Its high accuracy (38ppm)
The 6220 builds on Keithley's long-standing 220-series current-source architecture
Output ON/OFF Control
Low-frequency amplifiers
The Agilent 6613C also provides high-speed programming with under 4 millisecond response time
DG5071 Rigol Arbitrary Waveform Generator New Modules Its high accuracy (38ppm)Features: 70 MHz maximum sine output frequency, 1 GSa s sample rate, 14 bits resolution. Support frequency hopping (optional) with hopping interval up to 80 ns and arbitrary editing frequency hopping patterns. 14 standard waveform functions: Sine, Square, Ramp, Pules, Noise, Sinc, Exponential Rise, Exponential Fall, ECG, Gauss, Haversune, Lorentz, Dual Tones and DC. Lorentz,Dual Tones and DC. Rise Fall Time of the Pulse could be adjusted separately.