YS37C audio power supply

I. Overview
The YS37C audio power supply is an improved precision electric meter that serves as a matching power supply for the calibration device. It can also be used separately as a high-precision measurement and testing power supply for other instruments and meters. The improved audio power supply adopts a DC closed-loop feedback method to reduce the impact of load on output stability. Added current and voltage output levels for easy testing of low voltage and low current. Output constant voltage and stable current across all frequency bands.

2、 Technical performance
Frequency range: 40Hz to 10KHz; Frequency indication error: less than 0.1% ± 1 word (resolution below 1KHz 0.01Hz)
Frequency stability: less than 0.01% change every 3 minutes; Output indication error: less than 2% ± 1 word
Instability of amplifier output amplitude: At rated output, the variation should not exceed 0.02% every 3 minutes
When the output frequency is 50 ± 0.5Hz, the additional instability of the amplifier output amplitude does not change by more than 0.01% every 3 minutes
Amplifier amplitude output adjustment fineness: 0.01% of rated value; Output distortion: less than 0.3% between 45Hz and 3KHz, and less than 0.5% for the rest
Phase adjustment range: greater than ± 120 °; Phase adjustment fineness: less than 0.005 °; Phase instability: no more than 0.01 ° change every 3 minutes
Voltage regulation rate: When the input voltage is 50Hz and 220V ± 10%, the amplitude change of the output voltage is less than 0.02%
Power supply: 220V ± 10%, 50Hz. Power consumption: less than 500W. Operating environment temperature: 5-40 ℃, ensuring stable temperature of 20 ± 2 ℃
Relative humidity: 20% to 80% Volume: 159 × 480 × 480mm3 Weight: less than 25Kg