2-Input/2-Output IF Transceiver Device—The PCI‑5640 is a cost-effective IF transceiver with power and flexibility that make it ideally suited for teaching and research involving software defined radio and other communications applications. You can install the PCI‑5640 in a desktop PC, and you can fully program it with LabVIEW. The PCI‑5640 offers multiple options for processing received signals or preparing signals for transmission.