CCTV Software & Surveillance Tools Here are a few CCTV tools and resources to help configure the right SCW Surveillance system for you View Sample Floorplans Try our Floorplan iPad App Use our Record Time Calculator Consult our Knowledge Base New To Surveillance Systems? If you are new to CCTV and security cameras, then you probably are wondering how you can go about selecting the right cameras and DVRs for your system. Use our security camera lens calculator to determine the right lens type for each camera of your surveillance system. This tool is free and helps you put things into perspective. Use our DVR/NVR Hard Drive calculator to determine what size hard drive your system needs to achieve your desired record time.