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The WF1974 is a Function Generator from NF Corporation. A function generator is a type of signal generator people use to generate many kinds of electrical waveforms over a range of frequencies. A function generator is a type of electronic test equipment that produces sine, triangular, square, and sawtooth shape waveforms. The user can make these waveforms single-shot, using a trigger source, or repetitive, based on use. This kind of signal generator uses integrated circuits to create waveforms. Function generators cover both RF and Microwave frequencies. 

• Frequency range: 0.01 µHz to 30 MHz
• 2 Channels
• Frequency accuracy: ± (3 ppm of setting + 2 pHz) (External frequency reference of 10 MHz usable.)
• Frequency resolution: 0.01 µHz
• Amplitude accuracy: ± (1% of amplitude setting [Vp-p] + 2 mVp-p)/open
• Phase setting resolution: 0.001° (setting range: –1800.000° to +1800.000°)
• Duty setting range: 0.0000% to 100.0000%; resolution: 0.0001%
• Pulse wave rising/falling time: 15.0 ns to 58.8 Ms; 3-digit resolution/0.1 ns
• Resolution of arbitrary waveform data amplitude:  16 bits
• Input/output signal ground independent of housing and signal ground between channels also insulated
• Output voltage under specified load impedance can be set and displayed
• External signals can be added and output
• Up to ten settings can be saved
• USB and GPIB interfaces
• LabVIEW driver included
• Power supply input for 90 V AC to 250 V AC enables worldwide use
• Waveform display (TFT color LCD with the QVGA high resolution)
• Continuous, burst/trigger/gate, internal/external modulation, sweep, and sequence oscillation
• Two independent channels,  two phases, constant frequency difference, constant frequency ratio, and differential output