For 7 miles? Use the 23dbi ARC things. I get them from Streakwave. Jut ask for ARC wireless 23dbi panel/enclosures. Very lightweight solution (compared to a two foot dish!)
Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Mon, Feb 14, 2011 at 2:16 PM, Data Technology <[email protected]> wrote: > This was not my design. I would not have used a pac grid on a link like > this. Ice on them will cause them to drop signal. > I would have used a 2 ft dish for this link but I think I will look at the > arc panels. > > LaRoy > > > On 2/14/2011 12:20 PM, Jerry Richardson wrote: > > Agreed. The overall cost is not that high compared to the time lost > picking at it. > > > > I'd rather test and troubleshoot at the bench. > > > > - Jerry > > > > *From:* [email protected] > [mailto:[email protected]<[email protected]>] > *On Behalf Of *Josh Luthman > *Sent:* Monday, February 14, 2011 10:14 AM > *To:* WISPA General List > *Subject:* Re: [WISPA] Strange RF disconnect problem > > > > If it were me, I would check that LMR and all that other garbage. Use the > ARC 23dbi panel/enclosures. You'll lose 10dbi (less because of LMR400, > connectors, pigtails, N connectors) but you'll have less to worry about when > ice gets on the antenna (IME last week - none). > > Everything is enclosed and pretty and the mounting is easier then the grids > and those stupid U bolts. > > Every time I've tried to swap a radio, or a board, or an antenna, or > lmr400...it was a waste of time and money. Scrap the entire thing and do > everything in one clean swoop. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > On Mon, Feb 14, 2011 at 1:10 PM, Data Technology <[email protected]> wrote: > > After posting I recalculated what the signal strength should be and it > turns out to be mid 50's. > So I guess there is defiantly wrong in the rf system some where. > > > > On 2/14/2011 12:00 PM, Data Technology wrote: > > Sorry for the long post but I need some suggestions here guys. > > > > Customer has a 7.3 mile 5ghz link. > > MT 433AH on one end and MT 411AH on the other. > > Version 4.16 on both units. > > Both units have MT R52Hn cards. > > 28 db grids on both ends with 6-10ft lmr400 jumper. > > > > Signal strength is -65 to -65 on one end and -66 to -67 on the other. > > CCQ is 98 to 100% > > > > Configured as bridge wds on one end and station wds on the other. > > > > > > This customer is a school and when they came back from Christmas break > > the link was down. > > This is in a rural area and no other 5 ghz systems show up in a scan so > > it is a 50/50 shot at the one that is bad. > > We changed the card in one unit and that was not it so we changed the > > card in the other unit and the link came back up. > > It was not working 100% and would go down and up but the signal looked > > ok. It was at -70 at the time. > > The only way I could get it to stay up was to change to a 5meg bandwidth. > > > > The link finally stabilized with the 5 meg channel. > > This would have to do until we could go back and check cables and > > connections. > > > > Well it has worked ok for the most part since then but we have noticed > > that when it rains > > the link starts dropping out again even though the signal stays good > > when it is connected. > > > > Sounds like water in a connection so I went yesterday to check some > > connections and they look good. > > Had electrical tape, mastic, and electrical tape. I actually cut open > > one just to inspect and was dry. > > I know it only takes one connection to cause a problem but visual > > inspection of all connections looked ok. > > Next trip we will have new cables and new antenna. > > > > After I finished messing around with the first unit the link started > > going down and up. > > The strange thing about this is that when it is up the signal is a solid. > > About every 60 seconds the link would drop out and come right back up. > > It did this for about an hour and finally stabilized. Sounds like > > interference. > > > > Here are a few lines from both logfiles. > > > > 05:28:53 wireless,info 00:0C:42:62:E4:82@wlan1: disconnected, extensive > > data loss > > 05:29:00 wireless,info 00:0C:42:62:E4:82@wlan1: connected, wants WDS > > 05:30:01 wireless,info 00:0C:42:62:E4:82@wlan1: disconnected, extensive > > data loss > > 05:30:10 wireless,info 00:0C:42:62:E4:82@wlan1: connected, wants WDS > > 05:31:10 wireless,info 00:0C:42:62:E4:82@wlan1: disconnected, extensive > > data loss > > 05:31:19 wireless,info 00:0C:42:62:E4:82@wlan1: connected, wants WDS > > 05:32:20 wireless,info 00:0C:42:62:E4:82@wlan1: disconnected, extensive > > data loss > > 05:32:28 wireless,info 00:0C:42:62:E4:82@wlan1: connected, wants WDS > > 05:33:29 wireless,info 00:0C:42:62:E4:82@wlan1: disconnected, extensive > > data loss > > 05:33:37 wireless,info 00:0C:42:62:E4:82@wlan1: connected, wants WDS > > > > > > feb/13 16:14:51 wireless,info 00:0C:42:62:E0:A6@wlan1: lost connection, > > not polled for too long > > feb/13 16:14:58 wireless,info 00:0C:42:62:E0:A6@wlan1 established > > connection on 5200, SSID Hillview > > feb/13 16:16:01 wireless,info 00:0C:42:62:E0:A6@wlan1: lost connection, > > not polled for too long > > feb/13 16:16:08 wireless,info 00:0C:42:62:E0:A6@wlan1 established > > connection on 5200, SSID Hillview > > feb/13 16:17:10 wireless,info 00:0C:42:62:E0:A6@wlan1: lost connection, > > not polled for too long > > feb/13 16:17:17 wireless,info 00:0C:42:62:E0:A6@wlan1 established > > connection on 5200, SSID Hillview > > feb/13 16:18:19 wireless,info 00:0C:42:62:E0:A6@wlan1: lost connection, > > not polled for too long > > feb/13 16:18:26 wireless,info 00:0C:42:62:E0:A6@wlan1 established > > connection on 5200, SSID Hillview > > feb/13 16:19:28 wireless,info 00:0C:42:62:E0:A6@wlan1: lost connection, > > not polled for too long > > feb/13 16:19:35 wireless,info 00:0C:42:62:E0:A6@wlan1 established > > connection on 5200, SSID Hillview > > > > > > My Conclustions are possibly 2 problems. > > > > 1. Water somewhere ? > > I will have to check each connection and or replace jumper cable > > and possibly antenna. > > Has anyone seen the grid element go bad and leak? > > > > 2. Interference ? > > Maybe need spectrum analyzer to check things out. > > What is the timing of a radar signal sweep? > > > > Also, one tower has a lot of slack in the guy wires and it was moving a > > lot more than I liked in the wind yesterday. > > I think that might be a problem but I don't think it would cause it to > > drop every 60 seconds. > > > > > > If you made it this far, thank for reading. > > > > LaRoy McCann > > Data Technology > > Trumann, AR > > > > > > > > > -------------------------------------------------------------------------------- > > WISPA Wants You! 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