The additional costs for the multi-sync functionality of the System 7001RC encompass a range of advanced features designed to enhance synchronization capabilities. This system allows for the simultaneous supervision and evaluation of two sync channels, ensuring optimal performance. It includes an automatic selection mechanism for time sources, seamlessly switching between primary and secondary options based on the current status. Configurable switching conditions enable customization to meet specific requirements, while the display provides real-time status updates of the sources. Furthermore, the system outputs sync-channel specific failure messages, enhancing troubleshooting efficiency. To fully utilize these capabilities, customized or signal-specific hardware is necessary for connecting external time signals, available only in conjunction with the 7020RC-XX board.