the default tx power) what you get

5

Bear in mind you’re using the ends of useable frequencies, where the antenna will provide less gain. What signal do you get if you use a channel between 5400-5700 for a moment?

6

I believe I have done the testing in that freq. range, but signal-strength-levels get worst. I have also done a freq. usage those where the results.(attached)

7

Thank you - I did not know that AC-Radios works only on all rates fixed. However, I still need to know what tx-power should I establish on each radio?

Re-alignment efforts will be done again by Monday. We have struggled a lot yesterday, we improved signal-strength a bit but more less same results.

Thank you again.

8

This might sound wierd… but set your antenna gain to 0.

I have found this setting to allow for the radios to push out the most power (within safe limits). This then allows for better signal strength.

Let me know what your findings are. I’m getting 130mb+ with this setting over a 17km link. I think I should be getting more as there is only water in between the two links and both radios are almost 40ft off the ground.

9

Ok, I can try this when getting back to those links - but how is this possible ? On the other hand, since this link is located in a very rural place, power limits are not a problem - we can use maximum power possible

10

tcp testing starve cpu resources, directly from radios test only using udp

if you wan to test using tcp you need more powerfull devices doing the test

for example using two rb951g (600mhz 74kc cpu) overclocked to 750mhz in udp 1500byte test over wired gigagit thernet you can obtain:

udp test 530mbps
tcp test 135mbps