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Sextant link speed

Posted: Wed Apr 25, 2012 5:52 pm
by armandfumal
Hi,

I use 2 sextant with bridge and stations WDS

the best link speed in lab is 6Mbps/6Mbps

I have selected 20/40MHz HT above.

What's wrong ?

thanks

Re: Sextant link speed

Posted: Wed Apr 25, 2012 5:55 pm
by honzam
What configuration? 802.11A, 802.11N or 2x2 MIMO?
Whar protocol? 802.11, nstreme or NV2?
What version of routerOS?
What signals on both sides?

Re: Sextant link speed

Posted: Wed Apr 25, 2012 6:03 pm
by armandfumal
802.11N
NV2 802.11
5.15

Both sextant is in a lab 3meters, signal full
may be to close ?

Re: Sextant link speed

Posted: Wed Apr 25, 2012 6:18 pm
by 0ldman
Probably.

Connect with Winbox or web and check the signal level. You should be -50 to -75. You are probably -30 or stronger.

Re: Sextant link speed

Posted: Wed Apr 25, 2012 6:54 pm
by armandfumal
I found

in the winbox, interface wireless, HT MCS, they are only MC0 to MC15
in the webif they are MCS0 to MCS23, I click all to MCS23

and now it is better, go up 180MBps in the lab.

bug ou version of winbox ?

Re: Sextant link speed

Posted: Wed Apr 25, 2012 7:13 pm
by 0ldman
What is your signal level? Not the lights on the back, use the web interface or Winbox, wireless status, rx/tx signal level.

It isn't possible to answer your question without you answering ours.

Sextant can only use up to MCS15 as I understand it. MCS 16 and above are for 3x3 MIMO.

Re: Sextant link speed

Posted: Wed Apr 25, 2012 7:31 pm
by armandfumal
status: connected-to-ess
band: 5ghz-n
frequency: 5200MHz
wireless-protocol: nv2
tx-rate: 150.0Mbps
rx-rate: 180.0Mbps
ssid: WISP-Cybernet-1
bssid: 00:0C:42:6D:A0:FE
radio-name: 000C426DA0FE
signal-strength: -44dBm
signal-strength-ch0: -46dBm
signal-strength-ch1: -47dBm
tx-signal-strength: -42dBm
tx-signal-strength-ch0: -46dBm
tx-signal-strength-ch1: -44dBm
noise-floor: -120dBm
signal-to-noise: 76dB
tx-ccq: 84%
rx-ccq: 79%
authenticated-clients: 1
current-distance: 1
wds-link: yes
bridge: no
routeros-version: 5.15
last-ip: 192.168.88.1
current-tx-powers: 6Mbps:22(22/25),9Mbps:22(22/25),12Mbps:22(22/25),18Mbps:22(22/25),24Mbps:22(22/25),
36Mbps:22(22/25),48Mbps:20(20/23),54Mbps:19(19/22),HT20-0:22(22/25),HT20-1:21(21/24),
HT20-2:21(21/24),HT20-3:21(21/24),HT20-4:20(20/23),HT20-5:19(19/22),HT20-6:19(19/22),
HT20-7:16(16/19),HT40-0:21(21/24),HT40-1:21(21/24),HT40-2:21(21/24),HT40-3:21(21/24),
HT40-4:20(20/23),HT40-5:19(19/22),HT40-6:18(18/21),HT40-7:15(15/18)
notify-external-fdb: no

Re: Sextant link speed

Posted: Wed Apr 25, 2012 9:45 pm
by 0ldman
Try dropping your tx power. -45 should work, but may still be too much.

I'd drop both sides down to around 8 to 10dBm tx power and see how that does.


Before you take them out to install, you probably will want to set tx power to default again, then adjust as needed on site.

Re: Sextant link speed

Posted: Wed Apr 25, 2012 9:56 pm
by InoX
you must make some traffic between them and signal over -45

Re: Sextant link speed

Posted: Tue May 29, 2012 12:27 am
by armandfumal
Hi all,

So now in the real environment, all is ok.

thanks for help