RE: [smartBridges] More on the 'slowdown' subject

[Kevin Summers]

That's still a little hot. You might throw the bandpass filter in there anyway. Even with the 250mW AMP you are putting out about 38db, and your power doubles for every 3db you gain. So 2db doesn't sound like much, but 36db is 4 Watts, where 38db is 6.3 Watts. Kevin Summers KISTech Internet Services Inc. www.kistech.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of Bobby Bounds Sent: Sunday, September 28, 2003 8:54 AM To: [EMAIL PROTECTED] Subject: Re: [smartBridges] More on the 'slowdown' subject Correction: The amp IS 250 MW (not 500 MW).   Also, it seems WISP operators like us and SB are still pretty clueless about solving performance problems. Everyone suggests all the usual stuff but no one seems to have an adequate answer.     ----- Original Message ----- From: Kevin Summers To: [EMAIL PROTECTED] Sent: Sunday, September 28, 2003 9:07 AM Subject: RE: [smartBridges] More on the 'slowdown' subject 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]On 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