Just don't start complaining about the squirrels with two tails... :-) There are several things to consider when using AMPs.
1. AGC is the best way to go. That way you know exactly how much power is available at the output of the AMP. The TT AMPs are nice because you can put anything from 1db, to 100db into it and you will always get the rated power out of the AMP. 2. Never use an AMP with an Omni. It just sprays signal everywhere and you get multipath out the ... 3. Always put the AMP at the top. A short pigtail to the antenna. That's it. If you put the AMP at the bottom you are just amplifying the noise on the coax along with your signal and it wont help you any. 4. Less is more. A 1 watt AMP is useful if you are setting up a 50 mile point to point link. Otherwise just put a 19db grid on it and tie a bag of microwave popcorn on a stick and hold it in front of the antenna for an hour for a tasty treat. :-) A 250mW AMP with a 14db sector has proven to be about the best combination for us in this heavily congested RF environment. With an AGC AMP we're putting 24db out, then 2db loss for the pigtail to the antenna, then a 14.5 db 90 degree sector. With that combination we've been able to link up with a customer at just over 16.5 miles. 5. Resist the urge to put an amp on a customer end. It just makes a mess of the RF in the area. 6. Even though you are running an uncertified system, be very aware that you need to stay as close as possible to the legal limit, if not just a hair under it. All it takes is a phone call from a HAM that has the equipment to measure how much power you are putting out of your sector antenna and you'll have to fix it or be shut down. Yes, we aren't running certified, but we aren't running over powered either. (we tried it and it didn't work well anyway) It's best to do everything you can to keep the noise floor down. AMPs are great, when used with a little planning. Kevin Summers KISTech Internet Services Inc. www.kistech.com > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Rudolph Worrell > Sent: Friday, October 17, 2003 3:56 AM > To: [EMAIL PROTECTED] > Subject: RE: [smartBridges] Amps! > > > It is not compliant but certified that is why this is in a test > environment. > > It turns out that unless there is a large cable run or low radio power the > amp is going to put you over the FCC limit. I basically wanted to see how > an amp would help me increase my range. And as far as I have > seen so far it > does not help me increase my range and still be abiding by the law. > > Perhaps a point to point link from the forest is where this 1 > Watt amp would > help. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Gino Villarini > Sent: Thursday, October 16, 2003 11:17 PM > To: [EMAIL PROTECTED] > Subject: RE: [smartBridges] Amps! > > > yes... > > but, I see FCC with 2 eyes... one is certified equipment and the other is > complaint equipment... > > the appo + amp + 12 bd omni is neither > Gino > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Bill Flood > Sent: Friday, October 17, 2003 12:20 AM > To: [EMAIL PROTECTED] > Subject: RE: [smartBridges] Amps! > > > Gino, > > Isn't any amp in violation of the FCC code Part 15?? Unless of course it > has been certified with the FCC as a combined unit. > > Bill > > > At 11:08 PM 10/16/2003 -0400, you wrote: > >you know your over legal limits with that amp - antenna combo right? > > > >Gino > > > >-----Original Message----- > >From: [EMAIL PROTECTED] > >[mailto:[EMAIL PROTECTED] Behalf Of Stuart Pierce > >Sent: Thursday, October 16, 2003 10:24 PM > >To: [EMAIL PROTECTED] > >Subject: RE: [smartBridges] Amps! > > > > > >a 12db omni, wow. > > > >---------- Original Message ---------------------------------- > >From: "Pascal Losier" <[EMAIL PROTECTED]> > >Reply-To: [EMAIL PROTECTED] > >Date: Thu, 16 Oct 2003 23:08:15 -0300 > > > > >You are listenning a 35 miles radius all around....... Hope your in the > > >wood. > > >-----Original Message----- > > >From: [EMAIL PROTECTED] > > >[mailto:[EMAIL PROTECTED] On Behalf Of Rudolph Worrell > > >Sent: Thursday, October 16, 2003 10:52 PM > > >To: [EMAIL PROTECTED] > > >Subject: [smartBridges] Amps! > > > > > > > > >I have a question for anyone who is using or used an am > before. Do they > > >work well with your SB equipment? > > > > > >I have a 1 watt amp on an a 12 dBi Omni connected to an APPO. I wanted > > >to see if it would boost my signal substantially. Well it did > for a few > > >hours and now all my LQ's are jumping from 0% - 90%. Any clue? > > > > > >I spoke to the manufacturer and he told me that I must set the SB AP to > > >10dBm and that is all I can do or else I could fry the amp. Well SB AP > > >only goes down to 11.5dBm. > > > > > >I think I am getting a lot of noise from that AMP on the receiving side > > >because the the signal strength is great but the LQ sucks. > > > > > > > > > > > > > >--- > >[This E-mail scanned for viruses by Declude Virus By Avolve.net] > > > >----------ANNOUNCEMENT---------- > >Don't forget to register for WISPCON IV > >http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm > > > >The PART-15.ORG smartBridges Discussion List > >To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > >smartBridges <yournickname> > >To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > >smartBridges) > >Archives: http://archives.part-15.org > > > >----------ANNOUNCEMENT---------- > >Don't forget to register for WISPCON IV > >http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm > > > >The PART-15.ORG smartBridges Discussion List > >To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > >smartBridges <yournickname> > >To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > >smartBridges) > >Archives: http://archives.part-15.org > > Bill Flood > AirRunner Networks LLC --- We make the web fast! > If you get tired of the wait call 715-443-3700! > www.airrun.net > > ----------ANNOUNCEMENT---------- > Don't forget to register for WISPCON IV > http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm > > The PART-15.ORG smartBridges Discussion List > To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > smartBridges <yournickname> > To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > smartBridges) > Archives: http://archives.part-15.org > > ----------ANNOUNCEMENT---------- > Don't forget to register for WISPCON IV > http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm > > The PART-15.ORG smartBridges Discussion List > To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > smartBridges <yournickname> > To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > smartBridges) > Archives: http://archives.part-15.org > > ----------ANNOUNCEMENT---------- > Don't forget to register for WISPCON IV > http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm > > The PART-15.ORG smartBridges Discussion List > To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > smartBridges <yournickname> > To Remove: mailto:[EMAIL PROTECTED] (in the body type > unsubscribe smartBridges) > Archives: http://archives.part-15.org ----------ANNOUNCEMENT---------- Don't forget to register for WISPCON IV http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org
