‰  NOW 30 WPM  ‰  TEXT IS FROM SEPTEMBER 2015 QST  PAGE 34 ‰

MODEL, AND INTRODUCE HAMS TO VERY SIMPLE CHAT OPERATION, NOT UNLIKE CELL
PHONE TEXTING OR INTERNET CHAT.  SEE THE LIST OF FSQ CALLING FREQUENCIES IN
TABLE 1.  COMPLEX VS. SIMPLE  IN RECENT YEARS, DIGITAL MODES HAVE BECOME
INCREASINGLY COMPLEX.  HAM RADIO SHOULD BE ABOUT FRIENDS CHATTING WITH EASY
TO USE EQUIPMENT, NOT FIGHTING WITH THE TECHNOLOGY, OR STRUGGLING TO
UNDERSTAND IT.  WHILE SOME RECENT COMPLEX MODES MAY BE TECHNICALLY
EXCELLENT, THAT EXCELLENCE COMES AT THE COST OF COMPLEXITY AND OPERATIONAL
PLEASURE THEY ARE NOT CONVERSATIONAL MODES.  THEY CAN BE VERY SLUGGISH
CAUSE DELAY, AND CAN REQUIRE MORE BANDWIDTH AND HIGHER SYMBOL RATES THAT
FURTHER ADD TO COMPLEXITY AND TO PROBLEMS ON HF PATHS.  FOR CHATTING, WE
NEED A VERY SLICK MODE, WITH NO ERROR CORRECTION OR OTHER DELAYS.  WE
DELIBERATELY EXPLOITED ROBUSTNESS THROUGH SIMPLICITY IN FSQ.  WE ELECTED TO
USE AN MFSK MULTI FREQUENCY SHIFT KEYING SYSTEM OF 33 TONES, OPERATING AT A
MAXIMUM OF NEARLY 6 BAUD, THAT PROVIDES NEARLY 60 WORDS PER MINUTE
THROUGHPUT.  OVERALL SIGNAL BANDWIDTH IS 300 HZ, BUT THE FILTER BANDWIDTH
PER TONE IS ONLY ABOUT 3 HZ, HENCE IT HAS EXCELLENT SENSITIVITY.  THE NEW
‰  END OF 30 WPM TEXT  ‰  QST DE W1AW  ƒ