Measure speed of wireless?

My wireless performance using Time Capsule seems sluggish. How can I measure?

Thanks for the info. You can use a utility like www.speedtest.net on her computer to test the Internet connection speed and compare that with the plan that your service provider is furnishing to you.
What download speed do you see here?
Do other sites download slowly as well, or it just this one?
How many walls and/or ceilings are in the signal path between the main wireless router and her computer?
Have you picked up any new cordless phones recently, or moved them around?
It is normal for the wireless speed to be less than a direct wired connection due to some loss in the wired to wireless conversion process and wireless security settings. The connection speed will also fall off with distance and obstructions in the signal path, as well as wireless interference from cordless phones, other wireless networks at the neighbors, and wireless camera/security systems.

Similar Messages

Speed on wireless

Hi,
I have a macbook pro with band n avaliable on wireless. But the speed is always slow on wireless compared to wired. I am on 100mb internet.
When wired, I did a speed test on speedtest.net and it comes to 90Mpbs, which is what I want, But once I try wireless it never goes over 30Mbps.
Now I know it could be due to a number of things, like change channels on wireless to find the best channel. Is there actually a limit what speed it will get on wireless. The only thing I can do to make faster is to change the band from 2.4ghz to 5ghz, even that sometimes only goes up to 50Mbps, but that also means almost none of my devices in the house can connect via 5ghz.
So im confused, just need some advice on the actual limitations on wireless please, and anything else I can do to improve. Thanks.

The broadband internet speed most ISPs quote is the maximum transfer rate that their connection can achieve under ideal conditions. If their system is heavily loaded, or the site you are connecting to operates at a lower speed, you will not be able to achieve their quoted speed. There is always a choke point somewhere.
Now, with respect to your in-house speed: wired is always fastest. Eithernet can achieve speed up to 1 giga bit per second. No ISP provides that access speed. Wireless over n protocols in the narrow 2.4 GHz band achieving speeds of 30 Mbps are doing well, and 50 Mbps in the double-width 5 GHz band sound good.
I guess bottom-line is, if you are getting speeds as high as 50 Mbps you are actually doing rather well...many ISPs do not offer service at that level.
By all means, see what the activity level is in the frequency band/channel you want to use. If you see a lot of other networks, move half a dozen channels and see what it looks like there. If you can find a clear channel you will get the highest transfer rate your hardware is capable of delivering.
As long as all of your devices have the capability of working in the selected channel you are good to go.

WRTU54G slow speed through wireless.

Hello
I recently set up this router above and the speeds through wireless are about 1/3rd of the speed when connected through cable. Signal is strong and set to channel 11. No home phone whatsoever on that frequency. I'm also using the mixed wireless mode. Any ideas before I put it on craigslist? The router is new. Firmware is 1.00.15
Thank you

Try this,
Open an Internet Explorer browser page on your wired computer(desktop).In the address bar type - 192.168.0.1 and press Enter...Leave username blank & in password use admin in lower case...
For Wireless Settings, please do the following : -
Click on the Wireless tab
-Wireless Network mode should be mixed...
-Provide a unique name in the Wireless Network Name (SSID) box in order to differentiate your network from your neighbours network...
- Set the Wireless channel to 11-2.462GHz...Wireless SSID broadcast should be Enabled and then click on Save Settings...
Please make a note of Wireless Network Name (SSID) as this is the Network Identifier...
For Wireless Security : -
Click on the Sub tab under Wireless > Wireless Security...
Change the Wireless security mode to WEP, Encryption should be 64 bit.Leave the passphrase blank, don't type in anything...
Under WEP Key 1 type in any 10 numbers please(numbers only and no letters eg: your 10 digit phone number) and click on save settings...
Please make a note of WEP Key 1 as this is the Security Key for the Wireless Network...
Click on Advanced Wireless Settings
Change the Beacon Interval to 75 >>Change the Fragmentation Threshold to 2304, Change the RTS Threshold to 2304 >>Click on "Save Settings"...
Now see if you can locate your Wireless Network and attempt to connect...
Check the Wireless Connection status, if it gives you 54MB/sec of Speed then it should be fine...

How to increase measuring speed of Agilent 34401A

The process of my program (written in Labview) is:
1) A control code is automatically generated by the program, and the code is sent to multiplexing circuit (the chips I used are ADG706) through digital port (USB6501 from NI) then a coresponding channel is selected. (for example code hex0000 selects 1st channle,0001 selects 2nd channel, and so on......)
2) Multimeter Agilent 34401A measures the current value of this channel, and send this value back to the computer for storage. After this, the program goes back to step 1) for next channel, and this program executes like this.
The functions mentioed above are all realized, and the program works well, but the problem is the speed is slow. It takes a little more than 1 second to measure one channel, totally I have 2048 channels (32 groups and 64 channels in each group, I used two layers of "for" cycles), and it takes about 32 minutes to finish measure all these 2048 channels, too slow, I'd like to reduce them to 10 minutes.
I tried to reduce the resolution to 4.5, turn off the autozero function of multimeter, but nothing happens, no change of the speed. Now every time the multimeter measures a channel, it makes a "click" sound, does it mean that every trigger the multimeter only takes one measurement? Is there anyway I can increase the measuring speed? Can I send the multimeter 64 control condes a time, and then let the multimeter takes 64 measurments in one trigger? Is it right? If so, how can I realized it? If I'm wrong about it, can you give me some solutions?
Thank you very much!

I don't have the manuals with me, but I do have a couple of these in my lab. There is an internal buffer where you can store (I think) 512 readings. You can use a digital output to trigger the DMM, and only transfer after every 512 readings (4 times) or perhaps one read per group as you mentioned. I suggest one read per trigger (you can do many more) since it is easier to synchronize with your channel changes. I believe the commands are INIT and FETCH?, check your manual. The two times I know the instrument "clicks" are changing functions and certain range changes. I suspect in your attempts to speed things up you are sending some config. commands each time. Configure it once initially and make certain you are only sending measurement related commands during the scan, any config. changes (even if you resend the current value) will likely cost you time.

What is the Cisco tool for measuring traffic of wireless endpoint users

Hi Experts
I am looking to start a Mesh WISP utilizing Cisco Aironet products (1500 series) and would like to know what is the best Cisco (or if the case has to be "non Cisco") product for measuring the amount of traffic from wireless clients connected to my Cisco Mesh.
Basically I want to be able to say User xyz has this IP xxx.xxx.xxx.xxx how much have they uploaded and how much have they downloaded this month.
This also then allows me to integrate multiple business mobile devices into their broadband plans which is something no-one yet offers in my City.
From what I have read Netflow is the measurement technology but how do I take this data and aggregate it by IP / User for billing purposes. Is there something better at it than Netflow? Your expert opinions and suggestions are much appreciated.
Regards
Ty

That sounds like Cisco Wireless Control System (WCS).
Cisco Wireless Control System (WCS) Data Sheet
http://www.cisco.com/en/US/prod/collateral/wireless/ps5755/ps6301/ps6305/product_data_sheet0900aecd802570d0.html
Please don't forget to rate useful posts. Thanks.

13 download speed at modem and 5-8 speed in wireless network

Can anyone tell me why our iMacs and MacBook Pros that are connected via ethernet have download speeds of about 13, yet our wireless network (new airport extreme+2 expresses) have speeds of anywhere from 5 to 8? This makes our Apple TV work inconsistently!

Can anyone tell me why our iMacs and MacBook Pros that are connected via ethernet have download speeds of about 13, yet our wireless network (new airport extreme+2 expresses) have speeds of anywhere from 5 to 8? This makes our Apple TV work inconsistently!

What sensor should be used to measure speed of motor

Hi,
I am using NI PCI-6624 to control the speed of dc motor. I have used "PWM-Counter Output.vi" example to generate PWM pulses to control the input power of motor. I am using "counter output" and "analog input" terminals of PCI-6624. Counter output terminal is used to generate PWM signal and "analog input" terminal will be used as an input from speed sensor.
Can someone tell me what sensor I can use to measure the speed of motor. Please note that the output of the sensor will be the analog input to PCI6624, so it is essential that speed sensor's output is ANALOG.
Please help me in this matter and tell me which sensor can be used and from where I can buy it ?
Thanks

Ayaz,
the straight forward low-cost solution for velocity measurements is using a quadrature encoder. With your DAQ device you could use the second counter of the board to measure the frequency of one phase, but that's jus one option amongst others.
I haven't come across sensors that output a voltage that is proportional to velocity but expect such a device to be much more expensive and probably less accurate.
Do you plan to do closed loop velocity control? Are you using Windows or a realtime system?
Kind regards,
Jochen Klier
National Instruments

Measuring speed of execution of loops

Hi,
I wanted to know how to measure the speed of execution of each loop in case of a stached sequence structure. The loop basically has an input for steps for measurement of the Capacitance Voltage characteristics. Now, I was keen to know how do I measure the speed of operation during any particular step. I found something was the Profile VIs but is there any better way to measure the speed of operation? I am attaching herewith the VI that is being used.It has several sub-VIs.But, YOu can just get an idea of what I need by browsing through this VI.
Attachments:
CVWAIT33.VI ‏85 KB

In general, a good timing device is a 3 frame sequence. The first and third frames have a ms counter (from the Time & Dialog palette) and the second has the code. Then, you substract the value in the first frame from the value in the third and you know how many ms it took. The problem is that many things take less than a ms to execute and that is something you can only measure statistically, by running your code many times in a for loop (let's say a million times).
If you want iteration times, you can accomplish the same by using a shift register to keep the value of the ms counter from the last iteration and substract it from the current counter value.
Try to take over the world!

Anyway to speed up wireless mighty mouse tracking??

i finally made the plunge and added a WMM to my dual G5 2.5MHz. I love the wireless part and will likely add the keyboard later. The biggest problem I'm having is that tracking is slow. Not jumpy like other folks are experiencing, just slow. I've got the older 23" Cinema HD monitor and I prefer a large movement of the pointer to a small input of the mouse. I've got the tracking speed maxed out on the control panel. Any way to make it faster? thanks.

Thank you very much for your help - it is exactly as you describe:
A login / logout is needed for the changes to take effect (and I'm embarrassed I didn't think of that myself!), and then any subsequent changes in the Keyboard/Mouse pref pane overwrite this, so you have to re-edit the plist and logout and back in again.
Many thanks!
EDIT: I wanted to mark this as "solved", but can't. I'm guessing its cos I didn't ask the original question...

Measuring speed with incremental single counter

Hi,
I need to measure the rotational speed and acceleration of a wheel that has 3 hall sensors on it. I will use only 1 of them en it gives 24 pulses 0-5V for a 360° rotation. How can I measure the speed with only a pulse train. I dont have the Quadric encoder...
Now I'd like to measure the rotational speed using a counter of some sort, but the software I tried writing for it isnt working.
Thank you for your help

Hey Nitch,
Concerning the measurements errors:
As you get error when speeding up, it looks like the pulses coming from the hall sensors are to short to get measured by the counter.
Following the USB-6008 specifications, the pulse needs to have a minimum lenght of 100ns (both in high and low state).
As a counter is using edges to count the pulses (for USB-6008 only the falling edge) the edges need to comply with the TTL specifications which means that the rise and fall time of the pulse needs to be within the 50ns range.
So please have a look at the pulse lenght at higher speeds (are they at least 100ns?) and make sure the pulse comply with the TTL specifications.
If not you will have to add some additional electronics to reshape the pulses.
Looking at your program.
It's not nescesarry to have two loops. It's very well possible to have two DAQ tasks within the same look.
Have a look at the Examples which come with LabVIEW --> Exampled Finder --> Hardware Input/Output --> DAQmx --> Synchronization --> Multi-Function.
There are some examples which so the combination of analog and digital input.
Anyhow you will have to remove the right while loop as the DAQ Express VI which apparently gives you the "spanning, stroom, gashendel" values will only start once you have done the counter measurements. I assume that you would like to have the "spanning", "stroom", "gashendel" and"speed" synchronized measured.
Then you have the choice to log to file during acquisition or after the acquisition.
If you would like to log on the fly don't use the express VI's, but use the lower lever "File I/O" functions. These are faster (less processor time usage).
As you VI is written now, the left while loop will only output the lastest counter value measured to the next loop when you click the stop button for example.
You have to "Enable Indexing" of the m/s output tunnel. Right click on the tunnel and you will be able to select "Enable Indexing".
This way the application will automatically create an array and each loop iteration the measured value will be added. One the measurements have been done you can do analysis and save the data using the full array instead of point by point.
Again, also bring your "spanning, stroom and gashendel" inputs to the left loop.
In your right loop you also have a loop counter.
You can simply use the loop iteraction counter (the square box in the left bottom corner with the i). This is also counting from 0 and incrementing by 1 each loop iteration.
Again, you can do this in the left loop and forget the second loop completely.
Hopes this will bring you a step further.
Don't hesitate to post the VI itself. This is always easier to look at than an image.
This way we can also make some modications and post it back.
Best regards,
Joeri
National Instruments
Applications Engineering
http://www.ni.com/ask
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Using a microphone to measure speed

My problem is that i am trying to measure the speed of a fan using a microphone with labview, any ideas??????

And I thought this would be a tough one....
Input the microphone to your sound card, Run the fan and capture the sound. Send the sound through an FFT. If the microphone is placed near the outside of the blades, facing the output of the fan, you will get a "beat frequency" of the fan blades. This will give you a very low frequency. Divide by the number of blades and 60 and you will get the RPM of the fan.
What you are trying to do is to isolate the frequency that occurs when a fan blade passes in front of the microphone, compressing the air, pushing the cel of the mic in, then the blade passes, decompressing the air (in relative space of course), pulling the cel out. This is a very strong component of the sound you will measure with the mi
crophone, and should be very easy to see in the FFT. If you want to get fancy, you can isolate this peak in the FFT, apply the math to convert it to RPM, and output the fan speed.
Good luck. 'Sounds' like fun...

Measuring speed, both Broadband and LAN

Hi,
Can someone please advise me of a reliable method of measuring the speed i'm getting on my broadband.
I've tried speedtest.net and thinkbroadband
Speedtest.net showed 94Mb/s with one PC connected to the gigabit port on the homehub when the BT man was here. Now the best I get is about 50, but normally about 25 with the same setup, and other computers on the network drop as low as 12.
For the LAN PCs, are there any recommended tools I can use to try and figure out what's causing the slowdown?
For the actual broadband speed, what should I be using to measure this?
Thanks
J

Hi,
Thanks for the replies,
Yes, i'm on the FTTP trial.
Here's my test results from the PC connected directly to the router at 100Mb/s earlier today.
Test1 comprises of two tests
1. Best Effort Test: -provides background information.
Download Speed
57590 Kbps
0 Kbps
106417 Kbps
Max Achievable Speed
> Download speedachieved during the test was - 57590 Kbps
For your connection, the acceptable range of speedsis 12000-106417 Kbps .
Additional Information:
IP Profile for your line is -106417 Kbps
2. Upstream Test: -provides background information.
Upload Speed
14759 Kbps
0 Kbps
15000 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 14759 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 15000 Kbps
And here's one from just now. I guess we're in to peak time now.
FAQ
Test1 comprises of two tests
1. Best Effort Test: -provides background information.
Download Speed
55688 Kbps
0 Kbps
106417 Kbps
Max Achievable Speed
> Download speedachieved during the test was - 55688 Kbps
For your connection, the acceptable range of speedsis 12000-106417 Kbps .
Additional Information:
IP Profile for your line is -106417 Kbps
2. Upstream Test: -provides background information.
Upload Speed
10372 Kbps
0 Kbps
15000 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 10372 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 15000 Kbps

Digital frequency measurement speed in labview

I am using a USB 6210 device to measure low frequencies of 50 to 1000 Hz. I need to log the frequency every 50ms. I do this in a while loop in labview using a 1 counter low frequency measurement in labview and saving the data using express VI.Each iteration of the loop takes atleast 60 to 100 ms just to read the frequency inside the loop. How do i increase the speed of measurement in Labview ?
Solved!
Go to Solution.

PraveenB,
Here is a table of the Counter terminals and related PFI lines. This can be found in the NI DAQmx Help. (http://digital.ni.com/public.nsf/allkb/CCDFC93878BD8781862570FC00559980?OpenDocument)
Default NI-DAQmx Counter Terminals
Counter/Timer Signal
Default Pin Number
Signal Name
CTR 0 SRC
1
PFI 0
CTR 0 GATE
2
PFI 1
CTR 0 AUX
1
PFI 0
CTR 0 OUT
6
PFI 4
CTR 0 A
1
PFI 0
CTR 0 Z
3
PFI 2
CTR 0 B
2
PFI 1
CTR 1 SRC
4
PFI 3
CTR 1 GATE
3
PFI 2
CTR 1 AUX
4
PFI 3
CTR 1 OUT
7
PFI 5
CTR 1 A
4
PFI 3
CTR 1 Z
2
PFI 1
CTR 1 B
3
PFI 2
FREQ OUT
8
PFI 6
When you choose counter 1 in the Create channel VI it automatically reserves the gate which is PFI2. If you use Counter 0 then PFI 2 will work fine. Likewise if you use Counter 1 you can use anything but PFI 2.
Message Edited by Jason_D on 10-24-2008 11:43 AM
Sincerely,
Jason Daming
Applications Engineer
National Instruments
http://www.ni.com/support

Measure frequency of Z pulse of an accu coder shaft encoder to measure speed using an 6034 E card

Hi,
I would like to measure the speed of a engine which has an accu coder encoder hooked onto it. It provides 3 pulses A, B, and Z. I am using a 6034 E PXI card. I wanted to know if there are any examples/ideas that could help me with this (I am new to the digital programming in Labview). I have moved to NI Daqmx 9.8 recently from the older version which supported legacy codes and hence in process of updating the code. I also want to know if an external clock source is required to do this. this.
Solved!
Go to Solution.

Hello,
There are several examples in the NI Example finder (you can get here by going to Help >> Find Examples in a LabVIEW window). You can browse to the encoder examples by going to Hardware Input and Output >> DAQmx >> Counter Input. You should be able to find a few examples that will be helpful.
Also, this link is a good resources for getting started using DAQmx: http://www.ni.com/white-paper/5438/en
Thanks!
Stephanie S.
Application Engineer
National Instruments

Gigabit wire speed and wireless speed

I'd like to hardwire the gigabit ethernet ports on my Extreme to my TV and game console. Assuming the TV and game console support gigabit, will speeds on the gigabit wired network be inhibited by connecting older (802.11g) laptops to the 802.11n wireless network? I know that speeds are limited by the slowest device connected to the network, but don't know if that extends to wireless devices as well.
Thanks for any suggestions,
Ian

Ian,
The whole thing is pretty much a moot point if you are connecting your network to the Internet. Even "g" wireless speeds are 54 Mbps. That's probably quite a bit faster than your Internet connection speed with your provider, correct?
The Internet connection is almost always a severe "choke" point on any home network. 100 Mbps or 1000 Mbps connections won't matter much if the devices have an Internet connection, as is likely with your TV, Game Console, Computers, etc.

Measure speed of wireless?

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