N 961

Ethernet interface, 2in
N961 Data Acquisition Card is a high-precision audio analyzer specifically designed for sound and vibration testing.
This product offers 2-channels of analog signal input, with each channel featuring a built-in IEPE constant current source excitation. It supports AC/DC coupling switching, enabling direct connection to IEPE sensors such as microphones and accelerometers. The device utilizes an Ethernet communication interface, facilitating high-speed data transmission based on the TCP/IP protocol. Additionally, it supports real-time waveform display on the host computer and has a second-level data buffering capability.
In terms of power supply, the N961 supports Power over Ethernet (PoE)(IEEE802.3af) and a wide range of external DC power inputs from 9 to 24 volts. It features dual-channel redundant power supply with seamless switching capability, ensuring continuous and stable operation of the device in complex testing environments.

Specifications

Parameters
Number of analog input channels	2-channels
IEPE channel	2-channels （ built into the acquisition front-end ）
IEPE power supply	4mA/24V
Communication interface	100 Mbps Ethernet port
Interface type	BNC
Product dimensions (mm)	9633140（WHL）
Operating temperature	-20℃ - 50℃
Net weight (kg)	0.32
Packaging dimensions (mm)	25016565
Packaging weight (kg)	0.53

AI Specifications

AI Parameters
ADC accuracy	24 Bit
ADC type	Δ-Σ
Sample rate range	48k/96k
Data transmission mode	DMA
Input voltage range	+/- 3Vrms
Gain error	+/- 0.02dB
Input impedance	Between the positive input terminal and ground:100k ohm
Flatness	1Hz - 20kHz 3dB, 20Hz - 20kHz 0.1dB, 20Hz - 50kHz 0.03dB

AI Idle Noise (uVrms)
Sample Rate	fs=48kS/s	fs=96kS/s
Typical Value	9.2	8.3
PS：[1]Short circuit source impedance < 50 ohm，Working temperature 23±5℃

AI SNR (dB)
Sample Rate	fs=48kS/s	fs=96kS/s
Maximum Value	98	94
PS：[1]Differential input, AC coupled, input signal 1kHz sine wave, 0dBFS (3Vrms) [2]The bandwidths are 22.4k, 45k, and 51k, respectively [3]Linear weighting, DR testing method

AI Dynamic Range (dB)
Sample Rate	fs=48kS/s	fs=96kS/s
Minimum Value	98	93
PS：[1]Differential input, AC coupled, input signal is a 1kHz sine wave at -1dBFS (2.67Vrms) [2]The bandwidths are 22.4k, 45k, and 51k, respectively [3]Linear weighting, DR testing method

AI THD+N (dB)
Sample Rate	fs=48kS/s	fs=96kS/s
Maximum Value	-98	-94
PS：[1]Differential input, AC coupled, input signal is a 1kHz sine wave at -1dBFS (2.67Vrms) [2]The bandwidths are 22.4k, 45k, and 51k, respectively [3]Linear weighting

AI THD (dB)
Sample Rate	fs=48kS/s	fs=96kS/s
Maximum Value	-114	-114
PS：[1]Differential input, AC coupled, input signal is a 1kHz sine wave at -1dBFS (2.67Vrms) [2]The bandwidths are 22.4k, 45k, and 51k, respectively [3]Linear weighting, DR testing method

AI Cross Talk (dB)
Sample Rate	fs=48kS/s	fs=96kS/s
Maximum Value	-98	-93
PS：[1]Differential input, AC coupled, input signal is a 1kHz sine wave at -1dBFS (5.67Vrms)，The short-circuit source at the no-signal terminal is less than 50 ohms [2]The bandwidths are 22.4k, 45k, and 90k, respectively [3]Linear weighting