Lesson 1Network vs analogue systems: NVR vs DVR setups and hybrid choicesGrasp the differences between analogue and IP CCTV, covering DVR, NVR, and hybrid setups. Discover migration approaches, cabling effects, and when to retain old coax or switch completely to network video in local installations.
Analogue HD formats over coaxIP camera and NVR setupsHybrid DVR and encoder choicesBandwidth and cabling effectsMigration from DVR to full IPLesson 2Recorders and storage: NVR sizing, RAID choices, retention calculations, write endurance and HDD selectionLearn to size NVRs for channel numbers, bitrate, and retention periods. Compare RAID levels, HDD types, and write endurance, plus calculate storage requirements for various resolutions and frame rates in real-world use.
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 and their ideal applications. Understand how form, environment, and risk level guide camera selection, deterrence, and vandalism resistance in Namibian sites.
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 format, resolution, and frame rate impact image quality and bandwidth. Master low-light ideas like WDR, IR range, and noise, balancing detail with storage and network constraints for local needs.
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, compare actual performance, and dodge marketing hype. Assess vendor reputation, firmware support, warranties, and RMA processes when picking models for Namibian reliability.
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 budgets, and switch choices for CCTV networks. Compare managed and unmanaged switches, port numbers, uplink capacity, and redundancy for dependable camera links in varied environments.
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 key camera features affecting integration and ease of use, like PoE, ONVIF, motion detection, audio, and tamper alerts. Know when each is vital, optional, or unneeded for projects in Namibia.
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 that safeguard and secure CCTV setups, including mounts, housings, sunshields, glands, and surge protection. Learn weatherproofing methods for reliable outdoor use in harsh Namibian weather.
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 choices for cameras and recorders, covering DC supplies, PoE injectors, and UPS systems. Learn to size UPS capacity and plan redundancy to maintain recording during power cuts common in Namibia.
Centralised 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 type influence field of view and target detail. Practise coverage planning, angle choice, and basic lens calculations to meet identification, recognition, or overview needs.
Fixed vs varifocal lens characteristicsFocal length, FoV, and distance relationsSensor size impact on coverage widthCalculating pixels per foot or metreSelecting lenses for entrances and gates
