All of the comunications and rf cable that I have used, I have been told to only ground it at one end. But, I have heard a lot of things in the past ;-)
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jerry Carter Sent: Friday, July 18, 2003 1:29 AM To: [EMAIL PROTECTED] Subject: Re: Re[4]: [smartBridges] New Firmware Hey John, One question, Do you ground the shielded ethernet at the top by the radio or on the ground? I just installed a setup with it and grounded it at the bottom (ground). Did I make a mistake? Jerry ----- Original Message ----- From: "John Hokenson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, July 18, 2003 1:22 AM Subject: Re: Re[4]: [smartBridges] New Firmware > A couple of suggestions to make things happier up on top of the tower.... > 1. Use the Polyphaser that has a male on the equipment side and > female on the antenna side and screw it directly on the SB AP. > 2. Bond a good ground connection from the Polyphaser to the tower > leg--#10 or larger wire--you can order a flat plate from Polyphaser > that attaches under the provided locknut to give you two screw holes > to attach a > double hole crimp lug to it. > 3. Run DB style shielded Cat5 up the tower and bond the shield to > the tower at the top, 150' down (middle) and at the bottom where it > leaves the tower. > 4. If you are using the maxrad 120* sectors, save yourself some > grief and a. Throw away the lousy tilt mounts they provide...they are > aluminum and to not stay in place....we picked up some stainless > conduit hangers and stainless 1/4-20 hex bolts and attached them > directly to the tower leg, using some spacers on the top hanger to get > exactly the correct amount of downtilt we wanted. > 5. Also, make sure you order them with a male N connector so it > will attach directly to the female on the Polyphaser. > 6. Lastly, seriously consider putting the antenna, Polyphaser and > radio together on the ground--and using 3:1 DB shrink (the kind with > hot glue on the inside) to seal the antenna-to-polyphaser and > polyphaser-to-radio connections--you'll be glad you did. > Alernatively, I would rather use Scotch self-fusing rubber tape and > Scotchkote than rubber tape. When I use this technique I put 4-5 > layers of rubber tape that fuses > into a single piece, then three coats of Scotchkote---been doing this > over 30 years now and never had it leak. > > JH > > PS...you might want to search the archives for my treatese on proper install > techniques. > > PPS...YDI has a nice calculator for setting the downtilt. > ----- Original Message ----- > From: "Tom Haynes" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, July 17, 2003 10:39 PM > Subject: RE: Re[4]: [smartBridges] New Firmware > > > > You will need 6 coaxial jumpers (one on each side of the polyphaser) > unless > > you use the Nfemale-Nmale protector. Add in 6 rolls of 3m 33 > > Electrical > tape > > ($2.50ea) as well as a can of 3m liquid electrical tape ($10-20). > > Don't skimp on the weatherproofing! You will need an enclosure at > > the base of > the > > tower (unless there is a building) to put the power supplies, > > router, powerShot, etc... . > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > > On Behalf Of [EMAIL PROTECTED] > > Sent: Friday, July 18, 2003 12:33 AM > > To: Bill Flood > > Subject: Re[4]: [smartBridges] New Firmware > > > > > > On Fri, 18 Jul 2003, Lancaster Networks wrote: > > > I need to provide them with a COMPLETE proposal of this whole > > > thing, and right now, this is what I am going to propose to them: > > > > > > (3) SmartBridges AirPoint Pro Outdoor @ $330.00 ea = $990.00 > > > (3) Maxrad 120 degree beamwidth antenna @ $407.52 ea = $1222.56 > > > (3) LMR-400 4ft jumper coax cable @ $24.00 ea = $72.00 > > > (3) Polyphaser 2.4ghz coaxial lightning protectors @ $35.66 ea = > > > $106.98 > > > > Looks good. > > > > > Has anyone needed to use polyphasers? We use them as a standard > > > where you have 100-300 foot hardline runs, but in this case, it's > > > ethernet cable. But I don't feel like climbing up the 300 foot > > > tower to replace a blown radio either. > > > > Polyphasers rock. But you know this already. Put a Coax protector on > > the N > > connector at the radio, and run your antennas pigtail off of that. > > Be sure > > to ground the polyphaser well. The SmartBridges use a plastic case, > > so you > > can't ground em. Once the ethernet comes inside, put a Polyphaser > > IS-T1 protector on the ethernet. They make a three port model, would > > be perfect > > for you. Bear in mind you will need to protect the PoE seperately. > > The > IS-T1 > > only protects two pairs. (Or 2 pairs X 3 ports on the IS-3T1) > > > > > This brings me to another point, are SB's products reliable enough > > > that I won't need to spend my entire life climbing the tower to > > > fix them or reflash them? them? > > > > There are no serial ports on the units, and you can reset the > configuration > > from the power injector, so I don't see why you would need to climb, > except > > to replace the entire radio. My APs are all Cisco or Trango, never > > used SmartBridges anywhere other than a CPE. Not sure if I would > > trust them. > > > > > I plan on mounting the antenna's with a bit of a downtilt, but all > > > at the top of the 300' tower, because I am looking for long-range > > > performance. Any methods for calculating downtilt that work good? > > > I've used my knowledge in the broadcast/radio industry to make my > > > own calculations, and with the use of ComStudy (an excellent > > > program for calculating RF propagation) > > > > YDI (www.ydi.com) has a number of javascript forms that will do all > > the common calculations for you. Check em out. > > > > Jeremy > > (Fromer Lancasterite) > > > > 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 > > > > 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 > > 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 > 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 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
