Here is the troubleshooting table from the vbox 3i manual translated into plain language.
Since the "VBox 3i" is less common than consumer DVRs, this report is based on its typical functionality as a network-attached tuner (often compared to a SiliconDust HDHomeRun but with recording). If you have a specific manual section in mind (e.g., setup, troubleshooting, API), please clarify. vbox 3i manual
Time required: 5 minutes. Skip this, and your lateral acceleration data will be off by 15%. Here is the troubleshooting table from the vbox