USERS MANUAL
NR2310-O/G
REVISION
H
DATE
7/17/20
Page #:
8 of 21
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Typical OCXO
Another alternative for a frequency reference is an atomic reference. These
devices use a change in atomic state of an isotope of Cesium or Rubidium for
stability. Instead of a stability of ±50 ppb/year for a typical OCXO- stability of ±1
ppb/year is very common.
Atomic sources are very complex and while a very stable source, phase noise
performance may not be acceptable for many applications.
TYPICAL PHASE NOISE PERFORMANCE FOR A RUBIDIUM REFERENCE
For applications requiring the stability of an atomic source but also requiring low
phase noise a low phase noise OCXO is disciplined to an atomic source. The
phase noise for the NR2310-R/O has phase noise improved by well over 20 dB
by this technique.
