I've had the quarter waves that take multiple strikes go partially out 
in the past. Gas tubes have just blown.

Dave

RickG wrote:
> On that note. Can lightning protectors go partially bad or are they like a
> fuse and either work or not?
> -RickG
>
> On Thu, Jun 18, 2009 at 12:50 AM, Marlon K. Schafer 
> <o...@odessaoffice.com>wrote:
>
>   
>> Even so, the performance should be the same both ways, not tx vs. rx.
>>
>> I still think he needs to look at the lightning arrestors.  Not sure how
>> they could make a difference but that's the one thing that's unknown to me.
>> marlon
>>
>>  ----- Original Message -----
>>  From: Travis Johnson
>>  To: WISPA General List
>>  Sent: Monday, June 15, 2009 12:05 PM
>>  Subject: Re: [WISPA] Radio Seperation
>>
>>
>>  Hi,
>>
>>  I have to agree with Gino here... even at 7 degree downtilt, you are
>> cutting it very close. You may want to try 5 degrees on just one sector and
>> see if that helps.
>>
>>  Travis
>>
>>
>>  Michael Baird wrote:
>> Gino, wisp-router.com, would the downtilt affect the AP RSSI level?
>>
>> Antenna Height
>>        ft
>> Downtilt Angle
>>        °
>> Vertical Beamwidth
>>        °
>> Results
>> Inner -3dB Radius       0.1     Miles
>> Sweet spot      0.2     Miles
>> Outer -3dB Radius       5.24    Miles
>>
>>
>> I told him 7.8, but I'm sure he didn't get dead on, just the best he
>> could with his inclinometer.
>>
>> Regards
>> Michael Baird
>>  Where are you running the calcs? I use
>> http://www.wirelessconnections.net/calcs/AntDowntiltCalc.as
>>
>> With your input, I get main lobe 0.2 miles / -3db @ 7
>>
>> Gino A. Villarini
>> g...@aeronetpr.com
>> Aeronet Wireless Broadband Corp.
>> tel  787.273.4143   fax   787.273.4145
>>
>> -----Original Message-----
>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
>> Behalf Of Michael Baird
>> Sent: Monday, June 15, 2009 1:51 PM
>> To: WISPA General List
>> Subject: Re: [WISPA] Radio Seperation
>>
>> Gino,
>>
>> 145', 15 degree VB, 7.7/7.8 puts my -3d at ~5 miles. If my downtilt was
>> wrong, I would think it would impact the receive on my CPE's, much more
>> then on the tower AP's, maybe that's a poor assumption on my part
>> though.
>>
>> Regards
>> Michael Baird
>>
>>    I think your downtilt is too much, whats your area and tower height?
>> The beamwidth of the maxrad sector?
>>
>>
>> Gino A. Villarini
>> g...@aeronetpr.com
>> Aeronet Wireless Broadband Corp.
>> tel  787.273.4143   fax   787.273.4145
>>
>> -----Original Message-----
>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
>> On Behalf Of Michael Baird
>> Sent: Monday, June 15, 2009 1:29 PM
>> To: WISPA General List
>> Subject: Re: [WISPA] Radio Seperation
>>
>> My sector's are Maxrad adjustable sector's horizontally polarized,
>> adjusted to 120/13db, at 7.7 - 7.8 downtilt, trying to cover a 5 mile
>> radius.
>> Radios, are Ubiquity 400mw radio's, I've turned down to 23/200mw.
>> CPE's, are Ubiquity PS2, same radio at 400mw, Horizontal antenna at 18
>>
>>
>>    dbi.
>>
>> RSSI at the CPE is great, RSSI at the AP is poor often different by
>> 16-20 db.
>>
>> I also mentioned the RFLinx Qwave lightning arrestors, this is the
>> first tower we've used them on.
>>
>> Regards
>> Michael Baird
>>
>>
>>
>>      I don't think that this would be an antenna location issue.
>>
>> What antennas did you use and where are they pointed?
>>
>> Also, what output are the radios?  If you use 600mw radios on the ap
>> side and 100 mw radios on the rx side it'll make a difference.
>>
>> Also, having LOW power at the tx is almost always a good idea,
>> especially when colocated like this.  I usually only run 15 to 17dB
>> at
>>
>>
>>
>>
>>      the ap's.  Most of my sectors are 13dB.  Yeah, I have customers at 18
>>
>>
>>    miles with multi meg RELIABLE service this way.  There are other
>> customers at much shorter ranges that don't get reliable service, but
>>
>>
>>        that's caused by other issues :-).
>>
>>
>>      We run most of our cpe at pretty high power these days due to the
>> need
>>
>>
>>
>>
>>      to blow through the overpowered competition or just over all noise
>>
>>
>>        levels.
>>
>>
>>      Anyway, what gain are the antennas and where are they pointed?  How
>> much downtilt etc.
>>
>> How far are the customers from the tower?
>>
>> What polarity are the antennas?  All the same, or did you mix it up?
>>
>> What are the cpe radios?  What power, what antennas etc.
>>
>> If you had a 15 db transmit antenna and a 15 db transmit radio
>> shooting to a
>> 15 dB panel at 5 miles you should see an rssi of, -83 or so.  Legally
>>
>>
>>    you could have 6 more dB at the AP side giving you around -77 at the
>> cpe 5 miles out.
>>
>> Hope this helps!
>> marlon
>>
>> ----- Original Message -----
>> From: <m...@tc3net.com>
>> To: <wireless@wispa.org>
>> Sent: Saturday, June 13, 2009 1:09 PM
>> Subject: [WISPA] Radio Seperation
>>
>>
>>
>>
>>
>>        We've just installed a 3 sector 2.4 setup, at 145' with maxrad
>>
>>          120's.
>>
>>
>>
>>
>>
>>      I'm noticing the receive sensitivity on the AP's are about 15-20
>> db's
>>
>>
>>
>>
>>      different then what I see on the CPE's, tried a Tranzeo/Ubiquity
>>
>>
>>          radio.
>>
>>
>>      I'm using Ubiquity AP's, and they work fine on another 3 sector
>> setup
>>
>>
>>
>>
>>      I have, however this tower is an A-Frame. The tower owner won't
>> allow
>>
>>
>>
>>
>>      outside climbers so his guy did it, and he put one on each leg at
>>
>>
>>          145'
>>
>>
>>      back to back. If the radios were too close together even on
>> different
>>
>>
>>
>>
>>      channels, would the RX performance on the AP exhibit this behavior?
>> Only other change on this tower was RFLinx Quarter-wave arrestors in
>>
>>
>>          line.
>>
>>
>>      If I'm 3-5 miles away I can see on the CPE a RSSI of -65 to -75 for
>> example, on the AP the reading would be in the -90 to not even below
>>
>>
>>    the noise floor.
>>
>> Any thoughts would be appreciated as always.
>>
>> Regards
>> Michael Baird
>>
>>
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