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# Phase noise and ADEV of the WR Switch using different TCVCXOs
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This page is a summary of the results of Allan Deviation and Phase noise
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measurements done using a modified Grand Master (described in [*White
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Rabbit Switch performance in Grandmaster
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mode*](https://www.ohwr.org/project/wr-low-jitter/wikis/Documents/White-Rabbit-Switch-performance-in-Grandmaster-mode), second half of the
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document). The reference clock is provided through a
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[WRS-SMA-clock-board](WRS-SMA-clock-board).
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The following table shows the phase noise perfomance of some VCTCXO
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taken into account. Click on the name of the VCTCXO to see the
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perfomance of WRS using the selected VCTCXO.
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| **VCTCXO**| \* Phase noise @ 1Hz **|** Phase noise @ 10Hz **|** Power
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supply compatible **|** Footprint compatible **|** Availabe on stores
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\*|
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| VM53S3 (currently installed) | -31 dBc/Hz (ref. 10MHz) | -86 dBc/Hz
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(ref. 10MHz) | YES 3.0V | YES (5x3.2mm) | YES Radiospare |
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| Vectron VT-803 | -70 dBc/Hz (ref. 10MHz) | -99 dBc/Hz (ref. 10MHz) |
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YES (customizable) |
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YES | NO (contact Vectron) |
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| CFPT-9301 | -77 dBc/Hz (ref. 10MHz) | <s>97 dBc/Hz (ref. 10MHz) | 3.3V
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+/</s> 10% | YES | YES (Farnell) |
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-----
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