描述
突破性的LTE Lite频率和定时SMT模块将GPS接收器、滤波电源和软件控制的晶体振荡器集成到0.7 x 1.18英寸的GPSDO SMT模块中。LTE Lite使用真正的模拟晶体驯服，实现卓越的相位噪声和抖动性能。LTE Lite时间和频率参考为成本敏感的网络设备提供GNSS时间和频率同步，特别是LTE 4G应用和从微蜂窝到飞蜂窝的小蜂窝产品。LTE-Lite在SMT形式上提供了平均超过十亿分之一的频率精度和超过10纳秒的定时精度，适合大批量生产产品，成本点可由低成本的小站制造商控制。LTE Lite以1Hz或5Hz的速率提供所有标准NMEA输出消息。提供真正的5Hz GPS NMEA消息可以在无人机和其他移动应用程序中进行非常精确的定位。LTE Lite还提供具有振荡器锁定状态和健康信息的专有NMEA消息，对于没有串行接口的应用程序，相同的信息被镜像在TTL状态输出上。
LTE Lite SMT模块以易于使用的评估套件形式提供，其中包括操作该单元的所有附件。
特点
- SMT，0.7 x 1.2 x 0.1英寸
- 电信频率：192、10、12.288、16.384、19.2、20、26、30.72、38.4、40、49.152MHz
- 内部65通道GPS和TCXO
- 3V操作，极低功耗，TTL带配置
- 两个独立的频率输出（一个合成）
- 支持训练包括CSAC在内的外部振荡器
- 完整NMEA输出，具有1Hz和5Hz PVT更新率，以及振荡器锁定状态消息
技术参数
10MHz SMT GPSDO
| Module Specification: | ||||
| 1 PPS Timing Accuracy from GPS receiver | <8ns to UTC RMS (1-Sigma) GPS Locked | |||
| Holdover Stability (1 week with GPS) | <±50us over 3 Hour Period @+25°C (No Motion, No Airflow) | |||
| 1 PPS Output | 3.3VDC CMOS | |||
| Serial Port | TTL Level, GPS NMEA Output with 1Hz or 5Hz update rate | |||
| GPS Frequency | L1, C/A 1574MHz | |||
| GPS Antenna | Active or Passive (0dB to +30dB gain) | |||
| GPS Receiver | 65 Channels, QZSS, SBAS WAAS, EGNOS, MSAS capable Supports Position and Hold over-determined clock mode | |||
| Sensitivity | Acquisition –148 dBm, Tracking -165 dBm | |||
| GPS TTFF | Cold Start – <32 sec, Warm Start – 1 sec, Hot Start – 1 sec | |||
| ADEV | 10s: <7E-011, 10Ks: <2E-012 (GPS Locked, 25°C, no motion, no airflow) | |||
| TTL Alarm Output | GPS LOCK indicator, ALARM output, Survey status, Warmup status | |||
| Warm Up Time / Stabilization Time | <10 min at +25°C to better than 1E-09 Accuracy | |||
| Supply Voltage (Vdd) | 3.3V Single-Supply, +0.2V/-0.15V | |||
| Power Consumption | <0.16W | |||
| Operating Temperature | -10°C to +70°C, -40°C to +85°C optional | |||
| Additional Features | Firmware field-upgradable, status LED, external oscillator option | |||
| Oscillator Specification (internal): | ||||
| Frequency Output of low Phase Noise crystal | 10MHz CMOS 3Vpp | |||
| Secondary Synthesized CMOS output (Phase-Locked to 10MHz) | TTL selectable: 80MHz/40MHz/26.666MHz/20/16MHz/13.333MHz/5MHz | |||
| 20MHz Retrace | ±2E-08 After 1 Hour @ +25°C without GPS | |||
| Frequency Stability Over Temperature (0°C to +60°C) | ±0.1ppm (internal TCXO without GPS) | |||
| RF Output Amplitude | 3Vpp CMOS | |||
| 20MHz Phase Jitter (100Hz to 10MHz) | <0.135ps rms | |||
| Phase Noise at 10MHz | at 10MHz | |||
| 1Hz | -69dBc/Hz | |||
| 10Hz | -96dBc/Hz | |||
| 100Hz | -119dBc/Hz | |||
| 1kHz | -138dBc/Hz | |||
| 10kHz | -150dBc/Hz | |||
| 100KHz | <-155dBc/Hz | |||
| Connections: | Connector Type: | |||
| 1PPS Outputs (2x), 10MHz Output, power, system status, NMEA, ISP mode enable, antenna input, Synthesized reference frequency output | SMT module with 50 mils (1.27mm) pin spacing, U.FL RF antenna | |||
19.2MHz SMT GPSDO
| Module Specification: | ||||
| 1 PPS Timing Accuracy from GPS receiver | <8ns to UTC RMS (1-Sigma) GPS Locked | |||
| Holdover Stability (1 week with GPS) | <±50us over 3 Hour Period @+25°C (No Motion, No Airflow) | |||
| 1 PPS Output | 3.3VDC CMOS | |||
| Serial Port | TTL Level, GPS NMEA Output with 1Hz or 5Hz update rate | |||
| GPS Frequency | L1, C/A 1574MHz | |||
| GPS Antenna | Active or Passive (0dB to +30dB gain) | |||
| GPS Receiver | 65 Channels, QZSS, SBAS WAAS, EGNOS, MSAS capable Supports Position and Hold over-determined clock mode | |||
| Sensitivity | Acquisition –148 dBm, Tracking -165 dBm | |||
| GPS TTFF | Cold Start – <32 sec, Warm Start – 1 sec, Hot Start – 1 sec | |||
| ADEV | 10s: <7E-011, 10Ks: <2E-012 (GPS Locked, 25°C, no motion, no airflow) | |||
| TTL Alarm Output | GPS LOCK indicator, ALARM output, Survey status, Warmup status | |||
| Warm Up Time / Stabilization Time | <10 min at +25°C to better than 1E-09 Accuracy | |||
| Supply Voltage (Vdd) | 3.3V Single-Supply, +0.2V/-0.15V | |||
| Power Consumption | <0.16W | |||
| Operating Temperature | -10°C to +70°C, -40°C to +85°C optional | |||
| Additional Features | Firmware field-upgradable, status LED, external oscillator option | |||
| Oscillator Specification (internal): | ||||
| Frequency Output of low Phase Noise crystal | 19.2MHz CMOS 3Vpp | |||
| Secondary Synthesized CMOS output (Phase-Locked to 19.2MHz) | TTL selectable 76.8MHz/38.4MHz/25.6MHz/15.36MHz/12.8MHz/9.6MHz/4.8MHz | |||
| 19.2MHz Retrace | ±2E-08 After 1 Hour @ +25°C without GPS | |||
| Frequency Stability Over Temperature (0°C to +60°C) | ±0.1ppm (internal TCXO without GPS) | |||
| RF Output Amplitude | 3Vpp CMOS | |||
| 19.2MHz Phase Jitter (100Hz to 10MHz) | <0.135ps rms | |||
| Phase Noise at 20MHz | at 19.2MHz | |||
| 1Hz | -65dBc/Hz | |||
| 10Hz | -92dBc/Hz | |||
| 100Hz | -116dBc/Hz | |||
| 1kHz | -136dBc/Hz | |||
| 10kHz | -148dBc/Hz | |||
| 100KHz | <-155dBc/Hz | |||
| Connections: | Connector Type: | |||
| 1PPS Outputs (2x), 19.2MHz Output, power, system status, NMEA, ISP mode enable, antenna input, Synthesized reference frequency output | SMT module with 50 mils (1.27mm) pin spacing, U.FL RF antenna | |||
20MHz SMT GPSDO
| Module Specification: | ||||
| 1 PPS Timing Accuracy from GPS receiver | <8ns to UTC RMS (1-Sigma) GPS Locked | |||
| Holdover Stability (1 week with GPS) | <±50us over 3 Hour Period @+25°C (No Motion, No Airflow) | |||
| 1 PPS Output | 3.3VDC CMOS | |||
| Serial Port | TTL Level, GPS NMEA Output with 1Hz or 5Hz update rate | |||
| GPS Frequency | L1, C/A 1574MHz | |||
| GPS Antenna | Active or Passive (0dB to +30dB gain) | |||
| GPS Receiver | 65 Channels, QZSS, SBAS WAAS, EGNOS, MSAS capable Supports Position and Hold over-determined clock mode | |||
| Sensitivity | Acquisition –148 dBm, Tracking -165 dBm | |||
| GPS TTFF | Cold Start – <32 sec, Warm Start – 1 sec, Hot Start – 1 sec | |||
| ADEV | 10s: <7E-011, 10Ks: <2E-012 (GPS Locked, 25°C, no motion, no airflow) | |||
| TTL Alarm Output | GPS LOCK indicator, ALARM output, Survey status, Warmup status | |||
| Warm Up Time / Stabilization Time | <10 min at +25°C to better than 1E-09 Accuracy | |||
| Supply Voltage (Vdd) | 3.3V Single-Supply, +0.2V/-0.15V | |||
| Power Consumption | <0.16W | |||
| Operating Temperature | -10°C to +70°C, -40°C to +85°C optional | |||
| Additional Features | Firmware field-upgradable, status LED, external oscillator option | |||
| Oscillator Specification (internal): | ||||
| Frequency Output of low Phase Noise crystal | 20MHz CMOS 3Vpp | |||
| Secondary Synthesized CMOS output (Phase-Locked to 20MHz) | TTL selectable: 80MHz/40MHz/26.666MHz/16MHz/13.333MHz/10MHz/5MHz | |||
| 20MHz Retrace | ±2E-08 After 1 Hour @ +25°C without GPS | |||
| Frequency Stability Over Temperature (0°C to +60°C) | ±0.1ppm (internal TCXO without GPS) | |||
| RF Output Amplitude | 3Vpp CMOS | |||
| 20MHz Phase Jitter (100Hz to 10MHz) | <0.135ps rms | |||
| Phase Noise at 20MHz | at 20MHz | |||
| 1Hz | -65dBc/Hz | |||
| 10Hz | -92dBc/Hz | |||
| 100Hz | -116dBc/Hz | |||
| 1kHz | -136dBc/Hz | |||
| 10kHz | -148dBc/Hz | |||
| 100KHz | <-155dBc/Hz | |||
| Connections: | Connector Type: | |||
| 1PPS Outputs (2x), 20MHz Output, power, system status, NMEA, ISP mode enable, antenna input, Synthesized reference frequency output | SMT module with 50 mils (1.27mm) pin spacing, U.FL RF antenna | |||
24.576MHz SMT GPSDO
| Module Specification: | ||||
| 1 PPS Timing Accuracy from GPS receiver | <8ns to UTC RMS (1-Sigma) GPS Locked | |||
| Holdover Stability (1 week with GPS) | <±50us over 3 Hour Period @+25°C (No Motion, No Airflow) | |||
| 1 PPS Output | 3.3VDC CMOS | |||
| Serial Port | TTL Level, GPS NMEA Output with 1Hz or 5Hz update rate | |||
| GPS Frequency | L1, C/A 1574MHz | |||
| GPS Antenna | Active or Passive (0dB to +30dB gain) | |||
| GPS Receiver | 65 Channels, QZSS, SBAS WAAS, EGNOS, MSAS capable Supports Position and Hold over-determined clock mode | |||
| Sensitivity | Acquisition –148 dBm, Tracking -165 dBm | |||
| GPS TTFF | Cold Start – <32 sec, Warm Start – 1 sec, Hot Start – 1 sec | |||
| ADEV | 10s: <7E-011, 10Ks: <2E-012 (GPS Locked, 25°C, no motion, no airflow) | |||
| TTL Alarm Output | GPS LOCK indicator, ALARM output, Survey status, Warmup status | |||
| Warm Up Time / Stabilization Time | <10 min at +25°C to better than 1E-09 Accuracy | |||
| Supply Voltage (Vdd) | 3.3V Single-Supply, +0.2V/-0.15V | |||
| Power Consumption | <0.16W | |||
| Operating Temperature | -10°C to +70°C, -40°C to +85°C optional | |||
| Additional Features | status LED, external oscillator option | |||
| Oscillator Specification (internal): | ||||
| Frequency Output of low Phase Noise crystal | 24.576MHz CMOS 3Vpp | |||
| Secondary Synthesized CMOS output (Phase-Locked to 24.576MHz) | 98.304MHz/49.152MHz/32.768/16.384/12.288/8.192/4.089MHz | |||
| 24.576MHz Retrace | ±2E-08 After 1 Hour @ +25°C without GPS | |||
| Frequency Stability Over Temperature (0°C to +60°C) | ±0.1ppm (internal TCXO without GPS) | |||
| RF Output Amplitude | 3Vpp CMOS | |||
| 24.576MHz Phase Jitter (100Hz to 10MHz) | <0.135ps rms | |||
| Phase Noise at 24.576MHz | at 24.576MHz | |||
| 1Hz | -62dBc/Hz | |||
| 10Hz | -90dBc/Hz | |||
| 100Hz | -112dBc/Hz | |||
| 1kHz | -132dBc/Hz | |||
| 10kHz | -144dBc/Hz | |||
| 100KHz | <-153dBc/Hz | |||
| Connections: | Connector Type: | |||
| 2x 1PPS Outputs, 24.576MHz Output, power, system status, NMEA, ISP mode enable, antenna input, Synthesized reference frequency output | SMT module with 50 mils (1.27mm) pin spacing, U.FL RF antenna | |||
