This text is a user's manual for the Trimble Catalyst DA1 antenna, oriented mainly to engineering students for academic purposes, and also aimed at professionals in the field who wish to learn how to use this instrument. For this reason, the text includes both basic and advanced aspects. Trimble Catalyst consists of a low-cost GNSS antenna that connects to an Android device and uses a single receiver to carry out the project, since it works with an absolute positioning method and with real-time correction services. This and other features make Catalyst an innovative and versatile product, suitable for any type of user.The Trimble Catalyst DA1 antenna is capable of delivering coordinates with high accuracy, capturing precise information quickly after connecting and configuring it to any Android device that meets the technical requirements, whether cell phone or tablet. Trimble offers different types of subscriptions depending on the accuracy requirements of the user or the project to be carried out.