Board Mounted GPSDO (OCXO) Recommended for USRP X300/X310

GPSDO for USRP X Series (PCB-Mounted GPS-Disciplined OCXO)

Ettus公司的载GPSDO模块(OCXO),配合USRP X300/X310使用.提供高精度的10MHz以及1PPS参考时钟,提供给需要紧密同步需求或全局时序对齐小于50ns的应用.

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产品概述

GPSDO (OCXO),兼容USRP X300或X310。它也可以与USRP B200/B210一起使用,但是系统需要外部电源。GPSDO提供了一个高精度的10MHz参考频率和1个PPS信号,允许开发人员构建一个系统,为应用提供更高的频率精度和全局定时校准。




Module Specifications




1 PPS Accuracy

±50ns to UTC RMS (1-Sigma) GPS Locked


Holdover Stability

<±20μs over 3 hour period at +25C


1 PPS Output (OCXO Flywheel Generated)

3.3VDC CMOS


RS-232 Control

NMEA & SCPI-99 Control Commands, Integrated into UHD


GPS Frequency

L1, C/A 1574MHz


GPS Antenna

Active (5V compatible) or Passive


GPS Receiver

50 Channels, Mobile, WAAS, EGNOS, MSAS capable


Sensitivity

Acquisition -142dBm, Tracking -168dBm


TTFF

Cold Start: <45 sec, Warm Start: 1 sec, Hot Start: 1 sec


ADEV

1E-11 at 1s


Warm Up Time / Stabilization Time

<5 min at +25C to 1E-08 Accuracy


Supply Voltage (Vdd)

3.3/5VDC


Power Consumption

0.7W Max


Operating Temperature

0C to +60C


Storage Temperature

-45C to 85C



Oscillator Specifications




Frequency Output

10MHz


10MHz Retrace

±2E-08 after 1 hour at 25C


Frequency Stability Over Temperature (Unlock Condition)

±2.5E-08


Warm Up Time

< 1 min at +25C


Phase Noise at 10MHz

1Hz

-75dBc/Hz

10Hz

-110dBc/Hz


100Hz

-132dBc/Hz


1kHz

-142dBc/Hz


10kHz

<-145dBc/Hz


其他资源

Kit Contents:

  • Board-Mounted GPSDO (OCXO)

  • Documentation for Installation and Configuration/Setup

Recommended for Use With:

  • A USRP X300 and USRP X310 for a high-accuracy clock reference.

  • Add a GPSDO Mini GPS Antenna to synchronized the GPSDO to the GPS  constellation for 25 ppb frequency accuracy and 50 ns alignment across  the globe.

Additional Information:

  • GPSDO Selection Guide

  • GPSDO Software Setup and API

  • USRP™ X300/X310 Configuration Guide

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