tcxo
Differences
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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)
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