Pc Signal Generator Software
Always thought of making your own PC based signal generator? Advantages of PC based signal generator: - 1. Low cost, no need to spend lot of money (costs about Indian Rs.30 = US$0.67 = costs almost nothing). Can generate complex signals, like Sin(f1) + Sin(f2). Any function that you can write and understand its limits can be generated from PC.
Easier to operate, because, most people who finds signal generator useful are well versed in computer software + hardware. If you use a output buffer amplifier, the chances of damaging your PC sound card is very small. In other words, it is safe.
Portable i.e only laptop is needed. Do not need to carry one more signal generator. Use PC sound card, unless you listen to lot of music while working on electronics stuffs. Disadvantages of PC based signal generator: - 1. Might damage your Sound card (and/ or) PC if you do not understand the limits and do not understand what are you doing.
Cannot generate frequencies higher than 20KHz (or slightly higher). Simplest form of of PC based signal generator: - I decided to go for the PC based function generator by generating the frequencies using the audacity software: - Once you install the software, it has a menu to generate a 'tone'. Just select the frequency you need and then PC generates the output (from the audio jack). I observed the output from my PC by connecting the oscilloscope on the headphone output (audio jack). The output from my PC had good fidelity for frequency, but the output was centered around GND level (0V). That means, the output had both positive and negative half cycle. That was not a good news for me as most of my signals are interfaced to micro controllers, which accepts inputs from 0V and positive.
In other words, I needed signal with DC offset added to it. Searching the audacity menu, I could not find an option to add DC offset. Then I tried with MATLAB by writing a function to generate sine wave with DC offset, but still no help (read towards end of page to generate signals with MATLAB). Searching the internet, I found that it is actually a feature of sound card, by which it can eliminate any DC offset before the signal comes out. The main purpose is that audio signals with DC offset does not work good on speakers as they simply drive DC current without doing any vibration (which produces the sound). Moreover, DC offset reduces the dynamic range of a signal.
Observe the waveform below as how the sound card removes DC offset, when I tried generating a rectified sine wave (asb(sine). In this picture, initially, the DC offset is present in the waveform. But as time progresses, the sound card removes the DC offset and signal becomes centered around the GND.
To add DC offset, I made a simple circuit which uses LM358 as non inverting summing amplifier. The circuit works good and is tested well with different frequencies.
Moreover, this circuit (non inverting amplifier) acts as a buffer between the PC sound card and the external circuit. Hence it can supply the required current without loading the PC sound card. How to generate complex signals (using MATLAB): - If you have MATLAB on your PC, then you can use that to generate complex signals. Such complex signals cannot be generated by audacity software. The generation of complex signals is usually a feature of high end signal generator using DDS (direct digital synthesis).
But using MATLAB and the circuit above, we can create a sophisticated DDS, where, the function is written on MATLAB and the same signal appears out of sound card, in physical form.
Audio Tools - from David Taylor, Edinburgh There are four audio tools that I currently offer - a for frequency response analysis, resonance detection etc., a weather satellite recording level meter, a simple and a for direction finding or audio phasing checks. Software Support and Registration The Audio Tools are currently freeware, but if you require support on the software you must. Please note that you must directly for support. You can register for support for SatLevel, SweepGen and VectorScope together for less than about $35. If you like the software, or use it regularly, registering is also an easy way to say 'Thank You'. A reminder that you can free of charge to be automatically notified of any.
Pc Signal Generator Software
Full version - the Audio Test Set There is a much more advanced version of these tools available as my Audio Test Set which includes the sweep generator with tracking spectrum analyser and oscilloscope functions. Please visit the for more details. SweepGen turns a PC into an Audio Oscillator and Sweep Generator which can be used for testing audio or educational purposes. In conjunction with audio test instruments, you can make frequency response plots.
Signal Generator Software
SweepGen uses the sound card in your PC to produce sine waves that are mathematically correct almost to CD quality, indeed it's more likely that the quality of your PC sound card will be the limiting factor rather than the code in SweepGen. V3.6.2 Add impulse generation option for speaker phasing testing. V3.7.2 Add trigger burst before audio sweep (fast sweep only, 2.0 KHz burst on the right-hand channel). V3.7.4 Correct trigger-burst pop-up hint. V3.7.6 Greater output attenuation range, change default level to -20 dB ( 464,447 bytes; 2015-Aug-10) MD5 signature: 6A54DB5DF9E0141FEF6AE466177F0DCF If you like the software, or use it regularly, is an easy way to say 'Thank You'. This program allows you set the gain or input level to a sound card to record weather satellite signals from Meteor/Resurs, NOAA or SICH/Okean satellites. V1.1.0 uses the newer.
Pc Signal Generator Software
Requirements:. 16-bit Sound Card Program to generate a single sine-wave toneburst when a button is pressed. Full source code is provided, as I see this program more as an example.
The Beeper.pas unit that is included can be used in you own code (please acknowledge copyright if you publish this code, and do so unmodified!). Users of this component include BBC News who use it as an alert for blind users. V1.4.0 adds Risetime/Falltime, and Amplitude properties.
Library requirements:. If you like the software, or use it regularly, is an easy way to say 'Thank You'.
This program plots the left and right components of a stereo signal as vectors in such a way that the direction of arrival of the signal can be estimated. This has application to direction finding, or audio phasing checks. A screen-shot from an earlier version. ( 311,154 bytes, 2016-Sep-26) If you like the software, or use it regularly, is an easy way to say 'Thank You'. Copyright ©, Edinburgh Last modified: 2016 Sep 26 at 10:13.