bad antenna On Fri, Oct 23, 2015 at 2:06 PM, Dennis Burgess <[email protected]> wrote:
> Atmospheric. > > > > Dennis Burgess, CTO, Link Technologies, Inc. > > [email protected] – 314-735-0270 x103 – www.linktechs.net > > > > *From:* Af [mailto:[email protected]] *On Behalf Of *Keefe John > *Sent:* Friday, October 23, 2015 12:31 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] 20+db swing > > > > signal can change from thermal ducting > > On 10/23/2015 11:40 AM, Dennis Burgess wrote: > > Signal don’t change unless you have rain, etc. The last two things are > wind (antenna alignment) and tx power. That’s it.. > > > > Dennis Burgess, CTO, Link Technologies, Inc. > > [email protected] – 314-735-0270 x103 – www.linktechs.net > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Scott Vander Dussen > *Sent:* Friday, October 23, 2015 11:31 AM > *To:* [email protected] > *Subject:* [AFMUG] 20+db swing > > > > 17 mile link, 11GHz, 3’ dishes- it’s worked fine for years and over the > past few months there has been an increasing fluctuation with signal > quality. SAF support suggested we were too high on one side and actually > lowering it would help, it didn’t change. We’ve verified LOS, even > switched out to a DragonWave 11ghz pair of radios and it exhibited the same > behavior as the SAF. We then moved one side of the link to a different > tower about 6 miles away (still makes overall link 17 miles) and we’re > getting the exact same behavior. In years’ past the signal was consistent, > now we’re seeing this: > > > > > > Am I missing something? Same behavior with two different radios, > frequencies, and towers. There are no environmental conditions like > moisture, etc. that are obvious culprits. > > > > > > >
