=  NOW 20 WPM  =  TEXT IS FROM JUNE 2022 QST  PAGE 49 =

DESIRED DIGITAL MODES BECAUSE YOU HAVE REACHED THE LIMIT ON THE NUMBER OF
RADIOS AND ANTENNAS YOU CAN INSTALL, THE DVMEGA CAST IS TO BE CONSIDERED.
HECKITS TWO TONE GENERATOR REVIEWED BY PAUL DANZER, N1II N1II ARRL. NET ITS
STANDARD TO TEST TRANSMITTERS AND AMPLIFIERS BY USING AN AUDIO SIGNAL
GENERATOR THAT IS CAPABLE OF PUTTING OUT TWO AUDIO TONES WITH EQUAL
AMPLITUDE.  WITH A SINGLE AUDIO SIGNAL INPUT, YOU CAN USE A SCOPE TO SEE
THE SHAPE AND DISTORTIONS, IF ANY, AND A SPECTRUM ANALYZER ON THE OUTPUT
WILL ONLY SHOW HARMONIC DISTORTION.  THIS WILL BE SEEN AS ENERGY AT
MULTIPLES OF THE INPUT AUDIO FREQUENCY.  HOWEVER, WITH TWO FREQUENCIES AS
THE INPUT YOU CAN MEASURE THE IMD, OR INTERMODULATION DISTORTION.  THIS IS
MORE REPRESENTATIVE OF THE UNIT UNDER TEST IN REAL LIFE USE.  THIS HECKITS
=  END OF 20 WPM TEXT  =  QST DE W1AW  <