You can pick up an older Tektroniks 492p off ebay for around $1000. A couple hundred for a new calibration and you've got a spectrum analyzer that works from 50kHz to 21 GHz...and they are military rated meaning they are tough as nails. Just make sure you've got a good winch to get it up the tower...they weigh about 50 lbs. I love mine.
Cameron Mike wrote: > I'll second that. > > I have used the various 2.4 G versions for a few years. They now > have an sma connector for external antenna. The only drawback is > they have to be plugged into a USB port. Witht the right directional > antenna it may be possible to find the direction the offending signal > arrives from. You might be better with a little lossy antenna > though. If you have that strong a signal in the nearfield, the > signal will appear to be coming from everything metal. I still > suspect something at the site, based only on the signal level you > reported. When you do your audit, turn everything off -- read, turn > one thing on -- read, turn another thing on --read. > > Mike > > At 04:52 PM 10/12/2009, you wrote: > >> http://store.wisp-router.com/itemdesc.asp?ic=Wi%2DSpyDBx&eq=&Tp= >> >> MetaGeek's Wi-SpyDBx can do what you need to. Covers both 2.4 and >> 5GHz (actually can even do 4.9GHz) >> >> Nifty tool with great software. Got a client server solution both >> for windows and Linux. >> >> /Eje >> Sent via BlackBerry from T-Mobile >> >> -----Original Message----- >> From: Randy Cosby <dco...@infowest.com> >> Date: Mon, 12 Oct 2009 14:05:17 >> To: WISPA General List<wireless@wispa.org> >> Subject: Re: [WISPA] spectrum analysis - 5dBm interference at 5785 >> >> Well, we replaced the backhaul (osbridge) and get the same readings on >> the new one. The old one does not get the same readings when moved to >> another location, so it's picking up SOMETHING. Powered down everything >> else, same problem. So, someone is slamming me with a ton of signal >> near 5875... Now to find out where it's coming from. >> >> Any recommendations for a 5 gig spectrum analyzer? Ubiquiti airview >> looks interesting, but only for 2.4 and 900. Guess I can use the >> built-in one in the osbridge, but it's not too fast / granular. >> >> Randy >> >> >> Randy Cosby wrote: >> >>> Did that - don't have the results here with me, but there was quite a >>> poor noise floor around the middle of the band - just like the osbridge >>> reported. Not nearly as severe though. >>> >>> Randy >>> >>> >>> Scott Carullo wrote: >>> >>> >>>> Just do a survey on the AP, really thats all that matters... its easy >>>> takes a few minutes and you have the data you need to make educated >>>> decision. >>>> >>>> Scott Carullo >>>> Brevard Wireless >>>> 321-205-1100 x102 >>>> -------- Original Message -------- >>>> >>>> >>>> >>>>> From: "Randy Cosby" <dco...@infowest.com> >>>>> Sent: Monday, October 12, 2009 11:45 AM >>>>> To: "WISPA General List" <wireless@wispa.org> >>>>> Subject: Re: [WISPA] spectrum analysis - 5dBm interference at 5785 >>>>> >>>>> Quite likely you're right. >>>>> >>>>> I tried shutting off the trango AP's with no luck - same bad spectrum >>>>> analysis. I'm next going to go on site and do linktests on the AP's >>>>> with the backhaul off. >>>>> >>>>> My suspicion is the backhaul is bad - at least the spectrum analysis, >>>>> but it is potentially the source of interference as well. >>>>> >>>>> Randy >>>>> >>>>> >>>>> Lakeland wrote: >>>>> >>>>> >>>>> >>>>>> Randy, >>>>>> >>>>>> You cant go by that spectrum analyzer. Something is wrong. Most >>>>>> >>>>>> >>>>>> >>>> receivers >>>> >>>> >>>> >>>>>> can't handle 5dbm pumped into them without killing them. >>>>>> >>>>>> -B- >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> Randy Cosby writes: >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>>> Over the weekend we started getting complaints about a bad linktests >>>>>>> >>>>>>> >>>>>>> >>>> for >>>> >>>> >>>> >>>>>>> all customers on an old trango AP site. I've tried finding a cleaner >>>>>>> >>>>>>> >>>>>>> >>>> >>>>>>> channel, but am not having much luck getting good linktests up there. >>>>>>> >>>>>>> >>>>>>> >>>> >>>>>>> This is one of the first sites I built, and use a couple OSBridge 5Gxi >>>>>>> >>>>>>> >>>>>>> >>>> >>>>>>> radios to backhaul. I found they added a spectrum analyzer to a >>>>>>> >>>>>>> >>>>>>> >>>> newer >>>> >>>> >>>> >>>>>>> firmware version, so I installed it and ran a analysis of the site. >>>>>>> >>>>>>> >>>>>>> >>>> It >>>> >>>> >>>> >>>>>>> shows a 5dBm signal at 5785! Not -5, but 5. See attached. It >>>>>>> >>>>>>> >>>>>>> >>>> appears >>>> >>>> >>>> >>>>>>> that something VERY hot is either pointed at my AP site, or something >>>>>>> >>>>>>> >>>>>>> >>>> up >>>> >>>> >>>> >>>>>>> there has started interfering. >>>>>>> >>>>>>> Spectrum analysis from the near side of the link was relatively clean. >>>>>>> >>>>>>> >>>>>>> >>>> >>>>>>> Any suggestions on where to start my search? >>>>>>> >>>>>>> Randy >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> Bob Moldashel >>>>>> Lakeland Communications, Inc. >>>>>> 1350 Lincoln Avenue >>>>>> Holbrook, NY 11741 >>>>>> 800-479-9195 >>>>>> 631-286-8873 Fax >>>>>> 516-551-1131 Cell >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >> ---------------------------------------------------------------------------- >> >>>> ---- >>>> >>>> >>>> >>>>>> WISPA Wants You! Join today! >>>>>> http://signup.wispa.org/ >>>>>> >>>>>> >>>>>> >>>>>> >> ---------------------------------------------------------------------------- >> >>>> ---- >>>> >>>> >>>> >>>>>> WISPA Wireless List: wireless@wispa.org >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >> ---------------------------------------------------------------------------- >> >>>> ---- >>>> >>>> >>>> >>>>> WISPA Wants You! 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