= NOW 13 WPM = TEXT IS FROM APRIL 2020 QST PAGE 32 = QST DE W1AW < THE CORRESPONDING MODES IN COLUMN THREE HAVE THRESHOLD SENSITIVITIES LISTED IN COLUMN FOUR. FOR EXAMPLE, THE THRESHOLD SNR IN THE STANDARD 2500 HZ BANDWIDTH FOR FT8 IS 20 DB. SO, WE FIRST CONVERT THE SNR IN 2500 HZ TO SNR IN 1 HZ BY ADDING 10LOG 2500/1 34 DB TO GET THE SNR IN A 1 HZ BANDWIDTH OF 14 DB, SHOWN IN COLUMN FOUR OF THE TABLE. THAT THRESHOLD SENSITIVITY EXTENDS TO THE LIGHT BLUE COLOR RANGE OF THE TABLE. FT8 RANGE COVERAGE THEREFORE INCLUDES ANYTHING IN THE LIGHT BLUE THROUGH PINK RANGE ON THE < QST DE W1AW = MAP. THE SAME GOES FOR EACH OF THE OTHER LISTED MODES. IN THE SAMPLE MAP IN FIGURE 1, SSB VOICE IS LIMITED TO PINK AND RED ONLY, WHILE THE SUBSEQUENT MODE COLORS IN TABLE 1 INCLUDE ALL PREVIOUS COLORS. FT4 COVERAGE, FOR EXAMPLE, INCLUDES LIGHT BLUE THROUGH PINK, AND WSPR COVERAGE INCLUDES THE WHOLE COLOR MAP, BLUE THROUGH PINK. REMEMBER THAT THE COLOR CORRESPONDENCE IS APPROXIMATE AND DEPENDS ON FURTHER MODE SPECIFICS. YOU = END OF 13 WPM TEXT = QST DE W1AW <