Blue Star Limited manufactures 9 kHz to 2.51 GHz Signal Generator. Blue Star Limited offers different types of Multi Source Generator, Communication Service Monitor, Radio Test Set, etc. 9 kHz to 2.51 GHz Signal Generator is available in three types, comes with linear and logarithmic sweep mode. This 9 kHz to 2.51 GHz Signal Generator is a sine, triangular and square wave two-tone modulation source.