Yes. I'll give you an example of a client we installed.
The client was only 7 miles away. We fought with their
connection for quite some time. We had good numbers, 90%
RSSI and 85-90% Link Quality. But couldn't figure out why
their speed was so slow.
I decided to change antennas, and the only one I had in
my truck that day was a 19db Pac Wireless grid. So I switched
their 24db grid for that. Boom, their RSSI jumped up to 95%
and LQ went to 95%. I had the power on the radio up all the
way, but the speed was still not what it should have been.
Then just for fun I cut it down to 1/4 of the full power
and suddenly their speed test showed 2.2 Megabit.
In the end we found that the line-of-sight was very clear
and the customer was very near the center of the antenna's
vertical beam. So we were basically SCREAMING at the tower
with to much power and it was coming across as mostly noise.
Once we turned it down it became a more normal conversation
for the radios to handle, and they were happy.
"More power is not always better."
- Marlon
Use AMPs only at the AP, and even then, use only enough
power to put the numbers right at 36db out. (for FCC territory)
That will help prevent you from polluting the airwaves with
a lot of excess signal and noise.
Kevin Summers
KISTech Internet Services Inc.
www.kistech.com
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Sam
> Sent: Sunday, September 28, 2003 8:31 AM
> To: [EMAIL PROTECTED]
> Subject: RE: [smartBridges] More on the 'slowdown' subject
>
>
> Kevin
>
> Other than facing being fined, is there anything wrong with running "too
> hot"?
>
> Sam
>
> On Sun, 28 Sep 2003, Kevin Summers wrote:
>
> > You're running WAY to hot.
> >
> > 500mW AMP + 27db
> > Cable and Connectors - 2db
> > 16db Antenna + 16db
> > --------------------------------
> > Total EIRP + 41db
> >
> > Use a 250mW AMP, or put a bandpass filter between the
> > AMP and the antenna. That will take away about 3db.
> > You need to get it down to 36.
> >
> > Kevin Summers
> > KISTech Internet Services Inc.
> > www.kistech.com
> >
> >
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED] Behalf Of Bobby Bounds
> > Sent: Saturday, September 27, 2003 3:34 PM
> > To: [EMAIL PROTECTED]
> > Subject: [smartBridges] More on the 'slowdown' subject
> >
> >
> > Recent posts (as well as not so recent) make reference to
> poor throughput
> > (about 1/3 what it should be) through a 'repeater' site (two
> radios, one in
> > Client Bridge mode, the other in A/P mode).
> >
> > We have the same problem. Suspecting the cheapo switch and this whole
> > half/full duplex issue, today I went up on the tower and
> replaced the switch
> > with a crossover cable. This made no difference to the download
> speed. So,
> > the switch was not the problem in our case.
> >
> > I'm back to the theory that the problem lies in the wireless
> link between
> > the head end radio and the client bridge radio. Some facts:
> >
> > RSSI 75%
> > LQ 85%
> > 3 miles
> > rolling hills, fresnel zone not good
> > vertical polarization
> >
> > Head End:
> > Antenna only 5 feet above the roof
> > More than one A/P and antenna on the head end mast, one
> only two feet
> > above the other (they are 180 deg. sectors facing opposite directions)
> > Repeater site:
> > Client Bridge config:
> > Radio is an APPI, latest firmware
> > Antenna is a 13 db panel
> >
> > A/P config:
> > Radio is an APPO, firmware
> > 500MW Amp on the AP
> > 16db, 90 deg. sector
> >
> > Any ideas????
> >
> > Guess I'll raise the antenna at the end up about 20 feet on a tower.
> > Maybe I'll try horizontal polarization for the first time.
> >
> > Bobby
> >
> >
> >
> >
> >
>
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