National Instruments PXI-5122EX Digitizer

The NI PXI-5122EX is a 100 MHz, 8 MB/channel, 14-Bit Digitizer. This model comes with 2 simultaneously sampled channels at 100 MS/s. The PXI-5122EX is considered an ideal solution for a broad range of applications in communications, automotive, consumer electronics, scientific research, etc. The analog input performance of this digitizer is a function of its 14-bit ADC. This model offers a 62 dB signal-to-noise ratio (SNR) and a spurious-free dynamic range as high as 75 dBc. This digitizer also has the capability to stream information continuously from onboard memory to host memory for streaming to disk and lengthy acquisitions.

The National Instruments PXI-5122EX Digitizer supports 50 Ω or 1 MΩ software-selectable input impedance, seven trigger modes, and can be operated over a wide input range of 200 mVpp to 20 Vpp. As far as its triggering capabilities are concerned, the PXI-5122EX supports three trigger sources: software control, analog, and digital. There are pretrigger and posttrigger settings, which apply when the digitizer is utilized in numerous record mode.

The programmable DC offset feature incorporated in this digitizer amplifies the utilization of the entire 14-bits of vertical range. Moreover, the integrated self-calibration function of the PXI-5122EX guarantees measurement stability over the device’s complete operating temperature range. The deep acquisition memory provided enables this digitizer to acquire and handle around 4 million 14-bit samples per channel. According to National Instruments, there is no difference between the PXI-5122EX and PXI-5122, other than the PXI-5122EX Digitizer’s capability to enable the minimal addition of customized logic in the firmware by the user. All specifications are the same between the two digitizers.