ZQ4125 Automatic Point Frequency Distortion MeterDetailed product description：

The ZQ4125 automatic point frequency distortion meter can measure the voltage of 10Hz-100kHz signals and the distortion of 400Hz and 100Hz signals, with accurate measurement of fast bands. It is suitable for measuring voltage levels, low distortion, low distortion, especially suitable for radio and tape recorder production lines.

This instrument uses a proportional measurement circuit, so distortion measurement does not require full-scale calibration, and distortion measurement values are not affected by changes in input signal level.
By using multi-stage active filters in the fundamental wave suppression circuit, a larger suppression bandwidth can be obtained, thus enabling the measurement of distortion in signals containing jitter components, such as those in magnetic tape recorders. The filter automatic selection circuit built on the fundamental suppression circuit eliminates the need for frequency selection in the instrument. The instrument has two independent indicators (level meter and distortion meter), which can simultaneously measure signal level and distortion.

Main technical performance

Level measurement level range 0-100V frequency response 20Hz-50kHz ≤± 0.5dB 10Hz-100kHz ≤± 1dB
Accuracy not greater than ± 3% of the full-scale value
DC output 1V (at full scale)
Distortion measurement with a measurement frequency of 400Hz, 1000kHz, or any point within a measurement range of 0.01-30%
Input impedance 100K Ω± 2%, unbalanced parallel capacitance: ≤ 100PF

other
Power supply voltage 220V/110 ± 10% 50/60Hz