Type Impedance Bandwidth Max Distance (Unamplified) Common Use Case
RG-59 75 Ω 1 GHz 250 m (720p) Short-range analog CCTV
RG-6 75 Ω 3 GHz 500 m (1080p) HD-TVI/AHD systems
RG-11 75 Ω 3 GHz 800 m (4K) Long-range or high-resolution
B. Signal Transmission Technologies
Analog CCTV:
Traditional baseband video (NTSC/PAL) over RG-59, supporting resolutions up to 720×576 pixels.
Limited to 1 Vp-p signal amplitude with BNC connectors.
HD over Coax:
HD-TVI (High Definition Transport Video Interface): Transmits 1080p/4K video up to 500 m via RG-6 (e.g., Hikvision’s Turbo HD).
HD-CVI (High Definition Composite Video Interface): Supports 12 MP resolution with RG-11 (Dahua’s solution).
AHD (Analog High Definition): Cost-effective 5 MP transmission over existing coaxial infrastructure.
Power over Coax (PoC):
Delivers power (typically 12–24 V DC) and video over a single cable, eliminating separate power lines.
Standards: HD-TVI 3.0 supports up to 30 W power delivery.
RG-6 with HD-TVI: <3 dB loss at 500 m for 1080p signals.
RG-11 with 4K: <6 dB loss at 800 m using frequency modulation.
B. Immunity to EMI/RFI
Braided copper shielding (90% coverage in RG-6) prevents interference from motors, radios, and power lines.
Critical in industrial settings (e.g., factories, power plants).
C. Cost-Effective Upgrades
Legacy analog systems can be upgraded to 4K resolution without rewiring by replacing DVRs with HD-TVI/AHD compatible units.
D. Simplified Installation
Pre-terminated BNC connectors enable plug-and-play setups.
No configuration required (vs. IP cameras needing IP addressing).
Embedding sensor data (temperature, motion) into video streams via HD-TVI metadata channels.
5G Backup Links:
Coaxial networks as failover paths for wireless surveillance in smart cities.
Sustainable Materials:
Recyclable PE jackets and lead-free shielding compliant with RoHS 3.0.
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