Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums Thank you for visiting RF Cafe!

How Far Can a Soundcard Based Test & Measurement System - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


TestGuru
 Post subject: How far can a soundcard based test & measurement system
Posted: Tue Nov 21, 2006 3:33 am 
 
Lieutenant

Joined: Fri Nov 17, 2006 6:10 am
Posts: 1
Almost every PC or Pocket PC have a built-in sound card. Sound cards
are usually treated as an audio input and output devices for recording,
synthesizing, and replaying speech, music and songs. However, sound
cards can do more than that.

From instrumentation and control point of view, a sound Card is a dual
-channel A/D and dual-channel D/A device, which has a flat frequency
response in audio frequency range and have a sampling rate of up to
192kHz, sampling depth of up to 24 bits. Even without any external
attenuation circuit, it is able to measure a signal from down to 1 uV
to 1V, thanks to its built-in gain control (like Mic Boost, Mic Volume
and Line Volume).

Measurement accuracy depends on its hardware quality. Normally, an
internal standalone sound card is better than an on-board sound card (
chip), and an external sound card is the best. Professional grade sound
card is better than consumer grade sound card. In terms of price, even
the professional grade sound card is much cheaper (a few times
normally) than its peers in A/D and D/A cards.

The accuracy of the clock reference is 0.00x% typically for an ordinary
sound card. For example, a 0.003%'s inaccuracy in a sampling rate of
44100 Hz means an error of only 1.3Hz. The noise level of a good sound
card can be below -100dB, THD below 0.0029%.

So, what can be measured by a sound card. Well, it can measure any
signal perfectly within audio frequency range, like vibration signal,
rotational speed, heat and Lung sound, ECG....., depending on the

sensor used, and of course, depending on the software used. A good one
can be found at: http://www.virtins.com. It is FREE to download and
try.

website: http://www.virtins.com
PC version: http://www.virtins.com/SCMISetup.exe
Pocket PC version: http://www.virtins.com/PocketINSSetup.exe


Virtins Sound Card MultiInstrument consists of a sound card dual trace
oscilloscope, a real time spectrum analyzer, and a signal generator and
can run them concurrently. It features a specially designed data
acquisition approach, which is able to monitor the input signal
continuously without missing any trigger event before a frame of data
is collected. It has a very fast screen refresh rate. It supports
sophisticated triggering method including pre-trigger and post-trigger.
A comprehensive range of functions are provided, including waveform
addition and subtraction, Lissajous Pattern, transient signal
recording, voltmeter, RMS amplitude spectrum, relative amplitude
spectrum, octave analysis(1/1,1/3,1/6,1/12,1/24),THD, THD+N, SNR,
SINAD, peak hold, phase spectrum, auto correlation, cross correlation,
function generation, multitone generation, arbitrary waveform
generation, white noise and pink noise generation and sweep signal
generation. It Supports 8, 16, 24 bits and multilingual user interface,
including English, French, German, Italian, Spanish, Portuguess,
Simplified Chinese, Traditional Chinese, Japanese, and Korean

Image
Image


 
   
 
Mr.Whatever
 Post subject:
Posted: Sun Nov 26, 2006 1:08 pm 
 
Captain
User avatar

Joined: Fri Apr 07, 2006 6:10 pm
Posts: 20
Interesting. Thanks! I've been looking for something like this.






Posted  11/12/2012

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:
 AirplanesAndRockets.com

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

height-line