Oscillators are used in both analog and digital designs. They work as clocks for digital designs or local oscillators (LO) to reach the target RF frequency through up- or downconversion.
Oscillators have various different topologies, ranging from crystal synthesizer based PLL designs to DDS techniques. Either way, the output signals have to be characterized and tested to make sure the device or module meets the design specifications for clock accuracy, signal purity and stability.
Rohde & Schwarz provides solutions to test any oscillator using oscilloscopes, spectrum analyzers, phase noise analyzers and VCO testers.