TZUTC: -0500   
   MSGID: 422.fidonet-ls_arrl@1:2320/33 28b32e63   
   PID: Synchronet 3.20a-Win32 master/a59d7d36d Apr 13 2023 MSC 1929   
   TID: SBBSecho 3.20-Win32 master/a59d7d36d Apr 13 2023 MSC 1929   
   BBSID: TBOLT   
   CHRS: CP437 2   
   From QRZ.Com, the Icom handout, and Part 97 Of The FCC Rules -   
   Ham Radio Glossary - An overview of amateur radio terms.   
      
   S/N   
   Signal To Noise Ratio   
      
   SAR   
   Search And Rescue   
      
   SASE   
   "Self Addressed, Stamped Envelope"; for more information, please see   
   QRZ's "QSL Corner" at http://www.qrz.com/qsl.html.   
      
   Scan   
   Continually sweeping frequencies looking for signals.   
      
   Scan Edge.   
   End and start frequencies for a scanning range.   
      
   Semi Duplex   
   An operation mode in which transmits and receives are   
   accomplished on different frequencies alternatively.   
      
   Sensitivity   
   Indicates how weak a signal the reciver will pick up.   
      
   Set mode.   
   An peration mode used for radio to set less frequently used control   
   features.   
      
   SFI   
   See "Solar Flux Index"   
      
   SHF   
   (super-high frequency). The frequency range 3-30 GHz.   
      
   Simplex   
   Communicating directly from radio to radio (without the use of an   
   intermediary repeater). This term is normally used in the context of   
   environments that frequently use repeaters. With simplex, the frequency   
   is identical to all stations on that frequency.   
      
   Simplex Repeater   
   A radio that has a digital audio store-and-forward relay system. Produces   
   results similar to that of a conventional repeater.   
      
   Slug   
   A short, cylindrical unit that is inserted into a Bird® Wattmeter (or   
   similar) that allows the unit to read power (watts) for a particular   
   frequency range. A slug always has a finite frequency range and a maximum   
   power rating. By swapping out different slugs, the wattmeter can be used   
   for many different frequencies and power ranges.   
      
   Skywarn   
   Trained volunteer severe storm spotters for the National Weather Service.   
      
   SMA   
   Sub-Minature a connector)   
   A type of antenna connector used on VHF/UHF portable rigs, such HT's.   
      
   Solar Flux Index   
   A measurement of radio emission from the sun. HF propagation conditions   
   are considered good when this number is high and the A- and K-index numbers   
   are low.   
      
   SP   
   Speaker   
      
   Space station   
   An amateur station located more than 50 km above the Earth's surface.   
       
   Space telemetry   
   A one-way transmission from a space station of measurements made from the   
   measuring instruments in a spacecraft, including those relating to the   
   functioning of the spacecraft.   
       
   Special Event   
   A radio operating event, usually on HF, in which a group or organization   
   celebrates an event or holiday by making contacts and offering special QSL   
   cards or certificates to confirm the contact. Ham Radio magazines, such as   
   QST, usually publish a monthly list of Special Events.   
      
   Split   
   A mode in which the transmit and receive frequency is different.   
      
   Spurious emission   
   An emission, on frequencies outside the necessary bandwidth of a   
   transmission, the level of which may be reduced without affecting the   
   information being transmitted.   
      
   SQL   
   Squelch. A function muting audio output for set conditions.   
      
   SSB   
   Single Sideband   
      
   SSTV   
   Slow Scan Television. Graphics Communication using narrow bandwidth.   
      
   Straight Key   
   A device for sending Morse Code, consisting of a single arm making contact   
   with another point to complete a circuit and key a transmitter (thanks to   
   WD5CTQ).   
      
   Switching Power Supply   
   A power supply that uses switching transistors (on-off) to increase the   
   efficiency of the power conversion, rather than the simple   
   transformer/rectifier design of traditional power supplies.   
      
   SWL   
   "Shortwave Listener"; one who enjoys listening to shortwave transmissions,   
   without intention of transmitting.   
      
   SWR   
   "Standing Wave Ratio"; an indication of how well matched an antenna is to   
   its transmitter. A "one to one" (1:1) SWR indicates a perfect match.   
   Anything less than 1:1 (i.e., 2:1) indicates that the antenna is not   
   perfectly resonant for the transmit frequency, and that some RF power is   
   being reflected back down the transmission line into the transmitter. In   
   general, any SWR which is 3:1 or better is acceptable.   
   --- SBBSecho 3.20-Win32   
    * Origin: The Thunderbolt BBS - Little Rock, Arkansas (1:2320/33)   
   SEEN-BY: 1/123 15/0 90/1 105/81 106/201 116/17 18 123/10 131 153/7715   
   SEEN-BY: 154/10 30 40 50 700 218/700 840 220/70 90 221/6 226/17 18   
   SEEN-BY: 226/30 227/114 229/110 112 113 206 307 317 426 428 470 664   
   SEEN-BY: 229/700 266/512 267/800 282/1038 301/1 317/3 320/219 322/757   
   SEEN-BY: 342/200 396/45 460/58 633/267 280 712/133 620 848 770/1 100   
   SEEN-BY: 770/340 772/210 220 230 2320/0 33 105 304 401 3634/12   
   PATH: 2320/33 105 154/10 221/6 218/840 770/1 712/848 229/426