5.6 GHz

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Revision as of 18:03, 14 September 2017 by M0YDH (talk | contribs) (Pic of Crump transceiver detail at CAT17)
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Amateur TV activity on the 6 cm band is increasing due to the availability of cheap modules intended to transmit “First Person Video” back from drones to their operators. These units are widely advertised on eBay with titles similar to “Tarot 5.8G 600MW Telemetry TX/RX Combo for FPV Image Transmission TL300N” at reasonable prices. The receive and transmit frequencies are set using DIP switches, and most tune to our chosen FM ATV simplex frequency of 5665 MHz. The recommended polarisation is horizontal.

The typical units are very small but have reasonable FM-TV performance with a quoted spec of 600 milliwatts out and receiver sensitivity of -80 dBm. Amplifiers are available to raise the output power to 2 watts or more.

Using dish aerials of 30 – 60 cm (such as a surplus Sky dish), line of sight ranges of 80 km can easily be achieved. P5 (noise free) FM ATV pictures were exchanged over an 85 km path using the equipment pictured.

5.6 GHz Orientation Small.jpg

Detail of G8GKQ transceiver setup is shown here and as seen at CAT17 G8GKQ 6cm Transceiver - receiver unit on left & transmitter with fan on the right.

Availability of the K&L coaxial relay enables Dave to use one antenna. It may be cheaper to use a seperate antenna for receive and transmit.

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