SDX-GDB High-Power HD Video Transmission System

Overview

The SDX-GDB High-Power HD Wireless Video Transmission System is engineered for extreme long-range applications where standard backpack systems cannot reach. With transmit power adjustable from 10 to 50 watts -- ten times the output of typical portable units -- the GDB covers airborne missions up to 100-130 kilometers, maritime deployments at 20-60 kilometers, and urban environments at 5-20 kilometers. Designed as a rack-mount solution for vehicles, command posts, and fixed installations, it delivers the same broadcast-grade COFDM reliability and H.264 HD 1080P quality as its backpack counterpart, but at distances that open up fixed-wing aircraft, ship-to-shore, and metropolitan-area coverage.

Key Features

• High power output continuously adjustable from 10W to 50W via the integrated LCD panel, with coverage to match
• Full HD 1080P H.264 compression (1920x1080, compatible with 1080I, 720P, and 480P/SD)
• Dual video input via SDI and HDMI interfaces with SDI loop-through output for local monitoring
• Narrowband COFDM operation with selectable channel bandwidth from 1 to 8 MHz in 1 MHz steps
• 256-bit dynamic AES encryption for secure transmission
• Dual-antenna space diversity reception for stable, dropout-free image reception
• Built-in high-performance cavity filtering on the receiver for superior adjacent-channel rejection
• Rack-mount 19-inch 1U receiver chassis at 480x280x45mm and 2kg; transmitter at 485x340x90mm and 5kg
• Standard AC 220V power (DC 28V available on request) for continuous fixed-site or vehicle-mounted operation
• LCD status display and parameter tuning on both transmitter and receiver, with signal strength percentage readout

Technical Highlights

The SDX-GDB inherits the same COFDM engine as the SDX-GDA family, scaling it across a much higher power amplifier stage. COFDM's multicarrier approach provides inherent resilience to multipath and frequency-selective fading: data is spread across hundreds of narrowband subcarriers, each individually modulated from BPSK up to 64QAM. Forward error correction at rates from 1/2 to 7/8 recovers data from subcarriers affected by interference or deep fades, while the guard interval (selectable from 1/32 to 1/4 of the symbol duration) absorbs delayed echoes without inter-symbol interference. The receiver's space diversity combiner merges two independently faded signal paths, dramatically reducing the probability of simultaneous deep fades on both antennas.

Applications

The GDB system is the backbone of long-distance wireless video relay for broadcasters and security forces. Its primary deployment chain is camera-crew-to-broadcast-van-to-station: a cameraperson within 1 km of the van transmits wirelessly, and the van's GDB relays the HD feed 10-40 km back to the studio -- all without fiber or satellite. At the full 50W setting, airborne platforms relay real-time video over 100 km, maritime patrols maintain links across 60 km of open water, and fixed urban installations bridge 20 km through dense city environments. Applications include live sports outside broadcast, news gathering, border surveillance, coastal monitoring, and disaster response command relay.

Why Choose This System

When the mission demands coverage measured in tens of kilometers rather than hundreds of meters, the SDX-GDB bridges the gap that standard portable systems leave open. Its 10-50W adjustable power, rack-mount integration, and uncompromised COFDM HD performance make it the definitive choice for airborne, maritime, and metropolitan-wide video transmission. If your operation needs to move broadcast-quality video across the horizon, this is the amplifier that gets you there.