‰  NOW 25 WPM  ‰  TEXT IS FROM SEPTEMBER 2015 QST  PAGE 44 ‰

FREQUENCY RELATIVE TO THE RADIO DIAL FREQUENCY.  THE KEY REQUIREMENT IS
THAT THE SOFTWARE MUST DISPLAY THE ACTUAL AUDIO FREQUENCY OF THE DECODED
SIGNAL AS A NUMERICAL VALUE.  I SUGGEST USING PSK31 MODE.  THE SOFTWARE
MUST HAVE THE AUTOMATIC FREQUENCY CONTROL AFC FUNCTION ACTIVE FOR THE
SELECTED MODE IN FLDIGI, AFC IS NOT ACTIVE IN CW MODE.  THE WATERFALL
PRESENTATION ALONE IS NOT SUFFICIENTLY ACCURATE FOR OUR PURPOSES.
CALIBRATING YOUR TRANSCEIVER TUNE YOUR RECEIVER TO ONE OF THE WWV
TRANSMISSIONS WHILE RECEIVING IN THE AM MODE.  WWV TRANSMITS STANDARD
FREQUENCY AND TIME SIGNALS ON 2R5 MHZ, 5 MHZ, 10 MHZ, 15 MHZ, AND 20 MHZ.
SELECT ONE OF THE FREQUENCIES THAT PROVIDES THE STRONGEST SIGNAL OR THE
BEST SIGNAL TO NOISE RATIO.  I INITIALLY USED 5 MHZ.  IT IS MOST IMPORTANT
THAT YOU USE THE AM MODE INITIALLY AS RECEIVER TUNING IS LESS CRITICAL IN
THIS MODE.  YOU WILL FIND WWV ALTERNATELY TRANSMITTING A PRECISE 500 HZ
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ