Lesson 1Network vs Analogue Systems: NVR vs DVR Architectures and Hybrid OptionsGrasp the differences between analogue and IP CCTV systems, covering DVR, NVR, and hybrid setups. Learn migration approaches, cabling effects, and decisions on retaining legacy coax or switching fully to network video for optimal performance.
Analog HD formats over coaxIP camera and NVR topologiesHybrid DVR and encoder optionsBandwidth and cabling implicationsMigration from DVR to full IPLesson 2Recorders and Storage: NVR Sizing, RAID Options, Retention Calculations, Write Endurance and HDD SelectionLearn to size NVRs based on channel numbers, bitrate, and retention periods. Compare RAID configurations, HDD varieties, and write endurance factors, while calculating storage requirements for various resolutions and frame rates in real-world scenarios.
Bitrate estimation per camera streamRetention and storage sizing formulasRAID 0, 1, 5, 6, and 10 trade-offsSurveillance-grade HDD vs desktop HDDWrite endurance and workload ratingsLesson 3Types of CCTV Cameras (Fixed, Varifocal, PTZ, Dome, Bullet) and Use-CasesCompare fixed, varifocal, PTZ, dome, and bullet cameras along with their ideal applications. Understand how form factor, environment, and risk levels guide camera selection for deterrence and vandalism resistance in diverse settings.
Fixed lens cameras for simple scenesVarifocal lenses for flexible framingPTZ cameras for active monitoringDome vs bullet form factor selectionVandal-resistant and covert optionsLesson 4Sensor Formats, Resolution, Frame Rates, and Low-Light Performance (1/2.8", 2MP, 4MP, 4K, WDR, IR Range)Examine how sensor size, resolution, and frame rates impact image quality and bandwidth usage. Cover low-light features like WDR, IR range, and noise reduction, balancing detail against storage and network constraints effectively.
Common sensor sizes and crop factors2MP, 4MP, 4K resolution pros and consFrame rate vs motion blur and storageTrue WDR vs digital WDR techniquesIR illumination range and limitationsLesson 5Choosing Realistic Models: Interpreting Datasheets, Vendor Reputations, Warranty and Support ConsiderationsBuild skills to read camera and NVR datasheets, assess actual performance, and steer clear of hype. Evaluate vendor reliability, firmware updates, warranties, and RMA procedures when selecting models for long-term dependability.
Key specs that truly affect performanceReading sensitivity and lux ratingsVerifying bitrate and codec claimsVendor firmware and security historyWarranty terms and RMA proceduresLesson 6Network Switches and PoE: PoE Standards (802.3af/at/bt), Budget Calculations, Managed vs Unmanaged SwitchesMaster PoE standards, power budgeting, and switch choices for CCTV networks. Differentiate managed and unmanaged switches, port capacities, uplink speeds, and redundancy features to ensure stable camera connections.
802.3af, 802.3at, 802.3bt power levelsCalculating PoE power budgetsPoE switch vs midspan injectorsManaged vs unmanaged switch featuresUplink capacity and oversubscriptionLesson 7Camera Features: PoE, ONVIF Compatibility, Motion Detection, Audio, Tamper DetectionExamine essential camera features influencing integration and ease of use, such as PoE, ONVIF, motion sensing, audio input, and tamper alerts. Determine when each is vital, optional, or redundant for specific projects.
PoE classes and power draw per cameraONVIF profiles and interoperabilityMotion detection and smart analyticsAudio input, output, and legal issuesTamper detection and event handlingLesson 8Accessory Selection: Mounts, Housings, Sunshields, Cable Glands, Surge Protectors, and Weatherproofing for External UnitsReview accessories for safeguarding and securing CCTV setups, including mounts, enclosures, sunshields, glands, and surge protectors. Apply weatherproofing techniques for durable outdoor installations in various conditions.
Wall, pole, and corner mount choicesOutdoor housings and sunshieldsCable glands and strain reliefSurge protectors and groundingWeatherproofing seals and ratingsLesson 9Power Supplies and Redundancy for CCTV: DC Injectors, Centralised Power Supplies, UPS Sizing for Recorders and Network EquipmentExplore power solutions for cameras and recorders, from DC injectors and PoE to UPS systems. Calculate UPS capacities and plan redundancy to maintain recording during power cuts and ensure system uptime.
Centralized vs local power suppliesDC distribution and voltage dropPoE injectors and midspan designUPS sizing for NVRs and switchesRedundant power and failover plansLesson 10Lens Selection, Field of View, and Focal Length Calculations for Given Coverage AreasUnderstand how focal length, sensor size, and lens types determine field of view and detail capture. Practise planning coverage, selecting angles, and performing lens calculations to fulfil identification, recognition, or overview needs.
Fixed vs varifocal lens characteristicsFocal length, FoV, and distance relationsSensor size impact on coverage widthCalculating pixels per foot or meterSelecting lenses for entrances and gates
