Jean-François FOURCADIER
F4DAY

Montpellier  (France)

ham projects

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© 2000-2004- J.F. Fourcadier
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high speed data television antennas microwaves repeaters miscellaneous

Pictures

 

 

The 19" rack :

v_rack.jpg (2367 octets)

(click to enlarge)

 

The clock oscillator, the pseudo-random generator and the biphase coding :

v_pseudo.jpg (2048 octets)

"cheap and dirty !"

 

The transmitter Nyquist filter and the video amplifier :

v_vid.jpg (2041 octets)

 

The spectrum of the 'video' signal which is transmitted to the transmitter :

v_spectre.jpg (1804 octets)

 

A 2 Mbit/s biphase signal is transmitted on 13 cm towards an ATV repeater, 50 km away. The repeater transmits the signal, back on the 23 cm band. Here the result at the output of my receiver (a standard satellite demodulator !) Improvement are necessary,
but the result is hopeful :

v_recu.jpg

 

To be continued .....

B5+ et 73 de Jean-François Fourcadier, F4DAY

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As you can guess, english is not my mother-tongue. If you are living in UK or in the USA or in another english language country, you can help me to improve the quality of my website. Just send me an email with the mistakes you have detected (the biggest first ! ). Even one or two corrected sentences will be greatly appreciated. Thank you for your help !

© 2000-2004  J.F. Fourcadier F4DAY