‰  NOW 13 WPM  ‰  TEXT IS FROM OCTOBER 2017 QST  PAGE 34  ‰

INCLUDE T/R SWITCHING, FREQUENCY AND MODE SETTING, AND OPTIONS SUCH AS
SPLIT OPERATION AND AUTOMATIC DOPPLER COMPENSATION FOR THE EME PATH.  THE
CAT CONTROL PORTION OF OUR SOFTWARE MAKES USE OF AN OPEN SOURCE LIBRARY
KNOWN AS HAMLIB, TO WHICH MANY ACTIVE HAMS HAVE CONTRIBUTED.  MANY
CAPABILITIES OF WSJT X DEPEND ON THE SOFTWARES USE OF SIGNAL DETECTION
BANDWIDTHS OF NO MORE THAN A FEW HERTZ.  THIS PUTS A SPECIAL PREMIUM ON
FREQUENCY ACCURACY AND STABILITY.  WSJT X PROVIDES TOOLS THAT ENABLE
ƒ  QST DE W1AW  ‰
ACCURATE FREQUENCY CALIBRATION OF YOUR RADIO, AS WELL AS PRECISE FREQUENCY
MEASUREMENT OF ON THE AIR SIGNALS.  THE CALIBRATION PROCEDURE WORKS BY
AUTOMATICALLY CYCLING THROUGH A SERIES OF PRESET FREQUENCIES OF CARRIER
BASED SIGNALS AT RELIABLY KNOWN FREQUENCIES.  WE FIND THAT MAJOR CITY AM
BROADCAST STATIONS CAN SERVE AS FREQUENCY CALIBRATORS AT THE LOW FREQUENCY
END OF THE SPECTRUM, AND IN NORTH AMERICA WE USE THE STANDARD TIME AND
‰  END OF 13 WPM TEXT  ‰  QST DE W1AW  ƒ