AP /w High-Gain antenna

Experts,
I got a customer's reqeust about 1262E /w special Ant which is high-gain than traditional Ant (dipole 2-3dB).
They think this would improve of its coverage area.
But, once upon the time, I used to test 1252E with high-gain directional Ant myself. Testing result shown us. There is no improvement on coverage range that traditional dipole.
Right now, how would u suggest me please.
Nipat.p
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When using a higher gain antenna, your beam width is narrower the higher you go. The distance coverage is increased on the same height as the antenna, but decreases above and below. So if you test while the AP is maybe sitting on your desk when compared to maybe a warehouse 40' ceiling, there is a difference. The higher you mount the antenna, the less coverage you will get below on ground level. Now one thing you also have to understand it that you need to try to match the lowest clients EIRP. If you increase the gain of the antenna and the power is also set at max or 100mW, the client might hear the AP real good, but the clients data might not get revived by the AP (the ap will not hear the client as good especially since most client devices have 0-2dbi gain antennas).
The best way to provide better coverage is additional APs.
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Similar Messages

WRT300N and Hi Gain Antennas

Can I attach a high gain antenna to my WRT300n? I get very weak signals when not in the same room as the router and I have read that range extenders (WRE54G) don't work with N but that hi gain antennas will increase signal strength? True? What products should I use and are there instructions available on replacing the existing antennae(s). Thanks

Thanks for the response! I have not been able to figure out how to detach the antennas. I believe another site I saw at Linksys said they weren't detachable but I am happy to try.

LOW Gain Antenna for WRT54G

Does anyone know if they make a low gain antenna for a WRT54G wireless router?
I have used the wireless router for over a year with any problems. Suddenly the wireless quit. Bought a new WRT54G but had the same problem. Hardwired connection works fine. Discovered that a nieghbor got a wireless system. Tried all 11 channels but wireless still quits working when it sees the other network. Tried 3 different laptops so I know its not the PC card. Want to try a lower gain antenna so my router doesn't see the neighbors.

What is the version of your WRT54G? It is unlikely that a weaker signal from your router will help your problem.
A more likely explanation for your problem is that the wireless adapter in your computer is getting "drowned" by your neighbor's signal. A high gain antenna on your router would help your router to overcome the effects from your neighbors.
There are several other things you can do to try to improve your wireless connection:
First of all, give your network a unique SSID. Do not use "linksys". If you are using "linksys" you may be trying to connect to your neighbor's router. Also set "SSID Broadcast" to "enabled". This will help your computer find and lock on to your router's signal.
Poor wireless connections are often caused by radio interference from other 2.4 GHz devices. This includes wireless phones, wireless baby monitors, microwave ovens, wireless mice and keyboards, wireless speakers, and your neighbor's wireless network. In rare cases, Bluetooth devices can interfere. Even some 5+ GHz phones also use the 2.4 Ghz band. Unplug these devices, and see if that corrects your problem.
In your router, try a different channel. There are 11 channels in the 2.4 GHz band. Usually channel 1, 6, or 11 works best. Check out your neighbors, and see what channel they are using. Because the channels overlap one another, try to stay at least +5 or -5 channels from your strongest neighbors. For example, if you have a strong neighbor on channel 9, try any channel 1 through 4.
Also, try to locate the router about 4 to 6 feet above the floor, in an open area. Do not locate it behind your monitor or near other computer equipment or speakers. The antenna should be vertical.
Also, in the computer, go to your wireless software, and go to "Preferred Networks" (sometimes called "Profiles" ). There are probably a few networks listed. Delete any network named "linksys". Also delete any network that you do not recognize, or that you no longer use. If your current network is not listed, enter its info (SSID, encryption (if any), and key (if any) ). Then select your current network and make it your default network, and set it to automatic login. You may need to go to "settings" to do this, or you may need to right click on your network and select "Properties" or "settings".
If the above does not fix your problem, download and install the latest driver for your wireless card.
If you still have trouble, download and install the latest firmware for your router. After a firmware upgrade, you must reset the router to factory defaults, then setup the router again from scratch. If you saved a router configuration file, DO NOT use it.
Hope this helps.

Looking for a high gain portable digital antenna for HP Pavilion DV7

Hi guys,
I bought a PAVILION DV7-3160 eh laptop this year. It has DVB-T MPEG-4 digital HDTV tuner originally made by Avermedia.
There is a problem that the digital signal is very poor at my living place. (It will be reduced until turning analog signal down finally. It will happen only 2 years later but I do not want to wait 2 years to watch digital TV channels.)
I have decided to plug a third party digital antenna to my laptop instead of the brand HP antenna.
I have founded in the Ebay a lot of digital (active and passive) arials but I don’t know what types are the best to my HP.
I’m helpless as the user manual tell nothing about technical details of TV tuner and it’s antennas.
I give preference to the high gain active antennas with built-in amplifier but these arials good for DVB-T USB stick and its are required 5V or more voltage. There are two types of arials, one is 50 ohm and the other is 75 ohm. (I have a conversion cable on the end a connector which is fit to my laptop (50 OMH) and on the other end a coax cable female connector(75 OMH) This two types is a little bit annoying.)
What are your opinions about this active type of antennas? Are these antennas compatible with my DV7?
Can provide DV7’s antenna connector the needed power to gain signal or the passive types are only suitable for my notebook? And what type would be better 50 or 75 OMH?
I would be glad if you answer my questions suggested me some useful portable antennas what are you using to your HP laptops.
Thanks in advance.
Julio

jacksoneric,
Could you explain what have you wanted to tell me with this link?
I have clicked on it but I could not find any information on the subject. Thanks.

External Directional Antenna /w High gain (6dbi) ?!?!?!?!

Hi Experts,
My assumption is using External antenna for AP like 3500E/3600E series with antenna such AIR-ANT2566P4W-R= (directional) can make me cover more longer distance but narrow beam. This can make client Rx (receive) and correct data.
But could client Tx (transmit) back to AP /w correct data /w no huge TCP retransmission ?!?!?!?!
Any idea please share, Thanks.
Nipat.p

Well, what you need to look at is the antenna on the client device. Just because the signal from the AP can be heard from the client, the signal from the client might not reach the ap. Don't use antenna gain to increase coverage for clients.
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What happens when Ap has two different gain antennas

Hi all..
I have two question?
In a Warehouse, I have a high density of Access Point 1240, each AP have only the radio b/g active and each AP has two antennas. One antenna is 2.2 dBi and the other antenna is 5.2 dBi. This affect to the signal, or throughput?
The Ap is at around 82 feet high, is out of estandar. What happens if I reduce the transmit power?.Can the wifi client connect to the ap and work fine?
Thanks for your help

#Two differrent gain or antenna type(with or without RF overlap) works good for one client, when more than one client communicating to different antenna would yield poor performance. see the link below.
#dtpc and datarate would also drastically change based on the client connected antenna that is not discussed in the link.
#With one antenna there won't be diversity and yes there will be a performance hit when compared to having multiple antennas.
#Either use two similar model or one antenna, If you don't have two similar antenna model you can still connect one antenna and on AP's antenna diversity setting you can have either left or rigtht based on the antenna connected to the radio port on AP.
Multipath and Diversity
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a008019f646.shtml

De-graining footage shot with high gain

I am trying to de-grain some footage that was shot with the gain inadvertently set to medium or high. The footage is a lock-down shot of a person speaking on a stage. Very little movement. It was shot in HDV at 1080i60 using a decent Sony 3-chipper. Once edited, it will be compressed for delivery on SD DVD. I understand that removing grain may soften the image, and that is probably acceptable.
A couple questions:
1. Is there a good solution (a filter, perhaps) within FCS 2 that I can use to "de-grain"?
2. Is there a good solution outside FCS 2 that I can use to de-grain?
Thanks for any help.

So, if you were locked in a room with no internet access and only FCS2 on your computer (i.e. no 3rd party plug-ins), how would you try to reduce the noise? Would you superimpose a copy of the clip on V2 and apply some sort of filter/opacity trick?
I was trapped in a room once with no internet access and had video that was shot in really low light. I duplicated the clip on V2 and used the 3-way color corrector to increase the white levels and saturation on each clip. It did the trick but I still had noise.

Question about Antenna Gain

Dear Frends,
Could any one can explain me the usage of "Antenna Gain" field in Cisco WLC software v4.2 (Go to Wireless > Accesspoints> radios >802.11b/g/n Cisco APs > Configure - page in Gui)
if i'm using an 2.2Dbi cisco antenna, which value should i mention there? 2.2 or 4.4 ?
Anybody can suggest me any white paper or any documents regarding the mentioned page ?
Thanks in advance
Raj

You would use the gain of your antenna, 2.2dBi.
Just because there are two antennas does not mean the value doubles. The other antenna is for diversity purposes; in the event a signal recieved is weaker due to a host of reasons, the other antenna is exactly 180 degrees out of phase of the first antenna and would most likely be in a better position to receive the strongest signal.
With diversity on, the AP constantly determines which antenna would be the best antenna at that moment in time to recieve signals. They flip on and off all the time.
The only way to increase gain would be to use a higher gain antenna. Depending on your original intent and your surrounding environment, this does not necessarily equate to better; sometimes it equates to worse.
You type it in so the WLC knows what you stuck on the end of the radio so it can act accordingly, supposedly.

Antennas gain and RSSI

Hi,
we are using 1240 AP and now have changed antenna to 1728 (Gain 5.2dBi) to increase signal strength, but as show Wi-Fi scanner (inSSIDer)
RSSI stays the similar with old and new antennas.
What's wrong? in AP configuration I changed diversity and external antennas gain.
Valentina

Hi, I have captured with inSSIDer and Xirrus: both programs show similar results (pictures are attached). Signal strength was measured from one place and it should be higher with higher gain antenna (distance is about 1 m in these pictures, but similar results with longer distance). Should we some addtional configurations in AP - and where if yes?
(the highest blue line in both pictures with dipole and then 1728)
Valentina

Verizon's new FiOS GigE Wireless N Router and High Speed Internet

So I got a deal in the mail to get an upgrade to [50/25] Mbps Internet (I currently have [15/5]...when I was reviewing it on line this message came up...
Verizon will provide up to [50/25] Mbps Internet with a wired connection. If you use your Internet primarily for wireless or WiFi connections, you have the option to upgrade to Verizon's new FiOS GigE Wireless N Router which will maximize your speed delivered through your wireless connection.
Upon completion of your order, you'll be provided with information for purchasing a router at Verizon's online equipment and accessories store.
I am VERY interested in getting super fast internet...my current internet is really good but it wouldnt hurt to bump it up. I have several devices using internet in the home...most of them wireless (including my PS3). I currently use a Verizon Actiontec router.
So here is my question...do I really need to get the above router to take advantage of that [50/25]? Also one other thing...My house is fairly large and I would really like to have two routers...is it possible to use two routers or a setup to have one upstairs and another downstairs?
Thanks in advance for the answers!
-Jest

There are a lot of variables that affect wireless range.
Walls, interference, other networks in the area, etc.
You don't indicate which older Actiontec you have.
Wireless capabilities also vary by Actiontec hardware revision (A,C,D,E,F,G,I).
In general, wireless range for 802.11n is somewhat less than 802.11g, even though the bandwidth is higher.
This is especially true on the 5Ghz band (which the latest Actiontec doesn;t support).
If you only need another 10 feet, you could try moving the router, or replacing the antenna with a high gain antenna.
http://www.meritline.com/high-gain-802n-2-4ghz-swivel-antenna-routers-network-card-adapters---p-4440...

ASK THE EXPERTS : High Density Wireless Deployments and CleanAir Technology

with
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to get an update on High Density Wireless Deployments and CleanAir technology with Cisco expert Fred Niehaus. Fred is a technical marketing engineer for the Wireless Networking Business Unit at Cisco, where he is responsible for developing and marketing enterprise wireless solutions using Cisco wireless LAN products. In addition to his participation in major deployments, Fred has served as technical editor for several Cisco Press books including the "Cisco 802.11 Wireless Networking Reference Guide" and "The Business Case for Enterprise-Class Wireless LANs." Prior to joining Cisco with the acquisition of Aironet, Fred was a support engineer for Telxon Corporation, supporting some of the very first wireless implementations for major corporate customers. Fred has been in the data communications and networking industry for more than 20 years and holds a Radio Amateur (Ham) License "N8CPI."
Remember to use the rating system to let Fred know if you have received an adequate response.
Fred might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the shortly after the event. This event lasts through June 3, 2011. Visit this forum often to view responses to your questions and the questions of other community members.

You are correct, between the higher numbers of users with multiple devices the bandwidth requirements keep increasing.
The limitation of three non-overlapping channels in the 2.4 GHz space is driving more customers to 5 GHz, it is important to have both bands when high density deployments are needed. While many older devices only support 2.4 GHz, we are now seeing far more devices with 5 GHz as well.
The recomendation of 20-25 clients and 8 voice calls on a given 2.4 GHz channel is still a good "rule of thumb" with actual customer data requirements driving those numbers higher or lower. You are right when you say "throwing Access Points" at the problem can degrade the wireless quality as co-channel interference and overall noise floor can rise with multiple Access Points that can all hear each other.
A better approach to the problem is to throw more spectrum at this issue (using 5 GHz channels) and elements of 802.11n (20 MHz) bandwidth on 2.4 GHz.
What we have been doing in high density deployments is to try to minimize the propagation of a cell and focus it in a given direction. This can be done by
1. Managing the RF power of the radios (Access Points) and in some cases the client's power (using elements of CCX).
2. Using the right antennas to shape both Tx and Rx cell size to help isolate, we have recently introduced a new high gain antenna for stadiums that does this well.
3. Limit supported rates, obviously the higher the data rate the less sensitive the receiver is and the smaller the cell size becomes.
4. Enable 5 GHz (that adds far more channels for data throughput)
5. Limit the number of SSIDs in use as each requires a separate beacon (adding to RF utilization)
6. Co-locating access points with non-overlapping channels
There are some challenges, for example; many dual -band clients prefer to connect to 2.4 GHz, and 2.4 GHz is more likely to be busier and subject to interference, so we also enable Cisco "Band-Select" which basically "nudges" those clients off 2.4 GHz and pushes them to 5 GHz so as to free up the 2.4 GHz band when we can determine the client has 5 GHz capability.
So how is this done? well, we do this by listening to the clients and if we detect that the client is sending out probe requests on both bands we know the client can use 5 GHz so we essentially make the 5 GHz band "appear more attractive" to that client.
Note: Client load balancing and Band select are features in the Cisco Unified controller menu.
Also enabling client link (intelligent beam forming) helps direct the signal directly at the client and reduces same channel interference.

Will it work with R500? Amped Wireless High Power Wireless-300N 600mW USB Adapter.

Hi all, new to this site and also to owning a laptop. Bought what I believe to be 2009 Thinkpad R500. It works well with windows 7 installed. I bought it so that I could stream music in my shop connected to my stereo. I sometimes think I should have maybe save up a little more and bought a new laptop. Paid $200 for it. Anyway I was wondering if anyone could tell if the item below will work with my laptop? My thoughts are to some time in the near future to also install an outdoor wifi antenna on my house. One thing I did notice in my shop which confused me a little was when I had my laptop and my wife's laptop down in my shop, her signal strength was around 20 mbps and mine only showed 13 mbps. Any ideas to why?
Add Long Range Wi-Fi to your Computer: Whether you're using a Mac or Windows laptop or desktop PC, the UA600 attaches to an available USB port (2 USB ports for maximum performance) on your computer and provides long range Wi-Fi connectivity for connecting to your home Wi-Fi network or a Wi-Fi hotspot.
Maximum Wi-Fi Range: The internal High Power 600mW Amplifier (12x the power of standard adapters) is optimally paired with a High Power 5dBi Wi-Fi antenna to provide maximum wireless range and performance.
Simple Setup: Setup is quick and simple: Insert the installation CD, install the software and plug in the High Power USB Adapter.
Great for Power Users: The High Power USB Adapter is designed for Wi-Fi users that demand the most from their Wi-Fi networks. The UA600 features wireless data reception speeds of up to 300Mbps for streaming video, transferring large data files and other high traffic Wi-Fi activities.
Upgradable Antenna for More Wi-Fi Range: The High Power USB Adapter features a detachable antenna that can be replaced with an indoor or outdoor high gain antenna for even more Wi-Fi range or for special installation applications.
Universal Compatibility: The High Power USB Adapter works great with all 2.4GHz 802.11b/g or n wireless routers, Wi-Fi networks and manufacturers.

Your machine as it left the factory:
P8600(2.4GHz), 2GB RAM, 160GB 5400rpm HD, 15.4in 1280x800 LCD, Intel 4500MHD, CDRW/DVDRW, Intel 802.11agn wireless, Modem, 1Gb Ethernet, UltraNav, Secure chip, Fingerprint Reader, 6c Li-Ion, WinXP Pro
I'm going to take a stab in the dak that the card is Intel 5100AGN, which *should* support both bands. That's what my own R500 came with.
Depending on the amount of $$ that you want to spend on a router, there are many possible options. I'd suggest checking out the recommendations from various broadband forums.
Good luck.
Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.

External Antenna w/new iMac

Hey Folks,
Brand new to Mac and I was wondering if there was anyway to add an external wifi antenna to my new 24" iMac?
My Modem is on the other side of the house, 2 floors up and I can't seem to find a signal.
My Dell PC right beside it has an external D-Link 7.5DB high gain antenna and it finds several access points.
Any ideas???

Can you run an ethernet cable down the cold air return and use that? You also might relocate the existing wireless router to a better location on the floor it is on. Or run a second router from the first using ethernet and extend the range of the network that way. I ran an ethernet cable through the cold air return from the 2nd floor to my basement and I have a 5 port switch and a second router acting as a wireless access point there as well. They are cheap as borscht nowadays.

Antenna Parameters

Hi
Im upgrading a WLC HW from WLC 4400 to WLC 5508 and my question is, what will happen to the ap parameters like antenna gain, antenna type that is set on the WLC under radio settings for each ap.
Is this info stored on the AP or is it on the WLC , so this wil disappear when the ap join the new WLC.
I had not planned to do a restore from the old WLC to the new one.

You will need to re-enter the external antenna configuration.
If the external antenna has similar power of the internal antenna, don't waste your time.
However, if you are using a high-gain antenna then it's worth the while to configure the power.

Cisco 1300 Series with AIR-ANT24120 external antenna

Here,
I am using Cisco 1300 Outdoor Access Point/Bridge. I connect AIR-ANT24120 omni antenna to the Right Primary connector but i'm not sure whether the AIR-ANT24120 is working or not because i find no difference in range before and after i deploy my AIR-ANT24120. Please could anyone confirm the working configure for this AIR-ANT24120 on my case. The 1300 Access Poiny/Bridge running C1310 Software Version 12.3(8) JA2.

Thanks for the advice. Things now is much clear now. i am connecting a client to the 1310. For a bridge link i can definetly associate from few kilometers away. But i was thinking that it is also possible to associate from few kilometer away using my labtop also. In orther words i am trying to connect a client to the 1310. Please if you have additional words on this, please i am really appreciate that co's i am sure it would help clarify more on this issue. Especially the limitation of clients or how far can i connect my client to the 1310, Or are there any special configuration on the 1310 plus my 12 dbi omni external antenna attach to it that would increase the range for my clients or is it only 100M-200M the maximum range for client irregardless of the external high gain antenna and all.
thanks.

AP /w High-Gain antenna

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