Archive for AirMagnet Survey

Aug
08

AirMagnet Survey Dual Card Issue?

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AirMagnet Survey Dual Card Issue?

I have started to use dual adapters with AirMagnet Pro to try and speed up performing both 2.4Ghz and 5Ghz surveys.  What this new functionality allows me to do is to associate to both radios at the same time and in principle take 50% less time on a survey.

I have noticed that on the second adapter that it seems not to like to shift back up the data rates and seems to get stuck at the lowest rate that was received at the worst part of the survey.  If you take a look at the image below you will see that I have a perfect signal on the 2.4Ghz and also on the 5Ghz also but the  data rate is 13mbps….  I was stood directly under my survey AP for this as you can see form the signal strengths…

AirMagnet Dual Card Issue?

I was configured for a 20Mhz channel on the 2.4Ghz and 40Mhz on the 5Ghz, so I was expecting to see 300Mbps on my 5Ghz, but as you can see I was not.  No matter what i did the data rate would not move back up.  I was hoping that this was just a visual bug in the software and viewing the survey and running reports would show what should be being displayed but it still showed the same problem.

I performed a SpecAN just to check and the air was clean..

I have a spare USB adapter and tried both, note that in my survey I was using a C1060 for the 2.4Ghz and the Proxim USB for the 5GHz.  I also noticed that if i paused my survey and then restarted the data rate would also not shift back up.  The ONLY way to start a fresh and get back up my data rate was to stop my survey and start a new one. (disassociate and reasassociate to the AP).

Am hoping that this is an issue just local to me but I am going to report this to AirMagnet tomorrow and just wondered if anyone else had seen this behaviour??

Categories : Indoor Wireless
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Aug
08

Professional WLAN survey kits

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Professional WLAN survey kits

I thought that i would create a quick blog on the various WLAN survey kits that i have used over the years and talk about what i now use for a wireless survey.

I have learnt over the last several years of performing WLAN surveys is that there is no such thing as the perfect WLAN survey kit.  The reason for this is that there are so many different environments that us WLAN engineers encounter, that each kit that will inevitability fall short for one survey or another.  As all of the surveys that I perform are for organisation around Europe, whichever kit i choose, i will need to travel with it, which means that it needs to be the size and weight that a single person can handle.

Therefore I typically use 3 variations of kits which I have called, “The Lightweight”, “The Heavyweight” and “The Traveller”

(links for all of the kit i use is at the bottom of the page.)

The lightweightWLAN Survey kit

This kit will typically be used when your survey is local to you and your area is small and you already have a good understanding of your RF design before you visit site.  This kit is more for validating your pre-survey paper design in certain areas of your site.  This kit would also be used when the customer does not have any decent floor plans to give you and you are looking to get an understanding of the environment.  It consists of an Terrawave wireless survey battery pack and Cisco 3500i access point.  The mount from the 3500i screws directly onto the top of the battery pack and there is a handle for carrying the battery pack around.  The battery will last about 5-6 hours which is usually enough for a single day.

The Lightweight Kit

The Lightweight Kit

Terrawave Battery pack
Survey Access Point (Cisco 3500i)
Survey Laptop with basic survey tools
Laptop with spectrum analysis tool
AirMagnet AirCheck

The heavyweightWireless Survey Kit

This kit would include as much as possible giving you all of the options that you may need on the day.

WLAN Survey Kit
WLAN Survey Kit

 

Survey Stand

Terrawave Battery pack
3 X Survey Access Points (Cisco 3500i, Cisco 3500e and Cisco 1042)
Various Antennas
Survey Laptop with AirMagnet Pro
Spectrum Analysis tool
AP Tripod (Reaches 3 meters max)
Camera ( for AP locations )
Distance measuring tool
Laptop harness
AirMagnet AirCheck
Cisco 7925 WiFi Phone
2  Spare Batteries for Laptop
Cisco PoE Injector (Should Battery Pack fail)

The Travellerwireless survey kit

The traveller kit will need to be compact and light and all fit into one box as taking several cases will increase the cost and possibly not make the trip cost effective.  I perform a lot of surveys that require extensive travel and have found the following kit to work well.  Its basically the same as my heavyweight kit but with a few items left out.  When traveling I try to keep this kit under 30Kg (including the box), and at the moment the kit is about 25Kg.

Traveling Survey Kit

Peli Case
Terrawave Battery pack
2 X Survey Access Points (Cisco 3500i, Cisco 3500e)
Various Antennas
Survey Laptop with AirMagnet Pro
Spectrum analysis tool ( I use Cisco Spectrum Expert 4 )
AP Tripod (Reaches 3 meters max)
Camera ( for AP locations ) – ( Sony DS-t70 )
Leica Distance measuring tool
Laptop harness (I use connect-a-desk)

 

Links for the various wireless survey kits.

Peli Case (Peli Cases http://www.peliproducts.co.uk )
Terrawave Battery pack – ( http://www.terra-wave.com/shop/80211n-mimo-site-survey-battery-pack-p-1535.html )
2 X Survey Access Points (Cisco 3500i, Cisco 3500e) ( www.Cisco.com )
Various Antennas (Cisco)
Survey Laptop with AirMagnet Pro ( www.airmagnet.com )
Spectrum analysis tool ( I use Cisco Spectrum Expert 4 ) ( http://www.cisco.com/en/US/products/ps9393/index.html )
AP Tripod (Reaches 3 meters max)
Camera ( for AP locations ) – ( Sony DS-t70 )
Leica Distance measuring tool – ( http://www.leica-geosystems.co.uk/en/Leica-DISTO-D3a_81046.htm )
Laptop harness (I use connect-a-desk) ( http://www.connect-a-desk.com )
AirMagnet AirCheck ( http://www.flukenetworks.com/enterprise-network/network-testing/AirCheck-Wi-Fi-Tester )

The camera that i use is a specific Sony version that allows you to draw on the image after you have taken it.  This allows me to draw an arrow to the exact location that I want the access point to be located so that when I get back to the office I don’t have to remember each access point location.  The picture below shows how i have added an arrow to show where i wanted the access point to be from my wireless survey.

Camera Editing

If you have any questions about my wireless survey kits pelase do not hesitate to message me on @MarkJulier

Thanks

Mark…

 

 

Categories : Indoor Wireless
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May
17

Warehouse Wireless Survey

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Well today was all about revisting a client that we initialy brought on board just over a year ago. This particular client had suffered some major issues with their current warehouse system and was looking for help to get productivity back up and running again.

Their current system was of the single channel architecture type which had failed badly on them after they started to use it more agressively and filled their warehouse with more stock. My job on the day was simple, get them up and running so that we can scan some product and get stock moving again. (No stock scanning, no stock moving… no money being made… simple)

The client made their own choice for WLAN vendor hardware with their choice not one that i was initally comfortable with. But i guess that whatever the manufacturer is as long as the network is surveyed and designed correctly we would be fine.

My latest visit was just to confirm the design that i had put together over a year ago. I find that customers allways like some form of “proof” so i find it very easy to use AirMagnet Survey Pro ( www.airmagnet.com ) and run them a few reports showing them coverage per AP.

As it was coverage was good which was a relief as i didnt hold out for much with the AP choice…

Thanks

Mark…

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