= NOW 25 WPM = TEXT IS FROM MAY 2021 QST PAGE 66 = AT THE LAB. THE POTENTIAL IS REALLY EXCITING, HE SAID. AS ALWAYS, WE APPRECIATE THE SUPPORT THAT ULRICH ROHDE HAS GIVEN TO THE LAB OVER THE PAST SEVERAL DECADES. ROHDE SAID VECTOR SIGNAL GENERATORS ARE THE LOGICAL SUCCESSORS TO THE OLDER AM/FM MODULATION CAPABLE SIGNAL GENERATORS AND HAVE PRACTICALLY UNLIMITED CAPABILITY. FOR SOME OF THE TESTS REQUIRED TO CHARACTERIZE A SOFTWARE DEFINED RADIO SDR, WE NEED DIFFERENT TEST EQUIPMENT, HE SAID. ROHDE NOTED THAT THE SMBV100A HAS A BUILT IN ARBITRARY WAVEFORM GENERATOR CAPABLE OF OPERATING UP TO 6 GHZ, WITH MANY COMPLEX SIGNALS IN ITS LIBRARY, AND ALSO HAS THE FAMILIAR AM/FM SIMPLE MODE. GOING FROM ANALOG TO DIGITAL SDRS, LARGE SIGNAL BEHAVIOR IS BEST DETERMINED WITH SPECIAL MULTI CARRIER SIGNALS, ROHDE SAID. INSTEAD OF A TWO TONE TEST SIGNAL FOR, SAY, MEASURING IF CHARACTERISTICS, THE SMBV100A CAN GENERATE UP TO 30 DISCRETE TONES. ROHDE SAID THE SMBV100A CAN PRODUCE ANY SIGNAL AS = END OF 25 WPM TEXT = QST DE W1AW <