描述
LC_XO只有0.97 x 0.97英寸小。LC_XO被设计为焊接到客户PCB上，或者插入100mil管脚间隔的DIP插座中。LC_XO专为高产能、低成本的生产应用而设计。它提供了Jackson Labs 的GPSDO的所有软件功能，如完全SCPI命令支持、NMEA输出支持、WAAS/EGNOS/MSAS 50通道GPS接收器、10MHz和1PPS输入和1PPS输出，并且是可现场升级的固件。LC_XO有OCXO或TCXO两种版本，是超小的SWaP GPSDO。相位噪声和频率稳定性不受影响，该装置在运行5小时内实现了-155dBc/Hz的底噪，频率稳定性优于万亿分之5。该装置包括内部3.3V至5V DC-DC电源和滤波器，可向外部客户电路以及外部GPS天线提供高达50mA的5V电压。该装置提供TTL格式和串行格式的报警/事件/锁定状态信号，板上有一个双LED用于状态指示。
特点
- 超小型（0.97 x 0.97英寸）GPSDO
- 低成本OCXO或TCXO版本
- 小于5W（TCXO），+3.3V电源
- +/-25ppb的温度稳定性
- 可以焊接到PCB上，也可以插入插座
- 加热器快速预热不到1分钟
- 具有自动切换功能的外部1PPS输入
技术参数
LC_XO OCXO
| Module Specification: | |||||
| 1 PPS Accuracy | ±35ns to UTC RMS (1-Sigma) GPS Locked | ||||
| Holdover Stability after 72 hours with GPS | <±20us over 3 Hour Period @+25°C (No Motion, no airflow) | ||||
| 1 PPS Output | 3.3VDC CMOS | ||||
| Serial Control | SCPI-99 TTL Level, GPS NMEA Output | ||||
| GPS Frequency | L1, C/A 1574MHz | ||||
| GPS Antenna | Active or Passive | ||||
| GPS Receiver | 50 Channels, Mobile, SBAS WAAS, EGNOS, MSAS capable | ||||
| Sensitivity | Acquisition –142 dBm, Tracking -158 dBm | ||||
| GPS TTFF | Cold Start – <45 sec, Warm Start – 1 sec, Hot Start – 1 sec | ||||
| ADEV | 10Ks <5E-012 (OCXO, GPS Locked, 25°C, no motion, no airflow) | ||||
| TTL Alarm Output | GPS LOCK indicator | ||||
| Warm Up Time / Stabilization Time | <5 min at +25°C to 1E-08 Accuracy | ||||
| Supply Voltage (Vdd) | 3.3V Single-Supply only (5V internally generated and filtered) | ||||
| Power Consumption | 0.7W steady-state | ||||
| Operating Temperature | 0°C to +60°C, -20C to +75C optional | ||||
| Storage Temperature | -45°C to +85°C | ||||
| Additional Features | Firmware field-upgradable, external 1PPS input, status LEDs, compatible to GPSCon, SNTP, GPSD, and Z38xx software applications, full NMEA | ||||
| Oscillator Specification (OCXO): | |||||
| Frequency Output | 10MHz CMOS 5Vpp (3.3Vpp optional) | ||||
| 10MHz Retrace | ±2E-08 After 1 Hour @ +25°C | ||||
| Frequency Stability Over Temperature (GPS Unlock Condition) | ±2.5E-08 | ||||
| Output Amplitude | 5Vpp CMOS | ||||
| OCXO Warm Up Time | < 1 min @ +25°C | ||||
| Phase Noise (with 33uF or larger cap on 5V_Output pin 6) | TCXO | OCXO | |||
| 1Hz | -65dBc/Hz | -75dBc/Hz | |||
| 10Hz | -102dBc/Hz | -110dBc/Hz | |||
| 100Hz | -132dBc/Hz | -132dBc/Hz | |||
| 1kHz | -148dBc/Hz | -142dBc/Hz | |||
| 10kHz | -152dBc/Hz | -145dBc/Hz | |||
| 100KHz | <-155dBc/Hz | <-150dBc/Hz | |||
| Connections: | Connector Type: | ||||
| 1PPS Output, 10MHz Output, power, serial communication, system status, NMEA, 1PPS in, ISP mode enable, antenna input | 100 mil spacing on pins, can be soldered, or plugged into a socket, gold-plated pins | ||||
LC_XO TCXO
| Module Specification: | ||||
| 1 PPS Accuracy | ±50ns to UTC RMS (1-Sigma) GPS Locked | |||
| Holdover Stability | <±35us over 3 Hour Period @+25°C (No Motion, No Airflow) | |||
| 1 PPS Output | 3.3VDC CMOS | |||
| Serial Control | SCPI-99 TTL Level, GPS NMEA Output | |||
| GPS Frequency | L1, C/A 1574MHz | |||
| GPS Antenna | Active or Passive | |||
| GPS Receiver | 50 Channels, Mobile, SBAS WAAS, EGNOS, MSAS capable | |||
| Sensitivity | Acquisition –142 dBm, Tracking -158 dBm | |||
| GPS TTFF | Cold Start – <45 sec, Warm Start – 1 sec, Hot Start – 1 sec | |||
| ADEV | 10Ks <2E-012 (GPS Locked, 25°C, no motion, no airflow) | |||
| TTL Alarm Output | GPS LOCK indicator | |||
| Warm Up Time / Stabilization Time | <10 min at +25°C to 1E-09 Accuracy | |||
| Supply Voltage (Vdd) | 3.3V Single-Supply only (5V internally generated and filtered) | |||
| Power Consumption | 0.4W with TCXO | |||
| Operating Temperature | -10°C to +75°C, -40C to +85C optional | |||
| Storage Temperature | -45°C to +85°C | |||
| Additional Features | Firmware field-upgradable, external 1PPS input, status LEDs, compatible to GPSCon, SNTP, GPSD, and Z38xx software applications, full NMEA | |||
| Oscillator Specification (TCXO): | ||||
| Frequency Output | 10MHz CMOS 5Vpp (3.3Vpp optional) | |||
| 10MHz Retrace | ±2E-08 After 1 Hour @ +25°C | |||
| Frequency Stability Over Temperature (Unlock Condition) | ±7.5E-08 (TCXO, 0C to +60C) | |||
| Output Amplitude | 5Vpp CMOS | |||
| TCXO Warm Up Time | Instant-on, no warmup period required | |||
| Phase Noise (with 33uF or larger cap on 5V_Output pin 6) | TCXO | |||
| 1Hz | -65dBc/Hz | |||
| 10Hz | -102dBc/Hz | |||
| 100Hz | -132dBc/Hz | |||
| 1kHz | -148dBc/Hz | |||
| 10kHz | -152dBc/Hz | |||
| 100KHz | <-155dBc/Hz | |||
| Connections: | Connector Type: | |||
| 1PPS Output, 10MHz Output, power, serial communication, system status, NMEA, 1PPS in, ISP mode enable, antenna input | 100 mil spacing on pins, can be soldered, or plugged into a socket, gold-plated pins | |||
