What the thread found

• Wireless video signals behave according to line-of-sight propagation principles and are not negatively affected by water itself, contrary to common misconceptions about water blocking signals.
• Higher frequencies like UHF and VHF are purely line-of-sight and perform better in open spaces, while lower frequencies pass through dense objects more effectively.
• Video transmission over water lacks the advantage of signal bouncing off reflective surfaces like buildings or equipment, requiring direct line-of-sight between transmitter and receiver antennas.
• Between 5 GHz and 2.4 GHz frequencies, 2.4 GHz would theoretically perform better over water due to lower absorption when no interference is present, though both frequencies are highly directional and limited in range.
• A transmitter's efficiency varies depending on which channel is used, with some channels being significantly more optimized in the design than others, potentially resulting in 20 percent or greater power loss on non-optimal channels.
• Single-channel transmitters are typically optimized for their specific frequency, while multi-channel transmitters usually optimize for only one or a few channels within their range.
• Directional antennas provide gain in one direction and rejection in the opposite direction but require precise aiming and suffer from signal loss in coaxial cable and connectors.
• Thin coaxial cable is highly lossy and should be kept as short as possible, with thicker, better-shielded cable used for longer runs to minimize signal loss.
• Antenna efficiency depends on the frequency it is tuned for, with significant power loss occurring when an antenna is tuned to a different frequency than the transmitter channel being used.
• Manufacturer-supplied antennas may not always be optimal, and aftermarket antennas from specialized manufacturers can potentially improve transmission and reception performance.

Depends on

• Discussion occurred in 2006 and equipment models mentioned may be outdated.
• Reception optimization techniques were mentioned as a future topic but not included in this thread.
• No specific performance data or measurements were provided to quantify signal loss or improvement gains.
• The discussion does not address modern 2.4 GHz and 5 GHz interference patterns that may differ from 2006.
• Specific antenna recommendations from the Radiall Larsen catalog were not detailed in the thread.

Gear in this thread

Moduluscatalog

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