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 Subject :Signal to noise ratio.. 2014-10-12- 02:41:17 
9h1bw
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Joined: 2014-10-12- 07:26:44
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Will a high noise level effect a stable connectivity and through put ? We are testing a small network in a high wifi user enviorment where we encounter the loss of stable contact and yoyo-ing of the % readability even over short distances. Does anybody have a solution to this situation? 

We have found that by shifting from say channel 1 to channel 3 an increase of 2 bd was noticed in the signal to noise ratio..

can this be overcome by increasing the power, or does one make things worse? We are using the linksys wrt54gs.
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 Subject :Re:Signal to noise ratio.. 2014-10-13- 06:17:36 
AE6XE
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My experience is, yes. I found that a ch1 filter made a big difference--more so than adding an amp. However, before buying such devices, the ubiquiti hardware is same or lower cost and accomplishes the same thing. The linksys hardware is many years old and the receiver sensitivity and ability to deal in a congested environment, let's just say, have room for improvement. There are also the usual techniques: 1) directional antennas vs. omni receiving signals from everywhere 2) act as neighborhood freq coordinator and delicately ask neighbors to move up to ch 6 or above. (many iphone/android apps to track signals down.) Just in case, ch1 and ch3 have overlap of bandwidth. ch3 has overlap from ch1 up to ch7--bigger potential for competing signals/noise in the middle, where as ch1 has overlap from ch1 to ch5. Manufactor's default on ch1, 6, and 11 for clear separation.
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 Subject :Re:Signal to noise ratio.. 2014-10-13- 19:52:38 
9h1bw
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Thank you for your reply. I am now in a much better position to understand what is going on. I have copied your reply to my fellow ham and will discuss what to do to resolve our difficulties . In fact we have been looking at the ubiquiti routers especially because we need to create a bridge of some 10 km. thus we are considering getting the air grid model.

what type of filter have you used to filter channel 1?
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 Subject :Re:Signal to noise ratio.. 2014-10-14- 01:01:10 
AE6XE
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Joined: 2013-11-05- 00:09:51
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I had purchased this filter prior to the release of bbhn for ubiquiti.

http://www.l-com.com/bandpass-filter-rf-splitter-24-ghz-ultra-high-q-8-pole-outdoor-bandpass-filter-channel-1-2412-mhz

Joe AE6XE
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Last Edited On: 2014-10-14- 01:02:38 By AE6XE for the Reason
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