AP PHY Data Rate Anomaly

I did a scan using the airmagnet WiFi anaylizer and it informed me that the one of the alarms is the following AP PHY Data Rate Anomaly: APs are using data rates of 48M, 54,M which is not included in the user defined data that is allowed in the system. I checked the controller and I have both those data rates enabled?
Thanks

Thomas:
So the only problem you have is the AirMagnet alarm?
I never worked personally with AirMagnet but you better check the settings if there are defined data rates?
I think the message says the AP has 48 and 54 Mbps data rates enabled while the AirMagnet is not configured to allow those data rates.
Just an idea. hope it helps.
Amjad

Similar Messages

AP PHY data rates

Hello,
AP 1600 has PHY data rates up to 300 Mbps, and 2600 up to 450 Mbps.
With 1600 AP, if I have a client connected at 300 Mbps on the radio 5 GHz (MCS index 15, 40 Mhz) and another client connected at 130 Mbps on the radio 2.4 GHz at 130 Mbps (MCS index 15, 20 Mhz); how will the AP handle the traffic ?
Will the AP force one of the client to lower data rates, or will it drop some paquets ?
I'm a little bit confuse about the behavior in high density environment,
Thanks a lot,
Regards

Gerald,
Wi-fi is half duplex medium and data rate does not equal throughput
Here is a good guide on the issue:
http://www.speedguide.net/faq_in_q.php?qid=374
As wi-fi performance is determined by the client, AP and external factors such as interference, wi-fi overhead, distance, loss, etc. figure throughput somewhere @ 50 - 60% of data rate at best. On top of that, there will be tcp/ip overhead too.
It will always drop to the lowest common denominator. So if the switchport is only 100 mbps, that is your bottleneck for traffic that goes over it.
Use some tools like iperf or jperf to do some client-server testing between laptops to see what the actual throughput is.
If you are using MacBooks, there is a great app in the Mac App Store called WiFiPerf
Eric

Bridge Point to Point with AP 1552EU - Maximun Data Rate

Hi all, I have a question for you, and I need your help.!!!
I have two site (Central and Remote) and I did a link point to point between it. These AP are managed by a WLC 5508, the distance between this AP is 30 Mts or 98 feed, I have configured the channel width in 40Mhz in the WLC, and MCS-5 in the data rate sección of Bridge AP. I did tests flooding the link and I only can transfer 40Mbps in both directions at the same time. This ap model is 802.11n capable. So how can I increase the data rate from 40Mbps to 100 o more Mbps.?
The antennas are directional with two ports (TX/RX) and are connected in the ports 1 and 3 of AP.
I hope your response.
Thanks,

Wow. You're radios are only 100 feet apart and you have 14dBi directional panels hooked up to them? Hopefully the TX power is configured properly and is turned *way* down.
You should certainly be able to get 802.11n HT rates between two 1550s with these antennas and 2 spatial streams. You *should* be able to achieve HT MCS 15 at 40MHz with a PHY data rate of 300 Mbps. Actual Layer 3 throughput would be approaching 100Mbps, but I think you are more likely to see ~80Mbps in actuality.
Best of luck!

Max Data Rate: AGP 2x?!

Bought myself a new MSI-KT6 Delta a few weeks ago (MSI-6590), and have had no problems until now.
First up, my GeForce 4 Ti 4600 decided to suddenly die. Random characters on the screen in text mode, flickery colours and corrupt pixels everywhere. Windows wouldn't detect it properly anymore.
Bought a new Powercolor Radeon 9600 XT with VIVO today. Downloaded the new drivers, and loaded up some Battlefield, all good. Runs nice and smooth. COD, Quake 3, etc, no problems at all.
Halo, however... BAD. Even with the basic graphics settings and no Pixel-Shading, it runs at 4 frames a second, and nothing I do changes this, from lowest to highest with Pixel-Shaders 2.0. Although there's a visual difference, it's just as slow.
So I loaded up ATI control Panel and used SmartGart to enable 8x and Fast-Writes... Rebooted, lots of flickering screen, and Windows XP is now software-rendering everything (Transparent menus take 100% CPU to fade in)
Wait for SmartGart to fix my graphics again, and it's all back to 4x and no fast-write.
Loaded up SiSoft Sandra, to check the settings in there...
Mainboard: "Max Data Rate: AGP 2x"
AGP Card: "Data Transfer Modes Support: 1x, 2x"
"AGP Bus is unused or AGP card not fully AGP compatible"
Er... should this be right? BIOS wont let me select an AGP speed, it's "Auto" and I can't select it. I'm a little concerned that my Motherboard may have been damaged! I'll go get the latest Halo Patch, but it doesn't change the fact that I can't use 8x or Fast-Write.
I'm a little apprehensive about flashing my BIOS, made more difficult by the fact that I have no working floppy drive.
CPU: AMD 2600+
RAM: 2x512mb DDR 333MHz Kingston
AlphaGremlin

Well, I updated the VIA drivers, and an updated Sandra. AGP is running at 8x, and Fast-Writes are enabled! I don't know what the hell SmartGart was going on about, but it appears to slunk away and disappeared completely from the ATI control panel since the last reinstall of drivers.
So there's one problem solved... but I don't know what's up with Halo... I can set it to the lowest settings and it still runs like an elephant with three legs, even with the -useff option for Fixed Function shaders... ah well, that's a matter for another forum, eh?
Interesting note: Sandra reports my 120gb drive as 605gb... should I be trusting it?
AlphaGremlin

Data rate supported by 6533

Hello,
Can someone tell me what is the data rate supported by PCI 6533. i mean transfer the data from peripheral to the hard disk of the PC.

Hi,
Here are a couple Knowledge Bases that address this performance specification. I just posted the knowledge bases today so they might take a day or so before they are live. Hope that helps. Have a good day.
What Are The Performance Benchmarks For The High-Speed I/O - NI 653x
http://digital.ni.com/public.nsf/websearch/4FCA248D888831C386256D8900563E45?OpenDocument
PCI-6534 pattern input while streaming to disk benchmarks
http://digital.ni.com/public.nsf/websearch/E93C4BA24B0DEC0B86256BC8006AEA0A?OpenDocument
Ron
Applications Engineer
National Instruments

How to achieve high usb data rate with cRIO-9022?

Hi all,
I read the datasheet of NI-9022 and know that USB data rate can be 480Mb/s.
I want to transfer data with rate 3.6MB/s which is much slower than the spec, but the result is time out error.
I check my FPGA and RT code by save to RT disk and the result is pass. So I think my code should be correct.
Is that because the USB driver not installed into RT?
Should I install the USB driver into RT?
Or is there any other issue I haven't find?
Thanks a lot.

According to this document: Data Storage Options for CompactRIO, depending on many conditions, such as complexity of processor
requirements, USB data can be transferred off the controller at
approximately 700 KB/s.
Also, you don't need a driver to get a USB mass storage device to work on the cRIO. Have a look at this document:
Utilizing Features of the USB Port on My cRIO-901x or My cFP-22xx Controller
Not sure if these issues are causing timeout errors. What happens when you transfer data at lower speeds? Do you get timeout errors then?
Adnan Zafar
Certified LabVIEW Architect
Coleman Technologies

I have a question about Data Rates.

Hello All.
This is a bit of a noob question I'm sure. I don't think I really understand Data Rates and how it applies to Motion... therefore I'm not even sure what kind of questions to ask. I've been reading up online and thought I would ask some questions here. Thanks to all in advance.
I've never really worried about Data Rates until now. I am creating an Apple Motion piece with about 15 different video clips in it. And 1/2 of them have alpha channels.
What exactly is Data Rate? Is it the rate in which video clip data is read (in bits/second) from the Disc and placed into my screen? In Motion- is the Data Rate for video only? What if the clip has audio? If a HDD is simply a plastic disc with a dye read by "1" laser... how come my computer can pull "2" files off the disc at the same time? Is that what data transfer is all about? Is that were RAM comes into play?
I have crunched my clips as much as I can. They are short clips (10-15seconds each). I've compressed them with the Animation codec to preserve the Alpha channel and sized them proportionally smaller (320x240). This dropped their data rate significantly. I've also taken out any audio that was associated with them.
Is data rate what is slowing my system down?
The data rates are all under 2MBs. Some are as low as 230Kbs. They were MUCH higher. However, my animation still plays VERY slowly.
I'm running a 3GigRam Powerbook Pro 2.33GHz.
I store all my media on a 1TB GRaid Firewire 800 drive. However for portability I'm using a USB 2 smartdisk external drive. I think the speed is 5200rpm.
I'm guessing this all plays into the speed at which motion can function.
If I total my data rate transfer I get somewhere in the vicinity of 11MBs/second. Is that what motion needs for it to play smoothly a 11MBs/second data connection? USB 2.0 is like what 480Mbs/second. So there is no way it's going to play quickly. What if I played it from my hard drive? What is the data rate of my internal HDD?
I guess my overall question is.
#1. Is my thinking correct on all of these topics? Do my bits, bytes and megs make sense. Is my thought process correct?
#2. Barring getting a new machine or buying new hardware. What can I do to speed up this workflow? Working with 15 different video clips is bogging Motion down and becoming frustrating to work with. Even if only 3-4 of the clips are up at a time it bogs things down. Especially if I throw on a glow effect or something.
Any help is greatly appreciated.
-Fraky

Data rate DOES make a difference, but I'd say your real problem has more to do with the fact that you're working on a Powerbook. Motion's real time capabilities derive from the capability of the video card. Not the processor. Some cards do better than others, but laptops are not even recommended for running Motion.
To improve your workflow on a laptop will be limited, but there are a few things that you can try.
Make sure that thumbnails and previews are turned off.
Make sure that you are operating in Draft Mode.
Lower the display resolution to half, or quarter.
Don't expect to be getting real time playback. Treat it more like After Effects.
Compressing your clips into smaller Animations does help because it lowers the data rate, but you're still dealing with the animation codec which is a high data rate codec. Unfortunately, it sounds necessary in your case because you're dealing with alpha channels.
The data rate comes into play with your setup trying to play through your USB drive. USB drives are never recommended for editing or Motion work. Their throughput is not consistent enough for video work. a small FW drive would be better, though your real problem as I said is the Powerbook.
If you must work on the powerbook, then don't expect real-time playback. Instead, build your animation, step through it, and do RAM previews to view sections in real time.
I hope this helps.
Andy

H.264 All-Intra Data Rates Significantly Higher

Does the built-in H.264 codec encode I-frame only files differently? I am trying to determine the optimal GOP length for high bitrate exports. Image quality seems to degrade, even in the I-frames, when using key frame distances greater than one.
After performing a series of tests to characterize the Adobe H.264 encoder, I discovered that exported files are significantly larger when key frame distance equals one frame (N=1). The average video data rate for a test file rendered with the Adobe H.264 encoder is as follows:
N=1 : 2.17 bpp : 24I
N=2 : 0.66 bpp : 12I + 12P
N=3 : 0.59 bpp : 8I + 8B + 8P
Note how the data rate drops 70% (from 2.17 to 0.66 bpp) even though 50% of the I-frames still exist when N=2. By comparison, here is the video data rate when exporting with QuickTime H.264:
N=1 : 0.89 bpp : 24I
N=2 : 0.70 bpp : 12I + 12P
N=3 : 0.64 bpp : 8I + 16P
The following chart shows data rates at key frame distances from 1-48 frames for Adobe H.264, QuickTime H.264 (via Adobe), QuickTime Pro, and Expression Encoder 4 Pro. Data rates are consistent among all encoders at GOP lengths greater than one. There is an anomoly with the Adobe H.264 codec compressing all-intra files.
The observed behavior occurs in all profiles, which were tested at Levels 4.1, 4.2, 5.0, and 5.1:
Image quality is better in the Adobe H.264 all-intraframe file, especially with respect to detail retention. The pictures below show sections of two consecutive frames magnified 400%. The file with N=2 is less accurate and contains noticeable blocking. Even the I-frames don't look as good in the files where N>1.
The test file was a seventeen second Premiere Pro sequence consisting of H.264, MPEG-2, and AE files with effects applied. Exports were rendered from the Premiere Pro timeline and from a V210 uncompressed 4:2:2 intermediate file of the sequence. The following settings were used:
Format: H.264
Width: 1280
Height: 720
Frame Rate: 24 fps
Field Order: Progressive
Aspect: Square Pixels (1.0)
TV Standard: NTSC
Profile: Baseline, Main, and High
Levels: 4.1, 4.2, 5.0, 5.1
Render at Maximum Bit Depth: Enabled
Bitrate Encoding: VBR, 2-Pass
Target Bitrate: Maximized for each Profile/Level
Maximum Bitrate: Maximized for each Profile/Level
Key Frame Distance: 1, 2, 3, 4, 5, 6, 7, 8, 12, 24, 48
Use Maximum Render Quality: Enabled
Multiplexer: MP4
Stream Capability: Standard
Software:
Adobe Media Encoder CS6 Creative Cloud v6.0.3.1 (64-bit)
Premiere Pro CS6 Creative Cloud v6.0.3
Windows 7 SP1
QuickTime Pro for Windows v7.6.9 (1680.9)
MediaInfo 0.7.62 (for GOP and data rate information)

I think the short answer is yes,
a h.264 encoder does I-frame only differently. I frames are complete expressions of a picture with no temporal compression information.
P frames use _P_redictive information. IE information from prior frames.
B frames use _B_i-directional predictive frame information.
h.264 gets the majority of it's bit saving from use of B and P frames. When you do I-frame only you only get the block compression and none of the advantages of P and B frames. Thus the GOP N=1 doesn't get very good bit's per pixel.
Having said all that I do find your comment...
Profitic wrote:
Note how the data rate drops 70% (from 2.17 to 0.66 bpp) even though 50% of the I-frames still exist when N=2. By comparison, here is the video data rate when exporting with QuickTime H.264:
... very interesting. Indeed, why is the datarate 70% less when it should at best be 50% for GOP N=2. 50% less should be the same I-frame information plus 0 bytes for the B frame between them. (GOP = I,B,I). Any more than that and it is throwing away bits from the I-frame. So, this seems to be to be a ratecontrol bug.
http://en.wikipedia.org/wiki/Group_of_pictures
"The GOP structure is often referred by two numbers, for example, M=3, N=12. The first number tells the distance between two anchor frames (I or P): it is the GOP size. The second one tells the distance between two full images (I-frames): it is the GOP length. For the example M=3, N=12, the GOP structure is IBBPBBPBBPBBI. Instead of the M parameter the maximal count of B-frames between two consecutive anchor frames can be used."

What is the Data Rate of the Cache in Adobe Premiere CS6

Hi,
Trying to build a raid array to edit with and want to know how much speed i need for caching read/write drive for premiere and After Effects. I'm of the impression that the cache doesn't need more than a single 7200rpm drive (~120MB/s) but really i have no clue what the data rate that adobe caches to is or what the data rate to read is
so it's 2 questions
how fast does premiere write the cache? (i know this is system dependent but a ballpark figure would be good for say a sandy bridge i5 2500k system with a 2 raid 7200rpm drive)
and
what's the data rate to read the cache in a 1080 24p file?
also, when doing the final export does premiere/after effects read from the Cache or the original files or both?
thx,
Jayson
youtube.com/AWDEfilms

ok i've figured out the physics of this question.
The Cache Read data rate is always larger than the Cache Write data rate, because the computer would have to be rendering to Cache faster than realtime for the Write rate to be higher, which would make it unnecessary to render to cache in the 1st place. So I'm really only worried about the Cache read data rate. Does adobe have a paper that tells us what the data rate is for different sequences.
my 3 common workflows are
canon h.264 1080 24p
AVChd 1080 24p from my GH2 with a 44mb
and
r3d 5k epic footage 24p - (this is painful to edit )
anyone know where this info is?
thx,
Jayson
youtube.com/AWDEfilms

How do you fix error message "data rate for this file is too high for DVD. You must replace this file with one of a lower data rate".

When trying to burn a DVD it will go through the encoding step and at 98% we see the message 'data rate for this file is too high for DVD. You must replace this file with one of a lower data rate". We need help to correct this so we can complete burning to DVD.

What did you export from Premiere?
Did you use the MPEG2-DVD preset... and did you make any changes to the preset?
CS5-thru-CC PPro/Encore tutorial list http://forums.adobe.com/thread/1448923 may help

In Aperture 3.4 Export Slideshow to a video, what are the actual Data Rates used for "Best", "High", ... "Least" quality for a given resolution?

My Photo website host (SmugMug) converts uploaded video files at a specific Data Rate in Mbps before installing them. I would like to compress my slideshow video file to the same rate before I upload it to reduce file size and upload time. When I choose the "Custom" setting for an Export, I can choose 1 of the 5 Quality choices and see the estimated file size. But, I cannot know what the actual Data Rate is until after I wait a long time to export the slideshow (hours for a long slideshow) and then examine the resulting file in QuickTime Player's Inspector.

I ran a few tests using a short slideshow (16 images, 1:23 mins/secs) at 1,728 x 1,080 resolution to find out the bit rates for various quality level choices.
Export setting              Quality          Resulting bit rate          File Size
HD 1080p                    default                20.68 Mbps              214.8 MBytes
Custom                       Best                   20.49                       212.8
Custom                       High                     6.25                         65.0
Custom                       Medium                3.97                         41.3
However, I don't know if those bit rates will be the same for different length slideshows or for different output resolutions. My SmugMug host site uses an 8.0 Mbps rate for a 1728 x 1080 video file. If I choose Custom/Best, my file will be almost 3 times bigger and much higher quality than necessary, but if I choose Custom/High, my file will be smaller and lower quality than SmugMug's converted version.
I have installed MPEG StreamClip that will let me convert an exported Aperture slideshow video file, and StreamClip allows me to choose a specific bit rate in Mbps. But, I would prefer not having to do a 2 step process (Export from Aperture, then convert in StreamClip).

Apple tv slow data rate

HI Guys, i have a problem with one of my Apple TV. I currently have 2 Apple TV and one is having a slow data rate. I have Apple AirPort Time Capsule 2TB (latest gen) with most devices running on wireless connection and I checked the data rate (from the base station) on one Apple TV is showing 65Mbps and on another its showing between 6-13Mbps. The signal reception on both AppleTV is excellent. I have tried unplugging, restarting and restoring the AppleTV with no luck. The model number on this AppleTV is A1427. Any other ideas?

Hi arustandi,
Thanks for the question. If I understand correctly, one of the Apple TV's has a slow connection. I see you have already done a bit of troubleshooting. I would recommend that you read this article, it may be able to help with the slow connection.
Wi-Fi and Bluetooth: Potential sources of wireless interference - Apple Support
Thanks for using Apple Support Communities.
Have a great day,
Mario

ThinkPad Bluetooth with Enhanced Data Rate Software Problem

I'm having a weird issue. I use a X200t tablet with Windows 7 Profession 64-bit.
Apparently my current "ThinkPad Bluetooth with Enhanced Data Rate Software" is Version. 6.2.1.2900.
Thinkvantage System Update wants me to download and install Version 6.2.1.3100.
However, it tries and I get Error 1935 and it rolls back. Now when I start windows I get an alert about BTTray.exe not loading.
Of course I searched this problem, but it seems to be some ancient thing (years old) and I've never had a problem before with any of the Bluetooth updates.
I did notice that in past versions people said when they tried to uninstall the old version and install the new one, it just wiped their hard drive. I don't want to risk that so I thought I'd check here if anyone knew what was going on.
Thanks!

Hi
Welcome to Lenovo Community
You can directly download and install this package . It will not do any harm to any other component of Operating System
http://support.lenovo.com/en_US/detail.page?LegacyDocID=MIGR-70042
Hope This Helps
Cheers!!!

Problem making slideshow. "Data rate to high"

Using Encore CS3 on Win XP. Trying make dvd on a short film and some slideshows. Total c 2,5 GB. Building stops telling me: PGC "Lenas" has an error at 00:01:31:08. The data rate is too high for DVD. You must replace the file with one of a lower rate.....ref, EPGC...." All pictures in slideshow "Lenas" are the same size, 2-2,5 MB, nothing special with the picture at 00:01:31:08. What does the info say?
Preview with no problems.
Regards Gunnar Löwenhielm

What are the pixel x pixel dimensions of those still images?
What is your Encore Project setting?
How many images do you have per SlideShow?
Good luck,
Hunt

Dual data rate stream problem

I am streaming a live source that is being encoded at 2 different data rates. One is a 360Kbps stream, the other is a 28Kbps stream (for dial up users). I have created a reference movie that contains URLs for each of these streams. The high speed one is characterized as requiring 384Kbps DSL/Cable. The second is set to 56Kbps Modem/ISDN.
I have a Mac Mini and a PC on my desktop, both connected to my streaming server directly via the LAN. Both are running Quicktime 7.4.1. Both have their Quicktime Preference for Streaming Speed set for Automatic (The Quicktime default).
The PC always selects the high speed stream. The Mac always selects the low speed stream. The only way to make the Mac pick the correct stream is to set the streaming speed preference manually. I have even tried rebuilding the reference movie, setting the required data rate to as low as 112Kbps, but still the Mac refuses to believe it can handle that speed and picks the other one. The bandwidth to the server is actually in the Mbps range, and the stream plays just fine when it is forced to play through manual configuration.
Does anyone have any insight into why this is a problem? Better yet, does anybody have a way of making this work that doesn't involve having to explain to every user how to change their preferences?
By the way, it's not just my desktop Mac that behaves this way, the same is true for systems coming in from the outside. I'm not sure that it is necessarily clear cut that Macs always fail and PCs always succeed, or what the story is with other Quicktime releases.

How about some more information on the memory you purchasaed. If you purchased (2) 2GB sticks of memory the motherboard only supports 1GB of memory per slot and they will not function properly. Is the Patriot RAM single side or double side and did it work before you installed the 2GB modules??

AP PHY Data Rate Anomaly

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