ZQ4126 Wideband Distortion Measuring InstrumentDetailed product description：

ZQ4126 wideband distortion measuring instrument can measure the nonlinear distortion of sinusoidal signals from 5Hz to 200kHz, with a minimum distortion of 0.03%. This instrument is also a wideband effective value voltmeter, with a frequency response of 2Hz to 1MHz. This instrument uses fast tuning methods to achieve frequency tuning, with LED numbers indicating the tuning frequency, making reading extremely convenient. Adopting a piano key switch, the operation is simple, convenient, and reliable. The instrument is equipped with a built-in oscilloscope, which can directly monitor frequency tuning and phase adjustment.
This instrument is a new generation distortion measurement device with a digital interface. It has stable performance, high reliability, and is easy to use. It is widely used in scientific research, teaching, postal and telecommunications, electronic audio manufacturing, and other fields.

Main technical performance

Distortion measurement

Frequency range: 5Hz~200kHz;
Distortion measurement range: 0.03% to 100%
Input voltage range: 300mV~300Vrms (unbalanced)
Distortion measurement error: 20Hz~20kHz: ± 10% (full scale) ± 0.01%, 5Hz~20Hz: 20kHz~200kHz: ± 20% (full scale)
Noise floor: not greater than 0.25mV during input short circuit (not greater than 0.3mV from 50Hz to 100Hz)
Fundamental filtering characteristic: not less than 80dB
Second harmonic loss: 20Hz-20kHz: ≤± 5%, 5Hz-200kHz: £ ± 15%

voltage measurement

Frequency range: 2Hz~1MHz
Voltage measurement range: 0.3mV~300Vrms (unbalanced)
Frequency characteristics (based on 1kHz): 20Hz-100kHz: not greater than ± 1dB, 2Hz-1MHz: not greater than 1.5dB, (+40dB;+50dB range for reference)
Input impedance: ³ 500 kW
Accuracy (1kHz): £ ± 5%
Inherent noise: not exceeding 50mV when the input terminal is short circuited

Power supply voltage: 198-242Vrms
Power consumption: approximately 25VA