jdmarti1
Jack
join:2004-06-15
Oilton, OK
| Interference
Wi-Spy Trace |
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»magicwisp.com |
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ghmorris9
join:2006-05-14
Minden, ON | There are still some T-1 Wmux Lynx radios around at cell sites. If they fire up one, this will guarnteed flatten any connectivity you have along the path of the Lynx.
George |
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rawgerz
In Debt we trust
Premium
join:2004-10-03
Grove City, PA
 ·Verizon Online DSL
 ·Sprint Mobile Broa..
| reply to jdmarti1
Is the red the noise floor? Wow..
I would think the FCC would call the cell phone tower unacceptable.
You might want to migrate to 900Mhz if more customers keep dropping
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"Hows your French toast?" "Smelly and ungrateful, but this AMERICAN toast is great!" |
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slipstream1
Premium
join:2005-11-15
Jacksonville, TX
| reply to jdmarti1
Most of the cellular companies will work with you. They stand to lose alot of money if they lose the T-1 backhaul they are running on the backhaul. Call them and ask to talk to the network operations manager for that area or try to find one of the cell techs. |
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some-guy
@12.160.x.x | reply to jdmarti1
Your problem child is operating on channel 12. That is illegal in the USA.
Check the graph. He is at 100% in channel 12.
 |
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jdmarti1
Jack
join:2004-06-15
Oilton, OK
| Ch 12? The offender looks to be centered closer to somewhere between 10 and 11 - but as we all know wi-fi channels overlap. I will say though that the offender cuts a very wide swath. I am wondering why I can't see my tower on ch 1. Somebody will have to back up my conclusion on this - but I am assuming that the power is so broad and intense (and seen as noise) that it is overpowering the front end of the DLB-2300. I am wondering if a filter to block everything except ch 1 would solve my problem (at least let me get this customer back up on another tower).
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»magicwisp.com |
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Diddy1
join:2003-07-19
Sidney, NE | There is one of these radios on a cell tower about 10 miles from me. I can't anything unless I'm right next to it.
Aaron |
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ghmorris9
join:2006-05-14
Minden, ON
| reply to jdmarti1
Looks like a single-T1 Lynx PtP link running the B2 channel plan. One watt output and -94 receive sensitivity. Its a full duplex unit that makes continuous noise independant of data load. Will completely shut down our kind of equipment.
See page 5:
»www.pulsewan.com/wireless/glenay···x_t1.pdf
George |
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No Man
@12.160.x.x
| reply to jdmarti1
Ok;
Jack...
Your interferer is using channel 12 as if it were a legal channel in the USA. His signal on Channel 12 is as strong as it is on Channel 11...
That is illegal...
Mark it down.
Take it to the bank.
-m- |
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rawgerz
In Debt we trust
Premium
join:2004-10-03
Grove City, PA
·Verizon Online DSL
·Sprint Mobile Broa..
1 edit | reply to jdmarti1
said by jdmarti1  :I took this with the Wi-spy attached to my car antenna Wi-Spy Spectrum Analyzer: Cons: Doesn't read 5 GHz band, no external antenna support
Did you solder it on?
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"Hows your French toast?" "Smelly and ungrateful, but this AMERICAN toast is great!" |
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Diddy1
join:2003-07-19
Sidney, NE
| reply to jdmarti1
Somebody awhile back, here, posted a similar issue with a cell provider. They wouldn't cooperate witht the band requirements etc. The individual suggested to just fire away on the frequency to get them to take notice and correct whatever they are doing "against the rules". Can't find the post 
Aaron |
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public
join:2002-01-19
Santa Clara, CA
·DSL EXTREME
| reply to No Man
said by No Man :
Ok;
Jack...
Your interferer is using channel 12 as if it were a legal channel in the USA. His signal on Channel 12 is as strong as it is on Channel 11...
That is illegal...
Mark it down.
Take it to the bank.
-m-
Well no. The device is on channel 11.
Each 802.11 device uses 5 channels.
You could install a bandpass filter centered in ch5 at the CPE to block the interfering signal. |
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jdmarti1
Jack
join:2004-06-15
Oilton, OK
| said by public :Well no. The device is on channel 11. Each 802.11 device uses 5 channels. You could install a bandpass filter centered in ch5 at the CPE to block the interfering signal. That is what I was thinking - and wondering about the bandpass filter.
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»magicwisp.com |
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IntraLink
Premium,MVM
join:2002-08-14
Utah Valley
| reply to jdmarti1
That's got to be one of those old Western Multiplex radios.
They will crush you for sure.
We had this happen only it was a radio station. We didn't know it at the time because it was unmarked. So we unplugged the offending radio by unscrewing their N connector.
Yeah, they were pissed and threatedened legal action. Then we told them WE would threaten legal action and eventually came to an agreement. They shut down their stuff and used something else.
Most Cell carriers will work with you as the guys who implement the links usually have several options. They could just as easily have a 6GHz link in a shed somewhere they could deploy. Stupid of them to use 2.4GHz anymore anyways. |
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cybersank
join:2006-01-15
Somerville, MA
| reply to jdmarti1
Hey, I had a situation just like yours a while ago!
I can't remember exactly what it was called but I know it takes a bunch of channels on 2.4 for a 1/4 E1.
I contacted them directly and they kindly changed the polarity of their antennas. You should do the same! |
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polk5
join:2001-12-29
New Orleans, LA
1 edit | The cell co has access and the money to use licensed freq. They will not though if they do not have to. After Katrina we took them down with some proxim tsunami radios constantly. Not on purpose of course.  The tech was pulling his hair out for a week. Finally after talking with them a few times they gave up and went licensed at least where our most important links were. We are working with them on the ones that are still up for the most part. I was told that they even tried reflashing their radios to get the most power out of them. Way over legal limits. They couldnt hang with the proxim tsunami though. These bad boys are like cork screws.  |
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public
join:2002-01-19
Santa Clara, CA
·DSL EXTREME
| reply to jdmarti1
said by jdmarti1 :said by public :Well no. The device is on channel 11. Each 802.11 device uses 5 channels. You could install a bandpass filter centered in ch5 at the CPE to block the interfering signal. That is what I was thinking - and wondering about the bandpass filter. Try something like this:
»www.rflinx.com/products/filters/2400/bpf/
about $150 |
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slipstream1
Premium
join:2005-11-15
Jacksonville, TX
| reply to jdmarti1
True, the cellular companies have the resources and spare parts to do 6 gig links everywhere, but the problem is they have to file for that license on a site specific basis. That is the reason the cell companies use 2.4 gig for a stop gap measure until a license comes through or someone raises hell about the link polluting the spectrum. Find the cell company and speak to the tech and the Network Operations Manager. They will take care of it. |
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jdmarti1
Jack
join:2004-06-15
Oilton, OK
| Has anybody used these?
»hyperlinktech.com/web/bpf24-4xx.php
If I want to use one the filters out everything except CH 1 - which one do I use? Reading the spec sheet - I assume BPF24-401, but I want to not screw this up. The customer that is affected came to us from another WISP that was very unreliable (their words not mine). So far they have been great - and I call them daily with updates and information. I want this to work.
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»magicwisp.com |
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public
join:2002-01-19
Santa Clara, CA
·DSL EXTREME
1 edit | said by jdmarti1 :Has anybody used these? » hyperlinktech.com/web/bpf24-4xx.phpIf I want to use one the filters out everything except CH 1 - which one do I use? Reading the spec sheet - I assume BPF24-401, Each filter passes 5 channels centered on the specified channel. If your AP is on ch1, then BPF24-401 or BPF24-801 is the correct filter to use.
The other vendor RF Linx uses 8 pole filters rather than 4 poles. These have steeper rejection of adjacent bands. |
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