Video Camera: using Aurel modules.

Be careful ! in France you are not allowed to transmit in realtime video from an aircraft !

You need:

• Aurel H2-TV Channel Audio-Video Modulator
  Mod. MAV-VHF224 225 Fr

  Description :
  Low cost CATV circuit for high quality audio-video signals, operating in the VHF Band. Input signals can be fed from videocameras, tuners, video tape players, etc, directly using the lines of the standardized output connectors (i.e. SCART), while output R.F. can be received with any standard not modified TV receiver. The Modulator is very stable in frequency and features high harmonic rejection.

Characteristics Min Typ Max Unit VS Supply Voltage 4.75 5 5.25 Vdc IS Supply Current   90   mA PO RF Output power   1   mW IM 3rd Order Intermodulation     60 dBm FC Carrier Frequency 223.75 224.5 225.25 MHz IM Video Input Modulation   1.2   Vpp FSC Sub-Carrier Frequency   5.5   MHz MA Audio FM Modulation   1   Vpp II Input Impedance   100   KW TPE Pre-enphasis   50   S TOP Operating temperature range -20   +80 °C

Pin-Out 1 Ground 2 Audio Input 3 Ground 4 Video Input 5 Ground 6 +5V 7 Ground 8 RF Output

• Aurel H2 Channel CATV Amplifier
  Mod. M.C.A. 224 130 Fr

  Description :
  Linear CATV circuit for high quality audio-video signal amplification, operating on the VHF H2 Channel. RF input signal can be derived from a Audio Video Modulator (best operation is with our mod. MAV-VHF 224). Output can be received with any standard not modified TV receiver.

Characteristics Min Typ Max Unit VS Supply Voltage 11.4 12 12.6 Vdc IS Supply Current   100   mA FW Working Frequency   224   MHz PO RF Output power (2 mW IN)   +19   dBm DI Intermodulation distorsion   50 60 dB TOP Operating temperature range -20   +80 °C

Pin-Out 1 +12v 2 Enable 3 Ground 6 RF Input 7 Ground 10 Ground 13 Ground 15 RF Output

• Mini color video cam 890 Fr

Characteristics Video system PAL Effective pixel 628*582 Synchro internal Resolution (TV lines) 380 S/N Ration > 42 dB Mill Illumination 3 lux at F1.2 Electronic shutter 1/50 – 1/150 000 Video output 1V , 75 Ohms Lens 3.6 mm – 5 mm (F 2 -> 4.5) Lens Angle 92° -> 65° Power current 50 mA Power Source DC12V

Pin-Out Red +12v Yellow signal Black Ground

• a good and safety box (in case of crash) 18 Fr
• Accus (2 * 9V), a free rx channel. 296 Fr
• 2 voltage regulator : 7812 (12V) and 7805 (5V) + 2 * 100 nF 27 Fr
• A small TV (LCD) ex 11cm TFT 1000 Fr

Conclusions :

The result is very bad with no specific antenna, maybe I should replace my 32 cm wire with something better. Distance are bad too and some polarized effect appear when you turned the device : Really BAD !

Â