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zorrua
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Joined: Sun Sep 17, 2017 4:32 pm

Signal values

Sun Sep 17, 2017 4:38 pm

Hello,

I have a point-to-point wireless link in station / station bridge mode, this link is for 500 meters and I use a pair of SXT 5HPnD devices.

I want to know if I could perform the signal quality, I don't understand the values I got:

In bridge: Image

In station bridge : Image

Are this values correct? Which value is the important one?

I will really appreciate your help.

Kind regards.
 
tay
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Re: Signal values

Mon Sep 25, 2017 2:55 pm

hi zorrua, did you do test in laboratory? I have ptp link about 18kms , but i dont get link quality--please take a look. (netmetal 5 dual chain). can you help me?

thks
----

status: connected-to-ess
channel: 5500/20-eeeC/ac
wireless-protocol: nv2
tx-rate: 6Mbps
rx-rate: 130Mbps-80MHz/2S/SGI
ssid: ------
bssid: 64:D1:54:6F:XX:Xx
radio-name: netmetal5
signal-strength: -65dBm
signal-strength-ch0: -67dBm
signal-strength-ch1: -70dBm
tx-signal-strength: -64dBm
tx-signal-strength-ch0: -66dBm
tx-signal-strength-ch1: -68dBm
noise-floor: -102dBm
signal-to-noise: 37dB
tx-ccq: 6%
rx-ccq: 42%

authenticated-clients: 1
current-distance: 17 kms
wds-link: no
bridge: yes
routeros-version: 6.40.2
 
scampbell
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Re: Signal values

Tue Sep 26, 2017 2:07 am

You have 16dB difference between your chain 0 and chain 1 settings - I would resolve that first.

Check alignment and clear line of sight.

Image
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zorrua
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Re: Signal values

Tue Sep 26, 2017 11:29 pm

You have 16dB difference between your chain 0 and chain 1 settings - I would resolve that first.

Check alignment and clear line of sight.

Image
Thanks for the reply,

Is there any guide to make the aligment? I did it by hand.

Kind regards.
 
scampbell
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Re: Signal values

Wed Sep 27, 2017 12:04 am

Easiest way is by having someone monitor the registration for you while you adjust - this can be done from either radio - just watch the CH0 and CH1 registration and adjust for best signal. You will need to do both ends of the link to get the best result.

You could do it your self if you can juggle a tablet/laptop, ladder and sxt but not recommended for safety :-)

The goal is to get both Chains similar (not always exactly the same but they should be pretty close, say 0-3dB difference) and the signal as strong as possible (i.e -40dB is better than -50dB).

Using the LED on the station end works to a point but does not show the deifference between Chains.

Hope this helps.
MTCNA, MTCWE, MTCRE, MTCTCE, MTCSE, MTCINE, Trainer
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