S907E Fully automatic distortion measurement instrumentDetailed product description：

The S907E automatic distortion meter can test the total harmonic distortion of audio signals with fundamental frequencies of 310-450Hz and 850-1150Hz. No need for initial benchmark calibration, it can automatically read directly.  

The S907E fully automatic distortion measurement instrument has rich usage functions in the range of 10Hz-100kHz and can be used as a sensitive voltmeter to measure signal voltage or level (0.775V=0dB). It can be used as a frequency counter in the range of 10Hz-2MHz.  
LCD display, automatic/manual range, easy to use

Distortion measurement		Voltage/Level Measurement	frequency measurement
Fundamental frequency; 310-450Hz ; 850－1150Hz		Frequency range: 20Hz-100KHz	Frequency measurement range: 10Hz-2MHz
Measurement range 0.03% -30% divided into six measuring ranges		Measurement range: 10mv-300Vrms divided into nine measurement ranges	10Hz-1.5MHz input sensitivity: ≤ 30mV
Input voltage range 10mv-300Vrms		Input voltage range 10mv-300Vrms	1.5MHz-2MHz input sensitivity: ≤ 50mV
Measurement accuracy ≤± 5% (Full scale) ± 0.01%		Accuracy ± 3% (full scale)	Frequency display accuracy: 7 × 10-5± 1 word