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The HP 8643A Signal Generator uses solid-state components accurate to within ±1.0 dB for setting levels. The HP 8643A comes standard with an advanced internal modulation synthesizer that provides coverage to 400 kHz and two-tone capability with the selection of sine, square, sawtooth, and white Gaussian noise waveforms. Specifications. Frequency Range: 0.252 to 1030 MHz, 2060 MHz (Option 002). Resolution: 0.01 Hz. SSB phase noise @ 1 GHz (20 kHz offset): -130 dBc/Hz. Output Level Range: +13 to –137 dBm. Resolution: 0.1 dB. Absolute accuracy: ±1 dB, output >= -127 dBm. Amplitude Modulation Depth: (@ <= +7 dBm) 0 to 100%. Resolution: 0.1%. Frequency Modulation Maximum peak deviation: 2 MHz, 1030 to 2060 MHz; 1 MHz, 515 to 1030 MHz. Resolution: 2.5% of setting. Pulse Modulation On/off ratio: >50 dB; >80 dB, >1030 MHz. Rise/fall time, 10 to 90%: <100 ns. Internal Modulation Source Waveforms and rates: Sine; white Gaussian noise (0.1 Hz to 400 kHz); Triangle, sawtooth, square (0.1 Hz to 50 kHz). Frequency Digital Sweep: Digitally stepped sweep over entire frequency range. Linear/log selection. 0.5 to 1000 s sweeps. Markers/Z-axis output: 3 markers available/Z-axis output nominally +5 V/X-axis output nominally 0 to 10 V. Interface: HP-IB (IEEE 488.2-1987). Options. 001: High-Stability Timebase. 002: 2 GHz Doubled Output. 004: Low-noise Option. 005: Electronic Attenuator (N/A with Option 002). 008: Pulse Modulation. 009: Specified VOR/ILS. 011: 2 GHz Internal Frequency Counter.
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