This shows you the differences between two versions of the page.
— |
tcxo [2018-08-26 19:51:49] (current) |
||
---|---|---|---|
Line 1: | Line 1: | ||
+ | ====== 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. |