The Rigol DG821 is a 25 MHz function and arbitrary waveform generator that consolidates multiple instrument capabilities into a single, cost-effective platform. Built for engineering, research, and educational applications, it delivers precise waveform generation through 16-bit vertical resolution and sample rates up to 125 MSa/s. The instrument supports a standard memory depth of 2 Mpts, upgradeable to 8 Mpts, and features SiFi II technology for distortion-free arbitrary waveform generation. A unique software-key upgrade pathway allows expansion from single-channel to dual-channel operation, effectively providing two independent signal sources without performance penalty.
Technical Specifications
• Bandwidth: 25 MHz
• Channels: 1 (upgradeable to 2 via software key)
• Sample Rate: Up to 125 MSa/s
• Vertical Resolution: 16 bits
• Memory Depth: 2 Mpts standard; 8 Mpts optional
• Frequency Stability: ±1 ppm
• Phase Noise: -105 dBc/Hz
• Output Amplitude: 1 mVpp to 10 Vpp into 50 Ω (1 MHz); 5 Vpp at 25 MHz; 1 mVpp–10 Vpp high impedance
• Output Impedance: 50 Ω
• Harmonic Generator: Up to 8th order
• Frequency Counter: 7 digits/s, 240 MHz bandwidth
• Arbitrary Waveforms: 160 built-in waveforms; sequence editing supported
• Modulation: AM, FM, PM (analog); ASK, FSK, PSK, PWM (digital)
• Display: 4.3″ TFT color touchscreen
– Key Features
• SiFi II point-to-point waveform generation eliminates signal distortion
• Fanless design ensures silent operation
• Dual-channel upgrade via software activation preserves single-channel performance characteristics
• PC software enables waveform generation and editing
• Built-in noise, pulse, and harmonic generation capabilities
– Typical Applications
Engineering design verification, medical electronics testing, automotive electronics development, and mathematical signal processing.
– Compatibility & Integration
The DG821 integrates function generation, arbitrary waveform synthesis, noise generation, pulse generation, harmonic synthesis, analog/digital modulation, and frequency measurement into one instrument.
