William, I've answered your questions inline.
jack berkeleymassage wrote: > Hello, > > I need to run a coax cable about 20'-30' from > my WET11 indoors to an external antenna outside. > I read Jacks reply to Jeff on nycwireless that > "Times Microwave LMR-400 and two connectors." is the > cable to use for the least degradation for that > length of run. Also, I need some antenna suggestions > to receive nodes in my area from 5-10 miles away. > > My questions: > > 1- Is "Times Microwave LMR-400" one of the better > coax cables for a 30' run? Where do you get it and > the connectors to the WET11 and antenna? LMR-400 is the best. Get it from Electro-Comm or Hyperlink. If you only need 1 length, ask to buy it with the connectors already attached. www.ecommwireless.com www.hyperlinktech.com > > > 2- What is a excellent bullet proof ext. antenna > to connect to my WET11 to receive nodes 5-10 miles > away or further? I prefer reasonably priced, but would > consider spending the money for a antenna that would > pick up ANYTHING in the area. What dbi do I need? Is > there a maximum dbi that I can hook up? Omni-direct > vs. directional antenna? Picking up a distant node is a bit more complex than buying a "bullet proof" antenna. It requires having a good signal-to-noise ratio (SNR) at both ends of the link. A good SNR results from: 1. Having a clear line-of-sight path LOS (no obstructions) 2. Having an ample amount of receive signal (at both ends) 3. Having a reasonably low amount of noise (at both ends) 4. Aiming your antenna accurately at the distant node 5. Waterproofing and windproofing your antenna system properly To connect your WET11 you'll need: a. A "pigtail" jumper to connect the WET11 antenna connector to the LMR-400 b. The shortest length of coax as possible (to minimize loss) c. An antenna with enough gain to insure that you have a good SNR at both ends (depends not only on the LOS path but on the transmit power and receive sensitivity at each end). At 5-10 miles, you would typically need a 15-18 dBi antenna. "Panel" antennas are used most frequently. These typically cost between $50 and $125 dollars. Keep in mind that your range will also depend on the antenna system that is in use at the "other" end. The maximum practical antenna gain is about 24 dBi (because the size gets larger as the gain goes up. Always use a directional antennna when you are connecting to only one distant point. This is low power operation and you don't have any signal to waste it by radiating it in all directions, as an omni would. You're welcome. > > Thanks very much in advance, > > William -- Jack Unger, President-Wireless InfoNet ([EMAIL PROTECTED]) 818 227-4220 Vendor-Neutral WISP Training - http://www.ask-wi.com/2002workshops Author - "Deploying License-Free Wireless WANs" http://www.amazon.com/exec/obidos/ASIN/1587050692/ -- NYCwireless - http://www.nycwireless.net/ Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ Archives: http://lists.nycwireless.net/pipermail/nycwireless/
