描述
新的JLT Micro JLT被设计为下一代GNSSDO(tm)，具有比传统GPSDO更低的SWaP-C和更高的性能。该单元专为高容量、低成本的应用而设计，提供了JLT销售的坚固的平台。它使用最新一代全球导航卫星系统接收器（低成本GPS/Gileo选项也可用于成本敏感的应用），在形式和功能上与广受欢迎的FireFly-IIA GPSDO兼容，并为高振动/高冲击环境提供额外功能。
Micro JLT提供了传统FireFly IIA和Mini JLT产品的一个子集功能，以降低成本，同时提供可比的和更高的性能，并能够利用流水线制造技术解决大批量应用。Micro JLT与JLT网站支持页面上提供的GPSCon控制程序免费软件兼容，并可提供大量振荡器选项，如超扩展温度范围SOCXO、DOCXO和低功耗/加固DOCXO。
特点
- 新一代GNSS接收机
- 具有超低相位噪声的10MHz正弦波
- LVDS、RS-422或TTL接口
- 极佳的性价比
- 超坚固的SOCXO或DOCXO
- 极佳的SWaP-C性能
- SMA连接器，用于天线输入和10MHz输出
技术参数
扩展温度范围
| Module Specification: | ||||
| 1 PPS Stability | <10ns to UTC RMS (1-Sigma) GPS Locked | |||
| Serial Control | GNSS NMEA and Status Output, SCPI-99 control, RS-422 Port | |||
| GNSS Frequency, antenna power | GPS/Glonass/Galileo/BeiDou/QZSS 3.3V antenna-power built-in | |||
| GNSS Receiver | 72 Channels, Auto-Survey, Position-Hold Mode, and SBAS capable | |||
| Sensitivity | Acquisition –148 dBm, Tracking -167 dBm | |||
| GNSS TTFF | Cold Start – <29 sec, Warm Start – <2 sec, Hot Start – <2 sec | |||
| ADEV SOCXO at 25.0°C, no airflow/motion/vibration, 5 days GPS locked | 0.1s < 3E-12, 1s < 6E-12, 1Ks < 9E-12, 10Ks < 4E-12 | |||
| Holdover at 25.0°C, no airflow, no motion/vibration, 5 days GPS locked | <2us in 5 hours | |||
| Warmup and Stabilization Time | <12 min at +25°C to <1E-09 Accuracy to GNSS | |||
| Supply Voltage (Vdd) | 5.5V +0.5V/-0.3V, 5.0V optional | |||
| Power Consumption | <2.6W @25C, <6W during warmup (SOCXO) | |||
| Operating Temperature | -40°C to +85°C | |||
| 1PPS External Reference Input | Supports an optional external 1PPS TTL/CMOS input | |||
| 10MHz output | +8.5dBm ±0.5dB | |||
| 1PPS Output | OCXO flywheel generated, LVDS | |||
| Oscillator Specification: | ||||
| Frequency Output | 10MHz Sine Wave | |||
| 10MHz Retrace | <±1E-09 After 1 Hour @ +25°C (no GNSS) | |||
| Frequency Stability over Temperature, and over 24hrs | ±6E-09, <1E-012 over 24hrs (with GNSS), ±2E-010 optional w. DOCXO | |||
| Output Harmonics, spurs | <-50dBc/Hz, <-125dBc/Hz | |||
| OCXO aging (fully compensated by GNSS) | <±0.1ppm per year without GNSS | |||
| Phase Noise @ 10MHz | SOCXO | |||
| 1Hz | -92dBc/Hz | |||
| 10Hz | -128dBc/Hz | |||
| 100Hz | -150dBc/Hz | |||
| 1kHz | -156dBc/Hz | |||
| 10kHz | -157dBc/Hz | |||
| 100KHz | <-162dBc/Hz | |||
| Connections: | Connector Type: | |||
| 10MHz Sine Wave Out, GNSS Antenna | SMA | |||
| +5.5V Power, 1PPS output, RS-422 serial | 12-pin Hirose, PN: DF11-12DP-2DSA(01) | |||
| 3-pin 100mil through hole (optional) | 1PPS Input, ISP# | |||
低g，扩展温度范围
| Module Specification: | ||||
| 1 PPS Stability | <10ns to UTC RMS (1-Sigma) GPS Locked | |||
| Serial Control | GNSS NMEA and Status Output, SCPI-99 control, RS-422 Port | |||
| GNSS Frequency, antenna power | GPS/Glonass/Galileo/BeiDou/QZSS 3.3V antenna-power built-in | |||
| GNSS Receiver | 72 Channels, Auto-Survey, Position-Hold Mode, and SBAS capable | |||
| Sensitivity | Acquisition –148 dBm, Tracking -167 dBm | |||
| GNSS TTFF | Cold Start – <29 sec, Warm Start – <2 sec, Hot Start – <2 sec | |||
| ADEV DOCXO at 25.0°C, no airflow/motion/vibration, 5 days GPS locked | 0.1s < 2E-12, 1s < 5E-12, 1Ks < 7E-12, 10Ks < 4E-12 | |||
| Holdover at 25.0°C, no airflow, no motion/vibration, 5 days GPS locked | <2us in 24 hours | |||
| Warmup and Stabilization Time | <12 min at +25°C to <5E-010 Accuracy to GNSS | |||
| Supply Voltage (Vdd) | 5.0V +0.5V/-0.3V, (5.5V optional) | |||
| Power Consumption | <3.2W @25C, <7W during warmup (DOCXO) | |||
| Operating Temperature | -40°C to +85°C | |||
| 1PPS External Reference Input | Supports an optional external 1PPS TTL/CMOS input | |||
| 10MHz output | +8.5dBm ±0.5dB | |||
| 1PPS Output | OCXO flywheel generated, LVDS | |||
| Oscillator Specification: | ||||
| Frequency Output | 10MHz Sine Wave | |||
| 10MHz Retrace | <±5E-010 After 1 Hour @ +25°C (no GNSS) | |||
| Frequency Stability over Temperature, and over 24hrs | ±2E-010, 5E-013 over 24hrs (with GNSS) | |||
| Output Harmonics, spurs | <-50dBc/Hz, <-125dBc/Hz | |||
| OCXO aging (fully compensated by GNSS) | <±0.05ppm per year without GNSS | |||
| Phase Noise @ 10MHz | DOCXO | |||
| 1Hz | -100dBc/Hz | |||
| 10Hz | -130dBc/Hz | |||
| 100Hz | -140dBc/Hz | |||
| 1kHz | -152dBc/Hz | |||
| 10kHz | -156dBc/Hz | |||
| 100KHz | -158dBc/Hz | |||
| Connections: | Connector Type: | |||
| 10MHz Sine Wave Out, GNSS Antenna | SMA | |||
| +5V Power, 1PPS output, RS-422 serial | 12-pin Hirose, PN: DF11-12DP-2DSA(01) | |||
| 3-pin 100mil through hole (optional) | 1PPS Input, ISP# | |||
