U 920G

4in，PDM
U 920G is a PDM analog source specifically designed for electroacoustic testing. With its excellent electrical characteristics and superior cost-effectiveness, it is highly suitable for testing digital PDM demodulators and can form a closed loop with the U926 or U920A.

Specifications

Parameters
Full-load Power Consumption	5V/400mA
Number of USB Shuttle Channels	4
External Analog Channels（Default upon Power-on	4
PDM Voltage	1.8V
Bus	BNC
Product dimension mm	9633140
Working Temperature	-20℃ - 50℃

AO Channel Characteristic Parameters

Idle noise（dBFS)
Sample Rate	fs=48kS/s
Typical Value	-73dBFS
PS：[1]Input signal is 0Vrms or input is short-circuited [2]Weighting Method: A-weighted

THD (dB)
Sample Rate	fs=48kS/s
Typical Value	-81dB
PS：[1]Single-ended input, AC-coupled. Input signal is a 1kHz sine wave at 0.5Vrms (digital signal level at -10dBFS) [2]Weighting Method: A-weighted

THD+N (dB)
Sample Rate	fs=48kS/s
Typical Value	-78dB
PS：[1]Single-ended input, AC-coupled. Input signal is a 1kHz sine wave at 0.5Vrms (digital signal level at -10dBFS) [2]Weighting Method: A-weighted

Cross talk（dB）
Sample Rate	fs=48kS/s
Typical Value	80dB
PS：[1]Single-ended input, AC-coupled. Input signal is a 1kHz sine wave at 0.5Vrms (digital signal level at -10dBFS) [2]Weighting Method: A-weighted

PS：

1.The maximum effective input is 1Vrms (digital signal level at -4dBFS). Inputs higher than this value may result in significant distortion

2.The specifications for 3.5mm input and Shuttle input are the same

3.Calibration values are based on a 1kHz sine wave input with an input amplitude of 0.5VRMS, collected at the digital signal end as -10dBFS

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