AN95089 Datasheet, PDF (17/19 Pages) Ramtron International Corporation – BLE Crystal Oscillator Selection and Tuning Techniques

PSoC® 4/PRoC™ BLE Crystal Oscillator Selection and Tuning Techniques
13 Appendix: Frequency Error (Transmit Center Frequency Tolerance)
In BLE, the deviation of the RF center frequency during the packet transmission should not exceed ±150 kHz for the
whole packet. For example, when a radio transmits at the center frequency of 2480 MHz, it could be 2479.850 MHz,
or 2480.150 MHz. This is the tolerance in the center frequency when transmitting a packet.
The center frequency is derived from the 24-MHz ECO and therefore any inaccuracies in the crystal frequency would
be multiplied up to the center frequency.
The clock accuracy requirement after taking into account all the factors that affect clock accuracy is
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Document No. 001-95089 Rev. *A
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