描述
LN Rubidium建立在我们的LN CSAC GPSDO产品线的基础上，并向后兼容。与同类装置相比，具有更好的相位噪声、更好的ADEV性能、更低的热灵敏度、更好的保持性能、更长的寿命和MTBF以及更低的成本。LN Rb GNSSDO具有极低的相位噪声和极佳的ADEV性能，在相位噪声性能方面甚至超过了许多昂贵的低噪声OCXO，在ADEV性能方面超过了高端铯钟。在Ultimate性能选项中，该装置通常在1Hz偏移处表现出-115dBc/Hz的噪声，本底噪声低于-168dBc/Hz，ADEV性能在0.1s至20+秒范围内为5E-013，24小时平均ADEV低于8E-014。可以订购一个带CSAC的，为功耗低于1.4W和原子钟预热时间小于2分钟。
LN Rb GNSDO 单元还集成了最新一代GNSS接收器，支持GPS/Glonass/BeiDou/QZSS和SBAS，并可选择由外部SAASM GPS接收机驯服。LN Rb GNSDO有四种订购选项，具有不同的相位噪声/ADEV性能水平和各自的定价，以及不同的原子钟性能等级和技术（可以订购铷和铯微型原子钟）。该单元采用加固镀金铝外壳，可订购共形版本。与我们的CSAC GPSDO产品线完全向后兼容，支持SCPI和NMEA通信接口，并包括一个可在8V至36V范围内运行的航空电子兼容电源，稳态功耗为5.6W。
特点
- 超低相位噪声/ADEV
- GPS/Glonass跟踪-167dBm
- 亚微秒保持性能
- 铷微型原子振荡器
- 坚固的封闭式装置
- 功耗小于6W
- 仅1英寸高（3.4 x 4.4 x 1.0英寸）
- 72信道多GNSS接收器，允许一次跟踪任意两个GNSS系统
技术参数
| Module Specification: | ||||||
| Long-Term Oscillator Aging (without GNSS, Zero aging with GNSS) | <0.1ppb (ultimate and premium options), <0.3ppb (standard) per month | |||||
| Frequency Stability Over Temperature (0°C to +70°C) | <0.07ppb (ultimate), <0.1ppb (premium), <0.7ppb (standard) | |||||
| 1 PPS Stability | ±10ns to UTC RMS (1-Sigma) GPS Locked in Position Hold mode after 72 hours | |||||
| Holdover Stability* | <±0.6us over 24 Hour Period @+25°C (Ult and Prem, after 48 hours with GPS lock) | |||||
| ADEV (Ultimate OCXO option, 96+ hours GPS-locked, +25°C, no airflow, no vibration, no tilt ) | 0.1s:<4E-13, 1s:<5E-13, 10s:<8E-13, 100s<2.5E-12, 1Ks: 2E-12, 10Ks:<5E-13, 100Ks:<8E-14 | |||||
| 1 PPS Outputs (Rubidium or OCXO steered) | Two 5V CMOS outputs, one internal RS-422 | |||||
| 10MHz Outputs | One buffered 10MHz Sine Wave +13dBm ±2dBm, two un-buffered low-noise direct OCXO sine wave outputs (+5dBm to +10dBm), one internal +13dBm | |||||
| Options accessible internally to enclosure only | RS-422 (10MHz out, 1PPS out, 1PPS in, serial output), LCD port, 10MHz +13dBm Sine Wave, 5MHz CMOS, USB | |||||
| RS-232/USB Control | SCPI-99 Control at 9.6K, 19.2K, 38.4K, 57.6K, 115.2K | |||||
| RS-232/RS-422/USB NMEA Output Sentences | NMEA 0183 rev. 2.3, Sentences: GGA, RMC, ZDA, GSV, PASHR, and others | |||||
| GNSS Frequency, Antenna | L1 GPS and/or Glonass, Active Antenna 5V | |||||
| GNSS Receiver | 72 Channels, GPS, Glonass, BeiDou, QZSS, SBAS: WAAS/EGNOS/MSAS/GAGAN | |||||
| GNSS Sensitivity | Acquisition -148 dBm, Tracking -167 dBm (GPS and Glonass) | |||||
| GPS Receiver Motion Adaptive Filter Settings | Optimized depending on vehicle velocity (Auto-sensing, Auto-switching option) | |||||
| TTL Alarm Output | GNSS Unlock and Hardware Failure indicator | |||||
| Warm Up Time / Stabilization Time Without GPS | +25°C to <2E-010 Accuracy Typ: Rubidium: <8 min, Filter: <15 min | |||||
| Supply Voltage (Vdd) | +8V to +36V max, +12V nominal | |||||
| Power Consumption | <5.6W at +25°C steady-state, <17.5W warmup | |||||
| Operating Temperature | -20°C to +70°C baseplate temperature | |||||
| g-sensitivity | Rubidium: <0.2ppb/g/axis, Filter OCXO: <1ppb/g/axis | |||||
| Rubidium Retrace Error (24hrs on, 48hrs off, 12hrs on) | <0.05ppb at +25°C | |||||
| Magnetic Sensitivity | Less than 0.07ppb per Gauss | |||||
| Storage Temperature | -55°C to +100°C | |||||
| MTBF | >> 200,000 Hours at +40°C baseplate | |||||
| USB, LCD support (accessible inside enclosure only) | RS-232 or USB controlled, supports 16×2 LCD Displays | |||||
| Ordering Options | Ultimate Part Number: 1004031, Premium PN: 1004030, Standard PN: 1004029 | |||||
| Phase Noise ordering options
*It is assumed that the test is performed under static conditions (no vibration), in still air (unit shielded from airflow), and after a minimum of 48 hours warmup. Low Noise outputs are measured. |
Offset | Ultimate PN* | Premium PN* | Standard PN | ||
| 1Hz | <-114dBc/Hz | -108dBc/Hz | -70dBc/Hz | |||
| 10Hz | <-145dBc/Hz | -141dBc/Hz | -98dBc/Hz | |||
| 100Hz | <-155dBc/Hz | -152dBc/Hz | -125dBc/Hz | |||
| 1KHz | <-162dBc/Hz | -160dBc/Hz | -145dBc/Hz | |||
| 10kHz | <-165dBc/Hz | -163dBc/Hz | -153dBc/Hz | |||
| 100kHz | <-167dBc/Hz | -165dBc/Hz | -154dBc/Hz | |||
