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tcxo [2018-08-26 19:51:49] (current)
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 +====== RTL-SDR TCXO mod ======
  
 +  * Buy [[http://​www.ebay.com/​itm/​400943404059|TCXO 28.8MHz 28.800M Ultra precision Crystal Oscillators DIP 0.5ppm]]
 +  * Desolder RTL-SDR xtal
 +
 +<​code>​
 + /​-----------\
 + | 1       3 |
 + | 2       4 |
 + ​+-----------/​
 +(top view)
 +</​code>​
 +
 +  * Solder:
 +    * 1 ... +3.3V (can be found e.g. on the IR receiver)
 +    * 2 ... not connected
 +    * For rtl-sdr that used the small rectangular oscillator:
 +      * 3 ... R820T pin 8 (the second in the second row)
 +    * For rtl-sdr that used the 2-pin THT xtal
 +      * 3 ... the other pin than pin 8 that was connected to the xtal
 +    * 4 ... GND
 +  * Enjoy your 0.5ppm experience!
 +
 +  * When used in constant temperature,​ the original oscillator and TCXO provide comparable performance (+/- 0.1 ppm over several hours).
 +  * However, increasing the temperature from 28 to 48 °C means 0.14 ppm drift of the TCXO, but 3 ppm drift of the original oscillator.
tcxo.txt · Last modified: 2018-08-26 19:51:49 (external edit)