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. Discover migration approaches, cabling effects, and decisions on retaining old coax cables or fully switching to network video for better 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-CasesExamine fixed, varifocal, PTZ, dome, and bullet cameras along with their ideal applications. Understand how design, surroundings, and threat levels guide camera selection for effective deterrence and vandalism resistance.
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)Investigate how sensor size, resolution, and frame rates impact image clarity and data usage. Master low-light techniques like WDR, IR distance, 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 expertise in reading camera and NVR datasheets, assessing true capabilities, and steering clear of hype. Weigh vendor reliability, firmware updates, warranties, and return processes when picking models for long-term use.
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 SwitchesStudy PoE standards, power allocations, and switch choices for CCTV networks. Differentiate managed and unmanaged switches, port capacities, uplink speeds, and backup features to guarantee 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 DetectionEvaluate vital camera attributes influencing setup and operation, such as PoE, ONVIF, motion sensing, audio input, and tamper alerts. Determine when each is crucial, 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 UnitsAssess accessories that safeguard and secure CCTV setups, including mounts, enclosures, sunshields, glands, and surge guards. Apply weatherproofing methods for durable outdoor installations in varying climates.
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 EquipmentExamine power solutions for cameras and recorders, featuring DC supplies, PoE injectors, and UPS units. Calculate UPS capacities and plan backups to sustain recording through power cuts reliably.
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 dimensions, and lens styles shape field of view and subject sharpness. Practise area planning, angle choices, and lens computations to fulfil identification, recognition, or broad 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
