Depends on the cable. For most of it, I just run the drain wire to the ground block. For the BDDN cable, I found some ground clamps that are like alligator clips with screws. You put one jaw inside the shield, one between the shield and the jacket and the teeth pierce the shield. If I can find the supplier/part number I will post it.
Eric Muehleisen wrote: > Scott, > So do you solder or ground the shielded end at any point or just ground > the drain wire only? > > -Eric > > Scott Reed wrote: > >> From way back when I was an electrical engineering student, ground one >> end. Or ground every 10 to 20 feet along the run. Otherwise you have >> the potential for a ground loop, which means you have current running >> through the shield and then through the tower. That can induce it's own >> noise into the cable. >> >> Here is the key: Single Point Ground. >> The idea is to do your best to keep everything at the same voltage >> potential. So everything comes back to one place. >> >> So, while Jayson is right to a point about creating an antenna, the >> solution is different than he suggests. You want to have the drain wire >> do what it's name says, drain the stray signals to ground. For some >> installations, using the metal connector on one end works. That is, >> assuming that the board ground in directly connected to the single point >> ground. My personal preference is to directly connect the drain wire to >> the ground point, but the key is that you have one ground point and no >> current flowing through the ground wires. >> >> Jayson Baker wrote: >> >> >>> If you don't ground both ends you're creating a huge "antenna" to pick up >>> static and drain it right into your board/POE. >>> Always use shielded connectors on both ends, and ground both ends. >>> >>> On Tue, Aug 4, 2009 at 7:26 AM, Scott Carullo >>> <[email protected]>wrote: >>> >>> >>> >>> >>>> While we are on the STP topic... It's been noted several times that you >>>> are only supposed to ground ONE end of the STP shield otherwise you are >>>> creating for yourself a ground potential difference. The idea behind the >>>> shield is just that - shield noise away shunted to ground. On a typical >>>> install lets cal this the radio side use plastic connector and inside use >>>> grounded one with tall the other lightning goodies. What is the consensus >>>> on this while we are on topic :) >>>> >>>> Scott Carullo >>>> Brevard Wireless >>>> 321-205-1100 x102 >>>> >>>> -------- Original Message -------- >>>> >>>> > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.392 / Virus Database: 270.13.43/2281 - Release Date: 08/04/09 > 05:57:00 > > -- Scott Reed Sr. Systems Engineer GAB Midwest 1-800-363-1544 x4000 Cell: 260-273-7239 -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
