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LHG 60G experience

Posted: Thu Apr 19, 2018 1:12 pm
by Insider
How are we going there? Pretty good by the way! Heavy porn!

We are having installed link for 1200m, pretty good and clear link, I hadn't believed it, but this piece of metal really kicks ass!!

Ok this is CLI of 6.43, so you need not to ask, WTH is that..

connected: yes
frequency: 58320
remote-address: 30:07:4D:XX:XX:XX
mcs: 8
phy-rate: 2.3Gbps
signal: 80
rssi: -59
tx-sector: 15
tx-sector-info: right 1.4 degrees, down 1 degrees
rx-sector: 96


How about you?

Re: LHG 60G experience

Posted: Thu Apr 19, 2018 2:24 pm
by mlenhart
How were you able to obtain it? AFAIK it is not in sale anywhere in europe yet...
Your comment is highly expected :)

Re: LHG 60G experience

Posted: Thu Apr 19, 2018 2:28 pm
by normis
Nice comments, thanks! I'm glad to see it works as expected.

Re: LHG 60G experience

Posted: Thu Apr 19, 2018 2:29 pm
by mlenhart
Ok this is CLI of 6.43, so you need not to ask, WTH is that..
6.43???

Re: LHG 60G experience

Posted: Thu Apr 19, 2018 2:37 pm
by Insider
Simply we posses those without any comments,

Re: LHG 60G experience

Posted: Thu Apr 19, 2018 2:42 pm
by Insider
Ok this is CLI of 6.43, so you need not to ask, WTH is that..
6.43???
Ooops?

Re: LHG 60G experience

Posted: Thu Apr 19, 2018 3:00 pm
by blingblouw
I am very jealous.

Our distributors have no idea when they are getting. Damn

Re: LHG 60G experience

Posted: Thu Apr 19, 2018 9:29 pm
by MonkeyDan
That's awesome! Love the PHY rate and alignment info. How does it handle the rain?

Re: LHG 60G experience

Posted: Fri Apr 20, 2018 9:47 am
by server8
Hope to have soon a feedback in a rainy day :-)

Re: LHG 60G experience

Posted: Mon Apr 23, 2018 4:27 pm
by Insider
Hope to have soon a feedback in a rainy day :-)
Rain rain rain.. We need more real live testing. But.. Todays situation about 40-45mm/h link was down for 4 minutes going from -56 to -70 in few seconds. The wet antenna takes -4dB!! Link length 1300m.
The link nearby with WAP for 400m was doing well all the time loosing approxiamtely 1-2 on RSSI scale looding from -66 to -68, and already working as before the rain. LHG is 15 minutes after rain still -59 and once dry has to come up to -56.

Re: LHG 60G experience

Posted: Mon Apr 23, 2018 6:28 pm
by server8
Thank you for the feedback

Re: LHG 60G experience

Posted: Wed Apr 25, 2018 8:27 pm
by manuzoli
Where did you buy them?

Re: LHG 60G experience

Posted: Thu Apr 26, 2018 12:48 pm
by Insider
Where did you buy them?
Sorry, no comment

Re: LHG 60G experience

Posted: Fri Jun 22, 2018 11:48 pm
by mlenhart
400m link, ROS 6.42.4:

1st side:
[admin@MikroTik] > /interface w60g monitor 0
connected: yes
frequency: 58320
remote-address: XX:XX:XX:XX:XX:XX
mcs: 8
phy-rate: 2.3Gbps
signal: 95
rssi: -53
tx-sector: 45
tx-sector-info: right 0.6 degrees, up 0.6 degrees
rx-sector: 96

2nd side:
[admin@MikroTik] > /interface w60g monitor 0
connected: yes
frequency: 58320
remote-address: XX:XX:XX:XX:XX:XX
mcs: 8
phy-rate: 2.3Gbps
signal: 70
rssi: -64
tx-sector: 58
tx-sector-info: left 0.6 degrees, up 1.4 degrees
rx-sector: 96

MCS and also signal is VERY unstable when link is under load, signal is jumping between 20 to 100 approx. each second, same as MCS - between 1 up to 8
Also, after a load, MCS will remain at low values 1-2 same as signal - from 80 before load to only 20 after a load

Re: LHG 60G experience

Posted: Sat Jun 23, 2018 2:07 pm
by mistry7
@mlenhart

try 6.43 RC there are a lot of improvements

Re: LHG 60G experience

Posted: Sun Jun 24, 2018 12:22 am
by mistry7
Here our results on first long link

Re: LHG 60G experience

Posted: Wed Jun 27, 2018 4:24 pm
by brasileottanta
Hello ,

our first long link. Great !!! firmware 6.42.5

Re: LHG 60G experience

Posted: Wed Jun 27, 2018 6:03 pm
by mistry7
Hello ,

our first long link. Great !!! firmware 6.42.5
Try to set channel to 64800 in CLI, the attenuation in O2 is smaller in higher frequency

Re: LHG 60G experience

Posted: Wed Jun 27, 2018 7:58 pm
by blue
Wow, this looks promising for my future 2100 meters link :)


Sent from my iPhone using Tapatalk

Re: LHG 60G experience

Posted: Wed Jun 27, 2018 8:56 pm
by server8
Mistry7 remember report us from rainy days :-)
Here our results on first long link

Re: LHG 60G experience

Posted: Thu Jun 28, 2018 11:10 am
by brasileottanta
Hello ,

our first long link. Great !!! firmware 6.42.5
Try to set channel to 64800 in CLI, the attenuation in O2 is smaller in higher frequency
Hi ,
How I can do that ? manually ?



thanks

brasileottanta

Re: LHG 60G experience

Posted: Sun Jul 01, 2018 3:42 pm
by mistry7
Hello ,

our first long link. Great !!! firmware 6.42.5
Try to set channel to 64800 in CLI, the attenuation in O2 is smaller in higher frequency
Hi ,
How I can do that ? manually ?



thanks

brasileottanta
@brasileottanta
open terminal in winbox
go to

interface w60g
set 0 frequency=64800

Re: LHG 60G experience

Posted: Sun Jul 01, 2018 3:44 pm
by mistry7
Mistry7 remember report us from rainy days :-)
Here our results on first long link
the next 20 days no rain

Re: LHG 60G experience

Posted: Fri Jul 06, 2018 9:49 am
by server8
Now during heavy downpour our 1491m link gained from 2 to 5 db both side, frequency 64800, WOW :-)

Re: LHG 60G experience

Posted: Fri Jul 06, 2018 10:37 am
by server8
I have to correct partially myself it's no rained on the link but very very close, the strange think that this morning we gained a lot of db before rain start, and now with light rain the signal is from slightly better than normal to 4 db worst

Re: LHG 60G experience

Posted: Fri Jul 06, 2018 10:47 am
by server8
Now light rain stopped signal gained around 2/3db

frequency: 64800
mcs: 8
phy-rate: 2.3Gbps
signal: 80
rssi: -57
tx-sector: 48
tx-sector-info: left 1.4 degrees, up 1 degrees
rx-sector: 96
distance: 1491.42m

frequency: 64800
mcs: 8
phy-rate: 2.3Gbps
signal: 80
rssi: -57
tx-sector: 48
tx-sector-info: left 1 degrees, up 1.4 degrees
rx-sector: 96
distance: 1491.42m

Re: LHG 60G experience

Posted: Fri Jul 06, 2018 12:27 pm
by mistry7
I hope Mikrotik update there Site Survey Tool,
the wireless wire dish is choosable, but there is no 60Ghz Band to choose.
Hopefully we are able to calculate rssi , that i think is best way to know what finally alignment
gives us.

We don´t know LHG gain, we don´t know Output Power, we know nothing....
How to probably do alignment if we don´t know the goal rssi?

Re: LHG 60G experience

Posted: Thu Jul 12, 2018 8:00 am
by normis
I hope Mikrotik update there Site Survey Tool,
the wireless wire dish is choosable, but there is no 60Ghz Band to choose.
Hopefully we are able to calculate rssi , that i think is best way to know what finally alignment
gives us.

We don´t know LHG gain, we don´t know Output Power, we know nothing....
How to probably do alignment if we don´t know the goal rssi?
You don't need to calculate anything. The distance limit is specifically indicated. If you have clear line of sight, link will work. 60GHz is completely different from 2GHz, so the traditional calculators will not be useful.

Re: LHG 60G experience

Posted: Thu Jul 12, 2018 8:47 am
by cohprog
You don't need to calculate anything. The distance limit is specifically indicated. If you have clear line of sight, link will work. 60GHz is completely different from 2GHz, so the traditional calculators will not be useful.

Over a few hundred meters, 60Ghz links are heavily dependent of rain condition. So yes, a link calculator based on ITU rain zone calculator is really needed. It's not perfect but it will still give an indication if you can expect the link to stay-up nearly always or if it will drop as soon as there is some rain.

Image

You rate them for 1.5Km but under which condition? Perfect clear weather with little humidity in the air? Will it works with a reduced speed when raining or will it stop working all together because there is simply no margin at this distance? With other devices, I saw drop of 15-20dB on links over 1Km during storm. Those links stayed up but because there was a lot of margin. There is just no way to know if it will be the same for LHG60 without testing because we don't have any information about the expected signal level at a given distance under clear weather. If you say that a 1.5Km link should work with a rssi of -50 under clear weather, that's not at all the same as if you say it should have a rssi of -65. In the first case, you know that it should continue working even with some rain. In the second case, the link is probably going to drop.

A link calculator is also usefull to know if a new link is working more or less as expected or if there is really a problem with the installation.

Re: LHG 60G experience

Posted: Thu Jul 12, 2018 9:06 am
by ste
You don't need to calculate anything. The distance limit is specifically indicated. If you have clear line of sight, link will work. 60GHz is completely different from 2GHz, so the traditional calculators will not be useful.

Over a few hundred meters, 60Ghz links are heavily dependent of rain condition. So yes, a link calculator based on ITU rain zone calculator is really needed. It's not perfect but it will still give an indication if you can expect the link to stay-up nearly always or if it will drop as soon as there is some rain.

Image

You rate them for 1.5Km but under which condition? Perfect clear weather with little humidity in the air? Will it works with a reduced speed when raining or will it stop working all together because there is simply no margin at this distance? With other devices, I saw drop of 15-20dB on links over 1Km during storm. Those links stayed up but because there was a lot of margin. There is just no way to know if it will be the same for LHG60 without testing because we don't have any information about the expected signal level at a given distance under clear weather. If you say that a 1.5Km link should work with a rssi of -50 under clear weather, that's not at all the same as if you say it should have a rssi of -65. In the first case, you know that it should continue working even with some rain. In the second case, the link is probably going to drop.

A link calculator is also usefull to know if a new link is working more or less as expected or if there is really a problem with the installation.
With this kind of gear and this pricing it is best to do some labour and test it for yourself. Do a testlink and see how it behaves and how the signals fluctuate with rain/snow.

Re: LHG 60G experience

Posted: Thu Jul 12, 2018 4:40 pm
by cohprog

With this kind of gear and this pricing it is best to do some labour and test it for yourself. Do a testlink and see how it behaves and how the signals fluctuate with rain/snow.

Sorry but that's not a good enough excuse not to provide any information. Depending where you are located, it's not that easy to set-up a test link. I agree those devices are very cheap but I would rather avoid wasting time if I could know in advance that there is no hope to get a stable link in a given situation.

I have links I know will work with Metrolinq devices but, if some of the values posted here with LHG60 are the best that can be done, there is nearly no hope to achieve the same results with the LHG60. Based on those data only, I am rather doubtful about spending the time (and money) to do a test that will probably fail. I may rather go directly with a solution that I know will work. If Mikrotik was publishing some data, we would at least have an idea if there is a point in making a test or if it's hopeless.

Based on Ignitenet information, the Metrolinq need a RSSI of -60 for 2Gbps and -65 for 1Gbps. Still based on their data, you can expect (with ML-60-35) a RSSI of -50 at 1.5Km without rain. It's easy to see that you have some margin left. Now, if -65 is really what you can expect of a LHG60 at 1.5Km when not raining, that mean there is nearly no margin at all. If that's the case, it's just not worth to even make a test for that distance

Even if you do a test, without any data there is no way to know if the results you are getting are what is expected or if there is a problem with the setup. There is a reason why people are making threads asking people to post results of their installations.

On a side note, Ignitenet claims 2.2Km for 2Gbps and 2.6Km for 1Gbps when no rain.

PS: Those values are for channel 4. For channel 1, the expected RSSI of ML-60-35 is -63. The maximum distance for 2Gbps drop at 1350m without rain and the distance for 1Gbps to 1620m. That's quite a difference between the 2 channels.

Re: LHG 60G experience

Posted: Thu Jul 12, 2018 5:01 pm
by ste

With this kind of gear and this pricing it is best to do some labour and test it for yourself. Do a testlink and see how it behaves and how the signals fluctuate with rain/snow.

Sorry but that's not a good enough excuse not to provide any information. Depending where you are located, it's not that easy to set-up a test link. I agree those devices are very cheap but I would rather avoid wasting time if I could know in advance that there is no hope to get a stable link in a given situation.

I have links I know will work with Metrolinq devices but, if some of the values posted here with LHG60 are the best that can be done, there is nearly no hope to achieve the same results with the LHG60. Based on those data only, I am rather doubtful about spending the time (and money) to do a test that will probably fail. I may rather go directly with a solution that I know will work. If Mikrotik was publishing some data, we would at least have an idea if there is a point in making a test or if it's hopeless.

Based on Ignitenet information, the Metrolinq need a RSSI of -60 for 2Gbps and -65 for 1Gbps. Still based on their data, you can expect (with ML-60-35) a RSSI of -50 at 1.5Km without rain. It's easy to see that you have some margin left. Now, if -65 is really what you can expect of a LHG60 at 1.5Km when not raining, that mean there is nearly no margin at all. If that's the case, it's just not worth to even make a test for that distance

Even if you do a test, without any data there is no way to know if the results you are getting are what is expected or if there is a problem with the setup. There is a reason why people are making threads asking people to post results of their installations.

On a side note, Ignitenet claims 2.2Km for 2Gbps and 2.6Km for 1Gbps when no rain.

PS: Those values are for channel 4. For channel 1, the expected RSSI of ML-60-35 is -63. The maximum distance for 2Gbps drop at 1350m without rain and the distance for 1Gbps to 1620m. That's quite a difference between the 2 channels.
I have some Ignite links. I never get calculates values. Often they fluctuate or are far off. Their scope is crap (enough for a first shot but far from beeing exact) and a lot of their gear need to be replaced. So dont expect from wifi-based cheap gear to match the calculations (as you get with expensive licensed gear). Even the production tolerance might kill your calculations (Just see an open ignitenet and you know why. Clipped in USB-Stick ... ).

This Ignitenet claims are ... puh. Just do it ... This is why I say what you test is what you get.

Re: LHG 60G experience

Posted: Thu Jul 12, 2018 5:23 pm
by cohprog
I have some Ignite links. I never get calculates values. Often they fluctuate or are far off. Their scope is crap (enough for a first shot but far from beeing exact) and a lot of their gear need to be replaced. So dont expect from wifi-based cheap gear to match the calculations (as you get with expensive licensed gear). Even the production tolerance might kill your calculations (Just see an open ignitenet and you know why. Clipped in USB-Stick ... ).

This Ignitenet claims are ... puh. Just do it ... This is why I say what you test is what you get.

Nobody ever claimed that the scope is good enough for alignement. It's only useful to point the antenna at each others so they will at least establish a link that will let you do alignement. You can do without but, imho, at 1km+ it makes things easier.

I am not expecting to get the exact theoretical values but a rough idea is a lot better than nothing. I have several Metrolinq lines and the values aren't that far off. Perhaps they are cheap gear, as you say, but I haven't got a single one that failed yet and the links, all between 1Km and 1.3Km never droped even during storm. But I did saw them go from 2.5Mbps to 1Mbps for a few minutes in the worse cases. As it is, I am perfectly happy with those devices which is why I am doubtful into investing money and time into something that seems to have nearly no chance of working (based on the few results that people posted as there is nothing official from Mikrotik).

How hard is it to list the signal needed for a few speed rates and what RSSI you "may" expect based on the distance? Answering "they are rated for 1.5Km so they will work at this distance" is just plain false: we all know that it heavily depend of weather condition, whatever the gear you are using.

Re: LHG 60G experience

Posted: Thu Jul 19, 2018 4:51 pm
by cohprog
Just installed a LHG 60G link:

Distance: 1160m
Alignment based on RSSI and not on led or TX sector info: I could systematically gain 4-5 dbm over a "center" TX sector value. As some people pointed out, we really need to be able to disable beam forming for alignement: Sure, beam forming can compensate for some poor alignment but a correctly aligned link with beam forming beats a poorly aligned link with beam forming.

Side A:
frequency: 64800
mcs: 8
phy-rate: 2.3Gbps
signal: 85
rssi: -55
tx-sector: 55
tx-sector-info: right 1.4 degrees, up 1 degrees
rx-sector: 96
distance: 1166.34m

Side B:
frequency: 64800
mcs: 8
phy-rate: 2.3Gbps
signal: 80
rssi: -58
tx-sector: 56
tx-sector-info: left 1.4 degrees, up 1.4 degrees
rx-sector: 96
distance: 1166.36m

I am now waiting on the predicted storm this week-end to see how the link behave.

Comment:
- It was a lot easier to get a working link "by sight" than with Metrolinq 60-35. (Metrolinq have a much narrower beam)

- Fine alignement still need to be done based on signal, like with the Metrolinq.

- The LHG60 "mast bracket" is pretty crappy for 60Ghz. Even with the beam width of the LHG60, half a degree can make a difference of several dbm. We really need a bracket that let do fine adjustment once it's firmly fixed to the mast.

- The RSSI (and the tx-sector info) can vary quite a lot from one moment to another even with good weather and even with the link running since several hours, without touching the antenna. (The above data shows "left 1.4 degrees, up 1.4 degrees" but sometime it shows "center". The RSSI can vary from -57 to -61 on that link. -61 is when tx-sector shows "center")

- For a slightly longer link (1290m), at the same location, using the same frequency (64800), Metrolinq 60-35 reports a RSSI of -45 with nearly no variation (+/- 1dBm)

I will check how the link compare to the Metrolinq one during the upcoming thunderstorm.

PS: Can't people resize their pictures, before posting them, so they don't mess the whole page?

Re: LHG 60G experience

Posted: Thu Jul 19, 2018 5:39 pm
by ste
Just installed a LHG 60G link:

[...]
Comment:
- It was a lot easier to get a working link "by sight" than with Metrolinq 60-35. (Metrolinq have a much narrower beam)

- Fine alignement still need to be done based on signal, like with the Metrolinq.

- The LHG60 "mast bracket" is pretty crappy for 60Ghz. Even with the beam width of the LHG60, half a degree can make a difference of several dbm. We really need a bracket that let do fine adjustment once it's firmly fixed to the mast.

- The RSSI (and the tx-sector info) can vary quite a lot from one moment to another even with good weather and even with the link running since several hours, without touching the antenna. (The above data shows "left 1.4 degrees, up 1.4 degrees" but sometime it shows "center". The RSSI can vary from -57 to -61 on that link. -61 is when tx-sector shows "center")

- For a slightly longer link (1290m), at the same location, using the same frequency (64800), Metrolinq 60-35 reports a RSSI of -45 with nearly no variation (+/- 1dBm)

I will check how the link compare to the Metrolinq one during the upcoming thunderstorm.

PS: Can't people resize their pictures, before posting them, so they don't mess the whole page?
The dish sizes of Metrolinq 35 and LHG60 are quite the same. LHG is a bit wider. So I guess the RSSI difference is due to different TX power or different measurement of the chipset. The mesh antenna might be a factor but not that big. Would be interesting to compare how both modulate down with distance/weather.

Re: LHG 60G experience

Posted: Thu Jul 19, 2018 6:30 pm
by cohprog
The dish sizes of Metrolinq 35 and LHG60 are quite the same. LHG is a bit wider. So I guess the RSSI difference is due to different TX power or different measurement of the chipset. The mesh antenna might be a factor but not that big. Would be interesting to compare how both modulate down with distance/weather.

The size is about the same but the geometry is different. As I said, the Metrolinq have a much more focused beam. Getting 2 Metrolinq to link at 1km just by more or less pointing them at each others by sight is nearly impossible. I really doubt that both antenna have the same gain.

I will post the results after this weekend's storm. Both LHG60 and Metrolinq links are in the same area, with about the same length and on the same channel so it will be easy to compare them (in fact, both links are back to back).

Edit: I think the Metrolinq 60-35 have an antenna gain of 42 dBi and a max TX power of 14 dBm
Edit: I think that, in Europa, the max EIRP for 60Ghz is +55 dBmi with a minimum antenna gain of +30 dBi. In USA, it's a lot higher (+82 dBmi)

Re: LHG 60G experience

Posted: Thu Jul 19, 2018 7:32 pm
by vectieba
Here is my results from a 700m connection in good weather. It seems the rssi improved and the link was more balanced after putting load on the link. I also expected more throughput at that distance.
LinkTest700m.png

Re: LHG 60G experience

Posted: Thu Jul 19, 2018 7:52 pm
by antonsb
Here is my results from a 700m connection in good weather. It seems the rssi improved and the link was more balanced after putting load on the link. I also expected more throughput at that distance.

LinkTest700m.png
Currently You are testing one core performance - Use Traffic generator or generate traffic externally.

Re: LHG 60G experience

Posted: Thu Jul 19, 2018 8:10 pm
by vectieba
Thanks Anton, I was looking at the Hawaii link and realized that. Thanks, this is much better :D
LinkTest700m.png

Re: LHG 60G experience

Posted: Fri Jul 20, 2018 5:20 pm
by vectieba
Here is a second link we have put up at 1km
LinkTest1000m.png

Re: LHG 60G experience

Posted: Fri Jul 20, 2018 10:36 pm
by cohprog
First thunderstorm of the weekend. Here is the results:

LHG60 link:
Length: 1166m
Frequency: 64800
RSSI no rain: -55 to -58 dBm
Rate no rain: 2.3Gbps

Metrolinq 2.5 60-35 link:
Length: 1290m
Frequency: 64800
RSSI no rain: -45 dBm
Rate no rain: 2.5Gbps

Both links are in the same area so have the same weather conditions (they both end-up at the same location).

Results:
LHG60:
RSSI during "normal" rain: around -63 dBm
Rate during "normal" rain: 2.3Gbps. Sometime drop to 1.9Gbps
RSSI during "heavy" rain: Minimal recorded -71 dBm
Rate during "heavy" rain: Often around 1Gbps. Sometime as low as 390Mbps

Metrolinq:
RSSI during "normal" rain: -47 dBm
Rate during "normal" rain: 2.5Gbps
RSSI during "heavy" rain: Minimal recorded -57 dBm
Rate during "heavy" rain: 2.5Gbps

The good thing is that during this storm neither links disconnected (which is better than I expected). But the LHG60 rate dropped a lot for most of the storm while the Metrolinq rate stayed at a full 2.5Gbps during the whole time.

In nearly 1 year, I saw the Metrolinq RSSI drop down to as low as -65 dBm which resulted in some very brief rate drop (to 1.9Gbps or even 1Gbps for a few seconds). That's about 8 dBm less than during this storm. It's very probable that the LHG60 link would disconnect under the same condition as the RSSI would be around -79 dBm...

Imho, I wouldn't use LHG60 for links above 1Km except if you are in an area with very little rain or if you don't care about losing the connection from time to time...

Re: LHG 60G experience

Posted: Fri Jul 20, 2018 10:42 pm
by cohprog
Something weird I noticed: It stopped raining since around 30 mins and suddenly the LHG60 link dropped to MCS 1 even with a good RSSI (-55 dBm):
frequency: 64800
mcs: 1
phy-rate: 385.0Mbps
signal: 20
rssi: -55
tx-sector: 41
tx-sector-info: left 1 degrees, up 0.6 degrees
rx-sector: 96
distance: 1166.37m

The link stayed like that until I passed some heavy traffic through it and then it when back to more normal values:
mcs: 8
phy-rate: 2.3Gbps
signal: 80
rssi: -55
tx-sector: 47
tx-sector-info: right 1.4 degrees, up 0.6 degrees
rx-sector: 96
distance: 1166.36m

No idea what is causing that...

Re: LHG 60G experience

Posted: Sat Jul 21, 2018 12:06 pm
by ste
First thunderstorm of the weekend. Here is the results:

LHG60 link:
Length: 1166m
Frequency: 64800
RSSI no rain: -55 to -58 dBm
Rate no rain: 2.3Gbps

Metrolinq 2.5 60-35 link:
Length: 1290m
Frequency: 64800
RSSI no rain: -45 dBm
Rate no rain: 2.5Gbps

Both links are in the same area so have the same weather conditions (they both end-up at the same location).

Results:
LHG60:
RSSI during "normal" rain: around -63 dBm
Rate during "normal" rain: 2.3Gbps. Sometime drop to 1.9Gbps
RSSI during "heavy" rain: Minimal recorded -71 dBm
Rate during "heavy" rain: Often around 1Gbps. Sometime as low as 390Mbps

Metrolinq:
RSSI during "normal" rain: -47 dBm
Rate during "normal" rain: 2.5Gbps
RSSI during "heavy" rain: Minimal recorded -57 dBm
Rate during "heavy" rain: 2.5Gbps

The good thing is that during this storm neither links disconnected (which is better than I expected). But the LHG60 rate dropped a lot for most of the storm while the Metrolinq rate stayed at a full 2.5Gbps during the whole time.

In nearly 1 year, I saw the Metrolinq RSSI drop down to as low as -65 dBm which resulted in some very brief rate drop (to 1.9Gbps or even 1Gbps for a few seconds). That's about 8 dBm less than during this storm. It's very probable that the LHG60 link would disconnect under the same condition as the RSSI would be around -79 dBm...

Imho, I wouldn't use LHG60 for links above 1Km except if you are in an area with very little rain or if you don't care about losing the connection from time to time...
What is your tx-power setting for lhg60? I guess this makes the signal difference.

Re: LHG 60G experience

Posted: Sat Jul 21, 2018 3:04 pm
by cohprog
What is your tx-power setting for lhg60? I guess this makes the signal difference.
How should I know? Mikrotik didn't gave any information about those devices. In Europa, the max EIRP authorized is 55 dBmi with an antenna gain that need to be at least +30 dBi. Metrolinq has a TX power of 14 dBm. Any reason to believe that the LHG60 are set to less than that 14 dBm by default and that the default isn't the maximum they can do?

Nobody reported a better RSSI for LHG60 links at 1Km+ yet...

I am not sure why you say the only difference can only be the TX power when those antenna don't have at all the same geometry. Imho, the Metrolinq have a much higher gain, that's all.

Also, I am not sure the grid design is a good idea: As others reported, even when it stops raining, the RSSI stay much lower until the antenna dry. I don't have at all this problem with the Metrolinq radom.

Edit: I tried to set the tx-power manually instead of "default". The maximal value accepted is 15. I didn't noticed any change in RSSI so I guess the default must already be 15 or, perhaps, 14 (Which is the same as Metrolinq).

Re: LHG 60G experience

Posted: Sun Jul 22, 2018 12:27 pm
by ste
What is your tx-power setting for lhg60? I guess this makes the signal difference.
How should I know? Mikrotik didn't gave any information about those devices. In Europa, the max EIRP authorized is 55 dBmi with an antenna gain that need to be at least +30 dBi. Metrolinq has a TX power of 14 dBm. Any reason to believe that the LHG60 are set to less than that 14 dBm by default and that the default isn't the maximum they can do?

Nobody reported a better RSSI for LHG60 links at 1Km+ yet...

I am not sure why you say the only difference can only be the TX power when those antenna don't have at all the same geometry. Imho, the Metrolinq have a much higher gain, that's all.

Also, I am not sure the grid design is a good idea: As others reported, even when it stops raining, the RSSI stay much lower until the antenna dry. I don't have at all this problem with the Metrolinq radom.

Edit: I tried to set the tx-power manually instead of "default". The maximal value accepted is 15. I didn't noticed any change in RSSI so I guess the default must already be 15 or, perhaps, 14 (Which is the same as Metrolinq).
I cant believe the LHG Antenna is so much lower gain. I would expect no more than 3db difference which would be huge. But I dont have any data.
@MT could you please step in with some facts/data on Antenna Gain / TX Power.

Re: LHG 60G experience

Posted: Sun Jul 22, 2018 4:48 pm
by cohprog
I cant believe the LHG Antenna is so much lower gain. I would expect no more than 3db difference which would be huge. But I dont have any data.
@MT could you please step in with some facts/data on Antenna Gain / TX Power.

Considering how easy it is to set-up a LHG link "by sight", I am not really surprised. Also, the antenna shape/size can result is a much bigger gain difference in the 60Ghz than it would in the 5 or 2.4Ghz.

We really don't have any info about the max EIRP of the LHG so it's hard to say. Based on their spec, Metrolinq 60-35 max EIRP is 55-56 dBmi. Based on their link calculator, with those antenna, you should get a RSSI of -42 dBm at 1Km and -50dBm at 1.5km +/- 10% error margin (for channel 4 and no rain). From my experience, this is doable in practice. Nobody reported anything near those values with the LHG (yet).

Re: LHG 60G experience

Posted: Mon Jul 23, 2018 5:46 pm
by ste
New Link only aligned by sight. Needs fine adjustment:

> interface w60g monitor wlan60-1 once
connected: yes
frequency: 58320
remote-address: 04:D6:AA:XX:XX:XX
mcs: 8
phy-rate: 2.3Gbps
signal: 80
rssi: -58
tx-sector: 52
tx-sector-info: right 0.2 degrees, up 1 degrees
rx-sector: 96
distance: 1296.07m

> interface w60g monitor wlan60-1 once
connected: yes
frequency: 58320
remote-address: 04:D6:AA:XX:XX:XX
mcs: 8
phy-rate: 2.3Gbps
signal: 50
rssi: -69
tx-sector: 35
tx-sector-info: center
rx-sector: 96
distance: 1296.06m

What is strange: How could the RSSI on both sides differ that much. Misalignment on one side should affect both rssi values. LOS is free. No reflections. Is Beamsteering doing some magic here which works only in one direction?

Re: LHG 60G experience

Posted: Tue Jul 24, 2018 6:47 am
by mistry7
Did you measure with traffic on link?

Re: LHG 60G experience

Posted: Tue Jul 24, 2018 10:16 am
by ste
Did you measure with traffic on link?
Yes. No difference.

Re: LHG 60G experience

Posted: Tue Jul 24, 2018 11:51 am
by madmax
ROs v.6.42.6 , link up with low rain and wind 28 kts.

Notice no Tx-sector info in master device using winbox window, I must use monitor via terminal.
If I tryed to center the devices , RSSI value increses. I have a good RSSI without center the devices.