[WISPA] 11GHz fade margin
I'm looking at deploying some 11GHz gear. I would like to do one path in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be fine with it. Is anyone else pushing 11GHz this far? -- 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] 11GHz fade margin
We have a ~22 mile DragonWave Horizon Compact 11GHz link (6 ft dishes) that is 100ft AMSL at one end and 3500ft at the other. Attached are the modem RSL and equalizer stress graphs for the last year. Looking over the last month or two, I can see 2-5dB variations in RSL, but nothing more significant than that. On the other hand, we have some 10 mile links (nearly same height at both ends) that vary 10-20dB in the early morning during early spring and early fall (we assume due to ducting). So I guess it really comes down to location. But for my $0.02 I'd say it's possible. -Kristian On Tue, 2010-09-28 at 11:51 -0500, Marco Coelho wrote: > I'm looking at deploying some 11GHz gear. I would like to do one path > in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > fine with it. > > Is anyone else pushing 11GHz this far? > <><> 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] 11GHz fade margin
Marco, In Maryland, to get 270mbps reliably, I try not to do any link in 11Ghz beyond 10 miles or so with 3ft dishes, to get 99.999%. Rain fade calculated at about 18db fade in that situation. But still, in heaviest rain, I dropped link a few times. Obviously with lowest modulation, larger dishes, and lower 9 expectations, in dryer climates, you can go much much farther. Using DragonWave's tool, with Greenville, TX rain data, 6ft dishes both sides, Highpower (19.5db), 40Mhz, model HC277, you show -42dbm with about a 17.5db fade margin, listing 99.978% uptime. (Trango's APEX or GIGAPLUS probably does as far if not farther, I just didn't have the Trango tool handy while writing this) My point here is, your link has 17db rain margin for a 27mile link in an area with a higher rain rate (I think around 66mm/hr), accomplishing a lower fade margin than I have for my 10 mile links here in Maryland where the rain rate might be around 48mm/hr. So... same fade margin, but your link three times longer. Your link will likely drop much more frequently. But will it? There is a misconception that a link three times longer could have three times the fade, which is not true, because the rain causing the fade rarely covers a wide area. For example, the rain storm might just be raining over one mile of the path, regardless of the length of the path. What is a critical factor is the direction of your link, and the likeliness of whether the Rain storm would just cross your link path once (moving perpandicular), or whether rain storm likely would travel along the path of your link in parallel. If the storm followed the path of your link, moving 1 mile at a time along the path from one end to the other, the duration in which the rain storm would effect your path would be much longer. So not only is it useful to predict the heaviest rain and duration in an area, but also the directions storms likely move. That was a mistake I made... I have a backhaul three cell sites in a row 10 miles apart, and almost always when a storm comes through, it hits each and every one of the three tower one at a time after each other, as the storm migrates. Thus, if a storm causes an outage it causes it three times, once for each link it hits. If my towers were aligned perpandicutlar, I'd have one third the amount of outages or downtime. So yes, the 27mile link can be accomplished with 11Ghz. But yes, you will have some downtime, and you need to deside if that can be tolerated for the link's pupose. At Full modulation the tool says 728min of outages. You'll have to rely on adaptive modulation, and the lower modulations speeds during rain and fade. At 100mbps it has 37db fade margine, the downtime drops to only 40min/yr, (99.997%) which is way more acceptable. You can do some calcs and see that if you changed the design to be three 19 mile hops, and the uptime would go down to only 11 min/yr w/ adaptive modulation down to100mb. But then, you'd have 1/3 more expense. I guess this boils down to whether your need of capacity versus uptime is more important. a 100mbps 5.8Ghz or 6Ghz link will have much better uptime at 27miles. If you need higher capacity, then 11Ghz will give it to you, most of the time 99.97% of it, but you'll have some occassional down time. What I'm learning is to both 1) trust the path calc tools, but 2) also to realize there are other factors that can degrade the real world results, and should look at the tool as being the best case. Thinks that can contribute to worse are antennas that move, antennas that get misaligned, noise that develops, cables that fail, adaptive modulation or rebooting slow to respond, that could result in additional or premature downtime. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: "Marco Coelho" To: "WISPA General List" Sent: Tuesday, September 28, 2010 12:51 PM Subject: [WISPA] 11GHz fade margin > I'm looking at deploying some 11GHz gear. I would like to do one path > in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > fine with it. > > Is anyone else pushing 11GHz this far? > > -- > 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/
Re: [WISPA] 11GHz fade margin
Tom, What make/model of 11 GHz gear are you using? One particular manufacturer shows 11 GHz performing with 5 nines for spans in excess of 20 miles using standard high performance 2.6 ft antennas. I was just curious what your manufacturer forecasts vs real life. Thanks, James R. Collins 255 Pine Avenue North Oldsmar, FL 34677 813-891-4774 Direct 813-416-4039 Cell 813-891-4712 Fax -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Tom DeReggi Sent: Tuesday, September 28, 2010 5:26 PM To: WISPA General List Subject: Re: [WISPA] 11GHz fade margin Marco, In Maryland, to get 270mbps reliably, I try not to do any link in 11Ghz beyond 10 miles or so with 3ft dishes, to get 99.999%. Rain fade calculated at about 18db fade in that situation. But still, in heaviest rain, I dropped link a few times. Obviously with lowest modulation, larger dishes, and lower 9 expectations, in dryer climates, you can go much much farther. Using DragonWave's tool, with Greenville, TX rain data, 6ft dishes both sides, Highpower (19.5db), 40Mhz, model HC277, you show -42dbm with about a 17.5db fade margin, listing 99.978% uptime. (Trango's APEX or GIGAPLUS probably does as far if not farther, I just didn't have the Trango tool handy while writing this) My point here is, your link has 17db rain margin for a 27mile link in an area with a higher rain rate (I think around 66mm/hr), accomplishing a lower fade margin than I have for my 10 mile links here in Maryland where the rain rate might be around 48mm/hr. So... same fade margin, but your link three times longer. Your link will likely drop much more frequently. But will it? There is a misconception that a link three times longer could have three times the fade, which is not true, because the rain causing the fade rarely covers a wide area. For example, the rain storm might just be raining over one mile of the path, regardless of the length of the path. What is a critical factor is the direction of your link, and the likeliness of whether the Rain storm would just cross your link path once (moving perpandicular), or whether rain storm likely would travel along the path of your link in parallel. If the storm followed the path of your link, moving 1 mile at a time along the path from one end to the other, the duration in which the rain storm would effect your path would be much longer. So not only is it useful to predict the heaviest rain and duration in an area, but also the directions storms likely move. That was a mistake I made... I have a backhaul three cell sites in a row 10 miles apart, and almost always when a storm comes through, it hits each and every one of the three tower one at a time after each other, as the storm migrates. Thus, if a storm causes an outage it causes it three times, once for each link it hits. If my towers were aligned perpandicutlar, I'd have one third the amount of outages or downtime. So yes, the 27mile link can be accomplished with 11Ghz. But yes, you will have some downtime, and you need to deside if that can be tolerated for the link's pupose. At Full modulation the tool says 728min of outages. You'll have to rely on adaptive modulation, and the lower modulations speeds during rain and fade. At 100mbps it has 37db fade margine, the downtime drops to only 40min/yr, (99.997%) which is way more acceptable. You can do some calcs and see that if you changed the design to be three 19 mile hops, and the uptime would go down to only 11 min/yr w/ adaptive modulation down to100mb. But then, you'd have 1/3 more expense. I guess this boils down to whether your need of capacity versus uptime is more important. a 100mbps 5.8Ghz or 6Ghz link will have much better uptime at 27miles. If you need higher capacity, then 11Ghz will give it to you, most of the time 99.97% of it, but you'll have some occassional down time. What I'm learning is to both 1) trust the path calc tools, but 2) also to realize there are other factors that can degrade the real world results, and should look at the tool as being the best case. Thinks that can contribute to worse are antennas that move, antennas that get misaligned, noise that develops, cables that fail, adaptive modulation or rebooting slow to respond, that could result in additional or premature downtime. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: "Marco Coelho" To: "WISPA General List" Sent: Tuesday, September 28, 2010 12:51 PM Subject: [WISPA] 11GHz fade margin > I'm looking at deploying some 11GHz gear. I would like to do one path > in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > fine with it. > > Is anyone else pushing 11GHz this far? > &g
Re: [WISPA] 11GHz fade margin
On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: > I'm looking at deploying some 11GHz gear. I would like to do one path > in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > fine with it. > > I have a pair of Trango Apex radios in that band, for a 22-mile link. Four foot antennas. One side is about 130' AGL, the other is (I think) 250'. There have been some thermal ducting issues over the last few months - at least I assume it's thermal ducting. Occasionally, for a minute or two the link will lose 15-20 points of SNR, and that often pushes the error rate high enough that the radios temporarily lose modem lock. Almost always happens just before or after dawn (give or take an hour). It usually fixes itself within a minute or two, fortunately. Probably qualifies for four-nines reliability, which is "good enough" for my purposes. David Smith MVN.net 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] 11GHz fade margin
We're looking at the exalt ExploreAir for these links. Anyone using them in 11 GHz? I'd like some first hand feedback. Marco On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: > > On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: >> >> I'm looking at deploying some 11GHz gear. I would like to do one path >> in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. >> Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be >> fine with it. >> > > I have a pair of Trango Apex radios in that band, for a 22-mile link. Four > foot antennas. One side is about 130' AGL, the other is (I think) 250'. > There have been some thermal ducting issues over the last few months - at > least I assume it's thermal ducting. Occasionally, for a minute or two the > link will lose 15-20 points of SNR, and that often pushes the error rate > high enough that the radios temporarily lose modem lock. Almost always > happens just before or after dawn (give or take an hour). It usually fixes > itself within a minute or two, fortunately. Probably qualifies for > four-nines reliability, which is "good enough" for my purposes. > David Smith > MVN.net > > > > 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] 11GHz fade margin
Why Exalt over Dragonwave or SAF? On 09/29/2010 12:49 PM, Marco Coelho wrote: We're looking at the exalt ExploreAir for these links. Anyone using them in 11 GHz? I'd like some first hand feedback. Marco On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: I'm looking at deploying some 11GHz gear. I would like to do one path in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be fine with it. I have a pair of Trango Apex radios in that band, for a 22-mile link. Four foot antennas. One side is about 130' AGL, the other is (I think) 250'. There have been some thermal ducting issues over the last few months - at least I assume it's thermal ducting. Occasionally, for a minute or two the link will lose 15-20 points of SNR, and that often pushes the error rate high enough that the radios temporarily lose modem lock. Almost always happens just before or after dawn (give or take an hour). It usually fixes itself within a minute or two, fortunately. Probably qualifies for four-nines reliability, which is "good enough" for my purposes. David Smith MVN.net 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] 11GHz fade margin
min/yr error may not be proportional to rain link avail% because min/yr error is based on "total link availability" which includes both rain and multi-path. Obviously, each manufacturers tool will yield slightly different results based on what the specific radio's receive sensitivity and power level is for that brand, and what modulations that it supports. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: "Collins, Jim" To: "WISPA General List" Sent: Wednesday, September 29, 2010 1:49 PM Subject: Re: [WISPA] 11GHz fade margin > Tom, > > What make/model of 11 GHz gear are you using? One particular > manufacturer shows 11 GHz performing with 5 nines for spans in excess of > 20 miles using standard high performance 2.6 ft antennas. I was just > curious what your manufacturer forecasts vs real life. > > Thanks, > > James R. Collins > > 255 Pine Avenue North > Oldsmar, FL 34677 > 813-891-4774 Direct > 813-416-4039 Cell > 813-891-4712 Fax > > > -Original Message- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Tom DeReggi > Sent: Tuesday, September 28, 2010 5:26 PM > To: WISPA General List > Subject: Re: [WISPA] 11GHz fade margin > > Marco, > > In Maryland, to get 270mbps reliably, I try not to do any link in 11Ghz > beyond 10 miles or so with 3ft dishes, to get 99.999%. Rain fade > calculated > at about 18db fade in that situation. But still, in heaviest rain, I > dropped > link a few times. > > Obviously with lowest modulation, larger dishes, and lower 9 > expectations, > in dryer climates, you can go much much farther. > Using DragonWave's tool, with Greenville, TX rain data, 6ft dishes both > sides, Highpower (19.5db), 40Mhz, model HC277, you show -42dbm with > about a > 17.5db fade margin, listing 99.978% uptime. (Trango's APEX or GIGAPLUS > probably does as far if not farther, I just didn't have the Trango tool > handy while writing this) > > My point here is, your link has 17db rain margin for a 27mile link in an > > area with a higher rain rate (I think around 66mm/hr), accomplishing a > lower > fade margin than I have for my 10 mile links here in Maryland where the > rain > rate might be around 48mm/hr. So... same fade margin, but your link > three > times longer. Your link will likely drop much more frequently. But will > it? > There is a misconception that a link three times longer could have three > > times the fade, which is not true, because the rain causing the fade > rarely > covers a wide area. For example, the rain storm might just be raining > over > one mile of the path, regardless of the length of the path. What is a > critical factor is the direction of your link, and the likeliness of > whether > the Rain storm would just cross your link path once (moving > perpandicular), > or whether rain storm likely would travel along the path of your link in > > parallel. If the storm followed the path of your link, moving 1 mile at > a > time along the path from one end to the other, the duration in which the > > rain storm would effect your path would be much longer. So not only is > it > useful to predict the heaviest rain and duration in an area, but also > the > directions storms likely move. > > That was a mistake I made... I have a backhaul three cell sites in a row > 10 > miles apart, and almost always when a storm comes through, it hits each > and > every one of the three tower one at a time after each other, as the > storm > migrates. Thus, if a storm causes an outage it causes it three times, > once > for each link it hits. If my towers were aligned perpandicutlar, I'd > have > one third the amount of outages or downtime. > > So yes, the 27mile link can be accomplished with 11Ghz. But yes, you > will > have some downtime, and you need to deside if that can be tolerated for > the > link's pupose. At Full modulation the tool says 728min of outages. > You'll > have to rely on adaptive modulation, and the lower modulations speeds > during > rain and fade. At 100mbps it has 37db fade margine, the downtime drops > to > only 40min/yr, (99.997%) which is way more acceptable. > > You can do some calcs and see that if you changed the design to be three > 19 > mile hops, and the uptime would go down to only 11 min/yr w/ adaptive > modulation down to100mb. But then, you'd have 1/3 more expense. > > I guess this boils down to whether your need of capacity versus uptime > is > more important. a 100mbps 5.8Ghz or 6Ghz link will have much better > uptime > at 27miles. > If you need high
Re: [WISPA] 11GHz fade margin
> Why Exalt over Dragonwave or SAF? I cant answer for Exalt, as not familiar with the product but can answer regarding SAF SAF is a great radio. Its affordable, and a nice package available from distribution. But I believe the SAF radio has significantly lower TX power. I dont remember exactly but think it was around 13-15db. My point is that its considerably less TX power than Trango standard or Dragonwave HP versions. So the SAF is not as good a choice for longer range links that are pushing the distance specs. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: Matt Jenkins To: WISPA General List Sent: Wednesday, September 29, 2010 3:56 PM Subject: Re: [WISPA] 11GHz fade margin Why Exalt over Dragonwave or SAF? On 09/29/2010 12:49 PM, Marco Coelho wrote: We're looking at the exalt ExploreAir for these links. Anyone using them in 11 GHz? I'd like some first hand feedback. Marco On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: I'm looking at deploying some 11GHz gear. I would like to do one path in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be fine with it. I have a pair of Trango Apex radios in that band, for a 22-mile link. Four foot antennas. One side is about 130' AGL, the other is (I think) 250'. There have been some thermal ducting issues over the last few months - at least I assume it's thermal ducting. Occasionally, for a minute or two the link will lose 15-20 points of SNR, and that often pushes the error rate high enough that the radios temporarily lose modem lock. Almost always happens just before or after dawn (give or take an hour). It usually fixes itself within a minute or two, fortunately. Probably qualifies for four-nines reliability, which is "good enough" for my purposes. David Smith MVN.net 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] 11GHz fade margin
Thought I would chime in since I'm using the SAF lumina in my network: The standard Lumina at 11GHz does up to +12 dBm at 256QAM and +19 dBm at QPSK.SAF designed this radio specifically for lower power applications (solar etc). and has a typical power consumption around 25W per unit. They have a high power model that does +25 at QPSK and +17 at 256 QAM at 11GHz. Pat Wed, Sep 29, 2010 at 06:18:28PM -0400, Tom DeReggi wrote: > > Why Exalt over Dragonwave or SAF? > > I cant answer for Exalt, as not familiar with the product but can answer > regarding SAF > > SAF is a great radio. Its affordable, and a nice package available from > distribution. But > > I believe the SAF radio has significantly lower TX power. I dont remember > exactly but think it was around 13-15db. > My point is that its considerably less TX power than Trango standard or > Dragonwave HP versions. > > So the SAF is not as good a choice for longer range links that are pushing > the distance specs. > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > - Original Message - > From: Matt Jenkins > To: WISPA General List > Sent: Wednesday, September 29, 2010 3:56 PM > Subject: Re: [WISPA] 11GHz fade margin > > > Why Exalt over Dragonwave or SAF? > > On 09/29/2010 12:49 PM, Marco Coelho wrote: > We're looking at the exalt ExploreAir for these links. Anyone using > them in 11 GHz? > I'd like some first hand feedback. > > Marco > > On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: > On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: > I'm looking at deploying some 11GHz gear. I would like to do one path > in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > fine with it. > > I have a pair of Trango Apex radios in that band, for a 22-mile link. > Four > foot antennas. One side is about 130' AGL, the other is (I think) 250'. > There have been some thermal ducting issues over the last few months - at > least I assume it's thermal ducting. Occasionally, for a minute or two the > link will lose 15-20 points of SNR, and that often pushes the error rate > high enough that the radios temporarily lose modem lock. Almost always > happens just before or after dawn (give or take an hour). It usually fixes > itself within a minute or two, fortunately. Probably qualifies for > four-nines reliability, which is "good enough" for my purposes. > David Smith > MVN.net > > > > 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] 11GHz fade margin
My lumina in the lab was 35 watts for 0dbm... On Sep 29, 2010 6:57 PM, "Patrick Cole" wrote: > Thought I would chime in since I'm using the SAF lumina in my network: > > The standard Lumina at 11GHz does up to +12 dBm at 256QAM and > +19 dBm at QPSK. SAF designed this radio specifically for > lower power applications (solar etc). and has a typical power > consumption around 25W per unit. > > They have a high power model that does +25 at QPSK and +17 at 256 QAM > at 11GHz. > > Pat > > Wed, Sep 29, 2010 at 06:18:28PM -0400, Tom DeReggi wrote: > > >> > Why Exalt over Dragonwave or SAF? >> >> I cant answer for Exalt, as not familiar with the product but can answer regarding SAF >> >> SAF is a great radio. Its affordable, and a nice package available from distribution. But >> >> I believe the SAF radio has significantly lower TX power. I dont remember exactly but think it was around 13-15db. >> My point is that its considerably less TX power than Trango standard or Dragonwave HP versions. >> >> So the SAF is not as good a choice for longer range links that are pushing the distance specs. >> >> >> Tom DeReggi >> RapidDSL & Wireless, Inc >> IntAirNet- Fixed Wireless Broadband >> >> >> - Original Message - >> From: Matt Jenkins >> To: WISPA General List >> Sent: Wednesday, September 29, 2010 3:56 PM >> Subject: Re: [WISPA] 11GHz fade margin >> >> >> Why Exalt over Dragonwave or SAF? >> >> On 09/29/2010 12:49 PM, Marco Coelho wrote: >> We're looking at the exalt ExploreAir for these links. Anyone using >> them in 11 GHz? >> I'd like some first hand feedback. >> >> Marco >> >> On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: >> On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: >> I'm looking at deploying some 11GHz gear. I would like to do one path >> in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. >> Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be >> fine with it. >> >> I have a pair of Trango Apex radios in that band, for a 22-mile link. Four >> foot antennas. One side is about 130' AGL, the other is (I think) 250'. >> There have been some thermal ducting issues over the last few months - at >> least I assume it's thermal ducting. Occasionally, for a minute or two the >> link will lose 15-20 points of SNR, and that often pushes the error rate >> high enough that the radios temporarily lose modem lock. Almost always >> happens just before or after dawn (give or take an hour). It usually fixes >> itself within a minute or two, fortunately. Probably qualifies for >> four-nines reliability, which is "good enough" for my purposes. >> David Smith >> MVN.net >> >> >> >> 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/ 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] 11GHz fade margin
Mine seem to be running steady at 27-28 W at 256QAM but with lower modulation they drop a little. Wed, Sep 29, 2010 at 07:03:53PM -0400, Josh Luthman wrote: > My lumina in the lab was 35 watts for 0dbm... > On Sep 29, 2010 6:57 PM, "Patrick Cole" wrote: > > Thought I would chime in since I'm using the SAF lumina in my network: > > > > The standard Lumina at 11GHz does up to +12 dBm at 256QAM and > > +19 dBm at QPSK. SAF designed this radio specifically for > > lower power applications (solar etc). and has a typical power > > consumption around 25W per unit. > > > > They have a high power model that does +25 at QPSK and +17 at 256 QAM > > at 11GHz. > > > > Pat > > > > Wed, Sep 29, 2010 at 06:18:28PM -0400, Tom DeReggi wrote: > > > > > >> > Why Exalt over Dragonwave or SAF? > >> > >> I cant answer for Exalt, as not familiar with the product but can > answer regarding SAF > >> > >> SAF is a great radio. Its affordable, and a nice package available from > distribution. But > >> > >> I believe the SAF radio has significantly lower TX power. I dont remember > exactly but think it was around 13-15db. > >> My point is that its considerably less TX power than Trango standard or > Dragonwave HP versions. > >> > >> So the SAF is not as good a choice for longer range links that are > pushing the distance specs. > >> > >> > >> Tom DeReggi > >> RapidDSL & Wireless, Inc > >> IntAirNet- Fixed Wireless Broadband > >> > >> > >> - Original Message - > >> From: Matt Jenkins > >> To: WISPA General List > >> Sent: Wednesday, September 29, 2010 3:56 PM > >> Subject: Re: [WISPA] 11GHz fade margin > >> > >> > >> Why Exalt over Dragonwave or SAF? > >> > >> On 09/29/2010 12:49 PM, Marco Coelho wrote: > >> We're looking at the exalt ExploreAir for these links. Anyone using > >> them in 11 GHz? > >> I'd like some first hand feedback. > >> > >> Marco > >> > >> On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: > >> On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: > >> I'm looking at deploying some 11GHz gear. I would like to do one path > >> in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > >> Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > >> fine with it. > >> > >> I have a pair of Trango Apex radios in that band, for a 22-mile link. > Four > >> foot antennas. One side is about 130' AGL, the other is (I think) 250'. > >> There have been some thermal ducting issues over the last few months - at > >> least I assume it's thermal ducting. Occasionally, for a minute or two > the > >> link will lose 15-20 points of SNR, and that often pushes the error rate > >> high enough that the radios temporarily lose modem lock. Almost always > >> happens just before or after dawn (give or take an hour). It usually > fixes > >> itself within a minute or two, fortunately. Probably qualifies for > >> four-nines reliability, which is "good enough" for my purposes. > >> David Smith > >> MVN.net > >> > >> > >> > > >> 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/ > >> > >> > >&g
Re: [WISPA] 11GHz fade margin
> The standard Lumina at 11GHz does up to +12 dBm at 256QAM and > +19 dBm at QPSK. Thanks for posting the complete accurate data. Note: Trango standard does 22dbm QPSK and 19dbm 256QAM, thus longer range. > They have a high power model that does +25 at QPSK and +17 at 256 QAM > at 11GHz. Thats much better, and good to know... Didn't realize that, since its not publisized on their web spec sheet, I last got. Quick question on connectors I saw that they offer it in dual CAT5 or Dual Fiber, and the spec sheet showed a picture of the fiber ports. What type fiber connector is that? It didn't look standard, from the photo. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: "Patrick Cole" To: "WISPA General List" Sent: Wednesday, September 29, 2010 6:56 PM Subject: Re: [WISPA] 11GHz fade margin > Thought I would chime in since I'm using the SAF lumina in my network: > > The standard Lumina at 11GHz does up to +12 dBm at 256QAM and > +19 dBm at QPSK.SAF designed this radio specifically for > lower power applications (solar etc). and has a typical power > consumption around 25W per unit. > > They have a high power model that does +25 at QPSK and +17 at 256 QAM > at 11GHz. > > Pat > > Wed, Sep 29, 2010 at 06:18:28PM -0400, Tom DeReggi wrote: > > >> > Why Exalt over Dragonwave or SAF? >> >> I cant answer for Exalt, as not familiar with the product but can >> answer regarding SAF >> >> SAF is a great radio. Its affordable, and a nice package available from >> distribution. But >> >> I believe the SAF radio has significantly lower TX power. I dont remember >> exactly but think it was around 13-15db. >> My point is that its considerably less TX power than Trango standard or >> Dragonwave HP versions. >> >> So the SAF is not as good a choice for longer range links that are >> pushing the distance specs. >> >> >> Tom DeReggi >> RapidDSL & Wireless, Inc >> IntAirNet- Fixed Wireless Broadband >> >> >> - Original Message - >> From: Matt Jenkins >> To: WISPA General List >> Sent: Wednesday, September 29, 2010 3:56 PM >> Subject: Re: [WISPA] 11GHz fade margin >> >> >> Why Exalt over Dragonwave or SAF? >> >> On 09/29/2010 12:49 PM, Marco Coelho wrote: >> We're looking at the exalt ExploreAir for these links. Anyone using >> them in 11 GHz? >> I'd like some first hand feedback. >> >> Marco >> >> On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: >> On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: >> I'm looking at deploying some 11GHz gear. I would like to do one >> path >> in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. >> Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be >> fine with it. >> >> I have a pair of Trango Apex radios in that band, for a 22-mile >> link. Four >> foot antennas. One side is about 130' AGL, the other is (I think) 250'. >> There have been some thermal ducting issues over the last few months - at >> least I assume it's thermal ducting. Occasionally, for a minute or two >> the >> link will lose 15-20 points of SNR, and that often pushes the error rate >> high enough that the radios temporarily lose modem lock. Almost always >> happens just before or after dawn (give or take an hour). It usually >> fixes >> itself within a minute or two, fortunately. Probably qualifies for >> four-nines reliability, which is "good enough" for my purposes. >> David Smith >> MVN.net >> >> >> >> 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 Wirele
Re: [WISPA] 11GHz fade margin
Today is a day that makes me the best person in the world for that question. The SAF Lumina has a (famousguy-otherfamousguy) port where you can actually screw it in - good for outdoor use. This jumper has an LC connector. I am using the Chinese enclosures and an LC adapter to connect to the main fiber run. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Thu, Sep 30, 2010 at 3:23 PM, Tom DeReggi wrote: > > The standard Lumina at 11GHz does up to +12 dBm at 256QAM and > > +19 dBm at QPSK. > > Thanks for posting the complete accurate data. > > Note: Trango standard does 22dbm QPSK and 19dbm 256QAM, thus longer range. > > > They have a high power model that does +25 at QPSK and +17 at 256 QAM > > at 11GHz. > > Thats much better, and good to know... > Didn't realize that, since its not publisized on their web spec sheet, I > last got. > > Quick question on connectors > I saw that they offer it in dual CAT5 or Dual Fiber, and the spec sheet > showed a picture of the fiber ports. > What type fiber connector is that? It didn't look standard, from the photo. > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > - Original Message - > From: "Patrick Cole" > To: "WISPA General List" > Sent: Wednesday, September 29, 2010 6:56 PM > Subject: Re: [WISPA] 11GHz fade margin > > > > Thought I would chime in since I'm using the SAF lumina in my network: > > > > The standard Lumina at 11GHz does up to +12 dBm at 256QAM and > > +19 dBm at QPSK.SAF designed this radio specifically for > > lower power applications (solar etc). and has a typical power > > consumption around 25W per unit. > > > > They have a high power model that does +25 at QPSK and +17 at 256 QAM > > at 11GHz. > > > > Pat > > > > Wed, Sep 29, 2010 at 06:18:28PM -0400, Tom DeReggi wrote: > > > > > >> > Why Exalt over Dragonwave or SAF? > >> > >> I cant answer for Exalt, as not familiar with the product but can > >> answer regarding SAF > >> > >> SAF is a great radio. Its affordable, and a nice package available from > >> distribution. But > >> > >> I believe the SAF radio has significantly lower TX power. I dont > remember > >> exactly but think it was around 13-15db. > >> My point is that its considerably less TX power than Trango standard or > >> Dragonwave HP versions. > >> > >> So the SAF is not as good a choice for longer range links that are > >> pushing the distance specs. > >> > >> > >> Tom DeReggi > >> RapidDSL & Wireless, Inc > >> IntAirNet- Fixed Wireless Broadband > >> > >> > >> - Original Message - > >> From: Matt Jenkins > >> To: WISPA General List > >> Sent: Wednesday, September 29, 2010 3:56 PM > >> Subject: Re: [WISPA] 11GHz fade margin > >> > >> > >> Why Exalt over Dragonwave or SAF? > >> > >> On 09/29/2010 12:49 PM, Marco Coelho wrote: > >> We're looking at the exalt ExploreAir for these links. Anyone using > >> them in 11 GHz? > >> I'd like some first hand feedback. > >> > >> Marco > >> > >> On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: > >> On Tue, Sep 28, 2010 at 11:51, Marco Coelho > wrote: > >> I'm looking at deploying some 11GHz gear. I would like to do one > >> path > >> in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > >> Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > >> fine with it. > >> > >> I have a pair of Trango Apex radios in that band, for a 22-mile > >> link. Four > >> foot antennas. One side is about 130' AGL, the other is (I think) 250'. > >> There have been some thermal ducting issues over the last few months - > at > >> least I assume it's thermal ducting. Occasionally, for a minute or two > >> the > >> link will lose 15-20 points of SNR, and that often pushes the error rate > >> high enough that the radios temporarily lose modem lock. Almost always > >> happens just before or after dawn (give or take an hour). It usually > >> fixes > >> itself within a minute or two, fortunately. Probably qualifies for > >> four-nines reliability
Re: [WISPA] 11GHz fade margin
Are you using the adaptive modulation feature? Scott Carullo Technical Operations 877-804-3001 x102 From: "David E. Smith" Sent: Wednesday, September 29, 2010 3:01 PM To: "WISPA General List" Subject: Re: [WISPA] 11GHz fade margin On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: I'm looking at deploying some 11GHz gear. I would like to do one path in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be fine with it. I have a pair of Trango Apex radios in that band, for a 22-mile link. Four foot antennas. One side is about 130' AGL, the other is (I think) 250'. There have been some thermal ducting issues over the last few months - at least I assume it's thermal ducting. Occasionally, for a minute or two the link will lose 15-20 points of SNR, and that often pushes the error rate high enough that the radios temporarily lose modem lock. Almost always happens just before or after dawn (give or take an hour). It usually fixes itself within a minute or two, fortunately. Probably qualifies for four-nines reliability, which is "good enough" for my purposes. David Smith MVN.net 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] 11GHz fade margin
Whats the SAF lumina cost with say 2ft dishes for a 1 mile link? Scott Carullo Technical Operations 877-804-3001 x102 From: "Patrick Cole" Sent: Wednesday, September 29, 2010 6:55 PM To: "WISPA General List" Subject: Re: [WISPA] 11GHz fade margin Thought I would chime in since I'm using the SAF lumina in my network: The standard Lumina at 11GHz does up to +12 dBm at 256QAM and +19 dBm at QPSK.SAF designed this radio specifically for lower power applications (solar etc). and has a typical power consumption around 25W per unit. They have a high power model that does +25 at QPSK and +17 at 256 QAM at 11GHz. Pat Wed, Sep 29, 2010 at 06:18:28PM -0400, Tom DeReggi wrote: > > Why Exalt over Dragonwave or SAF? > > I cant answer for Exalt, as not familiar with the product but can answer regarding SAF > > SAF is a great radio. Its affordable, and a nice package available from distribution. But > > I believe the SAF radio has significantly lower TX power. I dont remember exactly but think it was around 13-15db. > My point is that its considerably less TX power than Trango standard or Dragonwave HP versions. > > So the SAF is not as good a choice for longer range links that are pushing the distance specs. > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > - Original Message - > From: Matt Jenkins > To: WISPA General List > Sent: Wednesday, September 29, 2010 3:56 PM > Subject: Re: [WISPA] 11GHz fade margin > > > Why Exalt over Dragonwave or SAF? > > On 09/29/2010 12:49 PM, Marco Coelho wrote: > We're looking at the exalt ExploreAir for these links. Anyone using > them in 11 GHz? > I'd like some first hand feedback. > > Marco > > On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: > On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: > I'm looking at deploying some 11GHz gear. I would like to do one path > in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > fine with it. > > I have a pair of Trango Apex radios in that band, for a 22-mile link. Four > foot antennas. One side is about 130' AGL, the other is (I think) 250'. > There have been some thermal ducting issues over the last few months - at > least I assume it's thermal ducting. Occasionally, for a minute or two the > link will lose 15-20 points of SNR, and that often pushes the error rate > high enough that the radios temporarily lose modem lock. Almost always > happens just before or after dawn (give or take an hour). It usually fixes > itself within a minute or two, fortunately. Probably qualifies for > four-nines reliability, which is "good enough" for my purposes. > David Smith > MVN.net > > > > 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/ 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] 11GHz fade margin
Scott, Hit me offlist if your interested in a quote, we are a disti Gino A. Villarini g...@aeronetpr.com <mailto:g...@aeronetpr.com> Aeronet Wireless Broadband Corp. 787.273.4143 From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Scott Carullo Sent: Friday, October 01, 2010 1:32 AM To: WISPA General List Subject: Re: [WISPA] 11GHz fade margin Whats the SAF lumina cost with say 2ft dishes for a 1 mile link? Scott Carullo Technical Operations 877-804-3001 x102 <http://www.flhsi.com/files/emaillogo.jpg> From: "Patrick Cole" Sent: Wednesday, September 29, 2010 6:55 PM To: "WISPA General List" Subject: Re: [WISPA] 11GHz fade margin Thought I would chime in since I'm using the SAF lumina in my network: The standard Lumina at 11GHz does up to +12 dBm at 256QAM and +19 dBm at QPSK. SAF designed this radio specifically for lower power applications (solar etc). and has a typical power consumption around 25W per unit. They have a high power model that does +25 at QPSK and +17 at 256 QAM at 11GHz. Pat Wed, Sep 29, 2010 at 06:18:28PM -0400, Tom DeReggi wrote: > > Why Exalt over Dragonwave or SAF? > > I cant answer for Exalt, as not familiar with the product but can answer regarding SAF > > SAF is a great radio. Its affordable, and a nice package available from distribution. But > > I believe the SAF radio has significantly lower TX power. I dont remember exactly but think it was around 13-15db. > My point is that its considerably less TX power than Trango standard or Dragonwave HP versions. > > So the SAF is not as good a choice for longer range links that are pushing the distance specs. > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > - Original Message - > From: Matt Jenkins > To: WISPA General List > Sent: Wednesday, September 29, 2010 3:56 PM > Subject: Re: [WISPA] 11GHz fade margin > > > Why Exalt over Dragonwave or SAF? > > On 09/29/2010 12:49 PM, Marco Coelho wrote: > We're looking at the exalt ExploreAir for these links. Anyone using > them in 11 GHz? > I'd like some first hand feedback. > > Marco > > On Wed, Sep 29, 2010 at 2:02 PM, David E. Smith wrote: > On Tue, Sep 28, 2010 at 11:51, Marco Coelho wrote: > I'm looking at deploying some 11GHz gear. I would like to do one path > in two 27 Mile Hops. Using 6' dishes I show a fade margin of 19db. > Is this adequate for 11GHz at that rage? At 5GHz - 6GHz, I would be > fine with it. > > I have a pair of Trango Apex radios in that band, for a 22-mile link. Four > foot antennas. One side is about 130' AGL, the other is (I think) 250'. > There have been some thermal ducting issues over the last few months - at > least I assume it's thermal ducting. Occasionally, for a minute or two the > link will lose 15-20 points of SNR, and that often pushes the error rate > high enough that the radios temporarily lose modem lock. Almost always > happens just before or after dawn (give or take an hour). It usually fixes > itself within a minute or two, fortunately. Probably qualifies for > four-nines reliability, which is "good enough" for my purposes. > David Smith > MVN.net > > > > 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/ -
