She sourced a crystal oscillator which runs at 1 MHz, ... [Paul] has been working on porting over Arduino libraries for use with the Teensy microcontroller platform.

[Tom] used a Teensy 3.1 Arduino compatible board, ... The VCXO means voltage controlled crystal oscillator. The crystal is 25 MHz and provides a very stable frequency source for the chip.

Starting a crystal oscillator fast in an IoT node is an art: the high Q needed for stability means they take milliseconds to get going, just to transmit a 128μs Bluetooth LE packet, and power is at a ...

This is very important with a Q of 40,000, he said. It helps to reduce sensitivity to external vibrations, which SiTime claims is twenty times better than crystal oscillator sensitivity. In normal use ...