Re: [WISPA] Multipath
2.4 gig. All products. I've found that g handles it better than b. But b handles interference better than g. Right tool, right job. 50% science, 62% black magic. Some days I really do love this business! grin marlon - Original Message - From: "Josh Luthman" To: "WISPA General List" Sent: Thursday, October 01, 2009 3:09 PM Subject: Re: [WISPA] Multipath > Marlon, > > Those experiences - what band and product? > > On 10/1/09, Marlon K. Schafer wrote: >> First, your signal is much too high. Multipath is a reflected signal. >> The >> newer radios hear quite nicely down to -94 or lower. The AVERAGE >> reflected >> signal is about 30dB. >> >> So if you have a signal any greater than -65 you'll be MORE likely to get >> multipath. It can't always be helped but I try >> >> If you think it might be multipath move the radio up or DOWN by a foot or >> so >> at a time. Sometimes I've had to put a radio very close to the ground or >> something in order to get it to work right. >> >> Up is the direction you want to go if you can, but sometimes down will >> actually work better. I've doubled people's speeds by moving the >> antennas >> down by as little as 2 feet. >> >> marlon >> >> - Original Message - >> From: "Mark McElvy" >> To: "WISPA General List" >> Sent: Tuesday, September 29, 2009 11:39 AM >> Subject: [WISPA] Multipath >> >> >>>I am curious if anyone thinks this is multipath and has a suggestion on >>> how to fix. >>> >>> >>> >>> This just happens to be my dads house, radio mounted to a j-mount on eve >>> of house, clear LOS to tower <1 mile away, -56 signal. This eve is over >>> the porch roof to the east and signal shoots over the south plane of the >>> roof which is an approx 30deg angle. I was over this morning and he is >>> complaining the Internet is not working and I go in to do some >>> troubleshooting. I setup a constant ping to the AP and I am getting >>> <1ms, I start to browse and the pings jump to >300ms and random lost >>> packets. >>> >>> Configure a new radio in the house and have a -75 signal in the house, >>> try the ping thing again and all seems fine. I replace he radio on the >>> roof and I am back to the poor ping times again. >>> >>> >>> >>> Now I don't understand multipath as well I should but it seems to make >>> sense in this case. Is it possible to reduce or remedy without moving >>> the radio to a totally different location? >>> >>> >>> >>> Mark McElvy >>> AccuBak Data Systems, Inc. >>> >>> >>> >>> >>> >>> >>> >>> >>> 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! 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/ >> > > > -- > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > "When you have eliminated the impossible, that which remains, however > improbable, must be the truth." > --- Sir Arthur Conan Doyle > > > > 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! 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/
Re: [WISPA] Multipath
In a related story - don't believe the polarity markings on an antenna unless you've verified them back at the shop. We've had batches of same-model antennas come in with some (but not all) of them marked incorrectly. Tom S. - Original Message - From: "Steve Barnes" To: "WISPA General List" Sent: Thursday, October 01, 2009 11:14 AM Subject: Re: [WISPA] Multipath > This is going way out there what happens if you turn your radio 90 > degrees. Last month I had a client who was installed wrong. Tower was > Horizontal and guys setup the radio vertical but it worked and they did > not know any better. I got checking the tower later and saw the client > was -79 at the tower. I called them in Chewed them out for installing > wrong and sent them back. They followed my orders and the signal at the > tower dropped to -59 I turned down the radio and stabilized it at -69. I > was happy. Next day the customer called and said could we come back and > fixed what we had changed. I started them doing pings and they were > terrible. So I drove out to the house. Messed with it for 1/2 hour. > Climbed to the radio turned it back to the Wrong Polarity and set the > power back and the speed and pings were perfect. I came back to the > office walked in the door and there was my installers standing there > waiting for an apology. I smiled, shrugged my shoulders and yelled "G > et back to work" Moral to the story if it's a very close install > sometimes it is too close and you need to make the radio work harder on a > wrong polarity. > > Steve Barnes > RC-WiFi Wireless Internet Service > > Character cannot be developed in ease and quiet. Only through experience > of trial and suffering can the soul be strengthened, vision cleared, > ambition inspired, and success achieved. > - Helen Keller > > > -Original Message- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Mike > Sent: Tuesday, September 29, 2009 3:30 PM > To: WISPA General List > Subject: Re: [WISPA] Multipath > > Multipath and/or scintillation. It looks like the sun is shining and > 65 degrees in Salem. Sun beating on that metal surface can cause > heat waves to rise in front of the antenna causing > scintillation. Sometimes this stuff is black magic and moving a CPE > a couple feet one way or another can make a world of difference. > > No trees or branches in the Fresnel zone waving in the breeze? I'd > try adjusting the tilt as suggested, them putting a pipe section in > the J mount and moving it up 2.5' or so. > > Hope you figure it out. Let the list know. > > At 01:39 PM 9/29/2009, you wrote: >>I am curious if anyone thinks this is multipath and has a suggestion on >>how to fix. >> >> >> >>This just happens to be my dads house, radio mounted to a j-mount on eve >>of house, clear LOS to tower <1 mile away, -56 signal. This eve is over >>the porch roof to the east and signal shoots over the south plane of the >>roof which is an approx 30deg angle. I was over this morning and he is >>complaining the Internet is not working and I go in to do some >>troubleshooting. I setup a constant ping to the AP and I am getting >><1ms, I start to browse and the pings jump to >300ms and random lost >>packets. >> >>Configure a new radio in the house and have a -75 signal in the house, >>try the ping thing again and all seems fine. I replace he radio on the >>roof and I am back to the poor ping times again. >> >> >> >>Now I don't understand multipath as well I should but it seems to make >>sense in this case. Is it possible to reduce or remedy without moving >>the radio to a totally different location? >> >> >> >>Mark McElvy >>AccuBak Data Systems, Inc. >> >> >> >> >> >> >> >> >>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! Join today! > http://signup.wispa.org/ > > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Un
Re: [WISPA] Multipath
Marlon, Those experiences - what band and product? On 10/1/09, Marlon K. Schafer wrote: > First, your signal is much too high. Multipath is a reflected signal. The > newer radios hear quite nicely down to -94 or lower. The AVERAGE reflected > signal is about 30dB. > > So if you have a signal any greater than -65 you'll be MORE likely to get > multipath. It can't always be helped but I try > > If you think it might be multipath move the radio up or DOWN by a foot or so > at a time. Sometimes I've had to put a radio very close to the ground or > something in order to get it to work right. > > Up is the direction you want to go if you can, but sometimes down will > actually work better. I've doubled people's speeds by moving the antennas > down by as little as 2 feet. > > marlon > > - Original Message - > From: "Mark McElvy" > To: "WISPA General List" > Sent: Tuesday, September 29, 2009 11:39 AM > Subject: [WISPA] Multipath > > >>I am curious if anyone thinks this is multipath and has a suggestion on >> how to fix. >> >> >> >> This just happens to be my dads house, radio mounted to a j-mount on eve >> of house, clear LOS to tower <1 mile away, -56 signal. This eve is over >> the porch roof to the east and signal shoots over the south plane of the >> roof which is an approx 30deg angle. I was over this morning and he is >> complaining the Internet is not working and I go in to do some >> troubleshooting. I setup a constant ping to the AP and I am getting >> <1ms, I start to browse and the pings jump to >300ms and random lost >> packets. >> >> Configure a new radio in the house and have a -75 signal in the house, >> try the ping thing again and all seems fine. I replace he radio on the >> roof and I am back to the poor ping times again. >> >> >> >> Now I don't understand multipath as well I should but it seems to make >> sense in this case. Is it possible to reduce or remedy without moving >> the radio to a totally different location? >> >> >> >> Mark McElvy >> AccuBak Data Systems, Inc. >> >> >> >> >> >> >> >> >> 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! 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/ > -- Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 "When you have eliminated the impossible, that which remains, however improbable, must be the truth." --- Sir Arthur Conan Doyle 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/
Re: [WISPA] Multipath
First, your signal is much too high. Multipath is a reflected signal. The newer radios hear quite nicely down to -94 or lower. The AVERAGE reflected signal is about 30dB. So if you have a signal any greater than -65 you'll be MORE likely to get multipath. It can't always be helped but I try If you think it might be multipath move the radio up or DOWN by a foot or so at a time. Sometimes I've had to put a radio very close to the ground or something in order to get it to work right. Up is the direction you want to go if you can, but sometimes down will actually work better. I've doubled people's speeds by moving the antennas down by as little as 2 feet. marlon - Original Message - From: "Mark McElvy" To: "WISPA General List" Sent: Tuesday, September 29, 2009 11:39 AM Subject: [WISPA] Multipath >I am curious if anyone thinks this is multipath and has a suggestion on > how to fix. > > > > This just happens to be my dads house, radio mounted to a j-mount on eve > of house, clear LOS to tower <1 mile away, -56 signal. This eve is over > the porch roof to the east and signal shoots over the south plane of the > roof which is an approx 30deg angle. I was over this morning and he is > complaining the Internet is not working and I go in to do some > troubleshooting. I setup a constant ping to the AP and I am getting > <1ms, I start to browse and the pings jump to >300ms and random lost > packets. > > Configure a new radio in the house and have a -75 signal in the house, > try the ping thing again and all seems fine. I replace he radio on the > roof and I am back to the poor ping times again. > > > > Now I don't understand multipath as well I should but it seems to make > sense in this case. Is it possible to reduce or remedy without moving > the radio to a totally different location? > > > > Mark McElvy > AccuBak Data Systems, Inc. > > > > > > > > > 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! 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/
Re: [WISPA] Multipath
This is going way out there what happens if you turn your radio 90 degrees. Last month I had a client who was installed wrong. Tower was Horizontal and guys setup the radio vertical but it worked and they did not know any better. I got checking the tower later and saw the client was -79 at the tower. I called them in Chewed them out for installing wrong and sent them back. They followed my orders and the signal at the tower dropped to -59 I turned down the radio and stabilized it at -69. I was happy. Next day the customer called and said could we come back and fixed what we had changed. I started them doing pings and they were terrible. So I drove out to the house. Messed with it for 1/2 hour. Climbed to the radio turned it back to the Wrong Polarity and set the power back and the speed and pings were perfect. I came back to the office walked in the door and there was my installers standing there waiting for an apology. I smiled, shrugged my shoulders and yelled "G et back to work" Moral to the story if it's a very close install sometimes it is too close and you need to make the radio work harder on a wrong polarity. Steve Barnes RC-WiFi Wireless Internet Service Character cannot be developed in ease and quiet. Only through experience of trial and suffering can the soul be strengthened, vision cleared, ambition inspired, and success achieved. - Helen Keller -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Mike Sent: Tuesday, September 29, 2009 3:30 PM To: WISPA General List Subject: Re: [WISPA] Multipath Multipath and/or scintillation. It looks like the sun is shining and 65 degrees in Salem. Sun beating on that metal surface can cause heat waves to rise in front of the antenna causing scintillation. Sometimes this stuff is black magic and moving a CPE a couple feet one way or another can make a world of difference. No trees or branches in the Fresnel zone waving in the breeze? I'd try adjusting the tilt as suggested, them putting a pipe section in the J mount and moving it up 2.5' or so. Hope you figure it out. Let the list know. At 01:39 PM 9/29/2009, you wrote: >I am curious if anyone thinks this is multipath and has a suggestion on >how to fix. > > > >This just happens to be my dads house, radio mounted to a j-mount on eve >of house, clear LOS to tower <1 mile away, -56 signal. This eve is over >the porch roof to the east and signal shoots over the south plane of the >roof which is an approx 30deg angle. I was over this morning and he is >complaining the Internet is not working and I go in to do some >troubleshooting. I setup a constant ping to the AP and I am getting ><1ms, I start to browse and the pings jump to >300ms and random lost >packets. > >Configure a new radio in the house and have a -75 signal in the house, >try the ping thing again and all seems fine. I replace he radio on the >roof and I am back to the poor ping times again. > > > >Now I don't understand multipath as well I should but it seems to make >sense in this case. Is it possible to reduce or remedy without moving >the radio to a totally different location? > > > >Mark McElvy >AccuBak Data Systems, Inc. > > > > > > > > >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! 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! 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/
Re: [WISPA] Multipath
Multipath and/or scintillation. It looks like the sun is shining and 65 degrees in Salem. Sun beating on that metal surface can cause heat waves to rise in front of the antenna causing scintillation. Sometimes this stuff is black magic and moving a CPE a couple feet one way or another can make a world of difference. No trees or branches in the Fresnel zone waving in the breeze? I'd try adjusting the tilt as suggested, them putting a pipe section in the J mount and moving it up 2.5' or so. Hope you figure it out. Let the list know. At 01:39 PM 9/29/2009, you wrote: >I am curious if anyone thinks this is multipath and has a suggestion on >how to fix. > > > >This just happens to be my dads house, radio mounted to a j-mount on eve >of house, clear LOS to tower <1 mile away, -56 signal. This eve is over >the porch roof to the east and signal shoots over the south plane of the >roof which is an approx 30deg angle. I was over this morning and he is >complaining the Internet is not working and I go in to do some >troubleshooting. I setup a constant ping to the AP and I am getting ><1ms, I start to browse and the pings jump to >300ms and random lost >packets. > >Configure a new radio in the house and have a -75 signal in the house, >try the ping thing again and all seems fine. I replace he radio on the >roof and I am back to the poor ping times again. > > > >Now I don't understand multipath as well I should but it seems to make >sense in this case. Is it possible to reduce or remedy without moving >the radio to a totally different location? > > > >Mark McElvy >AccuBak Data Systems, Inc. > > > > > > > > >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! 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/
Re: [WISPA] Multipath
You have a metal reflector between the AP and CPE - most definitely multipath. Can you aim it up 10 degrees? This fixes it for me (though I've never installed with a metal roof between the two radios). Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 "When you have eliminated the impossible, that which remains, however improbable, must be the truth." --- Sir Arthur Conan Doyle On Tue, Sep 29, 2009 at 3:02 PM, Mark McElvy wrote: > I am on the same AP with no issue and other customers are not talking if > they are having issues. > > Mark McElvy > AccuBak Data Systems, Inc. > > > -Original Message- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Josh Luthman > Sent: Tuesday, September 29, 2009 2:01 PM > To: WISPA General List > Subject: Re: [WISPA] Multipath > > Any issues, or are there any, with other stations on that same AP? > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > "When you have eliminated the impossible, that which remains, however > improbable, must be the truth." > --- Sir Arthur Conan Doyle > > > On Tue, Sep 29, 2009 at 2:59 PM, Mark McElvy > wrote: > > > It has been up for a few years and he has complained on and off. > > > > Mark McElvy > > AccuBak Data Systems, Inc. > > > > -Original Message- > > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] > On > > Behalf Of Bob Moldashel > > Sent: Tuesday, September 29, 2009 2:02 PM > > To: WISPA General List > > Subject: Re: [WISPA] Multipath > > > > Mark, > > > > Was this an existing installation and it just started acting up or has > > it been doing this since day one?? > > > > -B- > > > > > > --- > > > > > > > > > > > > > > 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! 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! 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! 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/
Re: [WISPA] Multipath
I am on the same AP with no issue and other customers are not talking if they are having issues. Mark McElvy AccuBak Data Systems, Inc. -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Josh Luthman Sent: Tuesday, September 29, 2009 2:01 PM To: WISPA General List Subject: Re: [WISPA] Multipath Any issues, or are there any, with other stations on that same AP? Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 "When you have eliminated the impossible, that which remains, however improbable, must be the truth." --- Sir Arthur Conan Doyle On Tue, Sep 29, 2009 at 2:59 PM, Mark McElvy wrote: > It has been up for a few years and he has complained on and off. > > Mark McElvy > AccuBak Data Systems, Inc. > > -Original Message- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Bob Moldashel > Sent: Tuesday, September 29, 2009 2:02 PM > To: WISPA General List > Subject: Re: [WISPA] Multipath > > Mark, > > Was this an existing installation and it just started acting up or has > it been doing this since day one?? > > -B- > > > --- > > > > > > 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! 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! 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/
Re: [WISPA] Multipath
Yes, that would be the South facing roof plane, 30 deg angle of metal roofing extending 40ft out in front and below the radio. Mark McElvy AccuBak Data Systems, Inc. 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/
Re: [WISPA] Multipath
Any issues, or are there any, with other stations on that same AP? Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 "When you have eliminated the impossible, that which remains, however improbable, must be the truth." --- Sir Arthur Conan Doyle On Tue, Sep 29, 2009 at 2:59 PM, Mark McElvy wrote: > It has been up for a few years and he has complained on and off. > > Mark McElvy > AccuBak Data Systems, Inc. > > -Original Message- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Bob Moldashel > Sent: Tuesday, September 29, 2009 2:02 PM > To: WISPA General List > Subject: Re: [WISPA] Multipath > > Mark, > > Was this an existing installation and it just started acting up or has > it been doing this since day one?? > > -B- > > > --- > > > > > > 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! 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/
Re: [WISPA] Multipath
It has been up for a few years and he has complained on and off. Mark McElvy AccuBak Data Systems, Inc. -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Bob Moldashel Sent: Tuesday, September 29, 2009 2:02 PM To: WISPA General List Subject: Re: [WISPA] Multipath Mark, Was this an existing installation and it just started acting up or has it been doing this since day one?? -B- --- 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/
Re: [WISPA] Multipath
First radio Tranzeo CPQ15 second was a Ubiquity NS2. I never noticed a signal fluctuation. Mark McElvy AccuBak Data Systems, Inc. -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Josh Luthman Sent: Tuesday, September 29, 2009 1:54 PM To: WISPA General List Subject: Re: [WISPA] Multipath Bump it up about 10 degrees and see if that helps your multipath issue. Does the signal strength stay at -57 or does it fluctuate? On MT gear it's very easy to identify it as you'll see -55 for the most part, then -70 for a quick moment. I'm assuming you're using Canopy here - watch the alignment tool page (I suggest having it refresh every 3 or 4 seconds) and see if it jumps around. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 " 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/
Re: [WISPA] Multipath
make that ARE there any On Tue, Sep 29, 2009 at 1:57 PM, Marco Coelho wrote: > Is there any large metal surfaces immediately in front of the radio > (antenna)? I've seen the metal rim of a brick fireplace stack cause > erratic behavior until we moved our antenna up a couple of feet. > > Marco > > On Tue, Sep 29, 2009 at 1:53 PM, Josh Luthman > wrote: >> Bump it up about 10 degrees and see if that helps your multipath issue. >> >> Does the signal strength stay at -57 or does it fluctuate? On MT gear it's >> very easy to identify it as you'll see -55 for the most part, then -70 for a >> quick moment. I'm assuming you're using Canopy here - watch the alignment >> tool page (I suggest having it refresh every 3 or 4 seconds) and see if it >> jumps around. >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> "When you have eliminated the impossible, that which remains, however >> improbable, must be the truth." >> --- Sir Arthur Conan Doyle >> >> >> On Tue, Sep 29, 2009 at 2:39 PM, Mark McElvy wrote: >> >>> I am curious if anyone thinks this is multipath and has a suggestion on >>> how to fix. >>> >>> >>> >>> This just happens to be my dads house, radio mounted to a j-mount on eve >>> of house, clear LOS to tower <1 mile away, -56 signal. This eve is over >>> the porch roof to the east and signal shoots over the south plane of the >>> roof which is an approx 30deg angle. I was over this morning and he is >>> complaining the Internet is not working and I go in to do some >>> troubleshooting. I setup a constant ping to the AP and I am getting >>> <1ms, I start to browse and the pings jump to >300ms and random lost >>> packets. >>> >>> Configure a new radio in the house and have a -75 signal in the house, >>> try the ping thing again and all seems fine. I replace he radio on the >>> roof and I am back to the poor ping times again. >>> >>> >>> >>> Now I don't understand multipath as well I should but it seems to make >>> sense in this case. Is it possible to reduce or remedy without moving >>> the radio to a totally different location? >>> >>> >>> >>> Mark McElvy >>> AccuBak Data Systems, Inc. >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> 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! 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/ >> > > > > -- > Marco C. Coelho > Argon Technologies Inc. > POB 875 > Greenville, TX 75403-0875 > 903-455-5036 > -- Marco C. Coelho Argon Technologies Inc. POB 875 Greenville, TX 75403-0875 903-455-5036 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/
Re: [WISPA] Multipath
Is there any large metal surfaces immediately in front of the radio (antenna)? I've seen the metal rim of a brick fireplace stack cause erratic behavior until we moved our antenna up a couple of feet. Marco On Tue, Sep 29, 2009 at 1:53 PM, Josh Luthman wrote: > Bump it up about 10 degrees and see if that helps your multipath issue. > > Does the signal strength stay at -57 or does it fluctuate? On MT gear it's > very easy to identify it as you'll see -55 for the most part, then -70 for a > quick moment. I'm assuming you're using Canopy here - watch the alignment > tool page (I suggest having it refresh every 3 or 4 seconds) and see if it > jumps around. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > "When you have eliminated the impossible, that which remains, however > improbable, must be the truth." > --- Sir Arthur Conan Doyle > > > On Tue, Sep 29, 2009 at 2:39 PM, Mark McElvy wrote: > >> I am curious if anyone thinks this is multipath and has a suggestion on >> how to fix. >> >> >> >> This just happens to be my dads house, radio mounted to a j-mount on eve >> of house, clear LOS to tower <1 mile away, -56 signal. This eve is over >> the porch roof to the east and signal shoots over the south plane of the >> roof which is an approx 30deg angle. I was over this morning and he is >> complaining the Internet is not working and I go in to do some >> troubleshooting. I setup a constant ping to the AP and I am getting >> <1ms, I start to browse and the pings jump to >300ms and random lost >> packets. >> >> Configure a new radio in the house and have a -75 signal in the house, >> try the ping thing again and all seems fine. I replace he radio on the >> roof and I am back to the poor ping times again. >> >> >> >> Now I don't understand multipath as well I should but it seems to make >> sense in this case. Is it possible to reduce or remedy without moving >> the radio to a totally different location? >> >> >> >> Mark McElvy >> AccuBak Data Systems, Inc. >> >> >> >> >> >> >> >> >> >> 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! 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/ > -- Marco C. Coelho Argon Technologies Inc. POB 875 Greenville, TX 75403-0875 903-455-5036 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/
Re: [WISPA] Multipath
Mark, Was this an existing installation and it just started acting up or has it been doing this since day one?? -B- Mark McElvy wrote: > I am curious if anyone thinks this is multipath and has a suggestion on > how to fix. > > > > This just happens to be my dads house, radio mounted to a j-mount on eve > of house, clear LOS to tower <1 mile away, -56 signal. This eve is over > the porch roof to the east and signal shoots over the south plane of the > roof which is an approx 30deg angle. I was over this morning and he is > complaining the Internet is not working and I go in to do some > troubleshooting. I setup a constant ping to the AP and I am getting > <1ms, I start to browse and the pings jump to >300ms and random lost > packets. > > Configure a new radio in the house and have a -75 signal in the house, > try the ping thing again and all seems fine. I replace he radio on the > roof and I am back to the poor ping times again. > > > > Now I don't understand multipath as well I should but it seems to make > sense in this case. Is it possible to reduce or remedy without moving > the radio to a totally different location? > > > > Mark McElvy > AccuBak Data Systems, Inc. > > > > > > > > > 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! 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/
Re: [WISPA] Multipath
Bump it up about 10 degrees and see if that helps your multipath issue. Does the signal strength stay at -57 or does it fluctuate? On MT gear it's very easy to identify it as you'll see -55 for the most part, then -70 for a quick moment. I'm assuming you're using Canopy here - watch the alignment tool page (I suggest having it refresh every 3 or 4 seconds) and see if it jumps around. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 "When you have eliminated the impossible, that which remains, however improbable, must be the truth." --- Sir Arthur Conan Doyle On Tue, Sep 29, 2009 at 2:39 PM, Mark McElvy wrote: > I am curious if anyone thinks this is multipath and has a suggestion on > how to fix. > > > > This just happens to be my dads house, radio mounted to a j-mount on eve > of house, clear LOS to tower <1 mile away, -56 signal. This eve is over > the porch roof to the east and signal shoots over the south plane of the > roof which is an approx 30deg angle. I was over this morning and he is > complaining the Internet is not working and I go in to do some > troubleshooting. I setup a constant ping to the AP and I am getting > <1ms, I start to browse and the pings jump to >300ms and random lost > packets. > > Configure a new radio in the house and have a -75 signal in the house, > try the ping thing again and all seems fine. I replace he radio on the > roof and I am back to the poor ping times again. > > > > Now I don't understand multipath as well I should but it seems to make > sense in this case. Is it possible to reduce or remedy without moving > the radio to a totally different location? > > > > Mark McElvy > AccuBak Data Systems, Inc. > > > > > > > > > > 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! 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] Multipath
I am curious if anyone thinks this is multipath and has a suggestion on how to fix. This just happens to be my dads house, radio mounted to a j-mount on eve of house, clear LOS to tower <1 mile away, -56 signal. This eve is over the porch roof to the east and signal shoots over the south plane of the roof which is an approx 30deg angle. I was over this morning and he is complaining the Internet is not working and I go in to do some troubleshooting. I setup a constant ping to the AP and I am getting <1ms, I start to browse and the pings jump to >300ms and random lost packets. Configure a new radio in the house and have a -75 signal in the house, try the ping thing again and all seems fine. I replace he radio on the roof and I am back to the poor ping times again. Now I don't understand multipath as well I should but it seems to make sense in this case. Is it possible to reduce or remedy without moving the radio to a totally different location? Mark McElvy AccuBak Data Systems, Inc. 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] Multipath
Jim: The term "multipath" is commonly used to describe the condition wherein a sent signal "arrives" at an antenna through more than one path (by something in addition to or other than a non-obstructed, line-of-sight link). Microwave signals are subject to a number of degradation modes including reflection, diffraction and diffusion-if you apply those terms and physical conditions to light waves, some of the concepts may become clearer than at first blush. I like to explain multipath this way: If you have ever watched analog broadcast TV signals being delivered by an antenna, you have probably seen channels with ghosts (shadows) in the pictures. This occurs when the signal arrives at the antenna both directly and also having been bounced off one or more "reflective" surfaces enroute. The bouncing produces slight delays (among other propagation glitches) forcing the receiver to try to process and display the same information multiple times in each frame. While the effect of this problem is annoying in an analog video environment, it can be 'fatal' in a digital data context. Phase shifts, slightly delayed reception of the same packets, etc. can all "translate" as noise, and can kill the link altogether. Unfortunately there is a lot more to be concerned with in a digital microwave system than signal level alone, even though having too much or too little signal can itself be a show stopper. Signal quality is difficult to quantify without proper equipment but quality problems are no less "deadly" than levels problems. Hope this helps, as quick and dirty as it is. Best, Ted E.J. Hatfield & Company 1-770-209-9236 - Office 1-770-209-9238 - Fax 1-770-560-0736 - Sprint 1-678-457-8411 - Cingular -Original Message- From: Jim Stout [mailto:[EMAIL PROTECTED] Sent: Friday, April 13, 2007 10:37 AM To: WISPA General List Subject: Re: [WISPA] Power Lines in the LOS path Marlon, The SL2 is one of the newest radios from Tranzeo. It's part of the CPQ family, but it's a Slim Line (much smaller in size.) Up until this install, they have gone in easy, and run great! Can you explain the "multipath" phenomenon? Thanks, Jim Jim Stout LTO Communications, LLC 15701 Henry Andrews Dr Pleasant Hill, MO 64080 (816) 305-1076 - Mobile (816) 497-0033 - Pager -- WISPA Wireless List: [EMAIL PROTECTED] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
