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Ham Radio & Digital Techniques (Freddie Sulyma WB2GFZ, [email protected]) Traditional Computer/Rig Interfaces (Hardware) Quick review of basic RS-232 ports with configuration demonstration utilizing USB to RS-232 adapter Quick review of Computer Sound Card Virtual Computer/Rig Interfaces (Software) RS-232 capability via software applications o VSP Manager (Free Ware) o Com0com (Free Ware) Sound Card Interface via software application o Virtual Audio Cable ($30 Application) o VAcard (Freeware) Flexradio 1500 Basic intro with questions and answers Fldigi Digital Modem Program Page 1 of 10 Traditional Computer/Rig Interface (Sound & Control) Radio Computer Application eg. Fldigi Sound Card MIC TX Audio Head Phone RX Audio RS-232 Serial Port RX/TX Audio Rig Control Virtual Sound & Control Interface Radio Computer USB Cable Power SDR Radio Software Virtual Audio Pair Fldigi RX/TX Audio Digital Modem Software Virtual Audo Virtual RS-232 Applications Virtual RS-232 Pair Rig Control NOTE: The USB Cable is the only external interface between the Computer & Radio. The Virtual Audio & Virtual RS-232 are performed by internal software FIGURE 1 SDR Page 2 of 10 Serial Ports (RS-232, Hardware) Hardware: RS-232 - Traditional name for a series of standards for serial binary single-ended data and control signals connecting between a DTE (Data Terminal Equipment, eg. Computer) and a DCE (Data Circuitterminating Equipment, eg. Modem). Hardware RS-232 ports allow communications in both directions EIA232 communication function and connector types for a personal computer and modem. DCE devices are sometimes called "Data Communications Equipment" instead of Data Circuit-terminating Equipment. The voltage levels are not your typical logic voltage levels (eg. TTL 5 VDC). The voltage levels that represent 1s and 0s are between Positive and Negative voltages and ranges from +3 to +20V? and -3 to 20? VDC Page 3 of 10 Virtual RS232 Ports (Software): FIGURE 1 VSP Manager, RS-232 port allow communications in just in one directions VSP Manager (Freeware) http://k5fr.com/ddutilwiki/index.php?title=VSP_Manager Another Virtual Communication port application to consider is Com0com (Freeware) http://com0com.sourceforge.net/ Page 4 of 10 Virtual Audio Cable (VER 4.10, Software Download, $30): FIGURE 1 Virtual Audio Cable http://software.muzychenko.net/eng/vac.htm How To Setup Virtual Audio Cable (VAC) 4.0x with PowerSDR http://kc.flexradio.com/KnowledgebaseArticle50230.aspx VAcard - Software Audio Driver for Streaming Audio Applications (Freeware) http://www.datanab.com/audio/VAcard.htm Page 5 of 10 FlexRadio Systems http://www.flex-radio.com/ FIGURE 1 PowerSDR Application (VER 2.0.16) Using Fldigi with PowerSDR https://fedorahosted.org/fldigi/wiki/Documentation/HOWTO/PowerSDR 1. 2. 3. 4. 5. Installation VAC configuration VSPmgr configuration PowerSDR configuration Fldigi configuration Page 6 of 10 Fldigi (VER 3.20.32), Software By W1HKJ & Associates (Free Ware) http://www.w1hkj.com/Fldigi.html Beginners’ Guide To Fldigi file:///C:/Users/derf/fldigi.files/help/beginners.html Digital Modem Program for Linux, Free-BSD, OS X, Windows XP, W2K, and Vista Modes: CW AFCW (A2). DominoEX: (4,5,8,11,16,22) Hell: Feld Hell, Slow Hell, Feld Hell 5, Feld Hell 9, FSK Hell, FSK Hell-105, Hell 80 MFSK: from 4 to 64 tones MT63: 500, 1000, 2000 Hz bandwidths Olivia: – several flavors from 250 to 1000Hz bandwidth and with from 8 to 32 tones PSK: BPSK-31, QPSK-31, BPSK- 63, QPSK-63, BPSK- 125, QPSK 125, BPSK-250, QPSK-250 RTTY: 45 baud, 50-baud, 75-baud Thor: (4, 5, 8, 11, 16, 22) Throb: (1, 2, 4) WWV: calibration of soundcard oscillator) Frequency Analysis: measure the frequency of a remote signal that is transmitting a steady carrier. Tune: generates a continuous single frequency audio signal at the exact frequency to which the waterfall cursor has been set Digital Mode Information: http://www.wb8nut.com/digital.html Three main digital packages are: FLDIGI by David Freese, W1HKJ and Skip Teller, KH6TY: http://www.w1hkj.com/ HRD/DM780 by Simon Brown, HB9DRV: http://www.ham-radio-deluxe.com/ MULTIPSK by Patrick Lindecker, F6CTE: http://f6cte.free.fr/index_anglais.htm Patrick’s MULTIPSK is a great technical achievement. He offers the most sensitive modems and detection routines available and many modes (such as ALE-400) that are not available in any other software. The challenge is his user interface is very dense and can be tough on a first-time user. His philosophy is he wants all the controls in one place – and they are. FLDIGI is a very elegant package that is fully featured but simple to setup and use. HRD is not so simple, but is a great package and when used with DM780 is very fully featured. MULTIPSK offers the most sensitive modems and detection routines available and many modes (such as ALE-400) that are not available in any other software. The challenge is his user interface is very dense and can be tough on a first-time user. Page 7 of 10 Fldigi - Continued Using Fldigi with PowerSDR (VAC, VSPmgr, PowerSDR & Fldigi Configuration) https://fedorahosted.org/fldigi/wiki/Documentation/HOWTO/PowerSDR ___________________________________________________________ Additional Information: http://educationalradionet.blogspot.com/search?q=fldigi http://wb8nut.com/digital/ (Provides audio sound different modes) Page 8 of 10 Appendix A RETURN Page 9 of 10 Appendix B RETURN Page 10 of 10