' wireless@wispa.org
Sent: Wednesday, April 29, 2009 8:10 AM
Subject: Re: [WISPA] Noise by me on a tower
Ethernet crystal harmonics. The crystal on Ethernet is 25MHz. So your
hitting them with the 9th harmonics. This bleeding is worst with PoE
powered
devices because it couples into the DC power
@wispa.org
Sent: Wednesday, April 29, 2009 8:10 AM
Subject: Re: [WISPA] Noise by me on a tower
Ethernet crystal harmonics. The crystal on Ethernet is 25MHz. So your
hitting them with the 9th harmonics. This bleeding is worst with PoE
powered
devices because it couples into the DC power over
' wireless@wispa.org
Sent: Wednesday, April 29, 2009 8:10 AM
Subject: Re: [WISPA] Noise by me on a tower
Ethernet crystal harmonics. The crystal on Ethernet is 25MHz. So your
hitting them with the 9th harmonics. This bleeding is worst with PoE
powered
devices because it couples into the DC power
RCWiFi Wireless Internet Service
-Original Message-
From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf
Of John Scrivner
Sent: Sunday, May 10, 2009 11:55 AM
To: WISPA General List
Subject: Re: [WISPA] Noise by me on a tower
Shielded Cat 5 and Ferrite Beads are your
Shielded Cat 5 and Ferrite Beads are your friend. I have been where
you are and this fixed it all for me.
Scriv
On Wed, Apr 29, 2009 at 10:01 AM, Steve Barnes st...@pcswin.com wrote:
I have an odd situation, I have 2-2.4 180* sectors MT RB411 and 5-5.8 StarOS
War1 backhaul radios and a RB600
Broadband
- Original Message -
From: John Scrivner j...@scrivner.com
To: WISPA General List wireless@wispa.org
Sent: Sunday, May 10, 2009 11:54 AM
Subject: Re: [WISPA] Noise by me on a tower
Shielded Cat 5 and Ferrite Beads are your friend. I have been where
you are and this fixed it all
I've seen Ethernet cause problems for the VHF radio band just like this. Try
unplugging the Ethernet and seeing if the noise is still there. You could
also try knocking it down to 10-base T. Apparently the Ethernet signal
generator has a harmonic that resembles the VHF radio band or so I was told.
Ethernet crystal harmonics. The crystal on Ethernet is 25MHz. So your
hitting them with the 9th harmonics. This bleeding is worst with PoE powered
devices because it couples into the DC power over the cat5 cabling and if
the power supply is not nice and clean it will couple into the AC system as
I've seen power supplies do things like this in the past. Get someone on
the tower to pull one at a time till you figure out which unit is the real
cause of the trouble.
I'd also ask to see the SA readings, the wave form may be of help if you can
post a pic of it.
marlon
- Original
ever have
imagined.
marlon
- Original Message -
From: Eje Gustafsson e...@wisp-router.com
To: 'WISPA General List' wireless@wispa.org
Sent: Wednesday, April 29, 2009 8:10 AM
Subject: Re: [WISPA] Noise by me on a tower
Ethernet crystal harmonics. The crystal on Ethernet is 25MHz. So
] On Behalf
Of Marlon K. Schafer
Sent: Wednesday, April 29, 2009 11:22 AM
To: WISPA General List
Subject: Re: [WISPA] Noise by me on a tower
I've seen power supplies do things like this in the past. Get someone on
the tower to pull one at a time till you figure out which unit is the real
cause
-- Original Message --
From: Kurt Fankhauser k...@wavelinc.com
Reply-To: WISPA General List wireless@wispa.org
Date: Wed, 29 Apr 2009 11:08:45 -0400
I've seen Ethernet cause problems for the VHF radio band just like this. Try
unplugging the Ethernet and
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