The National Instruments PCI-5122EX Digitizer is a sophisticated oscilloscope device designed for flexible, software-based instrumentation capable of performing both frequency and time domain measurements. This model is an enhanced version of the PCI-5122, featuring improved specifications while being recommended for legacy applications, as National Instruments promotes the latest PXIe devices for new designs. The PCI-5122EX is equipped with two analog input channels, utilizing BNC connectors, and offers multiple input coupling options including AC, DC, and ground (GND), selectable via software. The digitizer provides two software-selectable input impedance settings of 50 Ω ± 2.0% or 1 MΩ ± 0.75%, which incorporates a parallel 29 pF capacitor when 1 MΩ impedance is utilized. With a resolution of 14 bits, the PCI-5122EX effectively filters noise frequencies up to 20 MHz through a 2-pole Bessel filter. Sample clock sources include both internal and external options, with the internal VCXO providing a sampling rate ranging from 1.526 kS/s to 100 MS/s, while the external CLK IN source, accessible via a front panel SMB connector, operates within a 30 – 105 MHz frequency range. Additionally, the device features a bidirectional AUX I/O channel that utilizes a mini-circular DIN connector, with a maximum frequency of 25 MHz, input impedance of 150 kΩ, and 50 Ω output impedance. The PCI-5122EX has dimensions of 14.0 x 0.8 x 4.4 inches and weighs 16.0 ounces, supported by a 2-3 year warranty. Comprehensive user and maintenance manuals are available for download. For pricing information, please contact a sales representative.