You must successfully set up communication between the host and the radio before you can work with the Support Package for RTL-SDR Radio. Follow the steps outlined in RTL-SDR Support Package Hardware Setup. After you have successfully installed the support package, see What To Do After Installation
Install Support Package for RTL-SDR Radio
How to install the Communications Toolbox™ Support Package for RTL-SDR Radio.
RTL-SDR Support Package Hardware Setup
Setting up your RTL-SDR Radio hardware.
Configure Multiple RTL-SDR Radios
How to configure multiple radios.
How to uninstall the Support Package for RTL-SDR Radio.
Find, run, and install add-ons, including optional features, apps, toolboxes, and support packages
Resolve issues encountered while installing or using the features of the support package.