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mardi 26 avril 2011

Description des problèmes de frequency drift qui vient avec l'altitude

Il s'agit du projet Horus

http://blog.darklomax.org/?p=36

L'équipement utilisé par le projet est :


MobSenDat Telemetry board, 
C'est la plateforme Arduino qui fait de la télémétrie.
http://www.freetronics.com/products/mobsendat
MobSenDat Kit (Mobile Sensor Datalogger)


http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1269669556




NTX2 transmitter module

http://www.radiometrix.com/content/ntx2 25mW


Un meilleur emetteur : 
The TX1H transmitter modules offer a 100mW RF output VHF data link in Radiometrix SIL standard pin-out and footprint. This makes the TX1H ideally suited to those low power applications where existing narrow band and wideband transmitters provide insufficient range. Together with the matching RX1 or BiM1R receiver a one-way radio data link can be achieved over a distance up to 10km+ with suitable choice of data rate and antennas. 




Project Horus 14 using something else
http://projecthorus.org/?page_id=1773


Even better sur autre fréquence


500mW VHF Narrowband Transceiver

Frequency:151.300MHz (special 120MHz to 180MHz)
The BiM1H transceiver modules offer a 500mW RF output VHF data link in Radiometrix transceiver standard pin-out and footprint. This makes the BiM1H ideally suited to those low power applications where existing wideband transceivers provide insufficient range.

Features

  • Standard frequency 151MHz band
  • Other frequencies from 120MHz to 180MHz
  • Data rates up to 3kbps for standard module
  • Usable range over 10km
  • Fully screened
  • Feature-rich interface (RSSI, analogue and digital baseband
  • Low power requirements

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