... frequency up to 300MHz . DDS SIGNAL GENERATOR HG2461 IV - DDS RF SIGNAL GENERATORFeature. Signal frequency up to 300MHz. DDS Technology provides ... for a superior signal with lowdistortion and high stability. Both RF output and function output. 3.5'' QVGA color LCD ... , smart metal case. 1uHz frequency resolution. RS 232 interface and USB, GPIB optional. Versatile modulationAM, FM, PM, FSK, PSK, Sweep, ...