Rubidium 10 MHz Frequency References
Rubidium references, unlike a mechanical resonant system, is based upon an atomic transition for core timing. As a result, temperature, aging, positional stability are all dramatically improved over an OCXO. A rubidium source offers a holdover stability that is typically 50 times better than an OCXO ( 1 ppb/year versus 50 ppb/year). The downside is that Rubidium sources are more expensive and have poor phase noise performance.
Our basic products are the NR2110-R and NR2310-R Rubidium frequency references which offer excellent stability at a moderate price. Atomic reference phase noise levels may not be acceptable for many applications. To provide a stable low noise source, a low noise OCXO is incorporated that is disciplined to the Rubidium reference. This results in a low noise, high stability reference (NR2110-R/O, NR2310-R/O). For applications demanding even better long-term stability, we offer GNSS disciplined 10 MHz references that offer the long-term stability of GNSS disciplining, low noise of a high performance OCXO and short-term stability of Rubidium (NR2110-R/O/G, NR2310-R/O/G, NR8403-RO).