Rubidium frequency standards are a low-drift alternative to an OCXO or TCXO with stability of < 1 ppb/year. As high-precision oscillators, Rubidium frequency standards are especially useful for measurement, testing, and many telecommunication applications. To further enhance a Rubidium based frequency reference, Novus offers Rubidium frequency references with an embedded low phase noise OCXO to meet system frequency reference phase noise requirements. A Rubidium reference is alternative source if a GPS disciplined oscillator is not an option.
Affording excellent stability, Rubidium frequency standards are a next best choice when operating in a GPS denied environment. That being said, adding a GPS-locking system will improve the 1ppb/year drift by approximately three orders of magnitude. For typical telecommunication infrastructure, GPS, or other types of applications, Rubidium standards offer excellent holdover performance.
For many applications, the phase noise of a Rubidium reference is not acceptable. The NR2310D-R-O incorporates a low noise OCXO that is disciplined to the Rubidium reference. Ten channels typically meets the needs of most systems eliminating the need for a distribution amplifier and minimizing noise degradation. All channels are continuously monitored and displayed locally and accessible via RS232 or Ethernet.
10Hz -125
100Hz -140
1K -155
10K -155
Calibration application under Design Considerations
NR2310D-R/O/G
For many applications, the phase noise of a Rubidium reference is not acceptable. The NR2310D/R/O incorporates a low noise OCXO that is disciplined to the Rubidium reference. This product also adds a 26 channel GNSS receiver that brings the long-term stability of GNSS. The GNSS GPS receiver disciplines the Rubidium source. The NR2310D-ROG brings the best of three timing technologies together- the low phase noise of the OCXO, excellent holdover stability of Rubidium and the long-term stability of GNSS locking. Ten channels typically meets the needs of most systems eliminating the need for a distribution amplifier and minimizing noise degradation. All channels are continuously monitored and displayed locally and accessible via RS232 or Ethernet.
10Hz -125
100Hz -140
1K -145
10K -150
NR2310D-R
A low cost reference featuring the stability of Rubidium (< 1 ppb/year). In many applications, an OCXO does not have the stability required and GNSS GPS locking is not an option. This reference offers excellent stability where cost is a major driver and the higher phase noise of Rubidium is acceptable. If low phase is also required see our NR2310D-RO that adds a low phase noise OCXO to improve phase noise. The ten channel configuration yields a better phase noise and skewing than a reference and a separate distribution amplifier. Skewing for the ten channels is less than 5 ns. This single rack unit chassis, having ten channels, frequently meets the needs of complex systems and often eliminates the need for a distribution amplifier.
10Hz -85
100Hz -115
1K -135
10K -140
Low Cost dual channel 10 MHz Rubidium frequency reference. Channels are continuously monitored and displayed locally and accessible via RS232 or Ethernet.
10Hz -85
100Hz -115
1K -135
10K -140
For many applications, the phase noise of a 10MHz Rubidium reference is not acceptable. The NR2110D-R-O incorporates a low noise OCXO that is disciplined to the Rubidium reference. Channels are continuously monitored and displayed locally and accessible via RS232 or Ethernet.
10Hz -130
100Hz -140
1K -145
10K -150
NR2110D-R/O/G
For many applications, the phase noise of a Rubidium reference is not acceptable. The NR2110D-R/O/G incorporates a low noise OCXO that is disciplined to the Rubidium reference. This product also adds a 26 channel GNSS receiver that brings the long-term stability of GNSS. The NR2110D-R/O/G brings the best of three timing technologies together- the low phase noise of the OCXO, excellent holdover stability of Rubidium and the long-term stability of GNSS GPS locking. All channels are continuously monitored and displayed locally and accessible via RS232 or Ethernet. Additional stability options offer thermal and vibration isolation.
10Hz -125
100Hz -140
1K -145
10K -150
NR8403-ROG
The NR8403 in a versatile modular package bring stability to almost any location. Wide power operating range with GNSS GPS locking to further enhance long-term stability. The low noise option adds an ultra-low phase noise OCXO that can be also vibration isolated to reduce mechanical induced phase noise. Phase noise < 155 dBc/Hz at 10kHz. Popular in scientific, calibration labs and satellite up-links.
Harmonics <40 dBc
Excellent holdover stability < +-5E-11/month
GNSS GPS disciplined
Outputs are fault protected and monitored continuously
Built-in test circuitry throughout the design
Available with and without display
10 and 50 MHz available
GPS DO
NR8403-R
The NR8403-R in a versatile modular package bring stability to almost any location. Wide power operating range with optional GNSS locking to further enhance long-term stability (NR8403-RG). The Rubidium source affords outstanding holdover stability. The low noise option adds an ultra-low noise OCXO that can be also vibration isolated to reduce mechanical induced phase noise (NR8403-RO). Phase noise < 155 dBc/Hz at 10kHz. Unit may also be locked to an external 10 MHz or 1PPS. Popular in scientific, calibration labs and satellite up-links.
Harmonics <40 dBc
Excellent holdover stability <±5E-11 month
GNSS GPS locking option
Low phase noise option
Outputs are fault protected and monitored continuously
Built-in test circuitry throughout the design
Available with and without display
10 and 50 MHz available
Synthesized 1PPS
The NR8403-RO in a versatile modular package bring stability to almost any location. Wide power operating range with optional GNSS GPS locking to further enhance long-term stability (NR8403-RG). The Rubidium source affords outstanding holdover stability (+-5E-11/month). The low noise OCXO that can be also be vibration isolated to reduce mechanical induced phase noise . Phase noise < 155 dBc/Hz at 10kHz. Unit may also be locked to an external 10 MHz or PPS. Popular in scientific, calibration labs and satellite up-links.
Harmonics <40 dBc
Excellent holdover stability < +-5E-11/month
10 MHz and 1PPS Outputs are fault protected
Built-in test circuitry throughout the design
Available with and without display
10 MHz and 50 MHz available
Need low noise and GNSS GPS locking? NR8403-ROG
The NR8403 in a versatile modular package bring stability to almost any location. Wide power operating range with GNSS locking to further enhance long-term stability. The low noise option adds an ultra-low noise OCXO that can be also vibration isolated to reduce mechanical induced phase noise (NR8403-ROG). Phase noise < 145 dBc/Hz at 10kHz. Popular in scientific, calibration labs and satellite up-links.
Harmonics <40 dBc
Excellent holdover stability < +-5E-11/Month
GNSS GPS locking
Low phase noise options
Outputs are fault protected and monitored continuously
Built-in test circuitry throughout the design
Available with and without display
10 MHz and 50 MHz available
1PPS available
A solid, 16 channel platform. Rubidium source provides outstanding stability. Embedded 26 channel GNSS receiver locks and stays locked in weak signal environments. Transient and fault protected channels designed for the a high level electromagnetic environment to provide years of reliable service. AC and DC power options available for critical installation.
•16 channel 10 MHz reference with built-in GNSS receiver.
•16 channel GNSS GPS locked OCXO 10 MHz frequency reference.
•Low phase noise OCXO – 140dBc/Hz at 100 Hz.
•Rubidium source stability < +-5E-11/month
•Locked accuracy <3E-11.
•16 channels very often eliminate the need for a distribution amplifier.
•Harmonics are well below -30dB.
•Chassis is 1 RU (~1.7 inches) and saves valuable rack space.
•All inputs and outputs are transient protected.
•Built-in test.
•Unit features auto-calibration to compensate for long-term drift.
•High performance 26 channel GPS receiver that supports GPS, GLONASS, SBAS, QZSS. By being able to receive data from multiple satellite constellations, lower lock time is achieved. Maintaining lock in poor signal environments is enhanced.
1PPS available
Optional Networking and SNMP available (for a 10 channel platform see NR2310D-O/G )
A solid, 16 channel platform. Rubidium source provides outstanding stability < +-5E-11/month. Transient and fault protected channels designed for the a high level electromagnetic environment to provide years of reliable service. AC and DC power, SNMP options available for critical installations.
•16 channel 10 MHz reference
•Rubidium Stability <+-5E-11/month
•16 channels very often eliminate the need for a distribution amplifier.
•Harmonics are well below -30dB.
•Chassis is 1 RU (~1.7 inches) and saves valuable rack space.
•All inputs and outputs are transient protected.
•Built-in test.
Optional Networking and SNMP available (for a 10 channel platform see NR2310D-O/G )
The NR2316D-ROG offers low noise and GNSS locking
NR2110-R
Low cost dual channel 10MHz Rubidium frequency reference. Channels are continuously monitored and accessible via RS232
10Hz -85
100Hz -115
1K -135
10K -140
If lower phase noise is required- see the NR2110-RO
NR2110-RO
Low cost dual channel 10 MHz Rubidium frequency reference. Low noise OCXO is locked to the Rubidium source. Channels are continuously monitored and accessible via RS232
10Hz -125
100Hz -140
1K -145
10K -150
The Novus KronosΙ represents our highest performance reference for the most demanding master reference applications. The 184 channel GNSS receiver provides critical timing information that is highly processed to minimize reference jitter and noise. The receiver supports. GPS L1C/A L2C, GLO L1OF L2OF, GAL E1B/C E5b, BDS B1I B2I, QZSS L1C/A L1S L2C, SBAS L1C/A. To assure the integrity of the reference, a separate GNSS receiver is used as an independent time base for an internal gapless frequency counter to monitor the master reference.
A real time continuous calculation of Allan Deviation is performed and is likely the best indicator of reference health one could have. Data logging allows the user to review timing performance on any day from a performance log that is more than two years deep. Alerts can be established to detect a variation from Allan Deviation standard performance.
To further enhance stability, the timing control network and reference are vibration and thermally-isolated. The timing loop operates with a 40 psec resolution to enhance process control. Power supplies include wide bandwidth linear regulators to eliminate ripple noise from the amplifiers. Amplifiers are further isolated with individual passive filters and the amplifiers have over 100 dB of 60 Hz rejection. Every element of the design is focused on stability and noise reduction.
Rubidium stability
Low Phase noise clean-up OCXO
Continuous Allan Deviation calculation
Dual Time base provides real-time reference monitoring
Data logging rolling two years of more performance data
10 channels of 10 MHz 13 dBm sine wave
SNMP reports complete status
Allan Deviation < E-13
Rackmount or Benchtop
NTP option
Monitoring of all internal critical circuitry
Statistical analysis of reference performance
Data logging to demonstrate past performance as required.
Phase Noise
10Hz -130
100Hz -145
1K -155
10K -160
The Novus KronosΙ represents our highest performance reference for the most demanding audio reference applications. The heart of the reference is an Ultra stable Rubidium reference that is stable to 1 ppb/year. The Rubidium reference is followed by a ultra-low noise oven controlled crystal oscillator that is disciplined by the Rubidium source. To further advance the performance of your audio system, a 184 channel GNSS receiver provides critical timing information that is highly processed to minimize reference jitter and noise. The receiver supports. GPS L1C/A L2C, GLO L1OF L2OF, GAL E1B/C E5b, BDS B1I B2I, QZSS L1C/A L1S L2C, SBAS L1C/A. To assure the integrity of the reference, a separate GNSS receiver is used as an independent time base for an internal gapless frequency counter to monitor the master reference.
A real time continuous calculation of Allan Deviation is performed and is likely the best indicator of reference health one could have. Data logging allows the user to review timing performance on any day from a performance log that is more than a year deep. Alerts can be established to detect a variation from Allan Deviation standard performance.
To further enhance stability, the timing control network and reference are vibration and thermally-isolated. The timing loop operates with a 40 psec resolution to enhance process control. Power supplies include wide bandwidth linear regulators to eliminate ripple noise from the amplifiers. Amplifiers are further isolated with individual passive filters and the amplifiers have over 100 dB of 60 Hz rejection. Every element of the design is focused on stability and noise reduction.
The high performance distribution amplifier provides 10 75 Ohm outputs that are completely transient and fault protected.
If you can not support an antenna in your location- Call for our Rubidium based version of Kronos1 that will bring low noise Rubidium stability to your audio system.
Rubidium stability
Low Phase noise clean-up OCXO
Continuous Allan Deviation calculation
Dual Time base provides real-time reference monitoring
Data logging for a year of more performance data
10 channels of 10 MHz 1 Vpp into 75 ohms
Allan Deviation < E-13
Rackmount or Benchtop
Monitoring of all internal critical circuitry
Statistical analysis of reference performance
Data logging to demonstrate past performance as required.
Phase Noise
10Hz -130
100Hz -145
1K -155
10K -160
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