100mW AP with 1W Amp. Problem

I’m experiencing problems during transmition wile the AP runs perfectly with signal strength constantly… but, sometimes the latency goes from 2-600ms back&forth (with timeouts)… I have 50 wireless clients conected on the AP (wirelessly)… can it be something on the Mikrotik version or the AP…!?

can someone hejp me with this one?

Are the latency issues experienced by all clients on the AP or just a select few?

Also what kind of card are you using Prism/Atheros?

If your card has an output power greater than 100mW try turning the tx-power down to 30/65mW.. This helps with amplified configurations because most amps have a limit to the amount of power they can accept from a source. By lowering the transmit power on the card it will improve the performance of the amp and prevent you from “overdriving” the amp.

Also check your physical layer devices.. make sure all connectors are on snug and weatherproofed properly. Water and other elements can cause poor performance if they infiltrate your LMR cable or connectors.

@ IronBalls

Atheros cards cant work with boosters!
As you increase signal strength you also increase noise level!!!
Latency you have is normal.
It has nothing to do with Mikrotik!
Again, 50 clients connected to one AP is pretty much :slight_smile:

Cheers…

well, I have a Cisco AIRonet for an AP (using max power mW) and an 1W amp. It dose not have any problems during the hole day, only in the evenings it has a lot of timeouts with alla the clients… but the signal strength is perfect the hole time (I tried change’n the channels did not help at all)… !!!.


anyone?!

I can confirm that using amps is a bad idea, and it will just worsen the situation. you can only use amps in perfect situation where signal is ideal and there is no noise.

somehow we all want that Ideal perfect place and performance for our AP’s…!

yes, but if you don’t have it, avoid amps

as I mentioned before, the signal is perfect all the time… wireless clients dont get disconnected at all. I’m monitoring them in the Cisco to Clinet signals, Its perfekt the hole time also during the latency…

I had the same problem and I’m tellin’ you that the strength is ok, but noise level is too strong for card to operate normally. Try puting prism2.5 and it will work with amps, but atheros no.
You seem to forget that noise level is most important.

Cheers…

Regarding amps, I have noticed a very big difference between good and bad amps. I beleive (by far) some of the best amps on the market are the RFLinx ones. Those guys make lots of stuff for the military. Also their amps will still pass a signal through them even if they get blown. But as for quality, I seem to see the best performance on these amps compared to Teletronics, YDI, etc.

Eric

The Taiwanese brand of amp we use here have no problems - just wind the Atheros power right back to under 10db even 5 db. Let the amp do
the work in both receive and transmit and cut the coax losses.
We receive APs from 40-50km away through the amp from our APs with favourable views on a scan/snoop.

@kenk

Please, do understand that point to point link is something different.
Dude has problem with AP!
Also you are in Australia and I guess you don’t have ~500 2.4Ghz antennas arround.
In area full of 2.4ghz the best AP is without booster, low power card and good antenna.

Cheers8…

Hi Djape,
Thats true I guess that our 2.4ghz density is much lower than what you
have in Europe. On the Access point in question, (not a point to point
link), it does see other Ap access points 50-60km away, but theres
probably only 40 or so maximum stations on that AP. My point was more
that as it was receiving that distance that the noise floor has not increased a lot with the amp, although that particular Atheros 5213 card it has, seems to be more sensitive than most.. In our cities we probably see 30-60 Access points from an AP with a busy location.
Cheers Kenk.