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In article .com,
wb0gaz wrote: This is probably not that complicated (I hope?!?) but I need a PC program that would just tell a PC soundcard to generate a standard CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older FM amateur transceiver. I don't want to find/buy/build a CTCSS module for it, and will have a PC handy. I imagine a WAV file could be created, but if there is some kind of software (perhaps a "function generator" program) that would be ideal, particularly if you could just give it the frequency in Hz or something like that, and get a steady sine wave out of the sound card. Try http://www.goldwave.com/ for a Windows-based solution (fully-functional demo version can be downloaded). For Linux, try http://audacity.sourceforge.net/ (free) Both of these should be able to generate, and then play, a WAV file having a sinusoid of almost any desired frequency within the PC's audio bandwidth. I used Audacity to generate precise sinewaves to be used when calibrating an FM modulation meter via the Bessel-function null method. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
In article .com,
says... This is probably not that complicated (I hope?!?) but I need a PC program that would just tell a PC soundcard to generate a standard CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older FM amateur transceiver. I don't want to find/buy/build a CTCSS module snippety What you describe is a lot like using a 40mm antiaircraft gun to shoot down a rubber-band powered model airplane. What happens when you suddenly need to use your sound card for something other than a PL encoder? $28.95 plus a little for shipping will get you a perfectly usable dedicated CTCSS encoder, as described at this link: http://www.com-spec.com/ss64.htm PC's are not, contrary to popular belief, the Answer to All Things Radio or Technical. This is one area where a dedicated purpose-built device would be a much better investment of your time and money. Happy tweaking. -- Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute. (Known to some as Bruce Lane, ARS KC7GR, kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?" |
On 8 Mar 2005 19:41:49 -0800, "wb0gaz" wrote:
This is probably not that complicated (I hope?!?) but I need a PC program that would just tell a PC soundcard to generate a standard CTCSS If you are hopeing to get the CTCSS tone through you Microphone, forget it. The frequency response of the Mic and Modulator will probably prohibit any success but have a look at this link http://www.qsl.net/ta2mbd/elektronik/af/ctcss_16c84.htm It describes a cheap solution to your problem and it does'nt use a steamhammer to crack a nut. hth Mike W, G8NXD qthr |
"wb0gaz" wrote in message
oups.com... This is probably not that complicated (I hope?!?) but I need a PC program that would just tell a PC soundcard to generate a standard CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older FM amateur transceiver. I don't want to find/buy/build a CTCSS module for it, and will have a PC handy. I imagine a WAV file could be created, but if there is some kind of software (perhaps a "function generator" program) that would be ideal, particularly if you could just give it the frequency in Hz or something like that, and get a steady sine wave out of the sound card. Very tks, 73 Dave WB0GAZ Dave - You may be missing the point of CTCSS. It is NOT like "Touch Tone" sounds that can be insert through the microphone input and pass through the audio chain. Never insert the CTCSS Output (from any CTCSS encoder board or source) to the microphone input of a radio. The radio's microphone audio stages will distort and attenuate the CTCSS signal (defeating the whole purpose) The most common place to connect the CTCSS Output to is just prior to the modulation stage in the transmitter. Typical connections would be: to the center of the deviation pot, to the varactor diode in the modulator circuit, or to the manufacturer's suggested connection point. This connection point for the CTCSS can vary from radio to radio. A schematic of the radio is very useful. Since the CTCSS Output from your sound card may be low impedance, you may have to install a series resistor to reduce the loading effects from the sound card (CTCSS) Output --- depending on the interface impedance. This is evident in the case of connecting to the center of a 10K deviation pot. In this case, a 10K series resistor will compensate for the impedance difference. In addition, a slight adjustment of the voice deviation may be required to compensate for the CTCSS Output circuit loading. The CTCSS encoders from ComSpec or PIEXX are easy to install and less than $50 . gb |
On 8 Mar 2005 19:41:49 -0800, "wb0gaz" wrote:
I need a PC program that would just tell a PC soundcard to generate a standard CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older FM amateur transceiver. tonegen http://www.nch.com.au/ -- ˛˛ ˛˛ Regards , SPAJKY ® \\.//_. mail addr. @ my site @ http://www.spajky.vze.com \°/ ".. long live & prosper.." - 3rd Anniversary running it: || "Tualatin OC-ed / BX-Slot1 / inaudible setup!" |
"wb0gaz" wrote in message
oups.com... This is probably not that complicated (I hope?!?) but I need a PC program that would just tell a PC soundcard to generate a standard CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older FM amateur transceiver. I don't want to find/buy/build a CTCSS module for it, and will have a PC handy. I imagine a WAV file could be created, but if there is some kind of software (perhaps a "function generator" program) that would be ideal, particularly if you could just give it the frequency in Hz or something like that, and get a steady sine wave out of the sound card. Very tks, 73 Dave WB0GAZ Two common suppliers for CTCSS encoding and decoding solutions are ComSpec and PIEXX. PIEXX http://www.piexx.com/cgi-bin/piexx.cgi?p=home. Com-Spec http://www.com-spec.com/index1.htm w9gb |
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"Dr. Anton T. Squeegee" wrote in message news:MPG.1c982a282a8f81319896e7@localhost... In article .com, says... This is probably not that complicated (I hope?!?) but I need a PC program that would just tell a PC soundcard to generate a standard CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older FM amateur transceiver. I don't want to find/buy/build a CTCSS module snippety What you describe is a lot like using a 40mm antiaircraft gun to shoot down a rubber-band powered model airplane. What happens when you suddenly need to use your sound card for something other than a PL encoder? $28.95 plus a little for shipping will get you a perfectly usable dedicated CTCSS encoder, as described at this link: Considering the fact that the last used pc I bought (p3-500) only cost $20 including a hard drive and sound card, I could have saved $8.95 by going the sound card route. Depending on how good your source of obsolete computers is, you can even get them for free. The pc can then also be used for PSK31 or any other use as well. As long a portability isn't an issue the pc can stand in for quite a bit of hardware. thanks, John. KC5DWD |
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