Additional Features: Frequency range: 0.252 to 1030 MHz Lowest SSB phase noise and spurious Highest output power Lowest residual FM AM, FM, pulse modulation < -105 dBc nonharmonic spurious up to 1 GHz allows spurious rejection tests to be fully automated with confidence ±1.0 dB output level accuracy down to -127 dBm Internal modulation synthesizer with coverage up to 400 kHz and two-tone capability -136 dBc/Hz SSB phase noise at 20 kHz offset at 1 GHz The Agilent 8644B represents the highest overall performance in the Agilent line of 1 GHz and 2 GHz signal generators. An advanced internal modulation synthesizer provides coverage to 400 kHz and two-tone capability with the selection of sine, square, triangle, sawtooth, and white Gaussian noise waveforms.