FUNCTION AND CAPABILITIES Function. The Wavetek Model 650 Variable Phase Synthesizer generates multiple waveforms at controlled phase angles. Each channel’s output signal maintains an absolutely fixed and precisely controllable phase relationship with the output signals of the other channels. Phase accuracy holds for fixed frequency, swept frequency, and swept phase operation. Digital generation SECTION I GENERAL DESCRIPTION of the signals guarantees fixed accuracy across the entire range of frequency and phase. Capabilities. The following additional capabilities of the 650 support its primary role as a phase Synthesizer and enable it to serve a wide range of phase and non-phase-related applications. Section 3 of this manual explains these capabilities In more detail.