Oscillators available for Meinberg GPS Receivers/Time Servers: OCXO, TCXO, Rubidium
By default, our satellite controlled clocks like the
GPS receiver GPS170
are shipped with the OCXO LQ oscillator.
Other oscillators with higher accuracy may be
ordered optionally:
Due to space restrictions not all oscillators are supported for all form factors.
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°C) |
±2·10-7
(0...60°C) |
±5·10-8
(-20...70°C) |
±1·10-8
(5...70°C) |
±2·10-10
(5...70°C) |
±6·10-10
(-25...70°C) |
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.
Here you can download a printable version of the oscillator list.
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