Oscillators available for Meinberg GPS Receivers/Time Servers: OCXO, TCXO, Rubidium

Accuracy of frequency outputs of Meinberg GPS Receivers with different oscillator options

 
 TCXO OCXO LQ OCXO MQ OCXO HQ OCXO DHQ Rubidium
(only available for 3U models)
short term stability
(τ = 1 sec)		 2·10-9 1·10-9 2·10-10 5·10-12 2·10-12 2·10-11
accuracy of PPS
(pulse per sec)		 < ±250 nsec < ±250 nsec < ±100 nsec < ±100 nsec < ±100 nsec < ±100 nsec
phase noise 1Hz -60dBc/Hz
10Hz -90dBc/Hz
100Hz -120dBc/Hz
 1kHz -130dBc/Hz		 1Hz -60dBc/Hz
10Hz -90dBc/Hz
100Hz -120dBc/Hz
 1kHz -130dBc/Hz		 1Hz -75dBc/Hz
10Hz -110dBc/Hz
100Hz -130dBc/Hz
 1kHz -140dBc/Hz		 1Hz < -85dBc/Hz
10Hz < -115dBc/Hz
100Hz < -130dBc/Hz
 1kHz < -140dBc/Hz		 1Hz < -80dBc/Hz
10Hz < -110dBc/Hz
100Hz < -125dBc/Hz
 1kHz < -135dBc/Hz		 1Hz -75dBc/Hz
10Hz -89dBc/Hz
100Hz -128dBc/Hz
 1kHz -140dBc/Hz
accuracy
free run, one day		 ±1·10-7
±1Hz (Note1)		 ±2·10-8
±0.2Hz (Note1)		 ±1.5·10-9
±15mHz (Note1)		 ±5·10-10
±5mHz (Note1)		 ±1·10-10
±1mHz (Note1)		±2·10-11
±0.2mHz (Note1)
accuracy
free run, one year		 ±1·10-6
±10Hz (Note1)		 ±4·10-7
±4Hz (Note1)		 ±1·10-7
±1Hz (Note1)		 ±5·10-8
±0.5Hz (Note1)		 ±1·10-8
±0.1Hz (Note1)		 ±5·10-10
±5mHz (Note1)
accuracy
GPS-synchronous, averaged 24h		 ±1·10-11 ±1·10-11 ±5·10-12 ±1·10-12 ±1·10-12 ±1·10-12
accuracy of time
free run, one day		 ± 4.3 msec ± 865 µs ± 65 µs ± 22 µs ± 4.5 µs ± 1.1 µs
accuracy of time
free run, one year		 ± 16 s ± 6.3 s ± 1.6 s ± 788 ms ± 158 ms ± 8 ms
temperature dependant drift
free run		 ±1·10-6
(-20...70”ĘC)		 ±2·10-7
(0...60”ĘC)		 ±5·10-8
(-20...70”ĘC)		 ±1·10-8
(5...70”ĘC)		 ±2·10-10
(5...70”ĘC)		 ±6·10-10
(-25...70”ĘC)

Note 1:
The accuracy in Hertz is based on the standard frequency of 10 MHz. For example: Accuracy of TCXO (free run one day) is ±1·10-7·10MHz = ± 1 HZ

The given values for the accuracy of frequency and time (not short term accuracy) are only valid for a constant ambient temperature !
A minimum time of 24 hours of GPS-syncronicity is required before free run starts.

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