Features:
* AC-DC-AC frequency conversion technology.
* Digital wave synthesis, wave feed-back technology, low power distortion.
* High speed 12 bits A/D sampling technology,exactly display Voltage.
* Controlled and tested by 16 bits MCU, which has high automation.
* Insulation for power output to make test safely and steady.
* Protection for over hot and thundering voltage and current.
* Input by keyboard, big/small adjustment, fast parameter set-up.
* Provide a very stable and pure sine-wave supply for measurement

Specifications:
* Output frequency range: 45-65Hz ±(0.004+0.001/reading+1 digit)
* Total voltage distortion: ≤0.6%
* Voltage stability: ≤0.1%/30min
* Load adjust rate: ≤0.1%
* Frequency stability: ≤0.05%/30min
* Zero output impedance, equivalent resistance ≤0.1.
* Maximal current output: 0-150V=4.2A, 0-300V=2.1A