Questions tagged [measurement]

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How to measure TCP/IP packet loss/packet checksum failure on Windows?

(Windows 10, or Server 2016 or later) I'm sure there are performance counters that can do this - but the ones I've looked at e.g., here at Microsoft's documentation don't really name/describe the ...
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0answers
10 views

iperf: avg latency is larger than max latency?

I use iperf to measure the latency between two machines. The configuration is very simple and uses UDP. Server: iperf -s -u -p 50000 -e -i 1 Client: iperf -c 12.34.56.78 -u -p 50000 -e -i 1 -b 1M The ...
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1answer
20 views

How far does the cursor move when you hit the arrow key?

How far does the cursor move when you hit the arrow key? I am assuming it is a standardized movement in millimetres. Obviously it is dependent on the font size when a larger size is used, but I work ...
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Comparsion of captured traffic in pcap

I'm facing a problem that I can't figure out. My goal: Compare pcaps and measure the loss in capture. Scenario: I've sent data (1,5 GB file) from laptop A via WiFi to shared directory on laptop B. On ...
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2answers
116 views

Sox: Read wav and get pulse as 1 and silence as 0 and the duration of it in microseconds

The title of this question is already very clear I quess. I want to read a wav file and get pulses as 1 and silence as 0 and the duration of it in microseconds. The reason is this, I have recorded a ...
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1answer
133 views

What does a Nibble mean? [closed]

I've tried ip addr show to obtain my MAC address in ubuntu. What is the size of a MAC address? How does a nibble related to bits/bytes?
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1answer
39 views

Keysight 34972A - “*OPC?” function stopped working properly after AC measurement

I use 34972A + 34908A 40ch switch. For some reason "*OPC?" command (waiting for the operation to complete stops working after AC measurement request. The measurment is still executed, but "*OPC?" ...
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1answer
282 views

How to measure the color of a screen (in HEX)?

I'm developing a new advanced review website for all kind of devices. And for that, I want to measure the accuracy of colors from displays (for example a smartphone or a normal screen). I already have ...
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0answers
55 views

Internet Usage Tracking Inaccuracies

Quick BackStory: I have got a 4G router that I carry for vacation and my family absolutely burnt through the data plan, so I decided to make a small program that tracks the usage and assigns daily ...
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1answer
119 views

How to objectively test LCD for very slight “blurriness” (and prove it is not just my imagination)?

In this question, I keep "re-imagining" that the LCD panel is slightly blurry or causing me eye strain. The cause might be a tiny deviation in any number of things: voltage, timing, dithering, ...
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1answer
740 views

What means 's' and 'u' letters on CPU utilization in iperf3 command with -V?

i have very simple question: When Im using Iperf3 with my server and on client i add paramater -V which mean it will display more detailed information it's display information about CPU utilization on ...
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1answer
1k views

Set Excel's ruler to Pixels (2016)

Excel doesn't give you an option to measure things in pixels. Is there any way to set this or add these units to the list? I'm tired of having to click-and-drag while resizing to get the pixel ...
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0answers
49 views

How can I measure the shock absorption of a key switch?

One common criteria when choosing a keyboard is looking at the shock absorption of its key switches. How can I measure the shock absorption of a key switch? E.g., the actuation force can be measured ...
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2answers
8k views

Use GIMP to import PDF as vector graphics rather than rasterized graphics

I need to use GIMP to measure the distance between sections of an image, but I noticed that GIMP seems to rasterize what I believe ought to be a vectorized PDF image. Adobe Reader has no problem ...
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5answers
25k views

How do I tell the dimensions of the current selection in GIMP?

Oftentimes, I need to measure the dimensions of part of an image (in pixels). In Photoshop, I can make a rectangular selection and see the dimensions in the "Info" window (or something like that). How ...
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2answers
99 views

Transfer speed when moving files around the file system

When I am copying files to other locations on my hard drive, what is the speed I am seeing measuring? Is this the write speed of the HD or the SATA transfer speed?
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1answer
228 views

How am I exceeding USB 2.0 speeds on a USB 2.0 port?

I am writing files to a USB 2.0 drive from a RAM disk, that has a 256MB random filled file on it (created from /dev/urandom to stop the file being compressed too much). When I look at the speeds of ...
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0answers
18 views

Measuring Throughput of Remote Mounts

Is there a way to measure the throughput of say a remotely mounted sshfs share or samba share over openvpn in a linux environment?
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2answers
3k views

convert db to dbm of a wireless device

I bought a replacement wireless device. I want to compare it's stats with the old one. I'm not very familiar with measuring units. Old device showed 60dbm (I think negative value) as signal strength. ...
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1answer
343 views

monitoring ISP bandwidth data

On Windows/Linux, what would be a way to run a sample measurement of the bandwidth that I have available? I need to run a measurement at periodic intervals. There are many website which will give you ...
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0answers
871 views

Using Kinect to measure a building

working as a student trainee I was asked to measure a production hall (and all the machines etc in it) with a laser rangefinder and a folding rule and model it in 3D CAD software (Autodesk Inventor). ...
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1answer
4k views

What units does `ps -o` report memory usage in?

I'm using a script - memusg - to report the peak memory usage of my rails app. The script uses ps -o to measure memory usage. My question is: what units does ps -o report memory usage in? The script ...
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2answers
2k views

Looking for a way to make a grid on the screen to help position elements [duplicate]

I'm working with CSS and at times it's hard to see if something's centred. Is there a program or some way built into a browser that I can make a grid appear on the screen? I'm using FireFox on Windows ...
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7answers
32k views

Is there a USB power consumption meter?

For example, how could I measure the normal power consumption of my USB keyboard? After I get my statistics, I may easily notice when a hardware keylogger gets installed, by the changed power ...
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2answers
3k views

Very precise measurement software for Windows [closed]

I have bought a digital USB microscope: Which can take images like this: I would like to measure – as accurately as possible – the width of the white line on screen, as you see in the picture. ...
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1answer
80 views

Adobe CS5.1; I want the measure tool as the default; when I use Ctrl-I, the measure (ruler) tool appears… is this sort of thing possible?

I scan many slides, transparencies, and negatives. I need to straighten them often. I would like the ruler/measurement tool under CTRL-I to remain as the default with eveery start of Photoshop. Is it ...
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2answers
103 views

How to make ideal conditions to measure performance of my app on Windows 7

I want to measure performance of my RayTracer and I want to create some ideal test conditions on my PC. I am using Windows 7. Is there some application, which can turns the system into "measurement ...
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1answer
195 views

detecting reason for slow LAN

hi we're having a small company LAN with about 10 boxes and a wireless webcam. the problem is that internet + lan is really slow and i'd like to find out which client is causing it. is there a tool ...
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1answer
747 views

How to measure the power consumed by a program in Windows? [duplicate]

Possible Duplicate: Windows application that debug battery consumption I have the following dilemma: I am testing several programs which have power saving features that can be used on laptops ...
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1answer
1k views

Measure sound input loudness on Linux

Is there a way to measure sound input loudness, specifically from a mike, in dB, on Linux?
2
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1answer
486 views

How much power will my 1200W 80+ Gold power supply provide to system components?

I am a bit confused over the terminology and efficiency rating of a power supply. For instance, under 100% load my 1200W 80+ Gold power supply is listed to operate close to 88% efficiency. What does ...
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1answer
273 views

Minimal image measuring software [closed]

I'm looking for a software which enables to measure a distance in an image. Something in the style on Photoshop's ruler and 'guides' system is what I have in mind (but I'd take suggestions in other ...
3
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2answers
3k views

How reliable a measure of relative CPU Performance is MIPs?

I notice no marketing mentions MIPs, and its not mentioned in specifications for processors. How reliable is this statistic? By now we all know more Mhz and Ghz is not necessarily a good direct ...
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2answers
4k views

RAM: unit of measurement for size

Just need it clarified with some references if possible, when I buy 2GB DDR2 RAM. Is the GB measured as gigabyte or gigabit?
4
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1answer
270 views

Command-line tool to measure how fast a file is growing?

Is there a command-line tool to measure how fast a text file is growing, in units of lines/second? For small-ish files, I can do something with watch and wc -l, but that measures the file anew each ...
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3answers
242 views

Software to measure the speed of http browser connections [closed]

I'm trying to gather some ammunition about my ISP and it's aggressive traffic shaping of particular websites. So I'm looking for an application that will allow me to see what speeds I get to ...
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6answers
33k views

How can I log my hard drive activity by program?

I am using Windows XP and am looking for a utility that can tell me the percentage of hard drive activity a program is using. Basically, I'm looking for something like Task Manager and its ability ...
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3answers
4k views

Recommendations for a cheap USB peripheral for PC to measure voltage [closed]

I'm looking for a cheap USB peripheral that I can use to collect voltage measurement data. The application that I currently have in mind is to measure battery capacity by attaching a known resistance ...
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8answers
3k views

Cable modem speed test

Are the popular speed tests (cable, dsl, etc) that are available accurate? if so, how? Also, it seems that they only measure download speed of one file and not responsiveness, latency, robustness, etc....
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3answers
3k views

How can I measure distances on online map using my mouse?

There appear to be a number of tools available that monitor the distance your mouse travels in a day, ie here - http://www.google.com/search?hl=en&q=measure+mouse+distance I'm looking for one ...