Re: [WISPA] omni upside down
Stock Cisco omnis, we were hanging them from light poles. John RickG wrote: Which antenna did you use? -RickG On Fri, Jan 29, 2010 at 6:03 PM, John Thomas jtho...@quarnet.com wrote: We have mounted omnis upside down because an omni pattern tends to radiate from the base of the antenna upward. By turning the antenna upside down, it becomes slight better at receiving and sending. That, and Cisco 1500's make it easy to do... John RickG wrote: Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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/ 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] omni upside down
We have mounted omnis upside down because an omni pattern tends to radiate from the base of the antenna upward. By turning the antenna upside down, it becomes slight better at receiving and sending. That, and Cisco 1500's make it easy to do... John RickG wrote: Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
Which antenna did you use? -RickG On Fri, Jan 29, 2010 at 6:03 PM, John Thomas jtho...@quarnet.com wrote: We have mounted omnis upside down because an omni pattern tends to radiate from the base of the antenna upward. By turning the antenna upside down, it becomes slight better at receiving and sending. That, and Cisco 1500's make it easy to do... John RickG wrote: Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
On Wed, Jan 27, 2010 at 03:55:02PM -0500, RickG wrote: While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? They could be vertically polarized dipole antennas. -- Scott LambertKC5MLE Unix SysAdmin lamb...@lambertfam.org 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] omni upside down
While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? In our landmobile/paging side we have done this for years. The antenna MUST support this feature. There is typically a drain plug on the top if it does and it must be removed in order to mount it upside down. Usually a drain hole on the bottom that is threaded and needs plugged. The reason for mounting up side down is typically just a matter of being more conveniant to mount it on the tower that way. Matt 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] omni upside down
While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
I would worry about if the antenna has any type of downtilt. That would then become uptilt. Then you have to worry about sealing it well. Most omnis have drain holes at the bottom. Justin -- Justin Wilson j...@mtin.net CCNA CCNT Mikrotik Advanced http://www.mtin.net - Homepage http://www.mtin.net/blog - Technical Blog XISP solutions Hosting Consulting Tower Climbing Web Design From: RickG rgunder...@gmail.com Reply-To: WISPA General List wireless@wispa.org Date: Wed, 27 Jan 2010 16:06:44 -0500 To: WISPA General List wireless@wispa.org Subject: Re: [WISPA] omni upside down Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
Not much, probably if you need multiple omnis you would install sectors. But if you need antenna diversity and use omnis this is one of the easier way to do it since you just need one standoff bracket. However when doing need to be wary of downtilt antennas especially for the omni tilted down and ensure you have no weep holes or similar that now end up at the top of the antenna. But with directional antennas on the client it seems base station diversity is not any greater advantage. It's good for roaming mobile users (laptops, pda, cellphones) that might not have direct LOS to the base station. On Direct LOS there is no reason to use diversity unless you are doing a mimo setup using a 2 chain radio. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 3:07 PM To: WISPA General List Subject: Re: [WISPA] omni upside down Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
In the cellular industry the antennas for this purpose are manufactured to be mounted upside down. Moisture and down tilt issues are dealt with in manufacturing. Thank You, Brian Webster -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]on Behalf Of Eje Gustafsson Sent: Wednesday, January 27, 2010 4:25 PM To: 'WISPA General List' Subject: Re: [WISPA] omni upside down Not much, probably if you need multiple omnis you would install sectors. But if you need antenna diversity and use omnis this is one of the easier way to do it since you just need one standoff bracket. However when doing need to be wary of downtilt antennas especially for the omni tilted down and ensure you have no weep holes or similar that now end up at the top of the antenna. But with directional antennas on the client it seems base station diversity is not any greater advantage. It's good for roaming mobile users (laptops, pda, cellphones) that might not have direct LOS to the base station. On Direct LOS there is no reason to use diversity unless you are doing a mimo setup using a 2 chain radio. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 3:07 PM To: WISPA General List Subject: Re: [WISPA] omni upside down Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
A couple of reasons 1. Antenna mounting space reuse. Standoffs have antennas facing up but not down. Allows the use of multiple antennas on one mount. 2. Omni antenna designs that will provide more saturation and downtilt when inverted as an omni has natural uptilt when mounted normally. You will usually find cell sites (usually old Nextel Sites) where the omni's are mounted inverted to better saturate a local area. NOTE: The antennas are specially made to be inverted. Do not try this with something off the shelf. Most omnis have vent holes to drain moisture. Invert them and you will loose this ability in most cases. -B- RickG wrote: While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
My guess was #1. Interesting enough, I have several HighGain Omni units http://www.l-com.com/productfamily.aspx?id=6414 that work really well. They dont have the drain hole on the bottom (I had one fill up with water once). At any rate, I have two water towers within a 1/10th of a mile on each side of a ridge. Each side feeds locatins that cant see the other water tank. So, both have omnis and I'm wondering if it would help to mount one of the omnis upside down and get some diversity. ? On Wed, Jan 27, 2010 at 5:30 PM, Bob Moldashel lakel...@gbcx.net wrote: A couple of reasons 1. Antenna mounting space reuse. Standoffs have antennas facing up but not down. Allows the use of multiple antennas on one mount. 2. Omni antenna designs that will provide more saturation and downtilt when inverted as an omni has natural uptilt when mounted normally. You will usually find cell sites (usually old Nextel Sites) where the omni's are mounted inverted to better saturate a local area. NOTE: The antennas are specially made to be inverted. Do not try this with something off the shelf. Most omnis have vent holes to drain moisture. Invert them and you will loose this ability in most cases. -B- RickG wrote: While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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] omni upside down
On 1/27/2010 4:06 PM, RickG wrote: Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafssone...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. on thing you could do with an upside down antenna is if your antenna is down in a valley and need uptilt that would shoot it up slightly. Leon 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] omni upside down
Our antennas aren't made for this. You'll have to get creative in finding ways to keep water out and leg condensation get out. marlon - Original Message - From: RickG rgunder...@gmail.com To: WISPA General List wireless@wispa.org Sent: Wednesday, January 27, 2010 1:06 PM Subject: Re: [WISPA] omni upside down Thanks! Is there any advantage for a WISP to do this? -RickG On Wed, Jan 27, 2010 at 4:02 PM, Eje Gustafsson e...@wisp-router.com wrote: Those are more than likely cell phone sites that have those big whip antennas going up and down (believe they are 800Mhz frequency range systems) My understanding it has one out of two reasons why they are built like that. Antenna diversion or increased base station density. Have one not too far from me that has a crown with a total of 6 omni's. 3 up and 3 down, mounted on a triangular crown. Those omnis are massive and my guess are they are at least 10-15 feet it's hard to tell because the access road is blocked and I never walked down to get close enough to compare to the tower leg joints. / Eje -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Wednesday, January 27, 2010 2:55 PM To: WISPA General List Subject: [WISPA] omni upside down While traveling around, I've noticed a few towers with omnis mounted upside down with a neighbor omni mounted right side up. Whats the purpose in this? -RickG 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/
