95-90-00 VIDEO DOWNLINK Back
- System Function
- Systems Components (Ref. Fig. 1)
- Encryption Unit
- Transmitter Unit (TU)
- Power Amplifier (PA)
- Video Downlink Antenna
- Video Downlink Switch/ Annunciator
- Aircraft On Ground (AOG) Relay
- Reset Video Downlink Switch
- Two PA Cooling Fans
- System Operation
The microwave video downlink system (the system) is installed to transmit video and audio signals from the aircraft video and audio system to a ground station. At the ground station, the signals can be displayed on a color monitor and/ or recorded on a VHS video recorder.
The primary components of the system are the:
The video downlink system receives video signals from the FLIR/ TV system or the video cassette recorder (VCR) system. It also receives audio signals from the operator audio control panel or from the VCR system. The signals are frequency modulated onto a microwave carrier by the Transmitter Unit. Using microwave energy, the modulated signal is transmitted through the video downlink antenna to a ground station.
When the signals are not encrypted, transmission can be received by a ground station at a range of up to 96Km. To achieve this range, a clear line of sight is required between the transmitting video downlink antenna on the aircraft and the receiving antenna at the ground station. When the signals are encrypted, the range over which the signals can be received by a ground station is reduced by up to fifty percent.
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