=  NOW 40 WPM  =  
TONE IS ADJUSTABLE USING THE FRONT PANEL BUTTONS, BUT THE FREQUENCY OF THE
SECOND TONE IS NOT.  ON THE LCD, THE SINC PULSE WAVEFORM LOOKS LIKE A
SPECTRUM DISPLAY OF A NARROW PULSE.  ON THE SCOPE IT IS A TRAIN OF SPECTRUM
LIKE PULSES.  A NUMBER OF EXPLANATIONS OF THE SINC WAVEFORM CAN BE FOUND BY
SEARCHING ONLINE.  IT APPEARS TO BE A WAVEFORM USED IN ADVANCED FILTER
DESIGN.  ANOTHER ADVANCED WAVEFORM, LORENZ PULSE, IS ALSO AVAILABLE.
FINALLY, THERE ARE 15 MEMORY CHANNELS TH

WHEN SET TO GENERATE A WAVEFORM, THE 2R4 INCH TFT COLOR LCD CONFIRMS THE
SETTINGS AND DISPLAYS THE SELECTED WAVEFORM.  IT ALSO SERVES AS THE READOUT
FOR THE MEASURING CAPABILITIES.  THE ENCLOSURE MEASURES APPROXIMATELY 2R7 X
7R6 X 7 INCHES.  EACH CHANNEL HAS ITS OWN BNC OUTPUT PORT, AND A SEPARATE
BNC CONNECTOR ON THE PANEL HANDLES THE MEASURING FUNCTIONS.  SEVERAL
SIMILAR MODELS ARE AVAILABLE FROM THIS MANUFACTURER.  THEY DIFFER MOSTLY IN
THE MAXIMUM SINE WAVE FREQUENCY THAT CAN BE GENERATED 15, 30, OR 60 MHZ.
HOWEVER, ALL VERSIONS ARE LIMITED TO 15 MHZ FOR A SQUARE WAVE AND 6 MHZ FOR
DIGITAL WAVEFORMS.  SIMILAR UNITS ARE AVAILABLE FROM ONLINE VENDORS IN
DIFFERENT PACKAGES UNDER SEVERAL BRAND NAMES.  THE FREQUENCY ACCURACY IS
STATED AS 20 PPM PARTS PER MILLION AND THE FREQUENCY STABILITY AS 1 PPM
OVER 3 HOURS.  WAVEFORM LENGTH IS 2,048 POINTS TOTAL NUMBER OF PIECES A
WAVEFORM CAN BE SYNTHESIZED FROM AND THE SAMPLING RATE 266 MS/S MILLION
SAMPLES PER SECOND.  VERTICAL RESOLUTION IS 14 BITS 214 16,384.  IN THE BOX
THE UNIT COMES AS A COMPLETE KIT.  THE TWO OUTPUT PROBES, ONE FOR EACH
CHANNEL, HAVE BNC CONNECTORS ON ONE END, AND RED AND BLACK INSULATED
ALLIGATOR CLIPS ON THE OTHER.  A THIRD LEAD WITH BNC CONNECTORS ON BOTH
ENDS IS INCLUDED.  THE AC POWER SUPPLY IS A WALL CUBE.  A USB CABLE IS
SUPPLIED FOR CONNECTION TO A PC, AND A MINIATURE CD ROM CONTAINS THE

COMPANION SOFTWARE.  THE REAR PANEL HAS AN ADDITIONAL CONNECTOR, BUT I
DIDNT SEE ANY INFORMATION ABOUT IT.  THE INSTRUCTION MANUAL IS VERY SPARSE,
FILLED MOSTLY WITH DETAILED SPECIFICATIONS.  INSTALLATION THE KOOLERTRON
SIGNAL GENERATOR REQUIRES NO INSTALLATION OR CALIBRATION TO USE IT
STANDALONE, CONTROLLING IT FROM THE FRONT PANEL.  PLUG THE POWER SUPPLY
INTO AN AC SOCKET, PRESS THE LARGE ON/OFF BUTTON LOWER LEFT, AND IT IS
READY TO USE.  YOU CAN CHOOSE LABELS IN ENGLISH OR A CHINESE DIALECT.  AS
SOMETIMES HAPPENS WITH SOFTWARE TRANSLATED FROM ANOTHER LANGUAGE INTO
ENGLISH, I HAD A LITTLE DIFFICULTY FIGURING OUT THE INSTALLATION AND
CONFIGURATION PROCESS.  FORTUNATELY, BURIED IN THE SOFTWARE WAS AN EMAIL
ADDRESS FOR SUPPORT.  AN EMAIL TO THAT ADDRESS BROUGHT A RESPONSE IN A DAY
OR TWO, ALONG WITH A LINK TO ANOTHER SET OF SOFTWARE.  NOTE THAT THE
INSTALLATION ROUTINE ALSO DOWNLOADS AND INSTALLS THE NATIONAL INSTRUMENTS
NI VISA 5R4 INSTRUMENT DRIVER, MICROSOFT SILVERLIGHT, AND MICROSOFT C,
WHICH TOOK QUITE A WHILE.  ONCE I SUCCEEDED WITH THE SOFTWARE INSTALLATION,
MY PC DISPLAYED THE SCREEN SHOWN IN FIGURE 6.  MORE INFORMATION ON MY
=  END OF 40 WPM TEXT  =  QST DE W1AW  <