HP / Agilent 33220A Function / Arbitrary Waveform Generator, 20 MHz

The Agilent/HP 33220A is a 20 MHz Function/Arbitrary Waveform Generator employing Direct Digital Synthesis (DDS) technology to deliver stable, accurate output signals across a broad spectrum of test and measurement applications. It generates standard waveforms—sine, square, ramp, triangle, noise, and DC—plus user-defined arbitrary waveforms with 14-bit resolution at 50 MSa/s sample rate. The instrument supports internal modulation (AM, FM, PM, FSK, PWM), linear and logarithmic sweeps, and burst mode operation, making it suitable for signal development, device characterization, and subsystem validation in RF, analog, and mixed-signal environments.

– Technical Specifications

Waveform Frequency & Distortion
• Sine: 1 µHz to 20 MHz; THD < 0.02% to 20 kHz, < 0.1% to 2 MHz, < 0.5% to 20 MHz
• Square: 1 µHz to 20 MHz; rise/fall time < 13 ns, overshoot < 2%
• Pulse: 500 µHz to 5 MHz; minimum width 20 ns, resolution 10 ns
• Ramp: up to 200 kHz linear
• Arbitrary: 1 µHz to 6 MHz, 2 to 64 k points, 14-bit resolution, 50 MSa/s

Output Levels
• Amplitude: 10 mVpp to 10 Vpp into 50 Ω; 20 mVpp to 20 Vpp open circuit
• DC Offset: ±2.5 V (50 Ω load), ±5 V (open circuit)
• Output Impedance: 50 Ω typical
• Output Isolation: 42 Vpk to earth maximum
• Overvoltage and short-circuit protected

Modulation & Sweep
• Internal AM, FM, PM, FSK, PWM modulation
• Linear and logarithmic sweeps: 1 ms to 500 s
• Burst mode with user-selectable cycle count

External Reference (Option 001)
• 10 MHz external clock synchronization, ±500 Hz lock range
• Input: 100 mVpp to 5 Vpp, high impedance
• Reference output: 10 MHz, 632 mVpp (0 dBm typical)

User Control
• Front-panel operation with direct access to major functions
• Parameter adjustment via knob or numeric keypad
• Voltage entry in Vpp, Vrms, dBm, or high/low levels
• Stores up to four user-defined arbitrary waveforms in non-volatile memory

– Key Features

• Direct Digital Synthesis for frequency and phase accuracy
• 14-bit amplitude resolution with variable edge timing on pulses
• Wide modulation and sweep capability for dynamic signal creation
• Optional external reference for phase-coherent multi-unit systems
• Intuitive front-panel interface for rapid parameter entry