<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head> <meta content="text/html; charset=ISO-8859-1" http-equiv="content-type"> <title>CWkeying</title></head> <body style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 204);" alink="#000099" link="#000099" vlink="#990099"> <h2><font size="5"><b>Using the FLdigi Qsk(Rt. Channel) function to key a transmitter</b></font></h2> <p style="text-align: center;"> <img style="width: 498px; height: 308px;" alt="" src="images/config-cw-qsk.png"></p> <small><small><font size="5"><small><small>Click on the Configure menu item to open the <span style="font-style: italic;">fldigi</span> configuration dialog. Click on the Modems tab and then </small></small></font></small></small><small><small><font size="5"><small><small>on the QSK tab.<br> <br> </small></small></font></small></small><small><small> <font size="5"><small><small></small></small></font></small></small><small><small><font size="5"><small><small> 1. set the Pre Timing and Post Timing to zero,</small></small></font> </small></small> <br> <small><small> <font size="5"><small><small> 2. activate the QSK feature by clicking "QSK on right channel"</small></small></font> </small></small> <br> <small><small> </small></small> <br> <small><small> <font size="5"><small><small>C</small></small></font></small></small><small><small><font size="5"><small><small>lick the CW tab and adjust the CW settings to your preference. Use the Test char and the Send continuous controls to ease the adjustment process.</small></small></font></small></small> <br> <small><small> </small></small> <br> <small><small> <font size="5"><small><small>FLdigi is now ready to generate a 1600 hertz CW tone on the</small></small></font></small></small><small><small><font size="5"><small><small> right channel of the stereo audio out of your sound card. </small></small></font></small></small><small><small><font size="5"><small><small>The left channel will be the normal raised cosine shaped CW wave form</small></small></font></small></small> <small><small><font size="5"><small><small>that you may use for your side tone.</small></small></font> </small></small> <br> <small><small> </small></small> <br> <small><small> <font size="5"><small><small>The following circuit may be used to take the FLdigi QSK OUT signal from the</small></small></font></small></small><small><small><font size="5"><small><small> right channel of your SOUND CARD to key your transmitter or a QSK circuit.<br> </small></small></font></small></small> <p style="text-align: center;"> <img style="width: 714px; height: 368px;" alt="" src="images/CWkeyingCircuit.jpg"> </p> <small><small><font size="5"><small><small>NOTE:</small></small></font> </small></small><br> <small><small> </small></small><br> <small><small> <font size="5"><small><small>L1 - Radio Shack has two items that may be used for this isolation transformer.<br> </small></small></font></small></small> <ul> <li><small><small><font size="5"><small><small>Catalog # 270-054</small></small></font></small></small></li> <li><small><small><font size="5"><small><small>Catalog # 273-1374</small></small></font></small></small></li> </ul> <p><small><small><font size="5"><small><small>Attach an audio cable from the Rt. Channel out of the your computer's SOUND CARD to the input of this </small></small></font><font size="5"><small><small>QSK INTERFACE CIRCUIT (input of L1).</small></small></font></small></small> </p> <p><small><small> <font size="5"><small><small>Attach another cable from the output of this circuit to your Rig's Keying Jack.</small></small></font> </small></small></p> <p><small><small> <font size="5"><small><small>Every CW tone that is generated by FLdigi is rectified by this FULL WAVE VOLTAGE DOUBLER circuit. The resultant voltage turns the Q1 transistor on and "grounds" the collector, which takes the RIG'S CW KEYING JACK to ground and "keys" the transmitter.</small></small></font></small></small></p><p>You can adjust the start and stop timing of the QSK circuit relative to the CW waveform with the "pre" and "post" settings.</p><p style="font-weight: bold; text-align: center;"><a href="index.html">Contents</a></p> <p><br> </p> <p> </p> </body></html>
