RE: [WISPA] omni tower separation

2006-02-17 Thread Paul Hendry
Is this all just omni's (i.e signal is bouncing of the structure straight
back at the omni causing noise) and what's the preferred for 5.8GHz? Don't
use omni's myself but it always handy to know just in case ;)

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Mac Dearman
Sent: 17 February 2006 04:42
To: WISPA General List
Subject: Re: [WISPA] omni tower separation

I to can kick in some experience here! I mounted an omni one time on top of 
a building on a tripod. I shoved the Omni as high as I could reach to push 
it up(hehehehe not to high) on the mast and tightened it down. The omni was 
not as tall as the mast and was mounted about 3 off the mast.  I checked it

out about a week later and noticed that it always had 900kbps of traffic on 
the wireless interface even though there was no ethernet traffic (mrtg 
graphs via SNMP) and it really puzzeled me. After stewing over it I decided 
it was either a bad radio card or that stinking mast beside the omni - - it 
was the mast :-)

 Moral of the story = get some distance from whatever is close!

Mac Dearman
Maximum Access, LLC
www.inetsouth.com
www.radioresponse.org

- Original Message - 
From: Tom DeReggi [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Thursday, February 16, 2006 8:42 PM
Subject: Re: [WISPA] omni tower separation


I can tell you from experience, mounting it at 6 inches is not a good idea.

We did that once, in a rush job, when the climbers were there and mounting 
hardware was not. Definate holes in coverage were identified after the 
fact.

 The answer of how far from the tower, is also a factor of how big your 
 tower is, and of what kind.

 I recommend 18-24. As for Rick's suggestion of 36, never tried it, so 
 don't know, but I see no reason not to take his word for it.

 Tom DeReggi
 RapidDSL  Wireless, Inc
 IntAirNet- Fixed Wireless Broadband


 - Original Message - 
 From: Rick Smith [EMAIL PROTECTED]
 To: WISPA General List wireless@wispa.org
 Sent: Thursday, February 16, 2006 7:47 PM
 Subject: Re: [WISPA] omni tower separation



 actually, at 900 mhz, 36 is preferred.

 On one tower, with trango, using an OD9-11 (11 dbi vert omni), I saw 8-10

 db improvements in my customer connections that were NLOS when I moved 
 the antenna out from 24 to 36


 Marlon K. Schafer wrote:

 I've always been taught that 18 is the minimum.
 marlon

 - Original Message -
 *From:* Kurt Fankhauser mailto:[EMAIL PROTECTED]
 *To:* wireless@wispa.org mailto:wireless@wispa.org
 *Sent:* Thursday, February 16, 2006 10:12 AM
 *Subject:* [WISPA] omni tower separation

 Is 6 inches enough separation with a 9db omni from a 25g tower?,
 I’ve done it with 12 before and I had no problems, just wondering
 what 6 would do.

 Kurt Fankhauser

 WAVELINC

 114 S. Walnut St.

 Bucyrus, OH 44820

 419-562-6405

 www.wavelinc.com http://www.wavelinc.com



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Re: [WISPA] omni tower separation

2006-02-16 Thread Marlon K. Schafer



I've always been taught that 18" is the 
minimum.
marlon


  - Original Message - 
  From: 
  Kurt 
  Fankhauser 
  To: wireless@wispa.org 
  Sent: Thursday, February 16, 2006 10:12 
  AM
  Subject: [WISPA] omni tower 
  separation
  
  
  Is 6 inches enough separation with 
  a 9db omni from a 25g tower?, I’ve done it with 12 before and I had no 
  problems, just wondering what 6 would do.
  
  Kurt 
  Fankhauser
  WAVELINC
  114 S. Walnut 
  St.
  Bucyrus, 
  OH 
  44820
  419-562-6405
  www.wavelinc.com
  
  
  

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Re: [WISPA] omni tower separation

2006-02-16 Thread Rick Smith


actually, at 900 mhz, 36 is preferred.

On one tower, with trango, using an OD9-11 (11 dbi vert omni), I saw 
8-10 db improvements in my customer connections that were NLOS when I 
moved the antenna out from 24 to 36



Marlon K. Schafer wrote:


I've always been taught that 18 is the minimum.
marlon

- Original Message -
*From:* Kurt Fankhauser mailto:[EMAIL PROTECTED]
*To:* wireless@wispa.org mailto:wireless@wispa.org
*Sent:* Thursday, February 16, 2006 10:12 AM
*Subject:* [WISPA] omni tower separation

Is 6 inches enough separation with a 9db omni from a 25g tower?,
I’ve done it with 12 before and I had no problems, just wondering
what 6 would do.

Kurt Fankhauser

WAVELINC

114 S. Walnut St.

Bucyrus, OH 44820

419-562-6405

www.wavelinc.com http://www.wavelinc.com


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Re: [WISPA] omni tower separation

2006-02-16 Thread Tom DeReggi
I can tell you from experience, mounting it at 6 inches is not a good idea. 
We did that once, in a rush job, when the climbers were there and mounting 
hardware was not. Definate holes in coverage were identified after the fact.


The answer of how far from the tower, is also a factor of how big your tower 
is, and of what kind.


I recommend 18-24. As for Rick's suggestion of 36, never tried it, so 
don't know, but I see no reason not to take his word for it.


Tom DeReggi
RapidDSL  Wireless, Inc
IntAirNet- Fixed Wireless Broadband


- Original Message - 
From: Rick Smith [EMAIL PROTECTED]

To: WISPA General List wireless@wispa.org
Sent: Thursday, February 16, 2006 7:47 PM
Subject: Re: [WISPA] omni tower separation




actually, at 900 mhz, 36 is preferred.

On one tower, with trango, using an OD9-11 (11 dbi vert omni), I saw 8-10 
db improvements in my customer connections that were NLOS when I moved the 
antenna out from 24 to 36



Marlon K. Schafer wrote:


I've always been taught that 18 is the minimum.
marlon

- Original Message -
*From:* Kurt Fankhauser mailto:[EMAIL PROTECTED]
*To:* wireless@wispa.org mailto:wireless@wispa.org
*Sent:* Thursday, February 16, 2006 10:12 AM
*Subject:* [WISPA] omni tower separation

Is 6 inches enough separation with a 9db omni from a 25g tower?,
I’ve done it with 12 before and I had no problems, just wondering
what 6 would do.

Kurt Fankhauser

WAVELINC

114 S. Walnut St.

Bucyrus, OH 44820

419-562-6405

www.wavelinc.com http://www.wavelinc.com


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Re: [WISPA] omni tower separation

2006-02-16 Thread JohnnyO




Take my word also - We fought our 900mhz links for weeks until we moved 36inches away from the tower - even at 30inches you'll be kickin yerself in the arse. 

For 2.4ghz - I've seen issues with anything less then 18inches of seperation from a tower.

JohnnyO

On Thu, 2006-02-16 at 21:42 -0500, Tom DeReggi wrote:


I can tell you from experience, mounting it at 6 inches is not a good idea. 
We did that once, in a rush job, when the climbers were there and mounting 
hardware was not. Definate holes in coverage were identified after the fact.

The answer of how far from the tower, is also a factor of how big your tower 
is, and of what kind.

I recommend 18-24. As for Rick's suggestion of 36, never tried it, so 
don't know, but I see no reason not to take his word for it.

Tom DeReggi
RapidDSL  Wireless, Inc
IntAirNet- Fixed Wireless Broadband


- Original Message - 
From: Rick Smith [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Thursday, February 16, 2006 7:47 PM
Subject: Re: [WISPA] omni tower separation



 actually, at 900 mhz, 36 is preferred.

 On one tower, with trango, using an OD9-11 (11 dbi vert omni), I saw 8-10 
 db improvements in my customer connections that were NLOS when I moved the 
 antenna out from 24 to 36


 Marlon K. Schafer wrote:

 I've always been taught that 18 is the minimum.
 marlon

 - Original Message -
 *From:* Kurt Fankhauser mailto:[EMAIL PROTECTED]
 *To:* wireless@wispa.org mailto:wireless@wispa.org
 *Sent:* Thursday, February 16, 2006 10:12 AM
 *Subject:* [WISPA] omni tower separation

 Is 6 inches enough separation with a 9db omni from a 25g tower?,
 Ive done it with 12 before and I had no problems, just wondering
 what 6 would do.

 Kurt Fankhauser

 WAVELINC

 114 S. Walnut St.

 Bucyrus, OH 44820

 419-562-6405

 www.wavelinc.com http://www.wavelinc.com

 
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Re: [WISPA] omni tower separation

2006-02-16 Thread Mac Dearman
I to can kick in some experience here! I mounted an omni one time on top of 
a building on a tripod. I shoved the Omni as high as I could reach to push 
it up(hehehehe not to high) on the mast and tightened it down. The omni was 
not as tall as the mast and was mounted about 3 off the mast.  I checked it 
out about a week later and noticed that it always had 900kbps of traffic on 
the wireless interface even though there was no ethernet traffic (mrtg 
graphs via SNMP) and it really puzzeled me. After stewing over it I decided 
it was either a bad radio card or that stinking mast beside the omni - - it 
was the mast :-)


Moral of the story = get some distance from whatever is close!

Mac Dearman
Maximum Access, LLC
www.inetsouth.com
www.radioresponse.org

- Original Message - 
From: Tom DeReggi [EMAIL PROTECTED]

To: WISPA General List wireless@wispa.org
Sent: Thursday, February 16, 2006 8:42 PM
Subject: Re: [WISPA] omni tower separation


I can tell you from experience, mounting it at 6 inches is not a good idea. 
We did that once, in a rush job, when the climbers were there and mounting 
hardware was not. Definate holes in coverage were identified after the 
fact.


The answer of how far from the tower, is also a factor of how big your 
tower is, and of what kind.


I recommend 18-24. As for Rick's suggestion of 36, never tried it, so 
don't know, but I see no reason not to take his word for it.


Tom DeReggi
RapidDSL  Wireless, Inc
IntAirNet- Fixed Wireless Broadband


- Original Message - 
From: Rick Smith [EMAIL PROTECTED]

To: WISPA General List wireless@wispa.org
Sent: Thursday, February 16, 2006 7:47 PM
Subject: Re: [WISPA] omni tower separation




actually, at 900 mhz, 36 is preferred.

On one tower, with trango, using an OD9-11 (11 dbi vert omni), I saw 8-10 
db improvements in my customer connections that were NLOS when I moved 
the antenna out from 24 to 36



Marlon K. Schafer wrote:


I've always been taught that 18 is the minimum.
marlon

- Original Message -
*From:* Kurt Fankhauser mailto:[EMAIL PROTECTED]
*To:* wireless@wispa.org mailto:wireless@wispa.org
*Sent:* Thursday, February 16, 2006 10:12 AM
*Subject:* [WISPA] omni tower separation

Is 6 inches enough separation with a 9db omni from a 25g tower?,
I’ve done it with 12 before and I had no problems, just wondering
what 6 would do.

Kurt Fankhauser

WAVELINC

114 S. Walnut St.

Bucyrus, OH 44820

419-562-6405

www.wavelinc.com http://www.wavelinc.com


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