TX POWER

user28 · April 14, 2007, 3:00pm

hello all

i have an SR@ card i want to know two things pls

no1. what is the defualt power out dbm or mw

and

no2. how do you change the tx power in the mikrotik winbox

thank you

taloot · April 14, 2007, 9:49pm

hi
i just bought RF power meter

the defualt for the SR2 is 26dbm = 400mw

ALSO anyone want a help in TX power i m welling to do so

btw with senao i got arround 24dbm

mipland · April 14, 2007, 10:18pm

Hy, have you tested, with your RF Power meter, which is the REAL maximum power output for a SR or XR series (2,4 or 5GHz is not important)?

taloot · April 15, 2007, 3:43am

yes i do

the max is 28dbm for the SR2 but the signal isnt stable it keeps jumping from 26-27 to 28 so its not recomended

i dont have SR5 to test
XR2 i have its in DHL now i m going to bring it after 1 hour and i will let you know the result

SR2 @ 28dbm like nmp-8602 @ 26dbm (senao gaves up the maxuimum possable power that we could make when overclocking the card) so if the senao the one who make the SR2 the will say its 600mw
also i have sparklan mini-pci its rated @ 17dbm but its very stable @ 22 dbm

any question guys please Ask

taloot · April 15, 2007, 9:53am

i Test the XR-2

on defualt i got 28dbm

once i make card rate i and set the tx power to 28 dbm i got on my meter 30dbm + (my meter max is 30dbm)

unbelivable powerfull mini-pci = to amplifire 1 watt on signal range

any question?

mipland · April 15, 2007, 11:02am

Yes.
First, thanks for your answer and testing, then:
Which is the exactly brand and model of your power meter?
Where did you buy it?
What is it’s price?

Thanks

taloot · April 15, 2007, 10:39pm

http://www.bvsystems.com/Products/Spectrum/Butterfly/butterfly.htm

this is it

i buy it from them

also its gave me special price but ithink the regular price should be less than 650 USD

jorj · April 17, 2007, 8:21am

What about R52 ?
max/default/max-stable output power ?

taloot · April 17, 2007, 9:32am

not test the R52 it self but i test somthing very very like the r52 and i think its the same

i got 17dbm

when i overRF i got 21-22 dbm

n4dsl · April 19, 2007, 10:48am

How do the numbers in mikrotik link up with SR5 cards. By default it shows TX power of 17, default power is 26, so does that mean I need to subtract 9 to get real power level, if I want to manually set?

kvan64 · April 23, 2007, 10:01am

I am confused. So, if you set the card rates of SR2 to 26 then the actual power is way over 26 right?

Does anyone know what is the recommended card rate for SR2 and XR2 for optimal power without harming the card or crashing the MT system? Ta

mipland · April 23, 2007, 5:23pm

Does anyone know what is the recommended card rate for SR2 and XR2 for optimal power without harming the card or crashing the MT system?

I think this will be VERY useful for all user (as me) who doesn’t have a precision instrument as Taloot’s power meter.

Recently, we experienced a strange thing…replaced a SR5 with a compex 200mw, and we had about +5-6dBm improvement on client receiving. We have tryed this on another site, and we have obtained the same thing.
So, this are the question which we are asking us:

is SR2/SR5 a REAL 400mw card or is it a fake?
may be a RouterOS Driver/Management fault?
is compex 200mw a 1W card (i don’t think so )?

Thanks

taloot · April 23, 2007, 8:11pm

hi guys the XR2 giving me 28dbm on default tx power but from my tests guys the ubnt cards are not recomended @ all @ least on the 2.4ghz

i have SR2 and all of them are installed outdoor and its hard to me to got it
also the XR2 now its installed but i m going to recive a very good quility of 500mw cards i will test it and let you know guys

the XR2 is stable for 2 hours then it become unstable even in version 2.9.38

mipland · April 23, 2007, 9:18pm

Can you explain better what you wrote on this sentences? I don’t understand what you say, sorry.

Doh! I bought one XR2 on this morning to replace my old SR2 on an omni hotspot!
Just a thing: i have EVER used that SR2 on that omni, and never got a problem (client are all Linksys WRT54GL + dd-wrt and one Litestation 2). Then, on a bad (thunderstorm) day, i lost my SR2: i replaced it with a Senao NL2511 mPCI 200mW. I gave more power on client side (and this is very strange, becouse Senao is 200mW and SR2 is 400mW), but my client are unstable a lot. They are connected through PPPoE, and at least one time a day i have to manually kick off becouse they lost connectivity with my hotspot (they seems to be connected, but no data transfer at all). LS2 can’t connect to Senao, only sometimes after 5-10 minutes, than it lost it’s connection, so i’m happy with SR2. Which is your problem with it?

taloot · April 26, 2007, 3:13pm

hello,

could you please tell’s us whats your signal TX and RX and whats your noise floor

also what about the pinging time??

mipland · April 27, 2007, 2:25pm

Sure!

At the moment, i’m only able to provide what you want with an XR2 (i put it on two days ago, replacing the Senao) installed on a RB532 (there’s also a SR2 for backhaul).
Is this on your interest? If yes, i will answer on this evening.

taloot · April 27, 2007, 8:33pm

sure

mipland · April 27, 2007, 11:53pm

My setup is:
Hotspot side:

802.11b
1 x RB532R5, powered @ 12V
1 x SR2 for backhaul (channel 11)
1 x XR2 for hotspot (channel 6)
12dBi collinear antenna
5-6 client on it, 24/7

Client Side:

802.11b
PPPoE connection type
1km from the hotspot
1 x VAGI Pacwireless antenna 16dBi
1 x Linksys WRT54GL with dd-wrt on-board.

Signal displayed on Linksys: -68/-72
Signal displayed on Mikrotik: -67/-72
Ping from Linksys console to Mikrotik:

~ # ping 172.21.1.34
PING 172.21.1.34 (172.21.1.34): 56 data bytes
64 bytes from 172.21.1.34: icmp_seq=0 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=1 ttl=64 time=2.9 ms
64 bytes from 172.21.1.34: icmp_seq=2 ttl=64 time=3.2 ms
64 bytes from 172.21.1.34: icmp_seq=3 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=4 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=5 ttl=64 time=7.1 ms
64 bytes from 172.21.1.34: icmp_seq=6 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=7 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=8 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=9 ttl=64 time=2.9 ms
64 bytes from 172.21.1.34: icmp_seq=10 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=11 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=12 ttl=64 time=3.4 ms
64 bytes from 172.21.1.34: icmp_seq=13 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=14 ttl=64 time=4.0 ms
64 bytes from 172.21.1.34: icmp_seq=15 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=16 ttl=64 time=4.8 ms
64 bytes from 172.21.1.34: icmp_seq=17 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=18 ttl=64 time=2.8 ms
64 bytes from 172.21.1.34: icmp_seq=19 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=20 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=21 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=22 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=23 ttl=64 time=3.4 ms
64 bytes from 172.21.1.34: icmp_seq=24 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=25 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=26 ttl=64 time=6.8 ms
64 bytes from 172.21.1.34: icmp_seq=27 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=28 ttl=64 time=2.7 ms
64 bytes from 172.21.1.34: icmp_seq=29 ttl=64 time=2.7 ms

--- 172.21.1.34 ping statistics ---
30 packets transmitted, 30 packets received, 0% packet loss
round-trip min/avg/max = 2.7/3.1/7.1 ms
~ #

This ping was made after 3days and half of routerboard’s uptime, never disabled the XR2, never “touched” anything. We noticed some occasionally disconnection from wireless client, but they are very quickly to reconnect itself (< 5 seconds).
The only thing which goes wrong, it’s the nose report on routerboard: it is not as accurate as with SR2 installed.
With SR2 it is -99/-106, with XR2is -88/-94. We have tryed on the same condition, and the noise reported was the same.
I wrote that this is not accurate becouse, sometime, i see a client in NLOS with -92/-94 signal, noise -88, SNR -4/-6, but the CCQ is 96/100%
I wrote (yes, we have tryed to transfer something in that condition, and the real TCP bandwith never goes under 300kBytes/s.

taloot · April 28, 2007, 9:04am

never disabled the XR2, never “touched” anything. We noticed some occasionally disconnection from wireless client,

what do u mean by that

i tried our new 500mw mini-pci i noticed it has higher recive signal than XR-2
it was -71 now its -66

same postion same location same every thing

btw my friend have you tried the 900mhz ?

could you please add me in your msn if you have?

Taloot(at)hotmail(dot)com

mipland · May 2, 2007, 6:51am

Simply that i never modify anything on the routeros settings for 3days.

We noticed some disconnection on the wireless side, about 1 times a day.

Ok, but which is the brand and model of your 500mW cards?

No, never. Our country regulation doesn’t allow 900MHz use (used by commercial GSM phone).

Just added!